JP5717284B2

JP5717284B2 - Seismic reinforcement structure for existing buildings and seismic reinforcement method for existing buildings

Info

Publication number: JP5717284B2
Application number: JP2011058911A
Authority: JP
Inventors: 恭司野口; 淳小森; 鈴木　亨; 亨鈴木; 小坂　英之; 英之小坂; 寛江頭; 浩新上; 直岡本; 卓哉舛田
Original assignee: Sumitomo Mitsui Construction Co Ltd
Current assignee: Sumitomo Mitsui Construction Co Ltd
Priority date: 2011-03-17
Filing date: 2011-03-17
Publication date: 2015-05-13
Anticipated expiration: 2031-03-17
Also published as: JP2012193557A

Description

本発明は、間柱を使って既設建物を補強する、既設建物の耐震補強構造、及び既設建物の耐震補強工法に関する。 The present invention relates to a seismic reinforcement structure for an existing building and a seismic reinforcement method for an existing building, in which an existing building is reinforced using a stud.

近年、既設建物（例えば、複数階層の集合住宅やオフィスビル）に間柱を設置して耐震補強をする構造や工法については、種々のものが提案されている（例えば、特許文献１参照）。 In recent years, various structures and construction methods have been proposed for seismic reinforcement by installing studs in existing buildings (for example, multi-story apartment houses and office buildings) (see, for example, Patent Document 1).

図７は、既設建物の耐震補強構造の従来例を示す図であり、符号２２１は、各階の床スラブを示し、符号２２２は、該床スラブ２２１に立設された柱（既設柱）を示し、符号２２３は、該柱２２２に架け渡された梁を示す。そして、符号２０３は、耐震補強のために設けられた間柱を示す。この間柱２０３の上端は、天井側の梁２２３や上階の床スラブ２２１を貫通するように設けた定着具２４１によって固定され、該間柱２０３の下端は、その階の床スラブ２２１や下階の梁２２３を貫通するように設けた定着具２４２によって固定されている。なお、符号２０３ａは、水平変位の減衰のために設けられたダンパである。 FIG. 7 is a diagram showing a conventional example of a seismic reinforcement structure for an existing building. Reference numeral 221 indicates a floor slab of each floor, and reference numeral 222 indicates a column (existing column) erected on the floor slab 221. Reference numeral 223 denotes a beam spanning the pillar 222. Reference numeral 203 indicates a stud provided for seismic reinforcement. The upper end of the stud 203 is fixed by a fixing tool 241 provided so as to penetrate the beam 223 on the ceiling side and the floor slab 221 on the upper floor, and the lower end of the stud 203 is connected to the floor slab 221 on the floor and the lower floor. It is fixed by a fixing tool 242 provided so as to penetrate the beam 223. Reference numeral 203a is a damper provided for the attenuation of horizontal displacement.

特開２００７−１２６８３０号公報JP 2007-126830 A

しかしながら、上述の構成のものでは、定着具２４１，２４２が各階を貫通するように設けられているため、ある階に間柱２０３を設置する場合であっても、上階の側からの作業と、下階の側からの作業を必要とし、作業負担が増えると共に、上階居住者や下階の居住者に迷惑を掛けてしまうという問題があった。 However, in the above-described configuration, since the fixing tools 241 and 242 are provided so as to penetrate each floor, even when the stud 203 is installed on a certain floor, the work from the upper floor side, There is a problem that work from the lower floor side is required, and the work load increases, and it causes trouble for the upper floor residents and the lower floor residents.

本発明は、上述の問題を解消することのできる既設建物の耐震補強構造、及び既設建物の耐震補強工法を目的とするものである。 An object of the present invention is to provide a seismic reinforcement structure for an existing building that can solve the above-described problems, and a seismic reinforcement method for an existing building.

