JP2004225309A - Building structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building structure which is inexpensive and can be easily constructed and replaced for enhancing the earthquake resistance of the structure and controlling vibration. <P>SOLUTION: A preyielding member 5 is installed at the end of a butter brace 7 put in the joint between a column 1 and a beam 3. The main body 8 of the butter brace 7 is made of an ordinary steel and the preyielding member 5 is made of a material with a lower yield point than the main body 8 of the butter brace 7, a low-yield point steel for instance. The main body 21 of the preyielding member 5 has an arched shape and arranged to form a space 39 between the surfaces of the column 1 and the beam 3. The preyoeld member 5 is fixed to the column 1 or the beam 3 through a mounting member 25, and also fixed to a mounting hardware 17 of the butter brace 7 through a mounting member 27. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a building structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, braces and cross sticks have been used to improve the earthquake resistance of a portal-shaped structure having columns and beams. In addition, a viscoelastic damper or an oil damper may be provided on a part of the brace to dampen the structure (for example, see Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP 2002-276074 A [Patent Document 2]
Japanese Patent Application Laid-Open No. 2000-320179
[Problems to be solved by the invention]
However, when bracing is installed on a wall surface, installation positions of windows and the like are limited. In addition, when a viscoelastic damper or an oil damper is used, installation and replacement work becomes complicated.
[0005]
The present invention has been made in view of such a problem, and an object of the present invention is to provide an inexpensive building that is easy to install and replace in order to improve the seismic resistance of the structure and perform vibration suppression. It is to provide structure.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a first invention in which a brace is installed near a beam-column joint of a structure, and a leading yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace. It is a building structure characterized by being provided in a section.
[0007]
In order to cause the preceding yield member to yield before the brace when a load is applied, (1) the brace is made of ordinary steel, and the preceding yield member is made of a material having a lower yield point than that of ordinary steel. The material having a lower yield point than ordinary steel is a low yield point steel or another material having a lower yield point, such as lead, aluminum, or copper.
[0008]
Alternatively, (2) by making the sectional area of the preceding yielding member smaller than the sectional area of the brace, it is possible to make the preceding yielding member yield before the brace. Further, (3) the preceding yielding member may be formed in a shape that is more easily deformed out of plane than the brace. The shape easily deformed out-of-plane includes a box-like shape, a hollow hemispherical shape, and an arch-like shape in which a space is formed between a column or a beam and a main body.
[0009]
The preceding yielding member is installed at one end or both ends of the pole or beam side of the brace. When the preceding yielding member is provided at one end of the stick, the other end of the leading yielding member and the stick is fixed to the structure. When the preceding yield members are provided at both ends of the brace, the preceding yield members are fixed to the structure. Various attachment members are used as necessary for fixing the preceding yield member and the brace. The joint between the brace or the preceding yielding member and the structure is located at 0.05A to 0.45A from the closest column-beam joint, with A as the length of one section of the beam or column on which the brace is installed. Is done.
[0010]
In the first invention, a brace is installed in the vicinity of a beam-column joint of a building, and a preceding yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace. When installing the fore member and the preceding yield member on the structure, the fore member having the preceding yield member installed on both ends or one end is installed on the beam. Alternatively, after the preceding yielding member has been installed on the column and beam, a brace may be installed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an elevation view of a column 1 and a beam 3. The columns 1 and the beams 3 are, for example, steel structures, reinforced concrete structures, and wooden structures. As shown in FIG. 1, a brace 7 is provided at a joint between the column 1 and the beam 3. The brace 7 includes a main body 8 and mounting hardware 17 (FIG. 2) provided at both ends. A leading yielding member 5 is provided at an end of the brace 7.
[0012]
When the length 9 of one section of the beam 3 is L, the distance 11 between the installation position of the advance yielding member 5 provided at the end of the beam 3 on the beam 3 side and the center of the column 1 is 0.05L to 0L. .45 L is preferable. When the length 13 of one section of the pillar 1 is H, the distance 15 between the installation position of the preceding yielding member 5 provided at the end of the brace 7 on the pillar 1 side and the center of the beam 3 is 0.05H. To 0.45H.
[0013]
2 is an elevation view near the joint between the column 1 and the beam 3, FIG. 3 is an elevation view near the junction between the advance yielding member 5 and the brace 7, and FIG. 4 is a perspective view of the advance yielding member 5. Is shown. FIG. 2 is an enlarged view of a portion shown in FIG. FIG. 3 is a diagram viewed from the direction indicated by arrow B in FIG.
