JP2015017371A - Buckling stiffening brace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight of a buckling stiffening brace.SOLUTION: A buckling stiffening brace includes: a brace material which is obliquely attached to a frame of a structure; a stiffening member which is provided on an outer or inner periphery of the brace material to suppress buckling of the brace material; and force transmission means which has one end attached to the frame, which has the another end connected in a relatively movable manner to the stiffening member, and which transmits a tensile force to the stiffening member without transmitting a compressive force to the stiffening member.

Description

  The present invention relates to a buckling stiffening brace attached to a frame of a structure.

  A seismic technology for increasing the seismic resistance of a structure by installing a shaft-shaped member such as a shape steel or a round steel as a brace material on a structure frame has been put into practical use. In addition, braces that can bear both tensile force and compressive force have been proposed. For example, Patent Document 1 discloses a buckling stiffening brace composed of a steel pipe as a stiffening cylinder and an H-shaped steel as a brace material inserted into the steel pipe.

  However, when a large compressive force is to be borne by such a buckling stiffening brace, the structural cross section of the steel pipe or H-shaped steel must be increased, and the buckling stiffening brace becomes heavy.

JP 2008-19631 A

  This invention considers the fact which concerns, and makes it a subject to aim at weight reduction of a buckling stiffening brace.

  According to the first aspect of the present invention, there is provided a brace material that is obliquely attached to a frame of a structure, a stiffening member that is provided on an outer periphery or an inner periphery of the brace material to suppress buckling of the brace material, and one end portion of which A force transmission means attached to the frame, the other end of which is connected to the stiffening member so as to be relatively movable, a compressive force is not transmitted to the stiffening member, and a tensile force is transmitted to the stiffening member; It is a buckling stiffening brace.

  In the invention according to claim 1, the brace material and the stiffening member to which the tensile force is transmitted by the force transmitting means bear the tensile force acting on the buckling stiffening brace. The brace material bears a compressive force acting on the buckling stiffening brace and is buckled and stiffened by the stiffening member to exhibit a high compressive strength.

  Moreover, since the brace material can improve a compressive yield strength by buckling stiffening by a stiffening member, the structural cross section of a brace material can be made small. Furthermore, since the two members of the brace material and the stiffening member bear the tensile force acting on the buckling stiffening brace, the tensile strength required for the brace material can be reduced. Therefore, the structural cross section of the brace material can be reduced. In addition, since the compressive force is not transmitted to the stiffening member by the force transmitting means, the stiffening member does not need to bear the compressive force acting on the buckling stiffening brace and has a resistance against the protruding load of the brace material. In addition, it is sufficient that the brace material has rigidity enough to prevent the brace material from protruding. Therefore, the structural cross section of the stiffening member can be made smaller than that of the stiffening member designed to bear the compressive force. Accordingly, it is possible to reduce the weight of the buckling stiffening brace.

  According to a second aspect of the present invention, in the buckling stiffening brace according to the first aspect, the brace material is an axial member, and the stiffening member is a cylindrical member into which the brace material is inserted. And the force transmission means is provided at the end of the stiffener member with a tubular body having one end attached to the frame and the other end provided with an engaged portion, and a tensile force applied to the brace material. And an engaging portion that engages with the engaged portion when acting, and separates from the engaged portion when a compressive force acts on the brace material.

  In the invention according to claim 2, since the stiffening member is arranged outside the brace material, the structural cross section of the stiffening member can be made larger than when the stiffening member is arranged inside the brace material, High bending rigidity of the stiffening member can be secured.

  Since the present invention is configured as described above, it is possible to reduce the weight of the buckling stiffening brace.

