JP7222825B2 - Wooden building structural frame and joint members - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wooden building structural skeleton that can be suitably employed in medium- or large-scale wooden buildings, and a joining member suitable for use in this wooden building structural skeleton.

Wooden buildings are often used for detached houses, but they are also used for medium- or large-scale buildings such as public facilities such as assembly halls, gymnasiums, housing complexes, and factories. For such a wooden building, a so-called flexible structure, which allows flexible deformation against horizontal forces such as earthquakes, has been proposed to prevent damage and collapse of the structural framework.

Patent Literature 1 proposes a structure in which the leg of a column is joined to a foundation, and a structure that allows rotational deformation of the lower end of the column when a horizontal force acts on the column and can impart a restoring force. . In this column base joint structure, the lower end of the column is pressed against the foundation by the tension of tendons arranged in the axial direction of the column, and this tension acts as a restoring force against the rotational deformation of the lower end of the column. is.
Moreover, in Patent Document 2, an energy dissipator is attached between adjacent load-bearing elements, energy is absorbed by relative displacement occurring between both load-bearing elements, and vibration of the structure at the time of an earthquake etc. is damped. is.

Japanese Patent Application Laid-Open No. 2019-44401 Japanese Patent Publication No. 2010-500493

In such wooden buildings, there are the following problems that need to be solved.
In order to obtain the restoring force of the column, if the lower end of the column is strongly pressed against the foundation by the tension force of the tendon, a large degree of compressive stress is generated in the cross section of the column. For this reason, when trying to obtain a large restoring force, it becomes difficult to maintain the strength of the columns that support the load.

In addition, as the size of the building increases, the cross-sectional dimension of the column increases, and when the column tilts due to the action of a horizontal force, the side surface of the column is displaced in the vertical direction. When such displacement occurs, excessive force acts on the beams and floor structures that are joined to the columns, which may cause damage or excessive deformation.

On the other hand, joint members have been proposed that provide resistance to the relative displacement of adjacent load-bearing elements, that is, structural members, and that absorb energy through plastic deformation, and are suitable for large structures. A joining member is desired. Moreover, when the relative displacement between the structural members increases and the plastic deformation remains in the joint member, it is desirable to replace the joint member with a new one so that the state before the deformation occurs can be restored.

The present invention has been made in view of the circumstances as described above, and its object is to provide a wooden building structure having a large load-bearing capacity and restoring force against horizontal forces such as earthquakes, and It is an object of the present invention to provide a joining member that can be suitably used in such a wooden building structural skeleton and that can be easily replaced.

In order to solve the above-mentioned problems, the invention according to claim 1 is a pillar with a flat rectangular cross section in which the width of a pair of side surfaces adjacent to each other is larger than that of a pair of side surfaces, and which is a wooden material erected on a foundation. a flat pillar , which faces the narrow side surface of the flat pillar with a gap, and is erected on the foundation; and a beam whose one end is supported by the axial pillar and which is supported substantially horizontally. and a tendon whose lower end is fixed to the foundation and whose upper end is fixed to the flat column by introduction of tension force, wherein the flat column and the shaft column are opposed side surfaces of the flat column. and the side of the shaft pillar by a joint member that allows relative displacement in the vertical direction and provides resistance to the relative displacement in the vertical direction, and the floor structure is the beam or the shaft pillar and wherein the flat columns provide a wooden building structural skeleton that allows relative displacement in the vertical direction with respect to the floor structure.

In this wooden building structural frame, when a horizontal force acts along the wide side of the flat column, both the flat column and the shaft column are tilted. A relative displacement occurs. On the other hand, since the joint member that joins the flat column and the shaft column allows relative displacement and provides resistance, it allows flexible deformation of the structural frame and prevents collapse. Therefore, it is possible to obtain a structure having a large resistance force.
In addition, even if a horizontal force acts on the flat column and rotational displacement occurs at the lower end of the flat column so that the tension side is lifted, a force acts in the direction of pressing the lower surface of the flat column against the foundation due to the tension of the tendon, It becomes a force to restore the deformation of the structural frame.
Since the load acting on the floor structure is supported by the shaft column, the load acting on the flat column is reduced, and the tension of the tendons allows the flat column to be strongly pressed against the foundation within the limit of compressive stress. . Therefore, a stable and large restoring force can be obtained.
Furthermore, when a flat column tilts in the direction along its wide side, the vertical displacement at the edge of this side increases. By permitting dynamic displacement, it is possible to avoid excessive strain on the floor structure and beams, and restraint on the flexible deformation of the structural frame.
The other end of the beam whose one end is supported by the shaft pillar may be supported by another shaft pillar, or may be supported by another structural member. Floor structures also include those supported by beams or pillars and also by other structural members.