請求項１に係る発明は、図１及び図２に例示するものであって、床スラブ（２１）と、該床スラブ（２１）に立設される２本の柱（以下、「既設柱」とする）（２２）と、該２本の既設柱（２２）に架け渡されて前記床スラブ（２１）に対向するように該床スラブ（２１）の上方に配置される梁（２３）と、を備えた既設建物（２）を補強する、既設建物の耐震補強構造（１）において、
前記梁（２３）の一部であって、前記２本の既設柱（２２）の間に位置して前記床スラブ（２１）に対向する部分（２３ａ）を「梁中間部」と定義した場合に、
該梁中間部（２３ａ）に沿って略水平に延設される水平部（３１）と、該水平部（３１）から前記床スラブ（２１）の近傍まで垂下される垂下部（３２）と、を有すると共に室内とベランダとの境界部分における開口（図３（ａ）の符号Ａ参照）と開口（Ａ）との間に配置される間柱（３）と、
前記水平部（３１）を前記梁中間部（２３ａ）に剛結する水平部結合部材（４１）と、
前記垂下部（３２）を前記床スラブ（２１）の上面（２１ａ）に結合する垂下部結合部材（４２，１４２）と、
を備え、
該垂下部結合部材（４２，１４２）は、前記床スラブ（２１）の上面側に配置されて、前記垂下部（３２）の前記床スラブ（２１）への結合を該床スラブ（２１）の上面側にて行えるように構成され、
前記垂下部結合部材（４２，１４２）による前記垂下部（３２）の前記床スラブの上面（２１ａ）への結合は、該垂下部（３２）と該床スラブの上面（２１ａ）とを接触させた状態、又は該垂下部（３２）と該床スラブの上面（２１ａ）との間に他の部材（以下、「床スラブ側介装部材」とする）を介装させた状態で行われ、
前記垂下部（３２）は、前記垂下部結合部材によって前記床スラブ側介装部材又は前記床スラブ（２１）にピン結合されたことを特徴とする。請求項２に係る発明は、請求項１に係る発明において、前記間柱（３）は略Ｔ字状又は略Ｌ字状に形成されたことを特徴とする。 The invention according to claim 1 is illustrated in FIGS. 1 and 2, and includes a floor slab (21) and two columns (hereinafter referred to as “existing columns”) standing on the floor slab (21). (22) , and a beam (23) that is placed over the two existing pillars (22) and arranged above the floor slab (21) so as to face the floor slab (21). In the seismic reinforcement structure (1) of the existing building that reinforces the existing building (2) with
When a part (23a) which is a part of the beam (23) and is located between the two existing pillars (22) and faces the floor slab (21) is defined as a “beam intermediate part” In addition,
A horizontal portion (31) extending substantially horizontally along the beam intermediate portion (23a), a hanging portion (32) suspended from the horizontal portion (31) to the vicinity of the floor slab (21), And a stud (3) disposed between the opening (see symbol A in FIG. 3 (a)) and the opening (A) at the boundary between the room and the veranda ,
A horizontal portion coupling member (41) for rigidly coupling the horizontal portion (31) to the beam intermediate portion (23a);
A drooping coupling member (42, 142) for coupling the drooping portion (32) to the upper surface (21a) of the floor slab (21);
With
The drooping member (42, 142) is arranged on the upper surface side of the floor slab (21), and the drooping member (32) is coupled to the floor slab (21) of the floor slab (21). It is configured so that it can be done on the top side ,
The hanging part (42, 142) is connected to the upper surface (21a) of the hanging part (32) by bringing the hanging part (32) and the upper surface (21a) of the floor slab into contact with each other. Or a state in which another member (hereinafter referred to as “floor slab side interposing member”) is interposed between the hanging portion (32) and the upper surface (21a) of the floor slab,
The hanging portion (32) is pin-coupled to the floor slab side interposed member or the floor slab (21) by the hanging portion coupling member. The invention according to claim 2 is characterized in that, in the invention according to claim 1, the stud (3) is formed in a substantially T-shape or a substantially L-shape.

請求項３に係る発明は、請求項１又は２に係る発明において、前記水平部結合部材（４１）による前記水平部（３１）の前記梁中間部（２３ａ）への剛結は、該水平部（３１）と該梁中間部（２３ａ）とを接触させた状態、又は該水平部（３１）と該梁中間部（２３ａ）との間に他の部材を介装させた状態で行われたことを特徴とする。 The invention according to claim 3 is the invention according to claim 1 or 2 , wherein the horizontal portion (31) is rigidly connected to the beam intermediate portion (23a) by the horizontal portion coupling member (41). (31) and the intermediate beam portion (23a) are in contact with each other, or another member is interposed between the horizontal portion (31) and the intermediate beam portion (23a) . It is characterized by that.

請求項４に係る発明は、請求項１乃至３のいずれか１項に記載の発明において、前記垂下部結合部材及び前記水平部結合部材（４１）はアンカーボルトであることを特徴とする。 The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the drooping member and the horizontal member (41) are anchor bolts.