It is an elevation view which shows the buckling stiffening brace which concerns on embodiment of this invention. It is a sectional side view which shows the other end part of the buckling stiffening brace which concerns on embodiment of this invention. It is a sectional side view which shows the one end part of the buckling stiffening brace which concerns on embodiment of this invention. It is a sectional side view which shows the one end part of the buckling stiffening brace which concerns on embodiment of this invention. It is a diagram which shows the axial force with respect to the displacement of the buckling stiffening brace which concerns on embodiment of this invention. It is a sectional side view which shows the one end part of the buckling stiffening brace which concerns on embodiment of this invention. It is a diagram which shows the axial force with respect to the displacement of the buckling stiffening brace which concerns on embodiment of this invention. It is a perspective view which shows the force transmission means which concerns on embodiment of this invention. It is a sectional side view which shows the force transmission means which concerns on embodiment of this invention. It is a perspective view which shows the force transmission means which concerns on embodiment of this invention. It is a sectional side view which shows the force transmission means which concerns on embodiment of this invention. It is a perspective view which shows the force transmission means which concerns on embodiment of this invention. It is a sectional side view which shows the force transmission means which concerns on embodiment of this invention. It is a sectional side view which shows the other end part of the buckling stiffening brace which concerns on embodiment of this invention. It is a sectional side view which shows the one end part of the buckling stiffening brace which concerns on embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. First, a buckling stiffening brace according to an embodiment of the present invention will be described.

  In the front view of FIG. 1, two buckling stiffening braces 14 are shown symmetrically installed on the column beam frame 12 of the structure 10. The structure 10 is a steel structure building, and the column beam frame 12 is formed by a steel column 16 and a steel beam 18. The buckling stiffening brace 14 includes a shaft-shaped member 20 as a brace material, a cylindrical member 22 as a stiffening member, and force transmission means 24.

  As shown in FIG. 2 in which the upper end portion of the buckling stiffening brace 14 is enlarged, a male screw portion 26 </ b> A is formed at the upper end portion of the shaft-like member 20. Then, the upper end portion of the shaft-like member 20 is fixed to the fixing member 28A by screwing the male screw portion 26A into the female screw hole 30A formed on the substantially central axis of the fixing member 28A and tightening the nut 32A for preventing loosening. Has been.

  As shown in FIG. 3, in which the lower end portion of the buckling stiffening brace 14 is enlarged, a male screw portion 26 </ b> B is formed at the lower end portion of the shaft-like member 20. Then, the lower end portion of the shaft-like member 20 is fixed to the fixing member 28B by screwing the male screw portion 26B into the female screw hole 30B formed on the substantially central axis of the fixing member 28B and tightening the nut 32B for preventing loosening. Has been.

  The fixing members 28A and 28B are steel cylindrical members, and are provided with connecting members 34A and 34B at the ends. The connecting member 34A is provided on the fixing member 28A so as not to rotate with respect to the central axis of the fixing member 28A, and the connecting member 34B is provided on the fixing member 28B so as to be rotatable with respect to the central axis of the fixing member 28B. Yes. In the following description, the end of each member on the connecting member 34B side is referred to as “one end”, and the end of each member on the connecting member 34A side is referred to as “other end”.

  As shown in FIG. 1, the shaft-like member 20 is obliquely attached to the column beam frame 12 by connecting connecting members 34 </ b> A and 34 </ b> B with pins 40 to gusset plates 36 and 38 provided on the column beam frame 12. It is attached.

  As shown in FIGS. 2 and 3, the cylindrical member 22 is a steel round tube, and has a slight gap between the inner wall surface of the inner hole 42 and the outer peripheral surface of the shaft-shaped member 20, The shaft-like member 20 is inserted and disposed in the inner hole 42. That is, the cylindrical member 22 is provided on the outer periphery of the shaft-shaped member 20. Thereby, buckling of the shaft-shaped member 20 can be suppressed.

  As shown in FIG. 2, the other end of the cylindrical member 22 is connected to the fixing member 28 </ b> A via a connecting pipe 44. The connecting pipe 44 is a steel bottomed cylindrical pipe, and the shaft-like member 20 is inserted into a through hole 48 formed on a substantially central axis of a bottom 46 provided at one end.

  A female screw hole 50 that is concentric with the through hole 48 and has a diameter larger than that of the through hole 48 is formed in the bottom 46. Then, the other end portion of the cylindrical member 22 is fixed to the connection pipe 44 by screwing and tightening the male screw portion 52 formed at the other end portion of the cylindrical member 22 into the female screw hole 50.

  The connecting pipe 44 is screwed with a male threaded portion 56 formed on the outer peripheral surface of the fixing member 28A into a female threaded hole 54A formed on the inner peripheral surface of the other end of the connecting pipe 44, and a nut 58A for preventing loosening. By fixing, the fixing member 28A is fixed.

