JP4858836B2 - Vibration control pillar - Google Patents

Description

  The present invention relates to a seismic control stud that is provided as a stud between upper and lower beams of a building and functions as a damper during an earthquake or the like.

As this type of seismic control pillar, for example, one disclosed in Patent Document 1 is common. As schematically shown in FIG. 8, the intermediate column 3 is installed inside the frame constituted by the left and right columns 1 and the upper and lower beams 2, and, for example, a yield of steel material is provided at the intermediate portion of the intermediate column 3. Which incorporates a damper 4 to obtain an energy absorption effect by the above, and when a horizontal force such as an earthquake or wind acts on this frame to cause interlayer deformation, the damper 4 is operated to obtain a vibration damping effect It is.
In the past, when installing a damper on the frame of a building, it was most common to install a brace or wall in the frame and incorporate the damper into it, but the damper 4 was incorporated into the stud 3 as described above. If it is installed in the form, the required space is small, and it is possible to secure large openings on both sides, so there are fewer restrictions on the installation place than when installing in the form of braces or walls There are advantages.
JP 2004-150188 A

However, since the conventional seismic control column as shown in Patent Document 1 is such that the inter-column 3 is divided at the center and the damper 4 is arranged there, the deformation of the entire seismic control column is illustrated in FIG. As shown in FIG. 8 (b), a large deformation is generated such that it concentrates on the damper 4 and bends at the center of the floor height.
Therefore, when the finishing material 5 such as a partition wall or an outer wall curtain wall is attached to such a seismic control column, it is necessary to consider the damage prevention of the finishing material 5 due to a large deformation at the center of the floor. Conventionally, it is generally necessary to secure a sufficient clearance 6 between the intermediate pillar 3 and the finishing material 5 or to provide a complicated deformation absorbing mechanism and a deformation following mechanism, and between the intermediate pillar 3 and the surrounding finishing material 5. The meeting and the payment of the product had to be complicated.

  In view of the above circumstances, the present invention not only provides a sufficient seismic control effect, but also an effective control that can suppress deformation during operation of the damper and simplify the engagement and storage with the finishing material attached to the periphery. The purpose is to provide the structure of seismic columns.

  According to the first aspect of the present invention, when the upper and lower ends are rigidly joined to the upper and lower beams, respectively, between the upper and lower beams of the building, and interlayer deformation occurs between the upper and lower beams. A seismic control column that functions as a damper and absorbs vibration energy, and is made of a steel material that yields due to layer shear force between the upper and lower ends of the main body made of steel or either one of the ends and the beam. A damper member having a panel is interposed, and the damper member is rigidly joined to the beam, and the end of the stud main body is pin-joined to the damper member at two positions spaced in the vertical direction. It is characterized by that.

  According to a second aspect of the present invention, in the damping pillar of the first aspect, the damper member is made of H-shaped steel, and the proximal end of the H-shaped steel as the damper member is welded to the beam to be rigidly joined. Thus, the web functions as a shear panel, and the stud main body is composed of a pair of groove steels sandwiching the H-shaped steel web as the damper member from both sides, and ends of the groove steel as the stud pillar main body. The part is formed by pin-joining the web or flange of the H-shaped steel at two locations, that is, the base and the tip of the H-shaped steel as the damper member.

  According to a third aspect of the present invention, in the vibration-damping stud according to the first aspect, the main body is made of H-shaped steel, and the damper member is a pair of damper units that sandwich the web at the end of the main body from both sides. The damper unit includes a shear panel that is in close contact with an H-shaped steel web serving as a stud main body, and a stiffening frame integrally provided around the shear panel, and the damper unit is attached to the stiffening frame. The steel plate is rigidly connected to the beam by bolting to the beam, and the ends of the H-shaped steel as the stud main body are connected to the shear panel of the damper unit at two locations of the base portion and the tip portion of the damper unit. It is characterized by being pin-bonded to the stiffening frame.

According to the seismic control stud of the present invention, the damper member having the shear panel yielding by shear deformation is interposed between the end of the stud main body and the beam, so when the interlayer deformation occurs, the yield of the shear panel In addition to being able to obtain the seismic control effect of, the deformation of the end of the seismic interphase column only occurs, and the main body of the intermediary column itself is slightly tilted relative to the vertical without undergoing large shearing or bending deformation. Stay on. Therefore, the large deformation that bends in the middle part of the floor height unlike the conventional seismic control columns does not occur intensively, and as a result, the mating and fitting with finishing materials such as partition walls and outer wall curtain walls are simplified. Can be realized.
In addition, since the joint between the end portion of the stud body and the damper member is pin-joined at two places spaced vertically, the shear stress transmitted from the stud body to the shear panel is expanded by the lever principle. Even if the shear deformation is small, the absorbed energy becomes large and an excellent vibration control effect is obtained.