The invention according to claim 2 is the wooden building structural skeleton according to claim 1, wherein the flat pillar continues to the height of the ceiling of the top floor, and the distance between the axial pillar and the flat pillar is maintained from the bottom end to the top end of the flat column.

This wooden building structural skeleton allows flexible deformation of a wooden building having multiple floors and has resistance to collapse.

The invention according to Claim 3 is the wooden building structural skeleton according to Claim 1 or Claim 2, wherein the joining members are made of metal and undergo elastic deformation, and also undergo plastic deformation when a predetermined amount of deformation is exceeded. shall be

In this wooden building structural frame, when the relative displacement between the flat column and the shaft column is small, the joint members behave elastically, allowing the structural frame to flexibly deform and having a restoring force. Then, when a large horizontal force repeatedly acts on the structural frame, such as during an earthquake, the relative displacement between the flat column and the shaft column increases, causing plastic deformation of the joint members. At this time, the stress-strain history of the joint member becomes loop-shaped, absorbing energy and attenuating the vibration.

The invention according to claim 4 is the wooden building structural framework according to any one of claims 1 to 3, wherein a plurality of the flat columns are provided, and the wide side surfaces are oriented in directions perpendicular to each other. It is assumed to include multiple flattened columns.

This wooden architectural frame can be constructed to have earthquake resistance and restoring force by flexibly allowing deformation against horizontal forces acting in all directions.

The invention according to claim 5 is the wooden building structural skeleton according to claim 4, wherein a shaft pillar facing a narrow side surface of a first flat pillar among the plurality of flat pillars, and a second flat pillar The shaft pillar facing the narrow side surface of the is an intermediate shaft pillar erected with the beam spanning between them or at a distance from the shaft pillar, and both ends of the shaft pillar or the intermediate Together with the beams supported by the shaft pillars, they constitute a framework structure.

In this wooden building structural frame, a series of building structural frames including a plurality of flat columns can be formed by a framework structure composed of shaft columns and beams, or these and intermediate shaft columns. As a result, the flat columns are placed in appropriate positions according to the scale, arrangement of columns and walls, seismic performance, etc. required for the building frame, and a structure that flexibly resists horizontal forces acting in all directions. It becomes possible to
In addition, the above-mentioned frame structure may be one in which all the shaft columns are connected by beams etc. in one wooden building structure, or a plurality of separated frame structures are joined via flat columns. It may be constructed to form a series of architectural structures.

The invention according to claim 6 is the wooden building structural frame according to claim 5, wherein the frame structure is a rigid frame structure in which a bending moment is transmitted between the beam and the shaft pillar or the intermediate shaft pillar. and

In this wooden architectural frame, the frame structure has a Rahmen structure and has a function of resisting horizontal force. As a result, the function of resisting horizontal force is distributed, and a structure having stable resistance to seismic motion can be obtained.

The invention according to claim 7 is the wooden building structural frame according to claim 4, wherein one of the shaft columns has a plurality of wide side surfaces oriented in directions perpendicular to each other on two or more side surfaces. It is assumed that the flat column or the plurality of flat columns with their wide side surfaces directed in the same direction are joined via the joining member.

In this wooden building structural skeleton, a plurality of flat columns can be concentratedly provided around one shaft column. This increases the degree of freedom in determining the position of the wall, etc., and makes it possible to design the building in accordance with the use of the building.

The invention according to claim 8 is fixed to both of two pillars erected with a space therebetween, and provides resistance to relative displacement of both pillars in the vertical direction and allows the relative displacement. , a joining member made of metal, comprising: two connecting members respectively attached to opposing side surfaces of both columns; and an intermediate plate interposed between the two connecting members that are joined together; Each of the connecting members includes a plate-like mounting portion fixed to the side surface of the pillar, and a substantially horizontal bending line at the upper end portion and the lower end portion of the mounting portion to project toward the opposing pillar. and a bent portion that is bent from the tip of the overhang so as to be substantially parallel to the mounting portion, and the two bent portions of both of the connecting members face each other at two upper and lower positions. Further, the intermediate plate, which is continuous between the upper and lower positions where the bent portions face each other, is sandwiched between the bent portions facing each other to provide a joint member in which both the bent portions are joined.