請求項５に係る発明は、床スラブ（２１）と、該床スラブ（２１）に立設される２本の柱（以下、「既設柱」とする）（２２）と、該２本の既設柱（２２）に架け渡されて前記床スラブ（２１）に対向するように該床スラブ（２１）の上方に配置される梁（２３）と、を備えた既設建物（２）を補強する、既設建物の耐震補強工法において、
前記梁（２３）の一部であって、前記２本の既設柱（２２）の間に位置して前記床スラブ（２１）に対向する部分（２３ａ）を「梁中間部」と定義した場合に、
略水平に延設される水平部（３１）と該水平部（３１）から垂下される垂下部（３２）とからなる間柱（３）を、前記水平部（３１）が前記梁中間部（２３ａ）に沿うと共に前記垂下部（３２）の下端が前記床スラブ（２１）の近傍に位置するようにして室内とベランダとの境界部分における開口（図３（ａ）の符号Ａ参照）と開口（Ａ）との間に配置する工程と、
前記水平部（３１）を前記梁中間部（２３ａ）に剛結する工程と、
前記垂下部（３２）を、前記床スラブ（２１）の上面側から該床スラブ（２１）の上面（２１ａ）に結合する工程と、を備え、
前記垂下部（３２）の前記床スラブの上面（２１ａ）への結合は、該垂下部（３２）と該床スラブの上面（２１ａ）とを接触させた状態、又は該垂下部（３２）と該床スラブの上面（２１ａ）との間に他の部材（以下、「床スラブ側介装部材」とする）を介装させた状態で行い、
前記垂下部（３２）は、前記垂下部結合部材によって前記床スラブ側介装部材又は前記床スラブ（２１）にピン結合することを特徴とする。 The invention according to claim 5 includes a floor slab (21), two columns (hereinafter referred to as “existing columns”) (22) standing on the floor slab (21), and the two existing columns. Reinforcing an existing building (2) comprising a beam (23) placed above the floor slab (21) so as to face the floor slab (21) across the pillar (22). In the seismic reinforcement method for existing buildings,
When a part (23a) which is a part of the beam (23) and is located between the two existing pillars (22) and faces the floor slab (21) is defined as a “beam intermediate part” In addition,
An intermediate column (3) composed of a horizontal portion (31) extending substantially horizontally and a hanging portion (32) hanging from the horizontal portion (31) is used as the horizontal portion (31). ) And the lower end of the drooping portion (32) is positioned in the vicinity of the floor slab (21), and an opening (see symbol A in FIG. 3A) and an opening at the boundary between the room and the veranda. (A) and the process of arrange | positioning between ,
Rigidly connecting the horizontal portion (31) to the beam intermediate portion (23a);
The hanging portion (32), Bei example a step of attaching the upper surface (21a) of the floor slab (21), from the upper surface of the floor slab (21),
The hanging portion (32) is joined to the upper surface (21a) of the floor slab in a state where the hanging portion (32) and the upper surface (21a) of the floor slab are in contact with each other, or the hanging portion (32) Performed in a state where another member (hereinafter referred to as “floor slab side interposed member”) is interposed between the upper surface (21a) of the floor slab,
The hanging portion (32) is pin-coupled to the floor slab side interposed member or the floor slab (21) by the hanging portion coupling member .

請求項６に係る発明は、請求項５に記載の発明において、前記間柱（３）は略Ｔ字状又は略Ｌ字状に形成されたことを特徴とする。 The invention according to claim 6 is characterized in that, in the invention according to claim 5, the stud (3) is formed in a substantially T-shape or a substantially L-shape.

なお、括弧内の番号などは、図面における対応する要素を示す便宜的なものであり、従って、本記述は図面上の記載に限定拘束されるものではない。 Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

請求項１乃至６に係る発明によれば、前記間柱の設置によって既設建物の耐震強度を高めることができる。また、本発明によれば、前記垂下部結合部材（つまり、前記床スラブの上面に前記垂下部を結合するための部材）が、前記床スラブの上面側に配置されていて、該結合を該床スラブの上面側にて行えるように構成されているので、
・前記水平部を前記梁中間部に剛結する作業、及び
・前記垂下部を前記床スラブの上面に結合する作業
の両方の作業を、いずれも、前記間柱を設置する居住空間から行うことができる。このため、上階（つまり、前記間柱を設置する居住空間の上の階）での作業や、下階（つまり、前記間柱を設置する居住空間の下の階）での作業を不要として、作業者の負担を軽減できると共に、上階や下階の居住者に負担や迷惑を掛けることも無いという効果を奏する。 According to the invention which concerns on Claims 1 thru | or 6 , the seismic strength of the existing building can be raised by installation of the said stud. Further, according to the present invention, the hanging part coupling member (that is, a member for coupling the hanging part to the upper surface of the floor slab) is disposed on the upper surface side of the floor slab, and the coupling is Since it is configured to be performed on the upper surface side of the floor slab,
-Both of the work of rigidly connecting the horizontal part to the intermediate part of the beam and the work of connecting the hanging part to the upper surface of the floor slab can be performed from the living space where the studs are installed. it can. Therefore, work on the upper floor (that is, the upper floor of the living space where the stud is installed) and work on the lower floor (that is, the lower floor of the living space where the stud is installed) are unnecessary, The burden on the upper floor and the lower floor can be reduced, and the burden on the upper floor and the lower floor can be prevented.