  The force transmission means 24 is provided on the lower end side of the buckling stiffening brace 14 as shown in FIG. 1, and as shown in FIG. 3, the adjustment pipe 60 as a tubular body and the outer periphery as an engaging part. It has a flange 62 and an inner peripheral flange 64 as an engaged portion.

  The adjusting tube 60 is a steel cylindrical tube, and a male screw portion 56B formed on the outer peripheral surface of the fixing member 28B is screwed into a female screw hole 54B formed on the inner peripheral surface of one end portion of the adjusting tube 60. The fixing member 28B is fixed by tightening a locking nut 58B. Further, an inner peripheral flange 64 made of steel projecting inward in the radial direction is integrally provided at the other end of the adjustment pipe 60.

  The cylindrical member 22 is inserted into a through hole 66 formed by the inner peripheral surface of the inner peripheral flange 64, and an outer peripheral flange 62 made of steel that projects outward in the radial direction is provided at one end of the cylindrical member 22. It is provided integrally.

  The outer peripheral flange 62 is disposed on one end side (fixing member 28B side) of the adjustment pipe 60 with respect to the inner peripheral flange 64, and engages with the inner peripheral flange 64 when a tensile force T acts on the shaft-shaped member 20. However, when the compressive force P acts on the shaft-like member 20, it is separated from the inner peripheral flange 64. That is, the force transmission means 24 has one end attached to the column beam frame 12 and the other end connected to the tubular member 22 so as to be relatively movable, and the compressive force P is not transmitted to the tubular member 22 but is pulled. T constitutes a mechanism for transmitting to the cylindrical member 22.

  The buckling stiffening brace 14 shown in FIGS. 1 to 3 is installed on the column beam frame 12 by the following method, for example. First, after inserting the cylindrical member 22 into the through hole 66 of the adjustment tube 60, the male screw portion 52 of the cylindrical member 22 is screwed into the female screw hole 50 and tightened to connect the other end portion of the cylindrical member 22 to the connecting tube 44. To fix.

  Next, after inserting the shaft-shaped member 20 into the inner hole 42 of the cylindrical member 22, the male screw portion 26A is screwed into the female screw hole 30A of the fixing member 28A, and the nut 32A for preventing loosening is tightened, thereby fixing the fixing member. The upper end portion of the shaft-like member 20 is fixed to 28A, and the male screw portion 26B is screwed into the female screw hole 30B of the fixing member 28B. At this time, as shown in the side sectional view of FIG. 4, the lower end portion of the shaft-like member 20 is not fixed to the fixing member 28 </ b> B, and the central axis of the shaft-like member 20 is the rotation axis with respect to the shaft-like member 20. Thus, the fixing member 28B can be rotated.

  Next, the connecting members 34 </ b> A and 34 </ b> B are connected to the gusset plates 36 and 38 provided on the column beam frame 12 with pins 40, respectively. Adjustment of the length from the center of the pin hole 68A of the connecting member 34A to the center of the pin hole 68B of the connecting member 34B causes the fixing member 28B to rotate with respect to the shaft-shaped member 20 with the central axis of the shaft-shaped member 20 as the rotation axis. By doing.

  Next, the fixing member 28 </ b> B is rotated with respect to the shaft-shaped member 20 with the central axis of the shaft-shaped member 20 as a rotation axis so that the shaft-shaped member 20 is lightly tensioned. In this state, the locking nut 32B is tightened to fix the lower end of the shaft member 20 to the fixing member 28B.

  Next, the male threaded portion 56A of the fixing member 28A is screwed into the female threaded hole 54A of the connecting pipe 44, and the loosening prevention nut 58A is tightened to fix the connecting pipe 44 to the fixing member 28A.

  Next, the male screw portion 56B of the fixing member 28B is screwed into the female screw hole 54B of the adjustment tube 60, and the adjustment tube 60 is rotated with the central axis of the fixing member 28B as the rotation axis, thereby adjusting the fixing member 28B. The pipe 60 is moved to the lower end side in the central axis direction of the fixing member 28B, and the outer peripheral flange 62 is engaged (contacted) with the inner peripheral flange 64.

  Further, by rotating the adjustment tube 60 with the central axis of the fixing member 28B as the rotation axis, the cylindrical member 22 is lightly tensioned. In this state, the nut 58B for preventing loosening is tightened to fix the adjustment tube 60 to the fixing member 28B. Thereby, the buckling stiffening brace 14 is installed on the column beam frame 12.

