JP6382656B2 - Friction bolt joint structure and building - Google Patents

Description

  The present invention relates to a friction bolt joint structure and a building that can be assembled, disassembled and used repeatedly.

  As a conventional friction bolt joint structure of a building frame, there is one described in Patent Document 1 (see FIG. 2, paragraphs 0014 to 0016), and beam joint pieces made of split tees on both flanges of a pillar made of H-shaped steel. And a T-shaped reinforcing piece were joined with high-strength bolts, and beams made of H-shaped steel were joined to the upper and lower beam-joining pieces with high-strength bolts. Also, on both sides of the pillar web, reinforcing plates are overlapped and the angle members are joined with high-strength bolts. It was. Furthermore, in the center of the reinforcing plate, a cross beam T-shaped piece is joined with a high-strength bolt.

  The columns and beams have a thin zinc rich paint coating on the entire surface, and other frame components, such as beam joint pieces, T-shaped reinforcement pieces, reinforcement plates, angle members, reinforcement pieces, and beam joint pieces, In addition, a zinc rich paint film was provided thick on the entire surface to obtain a practically sufficient slip coefficient.

JP-A-5-222777

  However, in a building frame having a practically sufficient slip coefficient as in Patent Document 1, it is not considered to be disassembled and repeatedly used, and therefore, the constituent members are to be discarded at the time of disassembly.

  In view of the above circumstances, the present invention provides a friction bolt joint structure and a building that can be used repeatedly.

  The invention according to claim 1 is applied to a column beam joint where a long column member arranged along the vertical direction and a long beam member arranged along the horizontal direction are joined. In the friction bolt joint structure, a plate-like joint projecting along the short direction of the column member is disposed at the end in the longitudinal direction of the column member, and at the end in the longitudinal direction of the beam member. The bonded portion to be bonded to the bonded portion is disposed, the bonded surface of the bonded portion to the bonded portion and the bonded surface of the bonded portion to the bonded portion are formed as flat surfaces, and the bonded portion and the bonded portion And the column member is pivotally supported with respect to the beam member at the joint portion so as to be rotatable, and on the joint surface between the joint portion of the joint portion and the joint portion of the joint portion. In the area where the zinc rich paint is applied and the zinc rich paint is applied, the high strength bolt More, the joint portion and the joint is fastened.

  According to this, due to the friction and bearing pressure by the friction processing of applying the zinc rich paint which is used for fastening with high-strength bolts and rust-proofing treatment and can be easily obtained to the joint surface between the joint portion and the joint portion. The energy absorbing function is improved, and the proof stress of the joined portion between the joined portion and the joined portion can be improved.

  Therefore, the strength of the joint portion between the joint portion and the joint portion and the column members and beam members around the joint portion can be ensured, so that it can be used repeatedly.

  In addition, since the column member is pivotally supported and foldable with respect to the beam member at the joint, it can be disassembled, folded and compacted for transportation and storage, and assembled repeatedly. Contributes to use.

  Then, after disassembly, the zinc rich paint is peeled off and applied again, so that a friction bolt joint structure can be obtained that maintains proof strength and can withstand repeated use.

  Furthermore, since it joins with the beam at the joint protruding from the column member, the setting position of the high strength bolt, the application area of the zinc rich paint, etc. are set by changing the joint without changing the size of the pillar material. be able to.

In addition, at least three high-strength bolts are used, as viewed from the rotation axis direction of the column member, on the side away from the column member of the joint and the central side in the longitudinal direction of the column member, and the column member of the joint The polygonal shape is arranged at least one by one in a region on the near side and near the end in the longitudinal direction of the pillar member, and on a region near the pillar member in the joint and on the central side in the longitudinal direction of the pillar member. It is arranged to be.

  Even with such a configuration, the effect of the first aspect can be obtained. It can be said that this is a range that can be expanded from the results of the tests conducted by the applicant and the common general knowledge based on the results.

In addition, a substantially rectangular flat plate is used for the joining portion, and the corner portion on the side farther from the column member and closer to the end in the longitudinal direction of the column member as viewed from the rotation axis direction of the column member is cut off and formed. The high-strength bolt is seen from the direction of the axis of rotation of the column member. The line connecting each high-strength bolt is along the column member on one side, and the other side is perpendicular to the column member. The right-angled portion is arranged so as to form a substantially right-angled triangle located on the column member side where the joint portion is disposed, and on the outer side of the substantially right-angled triangle surrounded by high-strength bolts and on the center side in the longitudinal direction of the column member. When the pivot axis of the column member is arranged and the column member is folded with respect to the beam member, the corner cut portion is the pivot axis of the column member when the joined portion and the joined portion are joined. It is formed so as not to protrude from the beam member when viewed from the direction.

  According to this, when the column member is folded with respect to the beam member, the joint portion does not protrude from the beam member, so that a dead space can be eliminated during transportation and storage during assembly and disassembly. In general, four high-strength bolts are often joined, but the present applicant has made it possible to assemble, disassemble and repeatedly use the three-strength bolts with the above-described configuration. It is made clear by the test results.

Invention of Claim 2 is a building provided with a ceiling unit, a floor unit, and a wife unit, and the wife unit connects a pair of vertical columns and the upper and lower ends of each vertical column, respectively. A plate-like upper joint that protrudes along the short direction of the vertical column is disposed at the upper end of the vertical column. Further, upper joint portions to be joined to the upper joint portion are disposed at both ends in the longitudinal direction of the beam of the ceiling unit, respectively, and the joint surface with the upper joint portion of the upper joint portion and the upper joint portion of the upper joint portion. The joint surface is formed in a flat surface, and the upper joint portion and the upper joint portion are arranged to overlap each other, and the vertical column is pivotally supported with respect to the beam of the ceiling unit at the upper joint portion. Zinc Rich Paint is applied to the joint surface between the upper joint portion of the upper joint portion and the upper joint portion of the upper joint portion. Are fabrics, in the area where zinc-rich paint is applied, the high-strength bolts, the upper bonding portion and the upper bonding portion is fastened.

  According to this, the frame constituting the wife unit is made into a rectangular frame to increase the rigidity, and the zinc-rich paint that is used for fastening with high-strength bolts and used for rust prevention treatment can be easily obtained. By the friction process of applying to the joint surface with the part, the energy absorption function by friction and supporting pressure is improved, and the proof stress of the joint part between the upper joint part and the upper joint part can be improved.

  Accordingly, the strength of the joint portion between the upper joint portion and the upper joint portion, and the vertical columns and beams around the joint portion can be ensured, so that it can be used repeatedly.

  In addition, since the vertical column is pivotally supported and foldable with respect to the beam at the upper joint, it can be disassembled, folded and compacted for transportation and storage, and assembled repeatedly. Contributes to use.