1st Embodiment of the seismic control pillar of this invention is described with reference to FIGS.
The seismic control pillar 10 of the first embodiment is installed in the form of a stud between the upper and lower beams 2 inside the frame constituted by the left and right pillars 1 and the upper and lower beams 2, and is a steel material. The main point is that the damper members 12 are interposed between the upper and lower ends of the stud main body 11 and the upper and lower beams 2.

  The detail of the structure for joining the upper end part of the stud main body 11 with respect to the upper beam 2 is shown in FIGS. Although the detailed illustration and description are omitted, the entire seismic control column 10 is vertically symmetric, and the lower end of the main column body 11 is joined to the lower beam 2 with the same structure as the upper side. It has been broken.

As shown in FIGS. 2 to 3, in the first embodiment, H-shaped steel is used as the damper member 12, and the base end (upper end in FIGS. 2 to 3) of the damper member 12 is the beam 2. It is directly welded and rigidly joined.
The H-shaped steel as the damper member 12 is such that the web 12b is arranged parallel to the frame surface, and the web 12b yields in-plane by the layer shear force acting on the frame and exhibits an energy absorption effect. Therefore, it is preferable that at least the web 12b as the shear panel of the material of the H-shaped steel as the damper member 12 is a low yield point steel or an extremely low yield point steel.
In addition, it is preferable to weld the reinforcing rib 13 to the side part of the beam 2 at a position corresponding to the flange 12a of the H-shaped steel as the damper member 12.

  As the stud main body 11, a pair of groove steels that sandwich an H-shaped steel web 12 b (that is, a shear panel) as the damper member 12 from both sides are used. The pair of grooved steels as the stud main body 11 are connected to each other by a binding bolt 15 through spacers 14 at appropriate positions (for example, three places as shown in FIG. 1), and the ends thereof are used as the damper member 12. While the H-shaped steel web 12b is sandwiched, it is fastened and joined to the base part and the tip part of the damper member 12 by the shearing force transmission bolts 16, respectively. The structure shown is substantially pin-bonded.

  That is, the joining of the stud main body 11 to the base portion and the distal end portion of the damper member 12 is performed by bolt fastening with a plurality of (five in the illustrated example) shear force transmission bolts 16 arranged in one horizontal row. However, the bolt hole for that purpose is a loose hole that is long in the vertical direction except for the one located at the center. Further, as shown in FIG. 2, the flange 12a of the H-shaped steel as the damper member 12 and the flange 11a of the groove-shaped steel as the intermediate column main body 11 are not in contact with each other, and a slight clearance is secured there. The tip of the channel steel as the main body 11 and the beam 2 are not in contact with each other, and a slight clearance is secured there. Thus, in each of the two bolt fastening locations, the in-plane relative rotation between the damper member 12 and the stud main body 11 is possible, and the joining type at such individual bolt fastening locations is substantially structurally It can be regarded as a pin joint.

However, although the individual joints are pin joints, the end portions of the stud main body 11 are joined to the damper member 12 at two locations at intervals in the vertical direction, so that relative rotation is restricted as a whole. After all, the stud main body 11 and the damper member 12 are joined in the form of a rigid joint capable of transmitting a shearing force.
Therefore, when a layer shear force acts on the frame and an interlayer deformation occurs between the upper and lower beams 2, the layer shear force is applied to the damper member 12 from the stud main body 11 via the shear force transmission bolt 16. When the web 12b as the shear panel is subjected to a predetermined shearing force, the shear yielding precedes the stud body 11 and the beam 2 and, as a result, exhibits an excellent energy absorption effect. It has become.

In the seismic control column 10 of the first embodiment, the upper and lower end portions of the stud main body 11 are rigidly joined to the upper and lower beams 2 via the damper members 12 as described above. When an interlayer deformation occurs between the upper and lower beams 2 as shown in b), the web 12b as a shear panel in the upper and lower damper members 12 shears and yields, and the intermediate column body 11 undergoes a large shear deformation or bending deformation. Without falling, it will just fall down with a slight tilt with respect to the vertical.
Accordingly, in this seismic control column 10, as shown in FIG. 8, the middle portion of the intermediary column 3 is divided and a damper 4 is provided there. Large deformation does not concentrate, and even if the finishing material 5 such as a partition wall or an outer wall curtain wall is attached to the vibration control column 10, a large relative deformation may occur between the column main body 11 and the finishing material 5. Absent. Therefore, it is not necessary to ensure a large clearance between the damping column 10 and the finishing material 5 as in the past, or to provide a complicated deformation absorbing mechanism and a deformation following mechanism. The payment can be greatly simplified.