  Next, the operation and effect of the buckling stiffening brace according to the embodiment of the present invention will be described.

  In the buckling stiffening brace 14 of the present embodiment, as shown in FIGS. 1 to 3, the shaft-like member 20 and the cylindrical member 22 to which a tensile force is transmitted by the force transmitting means 24 are composed of a buckling stiffening brace. The tensile force acting on 14 is borne. The shaft member 20 bears a compressive force acting on the buckling stiffening brace 14 and is buckled and stiffened by the tubular member 22 to exhibit a high compressive strength.

  The graph of FIG. 5 shows the displacement of the buckling stiffening brace 14 when the buckling stiffening brace 14 is installed on the column beam frame 12 with the outer peripheral flange 62 engaged (contacted) with the inner peripheral flange 64. A value 70 of the axial force (y-axis) acting on the buckling stiffening brace 14 with respect to (x-axis) is shown. The positive side (right side from 0) of the x-axis is an extension displacement, and the negative side (left side from 0) of the x-axis is a contraction displacement. Further, the positive side (upper side of 0) of the y-axis is a tensile force, and the negative side (lower side of 0) of the y-axis is a compressive force.

  As indicated by a value 70, when a tensile force acts on the buckling stiffening brace 14, the shaft member 20 and the cylindrical member 22 are elastically deformed (value 72 is a value for only the cylindrical member 22 at this time). After the shaft member 20 yields at the yield point 74, the shaft member 20 absorbs energy while plastically deforming. Further, when a compressive force is applied to the buckling stiffening brace 14, the shaft member 20 is elastically deformed, and after the shaft member 20 yields at the yield point 76, the shaft member 20 absorbs energy while plastically deforming. .

  Moreover, as shown in FIGS. 1-3, since the shaft-shaped member 20 can improve compression yield strength by buckling stiffening by the cylindrical member 22, the structure cross section of the shaft-shaped member 20 can be made small. .

  Furthermore, since the two members of the shaft-shaped member 20 and the cylindrical member 22 bear the tensile force acting on the buckling stiffening brace 14, the tensile strength required for the shaft-shaped member 20 can be reduced. Therefore, the structural cross section of the shaft-shaped member 20 can be reduced.

  Further, since the compressive force is not transmitted to the cylindrical member 22 by the force transmission means 24, the cylindrical member 22 does not need to bear the compressive force acting on the buckling stiffening brace 14, and the shaft member 20 protrudes. Rigidity that can withstand the load and suppress the protrusion of the shaft-shaped member 20 (for example, when the stiffening member is a cylindrical member as in this embodiment, the shaft-shaped member 20 It is only necessary to have such a rigidity that the outer peripheral wall of the stiffening member can be prevented from being deformed to the outside as it protrudes. Therefore, the structural cross section of the cylindrical member 22 can be made smaller than the stiffening member designed to bear the compressive force.

  As described above, the buckling stiffening brace 14 of the present embodiment can reduce the structural cross section of the shaft-like member 20 as the brace material and the cylindrical member 22 as the stiffening member. 14 can be reduced in weight. Such a light weight buckling stiffening brace 14 can be used particularly effectively for light buildings, low-rise buildings, buildings where uneven settlement is a problem, and the like.

  Further, in the buckling stiffening brace 14 of the present embodiment, the cylindrical member 22 as the stiffening member is arranged outside the shaft-like member 20 as the brace material, so that the stiffening member is arranged inside the brace material. The structural cross section of the cylindrical member 22 can be made larger than that, and the high bending rigidity of the cylindrical member 22 can be ensured.

  Furthermore, since the buckling stiffening brace 14 of this embodiment can bear both a tensile force and a compressive force, it is essential to dispose two buckling stiffening braces 14 in an X shape or in a bilaterally symmetrical manner. Not a condition.

  Further, as shown in FIG. 3, the buckling stiffening brace 14 of this embodiment has a buckling stiffening brace attached to the column beam frame 12 in a state where the outer peripheral flange 62 is engaged (contacted) with the inner peripheral flange 64. Since 14 is installed, when a tensile force is applied to the buckling stiffening brace 14, the tubular member 22 can be immediately loaded with this tensile force.