  Then, after disassembly, the zinc rich paint is peeled off and applied again, so that a friction bolt joint structure can be obtained that maintains proof strength and can withstand repeated use.

  In addition, since the vertical column is pivotally supported and foldable with respect to the beam at the upper joint, it can be disassembled, folded and compacted for transportation and storage, and assembled repeatedly. Contributes to use.

  Furthermore, since the upper joint protruding from the vertical column is connected to the beam, the setting of the high strength bolt placement position, zinc rich paint application area, etc. can be changed without changing the vertical column size. Can be performed.

Furthermore, high strength bolts are used at least three, when viewed from the rotation axis direction of the vertical columns in the center of the region in the longitudinal direction of the side and Tatebashira away from the longitudinal pillars of the upper bonding portion, the vertical upper bonding portion It is arranged at least one by one in the region near the column and near the end in the longitudinal direction of the vertical column, and in the region near the vertical column of the upper joint and the central side in the longitudinal direction of the vertical column, It arrange | positions so that it may become a polygonal shape.

  Even with such a configuration, the effect described in claim 4 is obtained. It can be said that this is a range that can be expanded from the results of the tests conducted by the applicant and the common general knowledge based on the results.

In addition , a substantially rectangular flat plate is used for the upper joint portion, and the corner portion on the side farther from the vertical column and closer to the end in the longitudinal direction of the vertical column is cut off when viewed from the rotation axis direction of the vertical column. A high-strength bolt is provided with a formed corner cutting part, and the line connecting each high-strength bolt is along the vertical column, and the other adjacent side is the vertical column. The right-angled portion is arranged in the shape of a substantially right-angled triangle located on the side of the vertical column on which the upper joint portion is disposed, and is located outside the substantially right-angled triangle surrounded by high-strength bolts and in the longitudinal direction of the vertical column. When the pivot axis of the vertical column is arranged on the center side and the vertical column is folded with respect to the beam, when the upper joint portion and the upper joint portion are joined, the corner cutting portion is the vertical column. Is formed so as not to protrude from the beam.

  According to this, when the wife unit is folded with respect to the ceiling unit, the upper joint portion does not protrude from the beam, so that dead space can be eliminated during transportation and storage during assembly and disassembly. In general, four high-strength bolts are often joined, but the present applicant has made it possible to assemble, disassemble and repeatedly use the three-strength bolts with the above-described configuration. It is made clear by the test results.

In addition, a plate-like lower joint that protrudes along the lateral direction of the vertical column is disposed at the lower end of the vertical column, and the lower joint and the both ends in the longitudinal direction of the floor beam of the floor unit A lower joint portion to be joined is provided, and a joint surface with the lower joint portion of the lower joint portion and a joint surface with the lower joint portion of the lower joint portion are formed on a flat surface, respectively. The joint is placed in an overlapping manner, and zinc rich paint is applied to the joint surface between the lower joint of the lower joint and the lower joint of the lower joint. In the region, the lower joint portion and the lower joint portion are fastened with high-strength bolts.

  With the above configuration, the energy absorbing function by friction and support pressure is improved in the same manner as the joint portion between the upper joint portion and the upper joint portion, and the lower joint portion is added to the joint portion between the upper joint portion and the upper joint portion. It is possible to improve the proof stress of the joint portion between the wing and the lower joint portion, which contributes to a building that can be repeatedly assembled and disassembled.

It is a perspective view of the building of one embodiment in the present invention. (A) is the IIa-IIa arrow directional cross-sectional view of FIG. 1, (b) is the IIb-IIb arrow directional cross-sectional view of FIG. It is a partial expanded front view of a to-be-joined part. It is a side view of a wife unit. 4A is a plan view, FIG. 4B is a cross-sectional view taken along line Vb-Vb in FIG. 4, and FIG. 4C is a bottom view. It is a perspective view of a vertical column. It is an enlarged view of Marunouchi of Fig.5 (a). It is the elements on larger scale of FIG.5 (b). FIG. 5 is a partial enlarged cross-sectional view of an upper joint portion and a lower joint portion in FIG. 4. It is an enlarged view of Marunouchi of FIG.5 (c). It is a partial enlarged front view of a lower joint part. FIG. 2 is a cross-sectional view taken along line XII-XII in FIG. 1. It is a front view which shows the state by which the ceiling unit, the wife unit, and the floor unit were folded. It is operation | movement explanatory drawing of the wife unit with respect to a ceiling unit. It is operation | movement explanatory drawing of the wife unit with respect to a ceiling unit. It is a partial expanded side sectional view of an upper joined part and an upper joined part. It is a partial expanded side surface sectional view of a lower joined part and a lower joined part. It is a partial expanded front sectional view of a lower joined part and a lower joined part. It is an installation state figure of a specimen. (A) is a figure which shows arrangement | positioning of the clip gauge in the junction part of an upper junction part and an upper joint part, (b) shows arrangement | positioning of the clip gauge in the junction part of a lower junction part and a lower joint part. FIG. It is the elements on larger scale of a test body. Load used when setting the permissible load P _a in monotonic loading - is a reference diagram of the displacement curve. Load used when setting the permissible load P _a in Cyclic Loading - is a reference diagram of the displacement curve. (A) is a load-displacement curve with a distance l between fulcrums, and (b) is a load-displacement curve measured with a clip gauge when the load is monotonically loaded on a column / beam joint. (A) is a load-displacement curve with a distance 1 between fulcrums, and (b) is a load-displacement curve measured with a clip gauge in a monotonic load on a column / beam joint-. (A), (b), (c) It is a load-displacement curve in the repeated loading on the column-beam joint part- performed with each different test body. (A) is a load-displacement curve with a distance l between fulcrums, and (b) is a load-displacement curve measured with a clip gauge at the time of loading in a monotonic load below a column / beam joint. (A) is a load-displacement curve with a distance 1 between fulcrums, and (b) is a load-displacement curve measured with a clip gauge in a monotonic load under a column / beam joint. (A), (b), (c) It is a load-displacement curve in the cyclic | annular loading of the column-beam joint part-lower performed with each different test body. It is the load-displacement curve of the distance l between fulcrums which shows the relationship between the load and deformation | transformation at the time of unused and reuse.

  One embodiment of a building in the present invention is described based on a drawing. In the following description, F of the arrow in FIG. 1 is front, B is back, R is right, L is left, U is up, and D is down.

  The building 10 schematically includes a ceiling unit 20, a wife unit 30, and a floor unit 50 as shown in FIG. In the present embodiment, a unit house that can be folded and assembled, disassembled and used repeatedly will be described.