In this joint member, when the two columns are tilted by the action of horizontal force and relative vertical displacement occurs on the opposing side surfaces of the two columns, the column collapses by resisting this relative displacement. In addition, elastic deformation of the connecting member imparts a restoring force to both columns. In addition, when the relative displacement increases, plastic deformation occurs in the connecting member, and when the relative displacement acts repeatedly while reversing the direction, the stress-strain history of the connecting member becomes loop-shaped, absorbing energy and creating a column. vibration can be damped.
Also, by sandwiching the intermediate plate between the two connecting members, the direction of the bent portion is constrained and the rigidity against relative displacement of the two columns is increased. Then, the area of the connecting member where bending deformation occurs increases, and the amount of energy absorbed when plastic deformation occurs increases.

The invention according to claim 9 is the joint member according to claim 8, wherein a metal mounting board is fixed to the side surface of the column, and the mounting part is superimposed on the mounting board and attached to the mounting board by a mounting bolt. shall be fixed.

With this joint member, the mounting bolts that fix the mounting portion can be pulled out, and the mounting portion can be easily removed from the mounting board. Therefore, when a large relative displacement occurs between the two columns and plastic deformation remains in the connecting member or intermediate plate, the connecting member or intermediate plate can be replaced to easily restore the state before deformation.

The invention according to claim 10 is the joining member according to claim 8 or 9, wherein the projecting portion projects from the mounting portion in a direction inclined toward the side surface of the opposing column.

In this joint member, when the two columns are displaced relative to each other, the overhanging portion is subjected to bending deformation and a force in the axial direction of the overhanging portion. This increases the stiffness of the joining members to resist relative displacement. Therefore, it is possible to set the rigidity of the joining member by adjusting the inclination angle of the projecting portion.

The invention according to Claim 11 is the joining member according to any one of Claims 8 to 10, wherein the intermediate plate is formed of a plate material thicker than the mounting portion, the projecting portion, and the bending portion. It is assumed that there is

In this joining member, the direction of the bent portion is strongly restrained by the intermediate plate, and bending deformation can be effectively caused from the overhanging portion to the bent portion.

As described above, the wooden building structural frame of the present invention allows flexible deformation against horizontal force during an earthquake or the like, and has large load-bearing capacity and restoring force. In addition, the joining member of the present invention can be suitably used in a wooden building structural skeleton that allows flexible deformation, has high energy absorption performance, and is easy to replace.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic perspective view showing a wooden building structural skeleton that is an embodiment of the present invention; FIG. 2 is a front view of the wooden architectural structure skeleton shown in FIG. 1; FIG. 2 is a side view of a part of the wooden building structure skeleton shown in FIG. 1; 1. It is a side view which shows the top end part of a flat pillar and a shaft pillar, and a flat pillar and a shaft pillar which are used with the wooden building structural frame|body shown in FIG. It is a side view which shows the flat cross-sectional view of a flat pillar and a shaft pillar, and the lower end part of a flat pillar and a shaft pillar. FIG. 4 is a cross-sectional view of the lower ends of the flat post and the shaft post; FIG. 4A is a side view and a cross-sectional view showing a structure for connecting the lower ends of a flat column and a shaft column to a foundation; FIG. 4A is a plan view and a side view of a joint member that joins the flat column and the shaft column; FIG. 2 is a schematic diagram showing deformation when a horizontal force acts on the wooden building structural skeleton shown in FIG. 1 ; FIG. 9 is a schematic diagram showing deformation of the joining member shown in FIG. 8 when a horizontal force acts on the wooden building structural frame; FIG. 11 is a schematic plan view showing another example of the arrangement of the flat column and the shaft column; FIG. 4 is a side view showing another example of a joining member that can be used for joining a flat column and a shaft column;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic perspective view showing a wooden building structural body that is one embodiment of the present invention. 2 is a front view of the wooden building structure shown in FIG. 1, and FIG. 3 is a side view.
This wooden building structural skeleton functions as a structure that supports the weight of the wooden building itself and the applied load. A shaft pillar 2 erected to face each other with a gap, an intermediate shaft pillar 3 erected with a predetermined gap from the shaft pillar, between the shaft pillars, between the intermediate shaft pillars, or between the shaft pillars and the intermediate shaft. A plurality of beams 4 bridged between the pillars are used as main members. The flat column 1 and the shaft pillar 2 are joined by a joint member 5 , and the floor structure 6 is supported by the beam 4 , the shaft pillar 2 or the intermediate shaft pillar 3 . In addition, tendons 7 and 8 are arranged in the axial direction of the flat column 1 and the shaft column 2 , and tension force is introduced so as to press the bottom surfaces of the flat column 1 and the shaft column 2 toward the foundation 9 .