Moreover, by adopting a joining form in which the end portion of the stud main body 11 and the damper member 12 are joined by pinning with the shearing force transmission bolts 16 at two positions at intervals in the vertical direction as described above, The shear stress transmitted from 11 to the damper member 12 is expanded and transmitted by the “lever principle”, whereby an efficient energy absorption effect is obtained.
That is, as shown in FIG. 1 (c), if the distance to the center of the beam 2 and the stud body 11 is L, the distance between the pin joint of the two positions was set to L _B, the vibration control stud 10 shear force Q acting on the installation the Frame is transmitted enlarged in L / _{L B} times the damper member 12, the shear stress _{Q B} that acts on the damper member 12 and the _{Q B = Q · L / L} B Become.

If the shear stress generated in the damper member 12 is increased and increased as described above, the absorbed energy can be increased even if the shear deformation generated in the web 12b as the shear panel is reduced. It is possible to obtain a sufficient seismic control effect while suppressing the vibration.
Note that the stress is enlarged transmitted by the principle of leverage, so changes the setting of the position of the pin junction of the two positions (i.e. setting the value of the above L, L _B), by setting them properly It is possible to set an optimum magnitude of shear stress to be enlarged and transmitted to the shear panel (web 12b).

Although the first embodiment has been described above, for example, the following modifications can be considered in the first embodiment.
In the first embodiment, the damper member 12 is interposed between the upper and lower ends of the stud body 11 and the upper and lower beams 2, but the damper member 12 is not necessarily interposed between the upper and lower ends. For example, as shown in FIG. 4, the damper member 12 is interposed only at the upper end of the stud body 11 and omitted at the lower end, and the lower end of the stud body 11 is It may be simply rigidly connected to the side beam 2. Of course, conversely, the damper member 12 may be interposed only at the lower end portion of the stud body 11 and omitted at the upper end portion.

In the first embodiment, the H-shaped steel web 12b as the damper member 12 functions as a shear panel, and the grooved steel web 11b as the stud body 11 is directly joined to the web 12b. However, instead of this, as shown in FIG. 5, the flanges 11a and 12a on both sides may be pin-joined by the shearing force transmission bolt 16 via the spacer 17, or at two locations. One of the pins may be joined by pin joining between the webs 11b and 12b, and the other may be joined by pin joining between the flanges 11a and 12a.
In any case, the type of joining of the stud main body 11 to the damper member 12 is to perform relative rotation at each joining point by pin-joining with two shearing bolts 16 at two places spaced apart vertically. As long as the joint is allowed to be rigid, the relative rotation is restricted, and the shearing force can be expanded and transmitted. As long as this is adopted, any joining type can be adopted.
When the flanges 11a and 11b are joined to each other as described above, the web 12b (shear panel) of the damper member 12 and the web 11b of the stud body 11 are simply spell bolts 15 as shown in FIG. You only have to spell.

  Furthermore, in the above-described embodiment, the pin joints at two locations are each performed by a plurality of (five in the illustrated example) shear force transmission bolts 16 arranged in a horizontal row, and the bolt holes for that are allowed to rotate relative to each other. Therefore, it is necessary to use a loose hole, but instead of this, as shown in FIG. Of course, only one of the two locations may be pin-joined by a plurality of shear force transmission bolts 16 and the other may be pin-joined by a single shear force transmission pin 18.

Next, with reference to FIG. 7, the seismic control pillar 20 of 2nd Embodiment is demonstrated.
The seismic control stud 20 of the second embodiment uses H-shaped steel as the stud main body 21 and a pair of damper units 23 as the damper member 22.
The damper unit 23 as the damper member 22 includes a shear panel 23b that is arranged in parallel with the frame surface and is in close contact with the H-shaped steel web 21b as the stud main body 21, and an auxiliary unit integrally provided around the shear panel 23b. The damper unit 23 is composed of a rigid frame 23 a, and a stiffening frame 23 a at the upper part of the shear panel 23 b is bolted to the beam 2 by a joining bolt 24, and the damper unit is rigidly joined to the beam 2.
Then, the upper portion of the shear panel 23b and the web 21b of the stud body 21 are sandwiched from both sides by the pair of damper units 23 rigidly joined to the beam 2 so as to sandwich the H-shaped steel web 21b as the stud body 21 from both sides. Are connected to each other by bolting with a shearing force transmission bolt 16, and a stiffening frame 23a provided at the lower part of the shearing panel 23b and a reinforcing rib 25 provided on the H-shaped steel as the intermediate column main body 21 are used to transmit the shearing force. The pins are joined by bolt fastening with bolts 16.