  As shown in FIGS. 1 to 3, the ceiling unit 20 includes a front beam 21 positioned on the front side, a rear beam 22 positioned on the rear side, and a plurality of purlins (not shown) spanned between the front beam 21 and the rear beam 22. And is formed in a substantially ladder shape. And the ceiling unit 20 is formed so that the roof panel which is not illustrated can be mounted | worn.

  As shown in FIG. 2 (a), the front beam 21 and the rear beam 22 are made of lip channel steel formed so that the width of the upper lip side is larger than the width of the lower lip side, as shown in FIG. It has been. As shown in FIG. 2B, an outer wall receiver 23 made of light Z-shaped steel is disposed at an intermediate portion of the front beam 21 and the rear beam 22 other than the upper joint portion 24 described later. The front beam 21 is arranged so that the opening side is the front side, and the rear beam 22 is arranged so that the opening side is the rear side. In other words, the front beam 21 and the rear beam 22 are arranged with their surfaces opposite to the opening side facing each other. In the present embodiment, the plate thickness of the front beam 21 and the rear beam 22 is 3.2 mm.

  Upper joint portions 24 formed on the left and right ends of the front beam 21 and the rear beam 22 of the front beam 21 and the rear beam 22 facing each other are formed into flat surfaces and joined to an upper joint portion 35 described later. Is arranged.

  As shown by the hatched portion in FIG. 3, a zinc rich paint 70 is applied to the upper joint portion 24 and a friction treatment is applied to a joint surface with an upper plate 36 (upper joint portion 35) described later. .

  The upper bonded portion 24 includes an upper left bonded portion 241 disposed at the left ends of the front beam 21 and the rear beam 22, and an upper right bonded portion 242 disposed at the right ends of the front beam 21 and the rear beam 22. Are distinguished.

  Each upper joint portion 24 is provided with three insertion holes 24 a that penetrate in the front-rear direction and allow the high-strength bolts 60 to be inserted.

  In the state of FIG. 1, the insertion hole 24 a is along the front vertical column 31 or the rear vertical column 32 where one adjacent side is adjacent to the line connecting the insertion holes 24 a when viewed from the rotation axis direction of the wife unit 30. The other adjacent side is arranged so as to be orthogonal to the adjacent front vertical column 31 or rear vertical column 32, and the right-angled portion is arranged in a substantially right triangle shape located on the adjacent front vertical column 31 or rear vertical column 32 side. .

  The upper joint portion 24 is provided with a shaft hole 24 b that penetrates in the front-rear direction and can be inserted through the rotation shaft 61. The shaft hole 24b is disposed outside and below the substantially right triangle surrounded by the insertion hole 24a.

  The wife unit 30 (when distinguishing, the left wife unit 30 is the left wife unit 301 and the right wife unit 30 is the right wife unit 302), as shown in FIGS. A rear vertical column 32, an upper horizontal column 33 that connects the upper ends of the front vertical column 31 and the rear vertical column 32, and a lower horizontal column 34 that connects the lower ends of the front vertical column 31 and the rear vertical column 32. And is formed in a rectangular frame shape. The left wife unit 301 and the right wife unit 302 can be mounted with a wall panel (not shown). The left wife unit 301 and the right wife unit 302 are formed to have a mirror image relationship.

  The front vertical column 31 and the rear vertical column 32 are formed of square-shaped square pipe steel. An upper joint portion 35 is disposed at the upper ends of the front vertical column 31 and the rear vertical column 32.

  In the present embodiment, the upper joint portion 35 is composed of an upper plate 36 formed in a substantially rectangular flat plate shape. Notch portions 31a and 32a having a shape corresponding to the thickness in the front-rear direction of the upper plate 36 from the upper end on the surface side of the front vertical column 31 and the rear vertical column 32 where the front vertical column 31 and the rear vertical column 32 face each other. Are provided, and the front vertical column 31 and the upper plate 36, the rear vertical column 32 and the upper plate 36 are notched so as to be flush with the surfaces of the front vertical column 31 and the rear vertical column 32 facing each other. Upper plates 36 are disposed on the portions 31a and 32a, respectively, and are fixed by welding or the like.

  Lid members 31c and 32c are disposed at upper ends of the front vertical column 31 and the rear vertical column 32, respectively.

  In the left wife unit 301, the upper plate 36 extends from the front vertical column 31 and the rear vertical column 32 to the right, and in the right wife unit 302, the upper plate 36 extends from the front vertical column 31 and the rear vertical column 32 to the left. ing.

  As shown in FIG. 8, the upper plate 36 has a rectangular plate as a front vertical column 31 when the wife unit 30 is rotated with respect to the ceiling unit 20 when viewed from the rotation axis direction of the wife unit 30. The upper side of the side away from the rear vertical column 32 includes a corner cut portion 36 c formed by being cut in an arc shape around the rotation shaft 61 of the wife unit 30, and includes the front beam 21 and the rear beam 22 of the ceiling unit 20. It is formed so as not to protrude from the upper end.

  The upper plate 36 is provided with three insertion holes 36a that penetrate in the front-rear direction and allow the high-strength bolt 60 to be inserted therethrough. In the state of FIG. 1, the insertion hole 36 a is along the front vertical column 31 or the rear vertical column 32 where one adjacent side is adjacent to the line connecting the insertion holes 36 a when viewed from the rotation axis direction of the wife unit 30. The other adjacent side is orthogonal to the adjacent front vertical column 31 or rear vertical column 32, and the right-angled portion is a substantially right triangular shape located on the front vertical column 31 or rear vertical column 32 side where the upper plate 36 is disposed. Are arranged as follows. In the present embodiment, the plate thickness of the upper plate 36 is 12 mm.

  The upper plate 36 is provided with a shaft hole 36b penetrating in the front-rear direction and allowing the rotation shaft 61 to be inserted therethrough. The shaft hole 36b is disposed outside and below the substantially right triangle surrounded by the insertion hole 36a.

  A lower joint portion 37 is disposed at the lower ends of the front vertical column 31 and the rear vertical column 32.

  In the present embodiment, the lower joint portion 37 is composed of a lower plate 38 formed in a rectangular flat plate shape. Cutout portions 31b and 32b having a shape corresponding to the thickness in the front-rear direction of the lower plate 38 from the lower end are formed on the front vertical column 31 and the rear vertical column 32 on the surface where the front vertical column 31 and the rear vertical column 32 face each other. The lower plate 38 is provided in the notches 31b and 32b so that the front vertical column 31 and the lower plate 38, the rear vertical column 32 and the lower plate 38 are flush with each other, and is fixed by welding or the like. ing. Moreover, the thickness of the front vertical column 31 and the rear vertical column 32 is 4.5 mm.

  Lid members 31d and 32d are disposed at the lower ends of the front vertical column 31 and the rear vertical column 32, respectively.