[0014]
As shown in FIGS. 2 and 3, mounting hardware 17 provided at both ends of the main body 8 of the brace 7 is a member for joining the main body 8 and the preceding yielding member 5, and has a bolt hole (see FIG. 2). (Not shown). The material of the main body 8 of the brace 7 is, for example, ordinary steel. The cross section of the main body 8 has an arbitrary shape, for example, a rectangular shape, a circular shape, an H shape, or the like.
[0015]
As shown in FIGS. 3 and 4, the preceding yield member 5 includes a main body 21, a mounting member 25, a mounting member 27, and the like. The main body 21 is obtained by bending a rectangular plate-like member into an arch shape having a semicircular cross section. The material of the main body 21 of the preceding yield member 5 is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like having a low yield point.
[0016]
The mounting member 25, which is the first mounting member, is provided on the side end 33 of the arch of the main body 21 along the axial direction of the arch, that is, the direction shown by the arrow D in FIG. The attachment member 25 has a bolt hole 23. The attachment member 25 is a member for attaching the preceding yield member 5 to the column 1 or the beam 3.
[0017]
A mounting member 27 as a second mounting member is provided along a direction indicated by an arrow D in a central portion 31 which is a top of an arch of the main body 21. The attachment member 27 has a bolt hole 29. The attachment member 27 is a member for attaching the cane 7 to the preceding yield member 5.
[0018]
As shown in FIGS. 2 and 3, in order to fix the preceding yield member 5 to the beam 3 (column 1), the mounting member 25 is brought into contact with the beam 3 (column 1), and the bolt hole 23 of the mounting member 25 is fixed. , And tighten it with the nut 35. Further, in order to fix the brace 7 to the preceding yielding member 5, the mounting hardware 17 is overlapped with the mounting member 27, and the bolt holes 29 of the mounting member 27 and the bolt holes (not shown) of the mounting hardware 17 are provided. , And tighten it with the nut 19. A space 39 is formed between the main body 21 of the preceding yield member 5 and the beam 3 (column 1).
[0019]
When the staff 7 and the preceding yield member 5 are installed on the beam 3 (column 1), the staff 7 with the preceding yield member 5 fixed to both ends or one end is fixed to the beam 3 (column 1). Alternatively, after the preceding yielding member 5 is fixed to the beam 3 (post 1), the brace 7 may be fixed to the preceding yielding member 5.
[0020]
As described above, the preceding yield member 5 is formed of a low yield point steel or the like having a lower yield point than the main body 8 of the brace 7. The low yield point steel yields reliably at a low set load, and is excellent in plastic deformation and repeated deformation performance. When the load is applied to the brace 7 by using the low yield point steel as the preceding yield member 5, the main body 21 of the preceding yield member 5 moves out of the plane before the main body 8 is deformed, that is, in the direction of arrow C in FIG. Deforms in the direction shown and absorbs energy. In the out-of-plane deformation, large plastic deformation can be obtained with a small member, and large energy can be absorbed.
[0021]
As described above, in the present embodiment, the architectural structure is configured by using the brace 7 provided with the preceding yield member 5 at the end. Thereby, the structure can be damped. Also, it may be used for seismic reinforcement.
[0022]
The conventional brace-type damper blocks a window formed on a wall surface surrounded by the column 1 and the beam 3, but in the present embodiment, as described with reference to FIG. The distance 11 from the center of the column 1 is 0.05L to 0.45L, the distance 15 between the installation position of the preceding yielding member 5 and the center of the beam 3 is 0.05H to 0.45H. By installing the shorter staff 7, the degree of freedom in the position of the window is increased, and the material cost of the staff 7 is reduced.
[0023]
In the present embodiment, when the original function is lost after a large earthquake or the like, only the preceding yielding member 5 is replaced. Since the preceding yield member 5 is small and is joined to the column 1, the beam 3, and the cane 7 with bolts, replacement is easy.
[0024]
In the present embodiment, the preceding yielding member 5 is installed at both ends of the staff 7, but may be installed only at one end of the staff 7. In this case, the other end of the brace 7 is directly fixed to the column 1 or the beam 3.