The wooden architectural structure shown in FIG. 1 is a three-dimensional structure that combines the above-mentioned flat columns 1, shaft columns 2, intermediate shaft columns 3 and beams 4, and the flat columns 1 have wide side surfaces. One is arranged in the X direction, and the other is arranged with the wide side face in the Y direction. On both sides of each of the flat columns 1, shaft columns 2 are erected to face the narrow side surfaces, and a predetermined distance is maintained between the shaft columns 2 and the flat columns 1 from the lower end to the upper end. there is The flat column 1 and the shaft column 2 are joined by a joining member 5 arranged between them.

In a portion where the distance between the shaft pillar and another shaft pillar becomes large, an intermediate shaft pillar 3 is erected between them. For example, between the shaft pillars 2-2 and 2-3 shown in FIG. 1, three intermediate shaft pillars 3-1, 3-2, 3-3 are erected at predetermined intervals.
The beams 4 are bridged between the shaft pillars, between the shaft pillars and the intermediate shaft pillars, or between the intermediate shaft pillars. Two steps with the lower beam 4b are provided. These beams 4 may be bridged between the shaft pillars or the intermediate shaft pillars and supported so as to mainly transmit the vertical force, or they may be supported vertically at both ends or at one end. It may be supported to transmit directional forces and bending moments.

For example, the upper 4a-5 beam bridged between the shaft pillar 2-6 erected along the flat pillar 1-3 and the shaft pillar 2-7 erected along the flat pillar 1-4 And the lower beam 4b-5, between the shaft pillar 2-2 erected along the flat pillar 1-1 and the shaft pillar 2-3 erected along the flat pillar 1-2, the shaft 2- Upper beams 4a-1, 4a-2, 4a-3, 4a-4 and lower beams 4b-1, 4b- supported by 2, 2-3 or intermediate pillars 3-1, 3-2, 3-3 2, 4b-3, 4b-4 are mainly supported to transmit vertical force, ie shear force. Upper beams 4a-6 and 4a-7 bridged in the Y direction between the shaft pillars 2-2 and 2-8 and between the intermediate shaft pillars 3-1 and 3-4 And the lower beams 4b-6, 4b-7 are supported so as to be able to transmit the bending moment together with the vertical force, and the shaft columns 2-2, 2-8 or the intermediate shaft columns 3-1, 3-4 Together, they form a rigid frame structure.

The flat pillar 1 is made of laminated lumber made by pasting wood pieces of small cross section together, and has a flat rectangular cross section in which the width of the other pair of side surfaces adjacent thereto is larger than that of the pair of opposing side surfaces. It is. As shown in FIG. 4(a), these flat pillars 1 are made by arranging two laminated lumbers 1a having a flat cross section side by side with a gap therebetween so that the wide sides face each other.
A tendon 7 is vertically arranged between the two laminated lumbers 1a, 1a forming the flat column 1. As shown in FIG. A tension force is introduced into these tendons 7, and the lower ends are embedded and fixed in the concrete forming the foundation 9, and the upper ends are fixed to the upper end surfaces of the flat columns 1 via bearing plates 7a.
In the present embodiment, the two laminated lumbers 1a, 1a are used side by side to form the flat column 1, but the flat column may be constituted by a single laminated lumber having a flat cross section. At this time, the tendon is inserted through a vertical through-hole formed in the laminated material.

Like the flat column 1, the shaft column 2 is made of laminated wood and has a substantially square cross section. The length of one piece of this cross section is set shorter than the long side of the cross section of the flat column 1 and longer than the short side of the flat column 1 .
The axial column 2 has an axial through-hole formed in its central portion, and a tendon 8 is inserted through the through-hole. A tension force is introduced into the tendon 8, and the upper end of the tendon 8 is fixed to the upper part of the shaft pillar 2 in the same manner as the tendon 7 fixed to the flat column 1, and the lower end is embedded in the concrete of the foundation 9 and fixed. there is

Like the shaft 2, the intermediate shaft 3 is made of laminated wood, has a substantially square cross-sectional shape, and is provided at a distance from the shaft 2. As shown in FIG. The position, number, etc., at which such intermediate shaft pillars 3 are arranged can be appropriately set based on the use, scale, and the like of the building. In the present embodiment, tension members 10 are also arranged along the axial direction of these intermediate shaft columns 3 , and a tension force is introduced so as to press the bottom surface toward the foundation 9 .

The beam 4 is made of laminated lumber, and the height and width of the beam can be appropriately determined according to the length of the span, the load to be applied, and the like. The structure that joins the ends of the beams 4 to the shaft column 2 or the intermediate shaft column 3 can be a structure mainly transmitting shear force or a structure transmitting shear force and bending moment. In a structure in which shear force is mainly transmitted, a beam bracket (not shown) is fixed to the shaft pillar 2 or the intermediate shaft 3, and the end of the beam 4 is connected to the beam bracket with a pin or the like. be able to. In addition, when the bending moment is transmitted between the end of the beam 4 and the shaft column 2 or the intermediate shaft column 3, a steel plate (not shown) is firmly fixed to the end of the beam, and the upper part of this steel plate and the A structure in which the lower part is fixed to the shaft pillar 2 or the intermediate shaft pillar 3 by bolts or the like can be adopted.