  The lower plate 38 extends from the front vertical column 31 and the rear vertical column 32 to the right side in the left wife unit 301, and extends from the front vertical column 31 and the rear vertical column 32 to the left side in the right wife unit 302. ing.

  The lower plate 38 is provided with four insertion holes 38a penetrating in the front-rear direction and allowing the high-strength bolts 60 to be inserted therethrough. In the present embodiment, the thickness of the lower plate 38 is 12 mm.

  As viewed from the front-rear direction, the upper horizontal column 33 has a shape steel having no lip on the upper side and a stepped lip on the lower side.

  The upper horizontal column 33 is joined at the front and rear ends of the upper horizontal column 33 by welding or the like so that the front vertical column 31 and the rear vertical column 32 of the lower plate 38 face each other.

  The lower horizontal column 34 is made of light Z-section steel. In the lower horizontal column 34, at the front and rear ends of the lower horizontal column 34, the front vertical column 31 and the rear vertical column 32 of the lower plate 38 are joined to each other by welding or the like.

  As shown in FIG. 15, the wife unit 30 and the ceiling unit 20 are connected to the shaft hole 24 b and the shaft hole 36 b at the joint portion between the upper plate 36 and the upper joint portion 24, and the rotation shaft 61 is inserted. Thus, the end unit 30 is pivotally supported by bolts and nuts or the like, and the wife unit 30 is rotatable with respect to the ceiling unit 20.

  The friction bolt joint structure 80 includes a front vertical column 31, a rear vertical column 32, an upper joint 35 (upper plate 36) disposed on each of the front vertical column 31 and the rear vertical column 32, the front beam 21, and the rear beam. 22, an upper joint portion 24 disposed on each of the front beam 21 and the rear beam 22, a high-strength bolt 60, and a zinc rich paint 70.

  In this embodiment, as shown in FIGS. 15 and 16, the insertion hole 36 a of the upper plate 36 and the insertion hole 24 a of the upper joint portion 24 are communicated with each other, and the upper plate 36 and the upper joint are joined by the high strength bolt 60. The part 24 is fastened. In the friction process, as shown by the hatched portions in FIGS. 3 and 8, the zinc rich paint 70 is applied to the joint surfaces of the upper joint portion 35 (upper plate 36) and the upper joint portion 24.

  The high-strength bolt 60 is a side away from the front vertical column 31 or the rear vertical column 32 of the upper joint 35 and the center side in the longitudinal direction of the front vertical column 31 or the rear vertical column 32 when viewed from the rotational axis direction of the wife unit 30. A region 36e of the upper joint portion 35, a region near the front vertical column 31 or the rear vertical column 32 of the upper joint portion 35, and a region 36e near the end portion in the longitudinal direction of the front vertical column 31 or the rear vertical column 32; Are arranged one by one in a region close to the front vertical column 31 or the rear vertical column 32 and the central side region 36f in the longitudinal direction of the front vertical column 31 or the rear vertical column 32, and arranged in a triangular shape. Yes.

  More specifically, in the state of FIG. 1, the high strength bolt 60 is the front vertical column 31 or the rear vertical column where one of the lines connecting the high strength bolts 60 is viewed from the rotational axis direction of the wife unit 30. 32, the other adjacent side is orthogonal to the front vertical column 31 or the rear vertical column 32, and the right angle portion is arranged in a substantially right triangle shape located on the side of the adjacent front vertical column 31 or rear vertical column 32. ing.

  As shown in FIGS. 1, 11, and 12, the floor unit 50 is bridged between the front floor beam 51 positioned on the front side, the rear floor beam 52 positioned on the rear side, and the front floor beam 51 and the rear floor beam 52. And a plurality of joists (not shown) are formed in a substantially ladder shape. And the floor unit 50 is formed so that the floor panel which is not illustrated can be mounted | worn.

  The front floor beam 51 and the rear floor beam 52 are made of steel having a lip on the upper side and no lip on the lower side. The front floor beam 51 is arranged such that the opening side is the front side, and the rear floor beam 52 is arranged so that the opening side is the rear side. In other words, the front floor beam 51 and the rear floor beam 52 are arranged so that the surfaces opposite to the opening side are opposed to each other. In the present embodiment, the plate thickness of the front floor beam 51 and the rear floor beam 52 is set to 3.2 mm.

  The lower floor joint of the front floor beam 51 and the rear floor beam 52 formed on a flat surface at the left and right ends of the surfaces of the front floor beam 51 and the rear floor beam 52 facing each other and joined to the lower joint portion 37. A portion 54 is provided.

  The lower joint portion 54 is provided with four insertion holes 54a through which the high-strength bolts 60 can be inserted in the front-rear direction.

  The lower joint portion 54 includes a lower left joint portion 541 disposed at the left end portions of the front floor beam 51 and the rear floor beam 52, and a lower right portion disposed at the right end portions of the front floor beam 51 and the rear floor beam 52. A distinction is made between the part to be joined 542.

  The friction bolt joint structure 90 includes a front vertical column 31, a rear vertical column 32, a lower joint 37 (a lower plate 38) disposed on the front vertical column 31 and the rear vertical column 32, a front floor beam 51, and a rear It comprises a floor beam 52, a lower joint portion 54, a high-strength bolt 60, and a zinc rich paint 70 respectively disposed on the front floor beam 51 and the rear floor beam 52.

  In this embodiment, as shown in FIGS. 17 and 18, the insertion hole 38 a of the lower plate 38 and the insertion hole 54 a of the lower joint portion 54 are communicated with each other, and the lower plate 38 and the lower joint are joined by the high strength bolt 60. The part 54 is fastened. In the friction process, as shown by the hatched portions in FIGS. 8 and 11, the zinc rich paint 70 is applied to the joint surfaces of the lower plate 38 and the lower joint portion 54.

  The functional action of the upper plate 36 will be described. As shown in FIG. 13, when the ceiling unit 20 is lifted by a crane or the like in the folded building 10, the wife unit 30 gradually opens with respect to the ceiling unit 20 as shown in FIGS. 14 and 15.

  In a series of operations, the rotation shafts 61 of the front vertical column 31 and the rear vertical column 32 of the wife unit 30 are arranged outside and below the substantially right triangle surrounded by the high-strength bolts 60, and the corner cutting part 36c is a ceiling. Since it does not protrude from the upper end of the beam of the unit 20, it is good for repeated use by eliminating interference between members during assembly and disassembly and dead space during storage.

  Further, the setting of the arrangement position of the high-strength bolt 60, the application area of the zinc rich paint 70, and the like can be made without changing the sizes of the long front vertical column 31 and the rear vertical column 32, etc. This can be done by changing the size.