[0025]
Further, the shape of the preceding yield member 5 is not limited to those shown in FIGS. Below, the example of the preceding yield member of another shape is shown. FIG. 5 shows a perspective view of the preceding yield member 5a. The preceding yield member 5a includes a main body 21a, a mounting member 25a, a mounting member 27a, and the like. The main body 21a is obtained by curving a rectangular plate-like member into a home-base arch shape in cross section. The material of the main body 21a is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0026]
The mounting member 25a, which is the first mounting member, is provided at the arch side end 33a of the main body 21a along the axial direction of the arch. The attachment member 25a has a bolt hole 23a. The mounting member 27a, which is the second mounting member, is provided along the axial direction of the arch at the central portion 31a, which is the top of the arch of the main body 21a. The attachment member 27a has a bolt hole 29a.
[0027]
FIG. 6 shows a perspective view of the preceding yield member 5b. The preceding yield member 5b includes a main body 21b, a mounting member 25b, a mounting member 27b, and the like. The main body 21b is obtained by curving a rectangular plate-like member into an arch shape having a triangular cross section. The material of the main body 21b is a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0028]
The mounting member 25b, which is the first mounting member, is provided along the axial direction of the arch at the side end 33b of the arch of the main body 21b. The attachment member 25b has a bolt hole 23b. The mounting member 27b, which is the second mounting member, is provided along the axial direction of the arch at a central portion 31b that is the top of the arch of the main body 21b. The attachment member 27b has a bolt hole 29b.
[0029]
7 and 8 show perspective views of the preceding yield member 5c and the preceding yield member 5d, respectively. As shown in FIG. 7, the preceding yield member 5c includes a main body 21c, a mounting member 25c, a mounting member 27c, and the like. As shown in FIG. 8, the preceding yielding member 5d includes a main body 21d, a mounting member 25d, a mounting member 27d, and the like.
[0030]
The main body 21c and the main body 21d are obtained by curving a rectangular plate-like member into an arch shape having a rectangular cross section. The material of the main body 21c and the main body 21d is a material having a lower yield point than the main body 8 of the brace 7, for example, low yield point steel, lead, aluminum, copper, or the like. The main body 21c has a fixed member thickness as shown in FIG. 7, and the main body 21d has the thickness of the member of the main body 21c changed linearly and curvedly as shown in FIG.
[0031]
In the preceding yield member 5c, the mounting member 25c, which is the first mounting member, is provided on the arch side end 33c of the main body 21c along the axial direction of the arch. The attachment member 25c has a bolt hole 23c. The mounting member 27c, which is the second mounting member, is provided along the axial direction of the arch at the central portion 31c that is the top of the arch of the main body 21c. The attachment member 27c has a bolt hole (not shown).
[0032]
In the preceding yield member 5d, a mounting member 25d, which is a first mounting member, is provided on the side end 33d of the arch of the main body 21d along the axial direction of the arch. The attachment member 25d has a bolt hole 23d. The attachment member 27d as the second attachment member is provided along the axial direction of the arch at a central portion 31d which is the top of the arch of the main body 21d. The attachment member 27d has a bolt hole (not shown).
[0033]
FIG. 9 shows a perspective view of the preceding yield member 5e. The preceding yield member 5e includes a main body 21e, a mounting member 25e, a mounting member 27e, and the like. The main body 21e is obtained by bending a rectangular plate-like member into a hollow hemisphere. The material of the main body 21e is, for example, a material having a lower yield point than the main body 8 of the brace 7, and is, for example, low yield point steel, lead, aluminum, copper, or the like.
[0034]
The mounting member 25e, which is the first mounting member, is provided on the hemispherical side end 33e of the main body 21e along the circumferential direction of the hemisphere. The attachment member 25e has a bolt hole 23e. The mounting member 27e, which is the second mounting member, is provided at a central portion 31e that is the top of the hemisphere of the main body 21e. The attachment member 27e has a bolt hole 29e.
[0035]
The preceding yield members 5a, 5b, 5c, 5d, 5e are fixed to the beam 3 and the column 1 via the bolt holes 23a, 23b, 23c, 23d, 23e of the mounting members 25a, 25b, 25c, 25d, 25e. You. In addition, it is fixed to the main body 8 of the stick 7 via bolt holes 29a, 29b, 29e of the mounting members 27a, 27b, 27c, 27d, 27e.