The floor structure 6 is composed of small beams, joists, floor boards, etc., which are supported between the beams 4, and the own weight of these and the load applied to the floor structure are mainly supported by the beams 4. It's becoming Also, it may be directly supported by the shaft pillar 2 or the intermediate shaft pillar 3, but it is not supported by the flat pillar 1, and relative vertical displacement between the flat pillar 1 and the floor structure 6 is allowed. It is supposed to be
The roof structure (not shown) is supported mainly by the upper beams 4a similarly to the floor structure, and is allowed to move relative to the flat column 1 in the vertical direction.

PC steel rods are used for the tendons 7 arranged along the flat column 1, and as shown in FIG. 4(a) or FIG. Two of them are arranged between two laminated lumbers 1a, 1a, and the upper end portion is fixed to the upper surface of the flat column 1 via a bearing plate 7a. Also, as shown in FIG. 5(b), the lower end is embedded in the concrete of the foundation 9 and fixed. These tendons 7 can be used by being connected at an intermediate portion, and can be used by connecting via a coupler 7b by operating from an opening 1b provided in the laminated material constituting the flat column 1. FIG.
Prestressed steel rods are also used for tendons 8 and 10 arranged along the shaft column 2 and the intermediate shaft column 3. It is

As shown in FIGS. 5(b) and 6, a base plate 12 is fixed to the lower ends of the flat column 1, the axial column 2 and the intermediate axial column 3, and a bearing plate 13 fixed to the upper surface of the foundation 9. A base plate 12 and a bearing plate 13 are joined together by joining bolts 14 . As shown in FIG. 6, the base plate 12 is attached to the flat column 1, the shaft 2 or the intermediate shaft 3 by an embedded bolt 15 which is embedded in the lower end of the flat shaft 1, the shaft 2 or the middle shaft 3 and bonded by an adhesive. It is fixed to the lower end of 3. Also, the bearing plate 13 is fixed to the upper surface of the foundation 9 by anchor bolts 16 embedded in the concrete of the foundation 9 .

As shown in FIG. 7, the structure for connecting the base plate 12 to the support plate 13 is to screw the joint bolts 14 into the bolt holes provided in the support plate 13 and tighten them. A cylindrical bolt receiving member 17 is interposed between the joint bolt head 14a and the base plate 12, and the length of the joint bolt 14 is increased to increase the amount of elongation when a tensile force acts. It is configurable.
The bolt receiving member 17 has a central hole 17a penetrating in the direction of the central axis line. screwed into the hole. The center hole 17a has an inner diameter slightly larger than the outer diameter of the connecting bolt 14. As shown in FIG.

A lower portion of the bolt receiving member 17 is fixed to the base plate by a lower fixing bolt 18 . A flange portion 14 b is provided on the head portion of the joint bolt 14 , and the flange portion 14 b is brought into contact with the upper surface of the bolt receiving member 17 . The head portion 14a of the joining bolt is fixed to the upper portion of the bolt receiving member 17 by an upper fixing bolt 19 via a flange portion 14b.

Since the base plate 12 is coupled to the bearing plate 13 in this manner, the base plate 12 is displaced so as to separate from the bearing plate 13 and float. is pressed against the bearing plate 13, a compressive force acts on the joint bolt 14. As shown in FIG. Since the inner diameter of the center hole 17a of the bolt receiving member 17 is slightly larger than the outer diameter of the connecting bolt, buckling of the connecting bolt 14 is suppressed.

8A and 8B are a plan view and a side view of a joining member 5 that joins the flat column 1 and the shaft column 2. FIG.
The joint member 5 is attached between the flat column 1 and the shaft column 2 which are erected with a space therebetween, and is fixed to both. are arranged at intervals of . These joint members 5 provide resistance to the relative vertical displacement of both columns and allow the relative displacement.
These joint members 5 are provided with two connecting members 31 respectively attached to the opposing side surfaces of both columns, and an intermediate plate 32 interposed between the two connecting members 31 connected to each other. .