  Also in the second embodiment, the end portion of the stud main body 21 is pin-joined to the damper member 22 at two locations as in the first embodiment, and relative rotation is allowed at each joint location, and as a whole The relative rotation is constrained and the shearing force is transmitted from the stud main body 21 to the shearing panel 23b in an enlarged manner by the “lever principle”, and therefore the same effect as in the first embodiment can be obtained.

Also in the second embodiment, the modification in the case of the first embodiment as shown in FIGS. 4 to 6 can be similarly applied.
In other words, the damper member 22 may be provided on either or both of the upper end and the lower end of the stud main body 21, and the H-shaped steel flange 21 a as the stud main body 21 and the auxiliary provided on the side of the damper unit 23. The rigid frame 23a can be pin-joined at two locations on one side by bolting with the shear force transmission bolt 16, and both or one of the two pin joints can be replaced with the shear force transmission bolt 16 and shear force. It may be performed by the transmission pin 18.

  Furthermore, the present invention is not limited to the first to second embodiments described above, and includes a structure for rigidly joining the damper member to the beam, including a specific configuration of the stud main body and the damper member. It goes without saying that various arrangements and applications of the seismic control pillar arrangement plan in the frame are possible without departing from the scope of the present invention.

It is a figure which shows the state which installed the damping pillar which is 1st Embodiment of this invention. It is a figure which shows the junction part of a seismic control column and a beam. It is a figure which shows an assembly state same as the above. It is a figure which shows a modification similarly. It is a figure which shows another modification as same as the above. It is a figure which shows another modification as same as the above. It is a figure which shows the assembly state of the seismic control pillar which is 2nd Embodiment of this invention. It is a figure which shows an example of the conventional general vibration control pillar.

Explanation of symbols

1 Pillar 2 Beam 5 Finishing material 10 Damping stud 11 Pillar body (channel steel)
11a Flange 11b Web 12 Damper member (H-shaped steel)
12a Flange 12b Web (shear panel)
DESCRIPTION OF SYMBOLS 13 Reinforcement rib 14 Spacer 15 Spell bolt 16 Shear force transmission bolt 17 Spacer 18 Shear force transmission pin 20 Seismic control pillar 21 Interstitial pillar main body (H-shaped steel)
21a flange 21b web 22 damper member 23 damper unit 23a stiffening frame 23b shear panel 24 joint bolt 25 reinforcing rib

Claims (3)

It is provided as a pillar between the upper and lower beams of the building, and the upper and lower ends are rigidly connected to the upper and lower beams, respectively. When an interlayer deformation occurs between the upper and lower beams, it functions as a damper to provide vibration energy. A seismic control column that absorbs,
A damper member having a shear panel made of steel that yields due to layer shearing force is interposed between the upper and lower ends of either of the steel pillar main bodies made of steel and either of the ends and the beam, and the damper member is attached to the beam. A seismic control pillar characterized by being rigidly joined and pin-joining the end of the stud body to the damper member at two places spaced apart in the vertical direction. A seismic control pillar according to claim 1,
The damper member is made of H-shaped steel, and the web functions as a shear panel by welding the proximal end of the H-shaped steel as the damper member to the beam and rigidly joining it.
The stud main body is composed of a pair of grooved steels that sandwich the H-shaped steel web as the damper member from both sides,
The ends of the grooved steel as the stud main body are pin-bonded to the H-shaped steel web or flange at two locations, the base and the tip of the H-shaped steel as the damper member, respectively. The seismic control pillar. A seismic control pillar according to claim 1,
The stud body is made of H-shaped steel, and the damper member is composed of a pair of damper units that sandwich the web at the end of the stud body from both sides.
The damper unit comprises a shear panel that is in close contact with an H-shaped steel web as a stud body, and a stiffening frame that is integrally provided around the shear panel,
The damper unit is rigidly joined to the beam by bolting the stiffening frame to the beam, and the ends of the H-shaped steel as the stud main body are connected to the base and the tip of the damper unit. A seismic control column characterized by being pin-connected to a shear panel or a stiffening frame of the damper unit at a location.

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