[0036]
In the case of using the preceding yield members 5a, 5b, 5c, 5d, and 5e, when a load is applied to the brace 7, the main body 21a of the preceding yield members 5a, 5b, 5c, 5d, and 5e is deformed before the brace 7 is deformed. , 21b, 21c, 21d, 21e are deformed in the out-of-plane direction to absorb energy. In the building structure using the brace 7 having the preceding yield members 5a, 5b, 5c, 5d, and 5e at the ends, the same effect as the building structure using the brace 7 having the preceding yield member 5 at the end is obtained. can get.
[0037]
The shapes of the attachment member 25 and the attachment member 27 of the preceding yield member 5, the number of the bolt holes 23 and the bolt holes 29, and the structure for fixing the brace 7 to the pillar 1 and the beam 3 are shown in FIGS. However, the present invention is not limited to the above. FIG. 10 is an elevational view of the vicinity of the joint between the column 1 and the beam 3 when the brace mounting member 43 is used. In FIG. 10, the preceding yielding member 5 is fixed to the column 1 or the beam 3 via the brace mounting member 43.
[0038]
The installation position of the brace 7 is not limited to the position shown in FIG. FIG. 11 is an elevational view of the pillar 1 and the beam 3 when the brace is installed on the floor side. In FIG. 1, the brace 7 is installed on the ceiling side of the section surrounded by the pillars 1 and the beams 3, but as shown in FIG. 11, it is installed on the floor side of the section surrounded by the columns 1 and the beams 3. Is also good. Moreover, you may install in both the ceiling side and the floor side.
[0039]
Also in this case, in order to reduce the amount of material used for the brace 7 and increase the degree of freedom in the installation position of the window, the installation position of the advance yielding member 5 provided at the end of the brace 7 on the beam 3 side is determined. The distance 11 from the center of the pillar 1 is 0.05L to 0.45L (L is the length 9 of the beam 3), and the installation position and beam of the leading yielding member 5 provided at the pillar 1 side end of the brace 7 It is preferable that the distance 15 from the center of 3 be 0.05H to 0.45H (H is the length 13 of the column 1).
[0040]
In FIGS. 1 to 10, the preceding yield member 5 is formed of a material different from that of the main body 8 of the brace 7, but the preceding yield member 5 may be made of the same material as the main body 8. When the brace 7 and the preceding yield member 5 are formed of the same material, the cross section of the end of the brace 7 may be smaller than the cross section of the main body 8 to form the preceding yield member 5.
[0041]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide an inexpensive building structure that is easy to install and replace because the seismic resistance of the structure is improved and vibration is suppressed.
[Brief description of the drawings]
FIG. 1 is an elevation view of a pillar 1 and a beam 3 FIG. 2 is an elevation view of a vicinity of a junction between a pillar 1 and a beam 3 FIG. FIG. 4 is a perspective view of a preceding yield member 5 FIG. 5 is a perspective view of a preceding yield member 5a FIG. 6 is a perspective view of a preceding yield member 5b FIG. 7 is a perspective view of a preceding yield member 5c FIG. FIG. 9 is a perspective view of a leading yielding member 5e. FIG. 10 is an elevation view near a joint between a column 1 and a beam 3. FIG. 11 is an elevation view of a column 1 and a beam 3.
1 ... pillar 3 ... beams 5, 5a, 5b, 5c, 5d, 5e ... preceding yield member 7 ... stick 9 ... length of beam 3 ... length of pillar 1 S17 Mounting hardware 21, 21a, 21b, 21c, 21d, 21e Main body 25, 25a, 25b, 25c, 25d, 25e, 27, 27a, 27b, 27c, 27d, 27e Mounting Parts

Claims (5)

An architectural structure wherein a brace is installed in the vicinity of a beam-column joint of a structure, and a preceding yielding member that yields earlier than the brace when a load is applied is provided at an end of the brace. The architectural structure according to claim 1, wherein the preceding yield member is made of a material having a lower yield point than the brace. The architectural structure according to claim 1, wherein the preceding yield member is formed in a shape that is more easily deformed out of plane than the brace. The building structure according to claim 3, wherein the shape that is easily deformed out of plane is a box shape, a hollow hemispherical shape, an arch shape, or the like in which a space is formed between the pillar or the beam. When the length of one section of a column or a beam on which the brace is installed is A, the preceding yielding member is provided at a position of 0.05A to 0.45A from the closest column-beam joint. The building structure according to any one of claims 1 to 4, wherein:

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