また、前記垂下部と前記床スラブとの結合をピン結合とすることで、該結合作業が簡単となり、作業負担を軽減することができる。 In addition , by using a pin connection between the hanging portion and the floor slab, the connection work is simplified and the work load can be reduced.

図１は、本発明に係る、既設建物の耐震補強構造の一例を示す斜視図である。FIG. 1 is a perspective view showing an example of a seismic reinforcement structure for an existing building according to the present invention. 図２は、本発明に係る、既設建物の耐震補強構造の他の例を示す斜視図である。FIG. 2 is a perspective view showing another example of the seismic reinforcement structure for an existing building according to the present invention. 図３(a) は、本発明に係る、既設建物の耐震補強構造のさらに他の例を示す正面図であり、同図(b)は、その断面図である。FIG. 3 (a) is a front view showing still another example of the seismic reinforcement structure for an existing building according to the present invention, and FIG. 3 (b) is a sectional view thereof. 図４は、本発明に係る、既設建物の耐震補強構造のさらに他の例を示す斜視図である。FIG. 4 is a perspective view showing still another example of the seismic reinforcement structure for an existing building according to the present invention. 図５(a)(b) は、間柱の形状の一例を示す正面図である。FIGS. 5A and 5B are front views showing an example of the shape of the studs. 図６(a)(b) (c) は、梁や既設柱の曲げモーメント等を示す図である。FIGS. 6 (a), 6 (b), and 6 (c) are diagrams showing bending moments of beams and existing columns. 図７は、既設建物の耐震補強構造の従来例を示す図である。FIG. 7 is a diagram showing a conventional example of an earthquake-proof reinforcement structure for an existing building.

以下、図１乃至図６に沿って、本発明の実施の形態について説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6.

本発明に係る、既設建物の耐震補強構造は、図１に符号１で例示するものであって、
・床スラブ２１と、
・該床スラブ２１に立設される２本の柱（以下、「既設柱」とする）２２と、
・該２本の既設柱２２に架け渡されて前記床スラブ２１に対向するように該床スラブ２１の上方に配置される梁２３と、
を備えた既設建物２を補強する構造である。 The seismic reinforcement structure of an existing building according to the present invention is illustrated by reference numeral 1 in FIG.
・ Floor slab 21;
Two pillars (hereinafter referred to as “existing pillars”) 22 erected on the floor slab 21;
A beam 23 arranged above the floor slab 21 so as to span the two existing pillars 22 and face the floor slab 21;
It is the structure which reinforces the existing building 2 provided with.

ここで、前記梁２３の一部であって、前記２本の既設柱２２の間に位置して前記床スラブ２１に対向する部分２３ａを「梁中間部」と定義すると、本発明に係る耐震補強構造１は、
・該梁中間部２３ａに沿って略水平に延設される水平部３１と、
・該水平部３１から前記床スラブ２１の近傍まで垂下される垂下部３２と、
を有する間柱３を備えている。そして、前記水平部３１は、前記梁中間部２３ａとの間で曲げモーメントが伝達されるように水平部結合部材４１によって前記梁中間部２３ａに剛結されており、前記垂下部３２は、垂下部結合部材４２によって前記床スラブ２１の上面２１ａに結合されている。さらに、この垂下部結合部材４２は、前記床スラブ２１の上面側に配置されていて、前記垂下部３２の前記床スラブ２１への結合を該床スラブ２１の上面側にて行えるように構成されている。 Here, if a portion 23a that is a part of the beam 23 and is located between the two existing pillars 22 and faces the floor slab 21 is defined as a “beam intermediate portion”, the seismic resistance according to the present invention is defined. The reinforcing structure 1 is
A horizontal portion 31 extending substantially horizontally along the beam intermediate portion 23a;
A hanging part 32 that hangs down from the horizontal part 31 to the vicinity of the floor slab 21;
A stud 3 having The horizontal portion 31 is rigidly connected to the beam intermediate portion 23a by a horizontal portion coupling member 41 so that a bending moment is transmitted to the beam intermediate portion 23a. It is connected to the upper surface 21 a of the floor slab 21 by a part connecting member 42. Further, the drooping member 42 is arranged on the upper surface side of the floor slab 21 so that the drooping member 32 can be coupled to the floor slab 21 on the upper surface side of the floor slab 21. ing.