  The allowable strength and ultimate strength of the building 10 will be described below based on the test results.

1. Allowable proof stress and ultimate proof stress of the joint portion of the unit house (building 10) The joint portion between the upper joint portion 35 and the upper joint portion 24, and the joint portion between the lower joint portion 37 and the lower joint portion 54 (hereinafter referred to as column beams) The allowable proof stress and ultimate proof stress of the joint portion are the following values determined by experiments shown in Tables 1 and 2.

2. Outline of the test (1) Purpose of the test Perform a bending test of the beam-column joint and evaluate the allowable strength and ultimate strength of each joint. The test method is to use a L-shaped test specimen as a reference with reference to “Technical Regulations on Evaluation of Structural Strength Performance of Low-Rise Buildings (Steel System) 5.4b Strength / Rigidity of Column / Beam Joint”.

(2) Test method Fig. 19 shows an installation drawing of the test specimen. The test uses a hydraulic jack J to load the beam or floor beam side. The column core and the joint core of the beam or floor beam are eccentrically joined to prevent the tilting in the out-of-plane direction. For the steady rest, an out-of-plane restraining jig P (pantograph) is installed. The loading point bearing is a roller bearing using a slider S. And the displacement amount of the distance l between the fulcrum of a test body shown in FIG. 21 when a positive force and a negative force are applied is measured.

  As shown in FIG. 20A, at the joint portion between the upper joint portion 35 and the upper joint portion 24, the clip gauge is an end of the upper plate 36 on the side away from the front vertical column 31 and the rear vertical column 32. And it is arranged at a position to be the lower end, an end on the side away from the front vertical column 31 and the rear vertical column 32 and a position to be the upper end (the clip gauge on the upper side is Clip1, the clip gauge on the lower side is Clip2, The clip 1a was used only when the load was monotonously loaded), and the displacement of the upper plate 36 relative to the front beam 21 and the rear beam 22 was measured.

  As shown in FIG. 20 (b), the clip gauge has an end portion on the side of the lower plate 38 away from the front vertical column 31 and the rear vertical column 32, as shown in FIG. It is arranged at a position to be the upper and lower lower ends (the upper clip gauge is Clip1 and the lower clip gauge is Clip2), and the amount of displacement of the lower plate 38 relative to the front floor beam 51 and the rear floor beam 52 is measured.

3. Evaluation method of allowable strength The allowable strength of beam-column joints shall be a value determined by experiment. In the experiment, monotonous loading and repeated loading were performed, and allowable strength was set for the joint portion between the upper joint portion 35 and the upper joint portion 24 and the joint portion between the lower joint portion 37 and the lower joint portion 54.

Allowable bending strength _p M _a, allowable shear strength _p Q _a and permissible axis Strength _p N _a sets the permissible load P _a, based on the value of the specimen shown in FIG. 21 was calculated by the following equation.

_p M _a = P _a × H
_p Q _a = P _a × _C 1 / l
_p N _a = P _a × _G l / l
H: Height between the fulcrum of the specimen and the column beam joint center l: Distance between the fulcrum of the specimen
_C l: Distance between the column fulcrum of the specimen and the column beam joint center position
_G l: Distance between beam fulcrum of test specimen and column beam joint center position The numerical values of H, l, _C l and _G l are shown in the upper column of Table 3.

Allowable load P _a is set in the following manner.

a) Long side direction (longitudinal direction of beams and floor beams) Upper and lower parts
i) so that it refers to a monotonic loading Figure 22, the displacement of the clip gauge was set permissible load P _a with the following procedure. 1) Write the load-displacement curve of the clip gauge. 2) Draw a straight line I with an initial slope. 3) Set a point at which the load-displacement curve of the clip gauge begins to move away from the straight line I, and draw a straight line II with a displacement advanced by 0.2 mm in parallel from that point. 4) A straight line III parallel to the y-axis is drawn from the straight line II. 5) the load of the clip gauge - and the load of the intersection of the displacement curve and the straight line III and set article permissible load P _a.

ii) to refer to cyclic loading Figure 23, set the positive load and when the load tolerate heavy when load slippage high-strength bolts 60 has occurred for each (load portion graph becomes ledge) load P _a document It was.

Monotonous NoKa load, sets the permissible load P _a corrected numerical settings article cyclic loading.

4). Evaluation method of ultimate strength The ultimate strength of the beam-column joint is determined by experiment. In the experiment, monotonous loading and repeated loading were performed, and ultimate proof stress was set for the joint portion between the upper joint portion 35 and the upper joint portion 24 and the joint portion between the lower joint portion 37 and the lower joint portion 54.

Ultimate Flexural Strength _p M _u, Shear Strength _p Q _u and Ultimate axis Strength _p N _u sets the ultimate load P _u, was calculated by the following equation.

_p M _u = P _u × H
_p Q _u = P _u × _C 1 / l
_p N _u = P _u × _G l / l
H: Height between the fulcrum of the specimen and the column beam joint center l: Distance between the fulcrum of the specimen
_C l: Distance between the column fulcrum of the specimen and the column beam joint center position
_G l: Distance from the beam fulcrum of the test specimen to the column beam joint center position The numerical values of H, l, _C l and _G l are shown in the lower column of Table 3.

The i) monotonic loading the maximum load was set article in the ultimate load P _u.

ii) the absolute value cyclic loading sign is the set article in ultimate load P _u of the maximum load.

The ultimate load _Pu was set by correcting the numerical values in the setting data for monotonic loading and repeated loading.

5. Test result (1) Column / beam joint-up (joint part between upper joint 35 and upper joint 24)
<Set of allowable load P _a>
Monotonic loading: Negative force FIG. 24 (a) shows the displacement of the fulcrum distance l when the load is heavy. a) The load collected based on the method shown in i) is 34.81 kN as shown in the column of the specimen in Table 4.

Monotonic loading: Positive applied force FIG. 25 (a) shows the amount of displacement of the fulcrum distance l under positive load. a) The load collected based on the method shown in i) is 34.07 kN as shown in the column of the specimen in Table 4.

Repetitive loading From the graphs of displacement shown in FIGS. 26 (a), (b), and (c), the load at the portion where the graph is shelf-like is described in the column of the specimen in Table 4.

  3. above. a) The load collected based on the method shown in ii) is 22.30 kN at the time of positive load from the graph of FIG. Sometimes it is 25.80 kN. From the graph of FIG. 26B, it is 36.45 kN at the time of positive load and 25.05 kN at the time of heavy load. From the graph of FIG. 26 (c), it is 30.15 kN when the load is positive, and 25.50 kN when the load is heavy.

  In addition, the load 34.90 kN of the test body of the experiment at the time of re-use which will be described later is also described in the rejoining column in Table 4 and is set as a setting target.