Each of the connecting members 31 is formed by bending a steel plate, and includes an attachment portion 31a fixed to the side surface of the flat column 1 or the shaft column 2, and an upper end portion and a lower end portion of the attachment portion 31a. A protruding portion 31b that is bent along a substantially horizontal bending line and protrudes toward the opposed flat column 1 or the shaft pillar 2, and a bent portion that is bent from the tip of the protruding portion 31b so as to be substantially parallel to the mounting portion 31a. 31c and. The mounting portion 31a has a mounting surface along the side surface of the flat column 1 or the shaft column 2, and is provided with an insertion hole for the mounting bolt 33. As shown in FIG. Mounting bolts 33 inserted through these insertion holes can be screwed into bolt holes of a mounting board 34 fixed to the flat column 1 or the shaft column 2 to fix them.

The two connecting members 31 have two bent portions 31c opposed to each other at two upper and lower positions, and an intermediate plate 32 made of steel is sandwiched between the bent portions 31c so that the two connecting members 31 and one intermediate plate 32 are connected. They are connected by a plurality of connection bolts 35 . The intermediate plate 32 is a flat plate continuous between positions where the upper and lower bent portions 31c face each other. A steel plate having the same thickness as that of the connecting member 31 can be used for the intermediate plate 32, and a steel plate thicker than the connecting member 31 can also be used as a material that is less prone to bending deformation than the connecting member 31.

The mounting substrate 34 is fixed to the flat pillar 1 or the shaft pillar 2 by embedded bolts 36 coupled to the mounting substrate 34 . The mounting board 34 is provided with a plurality of bolt holes, and embedded bolts 36 are twisted into female threads formed on the inner peripheral surfaces of the bolt holes. The embedded bolt 36 is inserted into a bolt insertion hole provided in the flat column 1 or the shaft column 2 and fixed with an adhesive.

In such a wooden building structural frame, when a large horizontal force due to seismic motion acts, the lower ends of the flat columns 1 and the shaft columns 2 resist the bending moment with the foundation 9 as shown in FIG. Rotational displacement is allowed by elongation of the joint bolt 14 . Along with this, both the flat column 1 and the shaft column 2 are inclined, and the opposing side surfaces thereof are relatively displaced in the vertical direction. The joint member 5 that joins the flat column 1 and the shaft column 2 provides resistance to such relative displacement, prevents collapse, and the deformation of the joint member 5 maintains the safety of the structural framework. allow relative displacement within Therefore, the structural frame becomes a structure capable of resisting a large seismic force as a so-called flexible structure that can be flexibly deformed.
In addition, as indicated by arrow A in FIG. 9, a force in the direction of pressing the lower surface of flat column 1 and shaft column 2 against foundation 9 is acting due to the tension of tendons 7 and 8, and as indicated by arrow B in FIG. This force restores the inclination of the flat column 1 and the shaft column 2 when rotational displacement occurs so that the lower ends of the flat column 1 and the shaft column 2 are lifted on the tension side.

In the joint member 5, when a relative vertical displacement occurs between the flat column 1 and the shaft column 2, deformation occurs mainly in the two connecting members 31 as shown in FIG. When this deformation is within the elastic region, the elastic force imparts a restoring force to the flat column 1 and the shaft column 2 . In addition, when a large horizontal force such as an earthquake acts repeatedly and plastic deformation occurs in the joint member 5, the stress-strain history of the joint member 5 becomes a loop shape, and the energy is absorbed and the pillars and the structural framework including these pillars are formed. vibration can be damped.
It should be noted that deformation of the joint member 5 when relative displacement occurs between the flat column 1 and the shaft column 2 occurs mainly in the projecting portion 31b of the two connecting members as shown in FIG. At 32, a bending deformation that gently curves occurs. The intermediate plate 32 is sandwiched between and connected to the two connecting members 31 so as to maintain the orientation of the bent portion 31c substantially parallel to the mounting portion 31a of the connecting member. Therefore, a large bending deformation occurs in the overhanging portion 31b of the connecting member even in a region close to the bent portion 31c. As a result, the rigidity of the joining member 5 that resists the relative displacement between the flat column 1 and the shaft column 2 increases, and the amount of energy absorption increases when the deformation reaches the plastic region.

Such a joint member 5 may remain plastically deformed even after the action of the horizontal force is eliminated. In such a case, the joint member 5 can be replaced with a new one, making it easy to restore the state before the large load was applied.
The connecting member 31 of this joining member is fixed to the mounting board 34 by means of mounting bolts 33 screwed into screw holes of the mounting board 34. By extracting the mounting bolts 33, the two connecting members 31 and the intermediate plate 32 are integrated. It can be easily removed from the flat pillar 1 and the shaft pillar 2 while it is still intact. Then, the new joining member 5 is made by screwing the mounting bolts 33 into the bolt holes of the mounting plate 34 to both the flat column 1 and the shaft column 2 in a state in which the two connecting members 31 and the intermediate plate 32 are assembled in advance. Easy to install.