この場合、前記水平部結合部材４１による前記水平部３１の前記梁中間部２３ａへの剛結は、
・該水平部３１と該梁中間部２３ａとを接触させた状態、又は
・該水平部３１と該梁中間部２３ａとの間に他の部材（不図示。以下、「梁側介装部材」とする）を介装させた状態
のいずれかで行うと良い。また、前記垂下部結合部材４２による前記垂下部３２の前記床スラブ２１の上面２１ａへの結合は、
・該垂下部３２と該床スラブ２１の上面２１ａとを接触させた状態、又は
・該垂下部３２と該床スラブ２１の上面２１ａとの間に他の部材（不図示。以下、「床スラブ側介装部材」とする）を介装させた状態
のいずれかで行うと良い。ここで、前記梁側介装部材としては、板状の部材や公知の部材を挙げることができる。また、前記床スラブ側介装部材としては、板状の部材や公知の部材を挙げることができる。 In this case, the horizontal connection of the horizontal part 31 to the beam intermediate part 23a by the horizontal part connecting member 41 is as follows.
A state in which the horizontal portion 31 and the beam intermediate portion 23a are in contact with each other, or another member (not shown; hereinafter referred to as “beam side interposed member”) between the horizontal portion 31 and the beam intermediate portion 23a. It may be performed in any of the states in which the Further, the coupling of the hanging part 32 to the upper surface 21a of the floor slab 21 by the hanging part coupling member 42 is as follows.
A state in which the hanging portion 32 and the upper surface 21a of the floor slab 21 are in contact with each other, or another member (not shown; hereinafter referred to as “floor slab”) between the hanging portion 32 and the upper surface 21a of the floor slab 21 It may be performed in any of the states in which the “side-insertion member” is interposed. Here, examples of the beam-side interposed member include a plate-like member and a known member. In addition, examples of the floor slab side interposed member include a plate-like member and a known member.

ところで、前記垂下部結合部材４２は、地震発生時に前記梁２３から前記水平部３１に曲げモーメントが伝達されたとしても前記垂下部３２（正確には、該垂下部３２の下端部）が矢印Ｆで示す方向に前記床スラブ２１の上面２１ａに沿って移動しないように該垂下部３２を結合するものであれば良い。図１に示す垂下部結合部材４２は、前記垂下部３２と前記既設柱２２との間に配置された棒状部材であるが、もちろんこれに限られるものではなく、例えば、該垂下部結合部材を、
・図２に符号１４２で示すように、床スラブ２１に固定されて前記垂下部３２の移動を規制するような部材としても、或いは、
・アンカーボルト等の公知の部材として、
どちらでも良い。また、垂下部結合部材によって、前記垂下部３２を前記床スラブ側介装部材又は前記床スラブ２１にピン結合（つまり、せん断力のみが伝達されて曲げモーメントが伝達されないような結合）するようにしても良く、或いは曲げモーメントが多少は伝達される程度の簡単な結合（剛結）としても良い。地震発生時に前記垂下部３２（正確には、該垂下部３２の下端部）が前記床スラブ２１の上面に沿って移動しなければ、前記梁中間部２３ａの曲げモーメントは低減されずに建物の剛性を高めて、該建物の耐震補強をすることができる。また、前記垂下部３２と前記床スラブ２１との結合をピン結合又は簡単な結合とすることで、該結合作業が簡単となり、作業負担を軽減することができる。なお、該間柱３を、室内とベランダとの境界部分に配置する場合は、符号４１や符号４２に示す垂下部結合部材はベランダ側開口（図３(a) の符号Ａ参照）の下縁に配置されることとなるが、該開口Ａを出入りする人が躓かないようにそれらの垂下部結合部材を低くしておくと良い。 By the way, even if a bending moment is transmitted from the beam 23 to the horizontal portion 31 when an earthquake occurs, the hanging portion coupling member 42 has the hanging portion 32 (precisely, the lower end portion of the hanging portion 32) has an arrow F. What is necessary is just to couple | bond the drooping part 32 so that it may not move along the upper surface 21a of the said floor slab 21 in the direction shown by. The hanging part coupling member 42 shown in FIG. 1 is a rod-shaped member disposed between the hanging part 32 and the existing column 22, but is not limited to this. For example, the hanging part coupling member may be ,
2 as a member that is fixed to the floor slab 21 and restricts the movement of the hanging portion 32, as indicated by reference numeral 142 in FIG.
・ As well-known members such as anchor bolts,
both are fine. Further, the hanging part 32 is pin-coupled to the floor slab side interposed member or the floor slab 21 by the hanging part coupling member (that is, the coupling so that only the shearing force is transmitted and the bending moment is not transmitted). Alternatively, it may be a simple connection (rigid connection) in which a bending moment is transmitted to some extent. If the drooping portion 32 (more precisely, the lower end of the drooping portion 32) does not move along the upper surface of the floor slab 21 when an earthquake occurs, the bending moment of the beam intermediate portion 23a is not reduced and the building It is possible to increase the rigidity and to provide seismic reinforcement for the building. In addition, the coupling between the hanging portion 32 and the floor slab 21 is a pin coupling or a simple coupling, thereby simplifying the coupling operation and reducing the work load. When the spacer 3 is arranged at the boundary between the room and the veranda, the drooping member shown by reference numerals 41 and 42 is provided at the lower edge of the veranda-side opening (see reference numeral A in FIG. 3 (a)). Although it will be arranged, it is good to keep those hanging part coupling members low so that the person who goes in and out of the opening A does not hesitate.