The average of the numerical values of the data at the time of positive loading of the monotonic loading, the load of monotonic loading, and the repeated loading is obtained, the standard deviation is obtained, and the numerical value obtained by subtracting the standard deviation from the average is shown in Table 24. 57kN was adopted permissible load P _a.

<Setting of ultimate load P _u>
Monotonic loading: Negative force FIGS. 24A and 24B show the amount of displacement in the negative direction. a) The maximum load collected based on the method shown in i) is 62.25 kN as shown in the column of the specimen in Table 5.
Monotonic loading: Positive force FIGS. 25 (a) and 25 (b) show the amount of displacement in the positive direction. a) The maximum load collected based on the method shown in i) is 72.00 kN as shown in the column of the specimen in Table 5.

Repeated loading From the graphs of displacement shown in FIGS. 26 (a), (b) and (c), the maximum load is described in the column of the specimen in Table 5.

  3. above. a) The load collected based on the method shown in ii) is 58.05 kN at the time of a positive load from the graph of FIG. From the graph of FIG. 26B, it is 53.70 kN at the time of a positive load. From the graph of FIG. 26 (c), it is 65.40 kN at the time of a positive load.

  Note that the test specimen load of 64.95 kN during re-use, which will be described later, is also described in Table 5 in the rejoining column, and is the target of setting.

The average of the numerical values of the data at the time of the positive load of the monotonic load, the load of the monotonic load, and the repeated load is obtained to obtain the standard deviation, and the numerical value obtained by subtracting the standard deviation from the average is shown in Table 56. the 37kN was a temporary ultimate load P _a.

Then, as shown in Table 6, the 50.45kN by the material correction was set at ultimate load P _a.

(2) Column / beam joint-bottom (joint part of lower joint part 37 and lower joint part 54)
<Set of allowable load P _a>
Monotonic loading: positive applied force FIG. 27 (a) shows the amount of displacement in the negative direction. a) The load collected based on the method shown in i) is 26.92 kN as shown in the column of the specimen in Table 4.
Monotonic loading: negative force Fig. 28 (a) shows the displacement amount in the positive direction. a) The load collected based on the method shown in i) is 25.00 kN as shown in the column of the specimen in Table 4.
Repetitive loading From the graphs of displacement shown in FIGS. 29 (a), (b), and (c), the load of a line drawn vertically parallel to the x-axis is shown in the shelf-like portion of the graph. It is described in the column of 4 specimens.

  3. above. a) The load collected based on the method shown in ii) is 18.15 kN at the time of positive load from the graph of FIG. In time, it is 22.65 kN. From the graph of FIG. 29B, it is 22.50 kN at the time of positive load, and 21.75 kN at the time of load heavy. From the graph of FIG. 29 (c), the load is 21.45 kN when the load is positive, and 21.90 kN when the load is heavy.

Averages of numbers of the article, the standard deviation, the value obtained by subtracting the standard deviation from the mean was set to 19.96kN adoption permissible load P _a described in Table 4.

<Setting of ultimate load P _u>
Monotonic loading: negative force FIGS. 27A and 27B show the amount of displacement in the negative direction. a) The maximum load collected based on the method shown in i) is 62.25 kN as shown in the column of the specimen in Table 5.
Monotonic loading: Positive applied force FIGS. 28A and 28B show the amount of displacement in the positive direction. a) The maximum load collected based on the method shown in i) is 59.10 kN as shown in the column of the specimen in Table 5.

  From the graphs of displacement shown in FIGS. 29A, 29B, and 29C, the maximum load is described in the column of the specimen in Table 5.

  4. above. a) The load collected based on the method shown in ii) is 59.10 kN at the time of a positive load from the graph of FIG. From the graph of FIG. 29B, it is 58.50 kN when the load is heavy. From the graph of FIG. 29 (c), it is 64.05 kN at the time of positive load.

Averages of numbers of the article, the standard deviation was the 58.37kN described numerical values by subtracting the standard deviation from the mean in Table 5 and provisional ultimate load P _a.

Then, as shown in Table 6, it was set to 52.06kN the ultimate load P _a with a material correction.

6). Summary 5. The test results of 3. 3. Evaluation method of allowable yield strength The allowable strength and ultimate strength of the joint were calculated by the ultimate strength evaluation method. A list of results is shown. Moreover, the joint strength at this time is shown.

The relationship between allowable bending strength and ultimate bending strength is shown. From Table 9, there the ratio of ultimate flexural strength _p M _u is 2.0 or more with respect to the allowable bending strength _p M _a, and is necessary and sufficient plastic deformation capacity is ensured. In other words, it can be said that the column / beam joint has a stickiness against a horizontal load.

  The numerical values in Tables 7 and 8 are detailed regulations of Article 20 of the Building Standards Act, which are the detailed rules of “Building shall be a safe structure against loads such as its own weight, loading load and wind pressure”. It is possible to secure a safe strength against the wind load (wind resistance) stipulated in Article 87 and the earthquake load (earthquake resistance) stipulated in Article 88 of the Building Standards Law Enforcement Order.

1. Outline of test at reuse The design specifications of the joint at the time of reuse shall be the same as the unit when not in use.
Conduct a re-use test. The same results as when not used were obtained. Test outline and test results are shown in the next section.

2. Outline of the test (1) Outline A bending test of the beam-column joint was performed, and the joint when not in use was compared with the reuse.

(2) Test method The test was performed with a monotonous positive force. The test procedure is shown below.

Specimen when not in use: Monotonic loading test ⇒ Finish after loading up to maximum load Reusable specimen: Monotonic loading test ⇒ Finish once with design equivalent load ⇒ Strip the joint surface and check the state ⇒ Remove the coating film and repaint ⇒Bolt tightening ⇒Retest ⇒End after loading up to maximum load Test Results FIG. 30 shows the relationship between the load and deformation when not used and when reused. It can be seen that the proof stresses when not in use and reused are almost the same. Table 10 shows a comparison list of allowable proof stresses. Allowable load P _a is the percentage of time unused 1.02, therefore, it can be seen that it is possible to repeatedly use.