On the other hand, the floor structure 6 supported by the wooden building frame is mainly supported by the beams 4, the shaft pillars 2 and the intermediate shaft pillars 3, and the flat pillars 1 are assumed to bear almost no load from the floor structure 6. Become. Therefore, the flat column 1 can be strongly pressed against the foundation 9 by the tension force of the tendon 7 . As a result, the flat column 1 has a stable restoring force and contributes to the restoring force of the entire structural frame.
In addition, the floor structure 6 is capable of relative displacement in the vertical direction with respect to the flat column 1, and the flat column 1 and the shaft column 2 are tilted, causing relative displacement of their opposing side surfaces. Even if they do occur, the floor structure 6 will not experience a large shear force or bending moment, and excessive deformation will be avoided.

The wooden building structural skeleton described above and the joining member that can be suitably used in such a wooden building structural skeleton are embodiments of the present invention, and the present invention is not limited to the above embodiments. Instead, it can be carried out by appropriately changing the aspect within the scope of the present invention.

For example, in the wooden building structural frame shown in FIG. Both the shaft pillars and the intermediate shaft pillars can be provided inside the outer periphery of the building. Then, it is possible to construct a framework structure by connecting with a shaft pillar or an intermediate shaft pillar provided in the outer peripheral portion with a beam.
In addition, in the wooden architectural structure frame shown in FIG. A frame structure including 1, 3-2, 3-3 is connected with a small beam (not shown) or a floor structure and is not connected with a beam, but a shaft column or intermediate shaft column is installed inside the outer periphery It can also be provided to form a continuous framework structure.

In the wooden building structure shown in FIG. 1, the flat column 1 and the two shaft columns 2 facing the narrow side surface of the flat column are arranged such that the wide side surface of the flat column 1 faces the X direction or the Y direction. and each is distributed. However, the shaft column facing one flat column may face the narrow side surface of another flat column. For example, as shown in FIG. 11(a), the flat column 1-11 faces one side of the shaft column 2-11, and the narrower side of the other flat column 1-12 faces the opposite side. Two flat columns 1-11 and 1-12 can be arranged in series in the same direction. Also, as shown in FIG. 11(b), the narrow side surface of the other flat column 1-14 faces the side surface of the shaft column 2-12 facing the flat column 1-13 and the adjacent side surface, The two flat columns 1-13 and 1-14 can also be arranged so that the wide sides are perpendicular to each other.

Thus, the arrangement, number, etc. of the flat pillars, the shaft pillars, and the intermediate shaft pillars can be appropriately designed according to the scale of the building, the purpose of use, and the like. In addition, the cross-sectional shape, dimensions, etc. of these flat columns, shaft columns, intermediate shaft columns, and beams can be appropriately set. Furthermore, the structure for joining the flat column, the shaft column and the intermediate shaft column to the foundation is not limited to the structures shown in FIGS. 5, 6 and 7, and other forms can be adopted. However, in order to allow flexible deformation of the structural frame, the lower ends of the flat columns, shaft columns and intermediate shaft columns are capable of resisting the bending moment, and rotational displacement occurs so that the lower ends are lifted on the tension side. It is desirable to have a structure that allows for

On the other hand, the joining member that joins the flat column and the shaft column is not limited to the one shown in FIG. 8, and for example, the one shown in FIG. 12 can be employed.
This joining member 20 includes two connecting members 41, one intermediate plate 42, and a plurality of connecting bolts 45 for connecting them, like the one shown in FIG. The connecting member 41 has an attachment portion 41a, an overhanging portion 41b, and a bent portion 41c. projecting in a direction sloping toward In such a joint member 20, when the side surface of the flat column 21 and the side surface of the shaft column 22 that are opposed to each other are relatively displaced in the vertical direction, the projecting portion 41b of the connecting member 41 is compressed in the axial direction in the side shape. A force or tensile force is produced. Due to the bending moment and axial force generated in the overhanging portion 41b, the joining member 20 has a large rigidity against relative displacement between the flat column 21 and the shaft column 22 and resists deformation. . This rigidity is affected by the inclination angle of the projecting portion 41b. Therefore, it is possible to set the rigidity of the joining member 20 by setting the angle at which the projecting portion 41b projects.
Reference numeral 43 shown in FIG. 12 denotes a mounting bolt for the joint member, and reference numeral 44 denotes a mounting substrate for the joint member.
In addition, the joining member may be of another aspect, and may have a structure that resists relative displacement of the opposing side surfaces and permits relative displacement.