  The embodiment of the present invention has been described above.

  In the present embodiment, as shown in FIG. 1, an example in which the force transmission means 24 is provided on the lower end side of the buckling stiffening brace 14 is shown. Means 24 may be provided. For example, you may provide in the upper end part side of a buckling stiffening brace 14, or a material axial direction center part. A plurality of force transmission means 24 may be provided on the buckling stiffening brace 14.

  Moreover, in this embodiment, as shown in FIG. 3, the example which installed the buckling stiffening brace 14 in the column beam frame 12 in the state which made the outer peripheral flange 62 engage (contact) with the inner peripheral flange 64 was shown. However, as shown in the side sectional view of FIG. 6, in a state where a gap is provided between the opposing surfaces of the inner peripheral flange 64 and the outer peripheral flange 62 (the opposing surfaces of the inner peripheral flange 64 and the outer peripheral flange 62 are separated). A buckling stiffening brace 14 may be installed on the column beam frame 12. In this case, since the initial stiffness of the buckling stiffening brace 14 with respect to the tensile force can be suppressed, for example, at the initial stage where the tensile force acts on the buckling stiffening brace 14, other dampers provided on the frame are attached. Can function.

  In the graph of FIG. 7, the buckling stiffening brace 14 when the buckling stiffening brace 14 is installed on the column beam frame 12 with a gap provided between the opposing surfaces of the inner peripheral flange 64 and the outer peripheral flange 62 is shown. A value 78 of the axial force (y axis) acting on the buckling stiffening brace 14 with respect to the displacement (x axis) is shown. The positive side (right side from 0) of the x-axis is an extension displacement, and the negative side (left side from 0) of the x-axis is a contraction displacement. Further, the positive side (upper side of 0) of the y-axis is a tensile force, and the negative side (lower side of 0) of the y-axis is a compressive force.

  As indicated by a value 78, when a tensile force is applied to the buckling stiffening brace 14, the shaft member 20 is elastically deformed (value 80 is a value for only the cylindrical member 22 at this time), and a yield point 82 is obtained. After the shaft member 20 yields, the shaft member 20 absorbs energy while plastically deforming. The initial stiffness of the buckling stiffening brace 14 (the slope of the value 78 from 0 to the yield point 82) is smaller than the value 70 of FIG. 5 by the amount that the initial stiffness of the cylindrical member 22 is not added. Further, when a compressive force is applied to the buckling stiffening brace 14, the shaft member 20 is elastically deformed, and after the shaft member 20 yields at the yield point 84, the shaft member 20 absorbs energy while plastically deforming. .

  Furthermore, in this embodiment, as shown in FIGS. 2 and 3, the shaft-shaped member is formed in the inner hole 42 so as to have a slight gap between the inner wall surface of the inner hole 42 and the outer peripheral surface of the shaft-shaped member 20. Although the example which inserted and arrange | positioned 20 was shown, even if the clearance gap between the inner wall face of the inner hole 42 and the outer peripheral surface of the shaft-shaped member 20 exists if the buckling of the shaft-shaped member 20 can be suppressed. There is no need. Further, a cushioning material may be provided between the inner wall surface of the inner hole 42 and the outer peripheral surface of the shaft-shaped member 20. As the buffer material, materials such as rubber, synthetic resin, and mortar can be used. If a cushioning material is provided between the inner wall surface of the inner hole 42 and the outer peripheral surface of the shaft-shaped member 20, a stiffening effect can be exerted when the amount of deflection of the shaft-shaped member 20 is small.

  Further, in the present embodiment, as shown in FIG. 3, the force transmission means 24 has an adjustment pipe 60 as a tubular body, an outer peripheral flange 62 as an engaging part, and an inner peripheral flange 64 as an engaged part. The force transmission means has one end attached to the column beam frame, the other end connected to the stiffening member so as to be relatively movable, and the compressive force is transmitted to the stiffening member. However, it is only necessary to constitute a mechanism for transmitting the tensile force to the stiffening member. For example, the force transmission means 86, 88, and 90 shown in FIGS.

  As shown in the perspective view of FIG. 8 and the side sectional view of FIG. 9, in the force transmission means 86, the inner wall surface 96 at the other end of the elongated hole 92 formed in the adjustment tube 60 as the tube body is engaged. A pin member 94 that penetrates through the long hole 92 and is screw-joined at one end of the cylindrical member 22 is used as the engaging portion.