  The building 10 having the above configuration is a building including a ceiling unit 20, a floor unit 50, and a wife unit 30, and the wife unit 30 includes a pair of front vertical columns 31, rear vertical columns 32, and The front vertical column 31 has a frame formed in a rectangular frame shape having an upper horizontal column 33 and a lower horizontal column 34 that connect the upper and lower ends of the front vertical column 31 and the rear vertical column 32, respectively. At the upper end of the rear vertical column 32, a plate-like upper joint portion 35 that protrudes along the short direction of the front vertical column 31 and the rear vertical column 32 is disposed. Upper joint portions 24 to be joined to the upper joint portion 35 are respectively disposed at both ends in the longitudinal direction of the beam 22, and a joint surface with the upper joint portion 24 and the upper joint portion 24 of the upper joint portion 35 are arranged. The joint surface with the upper joint portion 35 is formed as a flat surface, and the upper joint portion 35 and the upper joint portion 24 are overlapped. The front vertical column 31 and the rear vertical column 32 are pivotally supported by the upper joint portion 35 so as to be rotatable with respect to the front beam 21 and the rear beam 22 of the ceiling unit 20, and the upper joint portion of the upper joint portion 35. The zinc rich paint 70 is applied to the bonding surface between the bonding surface with the upper bonding portion 24 and the upper bonding portion 35 of the upper bonded portion 24, and the upper bonding is performed by the high-strength bolt 60 in the region where the zinc rich paint 70 is applied. The part 35 and the upper joint part 24 are fastened.

  According to this, the frame constituting the wife unit 30 is made a rectangular frame to increase the rigidity, and the zinc rich paint 70 that is used for the fastening with the high-strength bolt 60 and the antirust treatment and can be easily obtained is connected to the upper joint portion 35. By applying the friction treatment to the joint surface between the upper joint portion 24 and the upper joint portion 24, the energy absorption function by friction and supporting pressure is improved, and the proof stress of the joint portion between the upper joint portion 35 and the upper joint portion 24 can be improved. Become.

  Therefore, since the strength of the front vertical column 31, the rear vertical column 32, the front beam 21, and the rear beam 22 in the vicinity of the bonded portion of the upper bonded portion 35 and the upper bonded portion 24 and the periphery thereof can be ensured, use repeatedly. Can do.

  Further, since the front vertical column 31 and the rear vertical column 32 are pivotally supported and foldable with respect to the front beam 21 and the rear beam 22 at the upper joint portion 35, they can be disassembled during transportation and storage. Can be folded and made compact, contributing to repeated assembly and use.

  And after dismantling, the zinc rich paint 70 is peeled off and applied again, so that a friction bolt joint structure capable of maintaining the proof strength and withstanding repeated use can be obtained.

  Further, since the front vertical column 31 and the rear vertical column 32 are pivotally supported and foldable with respect to the beam in the upper joint portion 35, they can be disassembled and folded to be compact during transportation and storage. Can contribute to repetitive assembly and use.

  Further, since the upper joint portion 35 protruding from the front vertical column 31 and the rear vertical column 32 is joined to the beam, the setting of the arrangement position of the high strength bolt 60, the application area of the zinc rich paint 70, and the like is set. This can be done by changing the upper joint portion 35 without changing the size of the rear vertical column 32.

  Further, three high-strength bolts 60 are used, and when viewed from the rotational axis direction of the wife unit 30, the side away from the front vertical column 31 or the rear vertical column 32 of the upper joint portion 35 and the front vertical column 31 or the rear vertical column. A region 36d on the center side in the longitudinal direction of 32, a region near the front vertical column 31 or the rear vertical column 32 of the upper joint portion 35, and a region near the end in the longitudinal direction of the front vertical column 31 or the rear vertical column 32 36e and one side of the upper joint portion 35 near the front vertical column 31 or the rear vertical column 32 and the central region 36f in the longitudinal direction of the front vertical column 31 or the rear vertical column 32, one by one, and the triangular shape It is arranged to become. By taking such a configuration, the above-described effects can be achieved.

  Further, the upper joint portion 35 is a substantially rectangular flat plate, and is a side away from the front vertical column 31 and the rear vertical column 32 and the front vertical column as viewed from the rotation axis direction of the front vertical column 31 and the rear vertical column 32. 31, a corner portion 36c formed by cutting off a corner portion of the rear vertical column 32 close to the longitudinal end thereof, and the high strength bolt 60 rotates the front vertical column 31 and the rear vertical column 32. When viewed from the axial direction, the line connecting the high-strength bolts 60 has one adjacent side along the front vertical column 31 and the rear vertical column 32, and the other adjacent side orthogonal to the front vertical column 31 and the rear vertical column 32, The right-angled portion is arranged so as to be a substantially right-angled triangle positioned on the front vertical column 31 and the rear vertical column 32 side where the upper joint portion 35 is disposed, and outside and front of the substantially right-angled triangle surrounded by the high strength bolt 60. The rotation shaft 61 of the front vertical column 31 and the rear vertical column 32 is arranged on the center side in the longitudinal direction of the vertical column 31 and the rear vertical column 32, and the front vertical column 3 When the rear vertical column 32 is joined to the state of being folded with respect to the front beam 21 and the rear beam 22, the corner cutting portion 36 c has the rotation axis of the front vertical column 31 and the rear vertical column 32. It is formed so as not to protrude from the upper ends of the front beam 21 and the rear beam 22 when viewed from the direction.

  According to this, when the wife unit 30 is folded with respect to the ceiling unit 20, the upper joint portion 35 does not protrude from the front beam 21 and the rear beam 22, so that it is a dead space during transportation and storage during assembly and disassembly. Can be eliminated. Usually, the high-strength bolt 60 is often joined with four pieces, but the applicant has made it possible to assemble, disassemble and repeatedly use the three-strength bolts with the above construction. It is clarified by the test results.

  Further, at the lower ends of the front vertical column 31 and the rear vertical column 32, a plate-like lower joint portion 37 protruding along the short direction of the front vertical column 31 and the rear vertical column 32 is disposed, and the floor unit 50 is provided. At both ends in the longitudinal direction of the front floor beam 51 and the rear floor beam 52, a lower joint portion 54 to be joined to the lower joint portion 37 is disposed, and a joint surface with the lower joint portion 54 of the lower joint portion 37 In addition, the joint surface of the lower joint portion 54 and the lower joint portion 37 is formed as a flat surface, and the lower joint portion 37 and the lower joint portion 54 are arranged to overlap each other. Zinc rich paint 70 is applied to the joint surface between the joint surface 54 and the lower joint portion 37 of the lower joint portion 54, and the lower joint portion is applied by the high-strength bolt 60 in the region where the zinc rich paint 70 is applied. 37 and the lower joint part 54 are fastened.

  With the above configuration, the energy absorbing function by friction and support pressure is improved in the same manner as the joint portion between the upper joint portion 35 and the upper joint portion 24, and in addition to the joint portion between the upper joint portion 35 and the upper joint portion 24. The strength of the joint portion between the lower joint portion 37 and the lower joint portion 54 can be improved, which contributes to a building that can be repeatedly assembled and disassembled.

  The building 10 of the present invention is not limited to the above configuration. That is, various design changes can be made without departing from the gist of the present invention.