また、上述の水平部結合部材４１としてはアンカーボルト等の公知の結合部材を挙げることができる。 Moreover, as the above-described horizontal portion coupling member 41, a known coupling member such as an anchor bolt can be used.

本発明によれば、前記間柱３の設置によって既設建物の耐震強度を高めることができる。 According to the present invention, the seismic strength of the existing building can be increased by the installation of the stud 3.

ところで、上述の既設柱２２は、住戸と住戸との境界部分に立設されているのが一般的であり、該既設柱２２の近傍（ベランダ側）には避難用のパーティション（不図示）が配置されているのが一般的である。このような構成の既設建物２において、仮に、上述の間柱３を該既設柱２２に沿って配置しようとすると避難経路が狭くなって好ましくない。これに対し、本発明によれば、前記間柱３は、前記２本の既設柱２２の間に位置する梁中間部２３ａから垂下されるように配置されているため、住戸と住戸との境界部分の避難経路が狭くなることが無く、安全上も好ましい。 By the way, the above existing pillar 22 is generally erected at the boundary between the dwelling unit and the dwelling unit, and an evacuation partition (not shown) is provided in the vicinity (on the veranda side) of the existing column 22. Generally it is arranged. In the existing building 2 having such a configuration, if the above-described intermediate pillar 3 is to be arranged along the existing pillar 22, the evacuation route becomes narrow, which is not preferable. On the other hand, according to the present invention, the inter-column 3 is arranged to be suspended from the beam intermediate portion 23a located between the two existing columns 22, so that the boundary portion between the dwelling unit and the dwelling unit The evacuation route is not narrowed, which is preferable in terms of safety.

さらに、本発明によれば、前記垂下部結合部材４２（つまり、前記床スラブ２１の上面２１ａに前記垂下部３２を結合するための部材）が、前記床スラブ２１の上面側に配置されていて、該結合を該床スラブ２１の上面側にて行えるように構成されているので、
・前記水平部３１を前記梁中間部２３ａに剛結する作業、及び
・前記垂下部３２を前記床スラブ２１の上面２１ａに結合する作業
の両方の作業を、いずれも、前記間柱３を設置する居住空間から行うことができる。このため、上階（つまり、前記間柱３を設置する居住空間の上の階）での作業や、下階（つまり、前記間柱３を設置する居住空間の下の階）での作業を不要として、作業者の負担を軽減できると共に、上階や下階の居住者に負担や迷惑を掛けることも無いという効果を奏する。 Furthermore, according to the present invention, the drooping member 42 (that is, a member for coupling the drooping portion 32 to the upper surface 21a of the floor slab 21) is disposed on the upper surface side of the floor slab 21. Since it is configured so that the coupling can be performed on the upper surface side of the floor slab 21,
Both of the work of rigidly connecting the horizontal part 31 to the beam intermediate part 23a and the work of connecting the hanging part 32 to the upper surface 21a of the floor slab 21 are used to install the stud 3. This can be done from the living space. For this reason, work on the upper floor (that is, the upper floor of the living space where the stud 3 is installed) and work on the lower floor (that is, the floor below the living space where the stud 3 is installed) are unnecessary. As a result, the burden on the operator can be reduced, and there is no effect on the residents on the upper and lower floors.