  In the force transmission means 86, when a tensile force T acts on the shaft-shaped member 20, the pin member 94 engages with the inner wall surface 96 at the other end of the long hole 92 (the pin is fixed to the inner wall surface 96 at the other end of the long hole 92. When the compression force P acts on the shaft-shaped member 20, the pin member 94 moves to the central axial direction fixing member 28 </ b> B side (the right side in FIG. 9) of the adjustment tube 60 and the other end of the elongated hole 92. Separated from the inner wall surface 96 of the part.

  As shown in the perspective view of FIG. 10 and the side sectional view of FIG. 11, the force transmission means 88 is configured to include an adjustment tube 60 as a tubular body and a pin member 98 as a connecting member.

  One end of the adjustment tube 60 is fixed to the fixing member 28B by screw joining, and an outer peripheral flange 100 that projects outward in the radial direction is integrally provided at the other end of the adjustment tube 60. In addition, an outer peripheral flange 102 that projects outward in the radial direction is integrally provided at one end of the cylindrical member 22.

  Then, the pin member 98 is passed through the through hole 104 formed in the outer peripheral flange 100 and the through hole 106 formed in the outer peripheral flange 102, and a gap G is provided between the opposing surfaces of the outer peripheral flange 100 and the outer peripheral flange 102. In this state, head members 108 are attached to both ends of the pin member 98 so that the gap G does not become larger. That is, the end portion of the cylindrical member 22 is constituted by the pin member 98 as a connecting member provided at the end portion (outer peripheral flange 102) of the cylindrical member 22 and the end portion (outer peripheral flange 100) of the adjustment pipe 60. The (outer peripheral flange 102) and the end portion (outer peripheral flange 100) of the adjustment pipe 60 are connected so as to be relatively movable in the axial direction of the shaft-shaped member 20.

  With such a configuration, when the tensile force T acts on the shaft member 20, the pin member 98 connects the end portion (outer peripheral flange 102) of the cylindrical member 22 and the end portion (outer peripheral flange 100) of the adjustment pipe 60. When the compression force P is applied to the shaft-shaped member 20, the one end portion (the outer peripheral flange 102) of the cylindrical member 22 and the other end portion (the outer peripheral flange 100) of the adjustment pipe 60 are relatively moved within the gap G. (The connection by the pin member 98 is released).

  As shown in the perspective view of FIG. 12 and the side cross-sectional view of FIG. 13, the force transmission means 90 is configured such that the connecting member is a bottomed cylindrical member 110 and the other configuration is the same as that of the force transmission means 88. The bottomed cylindrical member 110 is configured by integrally providing inner peripheral flanges 114 and 116 projecting radially inward at both ends of the cylindrical portion 112.

  Furthermore, in this embodiment, as shown in FIGS. 1-3, although the example which provided the stiffening member (cylindrical member 22) in the outer periphery of the brace material (axial member 20) was shown, the side cross section of FIG. As shown in the cross-sectional views of FIGS. 15 and 15, a buckling supplementary rigid brace 118 having a stiffening member provided on the inner periphery of the brace material may be used. In the buckling supplementary rigidity brace 118, the shaft member 124 as a stiffening member is inserted into the inner hole 122 of the tubular member 120 as a brace material, and the other end of the adjustment tube 60 is the tubular member 120. Are joined to one end of the cylindrical member 120 and integrated with the cylindrical member 120. Thereby, the cylindrical member 120 is buckled and stiffened by the shaft-shaped member 124.

  As shown in FIG. 14, the other end of the shaft-shaped member 124 is fixed to the fixing member 28A. Further, as shown in FIG. 15, the force transmission means 126 has a through-hole 128 formed substantially on the central axis of the fixing member 28B and one end of the shaft-shaped member 124 facing the central axis of the fixing member 28B. In this state, the head member 130 is attached to one end of the shaft-like member 124 so as to be movable. The head member 130 is accommodated in an accommodating portion 132 formed in the fixing member 28 </ b> B in communication with the through hole 128.

  With this configuration, when the tensile force T acts on the tubular member 120, the head member 130 hits the inner wall surface 134 of the housing portion 132, and when the compressive force P acts on the tubular member 120, the head member 130 The fixing member 28B moves to the central axial direction connecting member 34B side (the right side in FIG. 15) and moves away from the inner wall surface 134 of the accommodating portion 132.