  The joint structure of the present invention is not limited to application to a unit house, and can be applied to a column beam joint of a building.

  Moreover, the member which comprises the ceiling unit 20, the floor unit 50, and the wife unit 30 can also be changed into the existing shape steel suitably, and can also be used.

  Further, the corner cut portion 36 c is cut in an arc shape, but the upper joint portion 35 does not protrude from the front beam 21 and the rear beam 22, and the joint portion between the upper joint portion 35 and the upper joint portion 24. If it can improve the yield strength, it can be cut into other shapes such as a straight line and a bent line.

  In addition, the upper joint portion 35 and the upper joint portion 24 are joined so that the high-strength bolts 60 are arranged in a substantially right-angled triangle shape. By arranging in a substantially rectangular shape or polygonal shape, it is possible to increase the number of fastening points and improve the yield strength of the joint portion between the upper joint portion 35 and the upper joint portion 24.

DESCRIPTION OF SYMBOLS 10 Building 20 Ceiling unit 21 Front beam 22 Rear beam 24 Upper joint part 241 Upper left joint part 242 Upper right joint part 30 Wife unit 301 Left wife unit 302 Right wife unit 31 Front vertical pillar 32 Rear vertical pillar 33 Upper horizontal pillar 34 Lower horizontal column 35 Upper joint portion 36 Upper plate 36c Corner cut portion 36d Region 36e Region 36f Region 37 Lower joint portion 38 Lower plate 50 Floor unit 51 Front floor beam 52 Rear floor beam 54 Lower joint portion 60 High strength bolt 70 Zinc Rich paint 80 Friction bolt joint structure 90 Friction bolt joint structure

Claims (3)

A friction bolt joint structure applied to a column beam joint where a long column member arranged along a vertical direction and a long beam member arranged along a horizontal direction are joined. ,
At the end in the longitudinal direction of the column member, a plate-like joint projecting along the short direction of the column member is disposed,
An end portion in the longitudinal direction of the beam member is provided with a bonded portion to be bonded to the bonding portion,
The joint surface of the joint portion with the joint portion and the joint surface of the joint portion with the joint portion are each formed on a flat surface.
The joined portion and the joined portion are arranged to overlap each other,
The column member is pivotally supported so as to be rotatable with respect to the beam member at the joint,
Zinc rich paint is applied to the joint surface between the joint portion and the joint portion of the joint portion and the joint portion of the joint portion,
In the region where the zinc rich paint is applied, the joined portion and the joined portion are fastened by a high-strength bolt ,
At least three high-strength bolts are used, as viewed from the rotation axis direction of the column member,
A region on the side of the joint portion away from the column member and a central region in the longitudinal direction of the column member;
A region of the joint near the column member and a region near the end in the longitudinal direction of the column member;
A region near the column member of the joint and a central region in the longitudinal direction of the column member;
Arranged at least one by one,
As viewed from the direction of the axis of rotation of the column member, the line connecting the high-strength bolts has one adjacent side along the column member, the other adjacent side orthogonal to the column member, and a right-angled portion being the joint. Is arranged so as to have a substantially right triangle located on the column member side where
The joining portion uses a substantially rectangular flat plate, and a corner portion on the side away from the column member and near the end in the longitudinal direction of the column member as viewed from the rotation axis direction of the column member is cut off. With a corner cut formed
The pivot shaft of the column member is disposed outside the substantially right triangle surrounded by the high-strength bolt and on the center side in the longitudinal direction of the column member, and the joining is performed from the state in which the column member is folded with respect to the beam member. The corner cutting portion is formed so as not to protrude from the beam member when viewed from the rotational axis direction of the column member when the portion and the joined portion are joined. Friction bolt joint structure. A building comprising a ceiling unit, a floor unit, and a wife unit,
The wife unit has a frame formed in a rectangular frame shape having a pair of vertical columns and horizontal columns that respectively connect upper and lower ends of the vertical columns.
At the upper end of the vertical column, a plate-like upper joint that protrudes along the short direction of the vertical column is disposed,
At both ends in the longitudinal direction of the beam of the ceiling unit, an upper joint portion to be joined to the upper joint portion is disposed, respectively.
A bonding surface of the upper bonding portion with the upper bonding portion and a bonding surface of the upper bonding portion with the upper bonding portion are each formed on a flat surface.
The upper joint portion and the upper joint portion are arranged to overlap each other,
The vertical column is pivotally supported to be rotatable with respect to the beam of the ceiling unit at the upper joint portion,
Zinc rich paint is applied to the joint surface between the upper joint portion of the upper joint portion and the joint surface of the upper joint portion with the upper joint portion,
In the region where the zinc rich paint is applied, the upper joint portion and the upper joint portion are fastened by a high-strength bolt ,
At least three high-strength bolts are used, as viewed from the direction of the axis of rotation of the vertical column,
A region on the side of the upper joint portion away from the vertical column and a central region in the longitudinal direction of the vertical column;
A region near the vertical column of the upper joint and a side close to an end in the longitudinal direction of the vertical column;
A region near the vertical column of the upper joint and a central region in the longitudinal direction of the vertical column;
Arranged at least one by one,
As viewed from the direction of the rotation axis of the vertical column, the line connecting the high-strength bolts has one adjacent side along the vertical column, the other adjacent side is orthogonal to the vertical column, and a right-angled portion is the upper joint. Arranged so as to be a substantially right triangle located on the vertical column side where the portion is disposed,
The upper joint portion is a substantially rectangular flat plate, and the corner portion on the side away from the vertical column and near the end in the longitudinal direction of the vertical column as viewed from the rotational axis direction of the vertical column is cut off. A corner cut portion formed and formed,
The rotating shaft of the vertical column is disposed outside the substantially right triangle surrounded by the high-strength bolt and on the center side in the longitudinal direction of the vertical column, and the upper column is folded from the state where the vertical column is folded with respect to the beam. The corner cutting portion is formed so as not to protrude from the beam when viewed from the rotational axis direction of the vertical column when the portion and the upper joint portion are joined. Building. At the lower end of the vertical column, a plate-like lower joint that protrudes along the short direction of the vertical column is disposed,
At both ends in the longitudinal direction of the floor beam of the floor unit, a lower joint part to be joined to the lower joint part is disposed,
A bonding surface of the lower bonding portion with the lower bonding portion and a bonding surface of the lower bonding portion with the lower bonding portion are each formed on a flat surface.
The lower joint portion and the lower joint portion are arranged to overlap each other,
Zinc rich paint is applied to the joint surface of the lower joint part with the lower joint part and the lower joint part of the lower joint part,
The building according to claim 2 , wherein the lower joint portion and the lower joint portion are fastened by high-strength bolts in a region where the zinc rich paint is applied.