1: flat column, 2: shaft column, 3: intermediate shaft column, 4: beam, 4a: upper beam, 4b: lower beam, 5: joint member, 6: floor structure, 7: tendon, 8: tendon, 9: foundation, 10: tendon, 12: base plate, 13 bearing plate:, 14: joint bolt, 14a: head of joint bolt, 14b: flange of joint bolt, 15: embedded bolt, 16: anchor bolt , 17: bolt receiving member, 17a: center hole of bolt receiving member, 18: lower fixing bolt, 19: upper fixing bolt, 20: joining member, 21: flat column, 22: shaft column,
31: Connecting member 31a: Mounting portion 31b: Projecting portion 31c: Bent portion 32: Intermediate plate 33: Mounting bolt 34: Mounting substrate 35: Joining bolt 36: Embedded bolt
41: Connecting member 41a: Mounting portion 41b: Overhanging portion 41c: Bent portion 42: Intermediate plate 43: Mounting bolt 44: Mounting substrate 45: Joining bolt 46: Embedded bolt

Claims (11)

A flat pillar with a flat rectangular cross section in which the width of a pair of adjacent side surfaces is larger than that of the other pair of side surfaces, the flat pillar being erected on a foundation and made of wooden material;
A shaft pillar erected on the base and opposed to the narrow side surface of the flat pillar with a gap therebetween;
a beam supported at one end by the shaft column and supported substantially horizontally;
a prestressing tendon having a lower end anchored to the foundation and tensioning force applied to the tendon having an upper end anchored to the flat column;
The flat column and the shaft column allow relative vertical displacement between the side surface of the flat column and the side surface of the shaft column that face each other, and provide resistance to the relative displacement in the vertical direction. are joined by a joining member,
a floor structure supported by said beams or said axles;
A wooden building structural body, wherein the flat column allows relative displacement in the vertical direction with respect to the floor structure. The flat pillar continues to the height of the ceiling of the top floor,
2. The wooden building structural frame according to claim 1, wherein the distance between said shaft pillar and said flat pillar is maintained from the lower end to the upper end of said flat pillar. 3. The wooden building structural frame according to claim 1, wherein said joining member is made of metal and is elastically deformable, and is plastically deformable when a predetermined amount of deformation is exceeded. A plurality of the flat columns are provided,
4. The wooden building structural frame according to any one of claims 1 to 3, comprising a plurality of flat columns whose wide side surfaces are oriented in directions perpendicular to each other. Among the plurality of flat columns, the axial column facing the narrow side surface of the first flat column and the axial column facing the narrow side surface of the second flat column are bridged between them. Together with the beam or with an intermediate shaft pillar erected at a distance from the shaft pillar, and with the beam both ends of which are respectively supported by the shaft pillar or the intermediate shaft pillar, a framework structure is formed. The wooden building structural skeleton according to claim 4, characterized in that 6. The frame of a wooden building structure according to claim 5, wherein said framework structure is a Rahmen structure in which a bending moment is transmitted between a beam and a shaft pillar or an intermediate shaft pillar. One of the shaft columns has, on two or more side surfaces, a plurality of flat columns with wide side surfaces oriented in directions perpendicular to each other, or a plurality of flat columns with wide side surfaces oriented in the same direction. 5. The wooden building structural frame according to claim 4, wherein the wooden structural frame is joined via the joining member. A joining member made of metal that is fixed to both of two pillars that are erected with a space therebetween, and that provides resistance to relative displacement of both pillars in the vertical direction and permits the relative displacement. hand,
two connecting members respectively attached to opposite sides of both columns;
an intermediate plate interposed between the two connecting members coupled to each other;
each of the connecting members,
a plate-shaped mounting portion fixed to the side surface of the pillar;
an overhang portion that is bent by substantially horizontal bending lines of the upper end portion and the lower end portion of the mounting portion and projects toward the opposing pillar;
a bent portion that is bent from the tip of the overhanging portion so as to be substantially parallel to the mounting portion;
The two bending portions of both of the connecting members face each other at two upper and lower positions, and the intermediate plate, which is continuous between the upper and lower positions where the bending portions face each other, is sandwiched between the facing bending portions, A joining member, wherein both said bent portions are joined. A metal mounting substrate is secured to the side of the pillar,
9. The joining member according to claim 8, wherein the mounting portion is superimposed on the mounting board and fixed to the mounting board with mounting bolts. 10. The joining member according to claim 8, wherein the projecting portion projects from the mounting portion in a direction inclined toward the side surface of the opposing column. 11. The joining member according to any one of claims 8 to 10, wherein the intermediate plate is formed of a plate material that is thicker than the attachment portion, the projecting portion, and the bent portion.

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