ここで、少なくとも一部の壁面が前記梁中間部２３ａの下方又は該下方の近傍に配置されるように、前記床スラブ２１に壁部材が立設されている場合について説明する。例えば、
・図３(a)
(b) に示すように、ベランダ側開口Ａを仕切る方立壁５の壁面５ａが前記梁中間部２３ａの下方又は該下方の近傍に配置されている場合、或いは、
・図４に示すように、部屋と部屋とを仕切る仕切り壁１５の側端壁１５ａが前記梁中間部２３ａの下方又は該下方の近傍に配置されている場合
には、前記垂下部３２が前記壁面５ａ、５ａに沿って垂下されるように前記間柱３を配置すると良い。そのようにした場合には、該壁部材５，１５と前記既設柱２２との間の開口（例えば、図３(a) に符号Ａで示すような、室内とベランダとをつなぐ開口）に前記間柱３が配置されることは無いので、既存の動線（つまり、該開口Ａを通り抜けるという動線）を維持できる。また、前記垂下部３２が前記方立壁５や前記仕切壁１５に隠されることとなるので、居住者が感じる圧迫感を低減することができる。 Here, a case will be described in which a wall member is erected on the floor slab 21 so that at least a part of the wall surface is disposed below or in the vicinity of the lower portion of the beam intermediate portion 23a. For example,
・ Figure 3 (a)
As shown in (b), when the wall surface 5a of the standing wall 5 that partitions the veranda side opening A is disposed below or in the vicinity of the lower part of the beam intermediate portion 23a, or
As shown in FIG. 4, when the side end wall 15a of the partition wall 15 that separates the rooms is disposed below or near the beam intermediate portion 23a, the hanging portion 32 is The stud 3 may be arranged so as to hang along the wall surfaces 5a and 5a. In such a case, the opening between the wall members 5 and 15 and the existing pillar 22 (for example, the opening connecting the room and the veranda as indicated by the symbol A in FIG. Since the stud 3 is not disposed, the existing flow line (that is, the flow line passing through the opening A) can be maintained. Moreover, since the said drooping part 32 will be hidden by the said standing wall 5 and the said partition wall 15, the feeling of pressure which a resident feels can be reduced.

さらに、上述のように間柱３（前記垂下部３２）を前記壁部材５，１５の前記壁面５ａ，１５ａに沿って配置する場合には、該垂下部３２の下端部近傍を前記垂下部結合部材（例えば、アンカーボルト）によって該壁部材５，１５の前記壁面５ａ，１５ａに結合すると良い。なお、該垂下部３２と該壁部材５，１５との間に隙間が生じてしまうような場合にはそれらの間に板状の部材（図３(b) の符号６参照）を挟んで該垂下部３２を該壁部材５，１５に固定するようにすると良い。 Further, when the stud 3 (the hanging portion 32) is disposed along the wall surfaces 5a and 15a of the wall members 5 and 15 as described above, the vicinity of the lower end portion of the hanging portion 32 is placed on the hanging portion coupling member. The wall members 5 and 15 may be coupled to the wall surfaces 5a and 15a (for example, anchor bolts). When a gap is generated between the hanging portion 32 and the wall members 5 and 15, a plate-like member (see reference numeral 6 in FIG. 3 (b)) is sandwiched between them. The drooping portion 32 may be fixed to the wall members 5 and 15.

ところで、図１乃至４に示す間柱３の形状（正面から見た形状）は、前記水平部３１と前記垂下部３２とによって形成されたＴ字形であるが（図５(a) 参照）、もちろんこれに限られるものではなく、図５(b) に示すような形状としても良い。 Incidentally, the shape of the stud 3 shown in FIGS. 1 to 4 (the shape seen from the front) is a T-shape formed by the horizontal portion 31 and the hanging portion 32 (see FIG. 5A). The shape is not limited to this, and a shape as shown in FIG.

一方、本発明に係る、既設建物の耐震補強工法は、
・床スラブ２１と、
・該床スラブ２１に立設される２本の既設柱２２と、
・該２本の既設柱２２に架け渡されて前記床スラブ２１に対向するように該床スラブ２１の上方に配置される梁２３と、
を備えた既設建物２を補強する工法である。そして、該工法は、略水平に延設される水平部３１と該水平部３１から垂下される垂下部３２とからなる間柱３を配置する工程を備えている。その配置は、前記水平部３１が前記梁中間部２３ａ（つまり、前記梁２３の一部であって、前記２本の既設柱２２の間に位置して前記床スラブ２１に対向する部分２３ａ）に沿うと共に前記垂下部３２の下端が前記床スラブ２１の近傍に位置するように行われる。さらに、本発明に係る耐震補強工法は、
・前記水平部３１を前記梁中間部２３ａに剛結する工程と、
・前記垂下部３２を、前記床スラブ２１の上面側から該床スラブ２１の上面２１ａに結合する工程と、
を備えている。 On the other hand, the seismic reinforcement method for existing buildings according to the present invention is as follows.
・ Floor slab 21;
Two existing pillars 22 erected on the floor slab 21;
A beam 23 arranged above the floor slab 21 so as to span the two existing pillars 22 and face the floor slab 21;
This is a method of reinforcing an existing building 2 equipped with And this construction method is provided with the process of arrange | positioning the stud 3 which consists of the horizontal part 31 extended substantially horizontally and the hanging part 32 suspended from this horizontal part 31. As shown in FIG. In the arrangement, the horizontal portion 31 is the beam intermediate portion 23a (that is, a portion 23a that is a part of the beam 23 and is positioned between the two existing pillars 22 and faces the floor slab 21). And the lower end of the drooping portion 32 is positioned in the vicinity of the floor slab 21. Furthermore, the seismic reinforcement method according to the present invention is:
A step of rigidly connecting the horizontal portion 31 to the beam intermediate portion 23a;
Connecting the hanging portion 32 from the upper surface side of the floor slab 21 to the upper surface 21a of the floor slab 21;
It has.