  Moreover, in this embodiment, as shown in FIG.2 and FIG.3, although the example which used the brace material as the shaft-shaped member 20 was shown, in the case of the structure which provides a stiffening member in the outer periphery of a brace material, a brace material is shown. May be a shaft-shaped member having the required tensile strength and compression strength. For example, a brace material may be a steel wire such as a PC steel wire, a steel rod such as a PC steel rod, a steel pipe, an H-shaped steel or an L-shaped steel. It is good also as shape steels. In the case of providing a stiffening member on the inner periphery of the brace material, the brace material may be a cylindrical member having the required tensile strength and compression strength. For example, the brace material may be a round tube or a square tube. It is good also as a steel pipe. If the brace material is made of low yield point steel, it can absorb the energy when a tensile force or a compressive force is applied to the brace material, and can exert a damping effect.

  Further, in this embodiment, as shown in FIGS. 2 and 3, an example in which the stiffening member is a cylindrical member 22 has been shown. However, in the case where the stiffening member is provided on the outer periphery of the brace material, the stiffening member is provided. The rigid member may be a cylindrical member having a predetermined tensile strength and a strength and rigidity that suppresses the brace material from protruding. For example, the stiffening member may be a steel tube such as a round tube or a square tube. In the case of a configuration in which a stiffening member is provided on the inner periphery of the brace material, the stiffening member may be a shaft-shaped member having a predetermined tensile strength and a strength and rigidity that suppresses the brace material from protruding. The rigid member may be a steel wire such as a PC steel wire, a steel rod such as a PC steel rod, a steel pipe, or a shape steel such as an H-shaped steel or an L-shaped steel. If the stiffening member is made of ultra high strength steel, the tensile strength of the stiffening member can be improved.

  Furthermore, in the present embodiment, as shown in FIG. 1, an example in which two buckling stiffening braces 14 are arranged symmetrically on the column beam frame 12 has been shown, but buckling stiffening arranged on the column beam frame 12 is shown. Any number of braces 14 may be used, and the braces 14 may not be arranged symmetrically. The buckling stiffening braces 14 are preferably arranged symmetrically. In this way, even if a shear force acts on the column beam frame 12 from either the left or right direction, the total shear strength can be imparted to the column beam frame 12 as a total.

  Further, the buckling stiffening brace 14 of the present embodiment may be used in a newly built building or may be installed in a building renovation work.

  Furthermore, in the present embodiment, an example in which the structure 10 is a steel structure building is shown. However, the buckling stiffening brace 14 of the present embodiment is a reinforced concrete structure, a steel structure, a steel reinforced concrete structure, a CFT structure (Concrete- Filled Steel Tube (Filled Steel Tube Concrete Structure) and their mixed structures can be applied to buildings of various structures and sizes.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

10 Structure 12 Pillar beam frame (frame)
14, 118 Buckling stiffening brace 20 Shaft-shaped member (brace material)
22 Cylindrical member (stiffening member)
24, 86, 88, 90, 126 Force transmission means 60 Adjustment pipe (tube)
62 Outer peripheral flange (engagement part)
64 Inner flange (engaged part)
94 Pin member (engagement part)
96 Inner wall (engaged part)
120 Cylindrical member (brace material)
124 Shaft-shaped member (stiffening member)
T Tensile force P Compressive force

Claims (2)

Brace material that is attached diagonally to the frame of the structure;
A stiffening member provided on the outer periphery or inner periphery of the brace material to suppress buckling of the brace material;
One end portion is attached to the frame, the other end portion is connected to the stiffening member so as to be relatively movable, a compression force is not transmitted to the stiffening member, and a tensile force is transmitted to the stiffening member. When,
Buckling stiffening brace. The brace material is a shaft-shaped member,
The stiffening member is a cylindrical member into which the brace material is inserted,
The force transmission means is
A tubular body having one end attached to the frame and having an engaged portion at the other end;
Provided at the end of the stiffening member, engages with the engaged portion when a tensile force acts on the brace material, and separates from the engaged portion when a compressive force acts on the brace material An engaging portion;
The buckling stiffening brace according to claim 1, comprising:

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