この場合、前記水平部３１の前記梁中間部２３ａへの剛結は、
・該水平部３１と該梁中間部２３ａとを接触させた状態、又は
・該水平部３１と該梁中間部２３ａとの間に前記梁側介装部材（不図示）を介装させた状態
のいずれかで行うと良い。また、前記垂下部３２の前記床スラブ２１の上面２１ａへの結合は、
・該垂下部３２と該床スラブ２１の上面２１ａとを接触させた状態、又は
・該垂下部３２と該床スラブ２１の上面２１ａとの間に前記床スラブ側介装部材（不図示）を介装させた状態
のいずれかで行うと良い。ここで、前記梁側介装部材としては、板状の部材や公知の部材を挙げることができる。また、前記床スラブ側介装部材としては、板状の部材や公知の部材を挙げることができる。 In this case, the rigid connection of the horizontal portion 31 to the beam intermediate portion 23a is as follows.
A state in which the horizontal portion 31 and the beam intermediate portion 23a are in contact with each other, or a state in which the beam-side interposed member (not shown) is interposed between the horizontal portion 31 and the beam intermediate portion 23a. It is better to do either. Further, the coupling of the hanging portion 32 to the upper surface 21a of the floor slab 21 is as follows.
A state in which the hanging portion 32 and the upper surface 21a of the floor slab 21 are in contact with each other, or the floor slab side interposed member (not shown) is placed between the hanging portion 32 and the upper surface 21a of the floor slab 21. It is good to carry out in either of the states where it interposes. Here, examples of the beam-side interposed member include a plate-like member and a known member. In addition, examples of the floor slab side interposed member include a plate-like member and a known member.

さらに、上述のように間柱３（前記垂下部３２）を前記前記壁部材５，１５の前記壁面５ａ，１５ａに沿って配置する場合には、該垂下部３２の下端部近傍を前記垂下部結合部材（例えば、アンカーボルト）によって該壁部材５，１５の前記壁面５ａ，１５ａに結合すると良い。 Further, when the stud 3 (the hanging portion 32) is disposed along the wall surfaces 5a and 15a of the wall members 5 and 15 as described above, the vicinity of the lower end portion of the hanging portion 32 is connected to the hanging portion. It is good to couple | bond with the said wall surface 5a, 15a of this wall member 5,15 with a member (for example, anchor bolt).

以下、前記梁２３や前記既設柱２２等にかかるせん断力や曲げモーメントについて説明する。 Hereinafter, the shearing force and bending moment applied to the beam 23, the existing column 22 and the like will be described.

所定の大きさの地震が発生した場合に１本の既設柱２２に生じるせん断力をＱｃとすると、２本の既設柱２２に関し、

となる場合に、上述のような耐震補強が必要とされる。上述のように間柱３を設置した場合であって、地震発生時において該間柱３に生じるせん断力Ｑａが下記関係式を満足する場合には、該間柱３による補強は有効であるということになる。

If the shearing force generated in one existing pillar 22 when an earthquake of a predetermined magnitude occurs is Qc,

In such a case, seismic reinforcement as described above is required. When the stud 3 is installed as described above, and the shearing force Qa generated in the stud 3 at the time of the earthquake satisfies the following relational expression, the reinforcement by the stud 3 is effective. .

この場合のせん断力Ｑａは、前記水平部結合部材４１及び前記垂下部結合部材４２等を介して既設建物２に伝達され、既設建物２の耐力は、前記間柱３を１本設置するごとに前記Ｑａだけ増加することとなる。ここで、該間柱３を設置していない場合における前記梁２３のせん断力をＱｂ１とし（図６(a) 参照）、該間柱３を設置している場合における前記梁２３のせん断力をＱｂ２とすると（同図(b) 参照）、該間柱３の設置により梁２３のスパンが短くなるので、Ｑｂ２＞Ｑｂ１となる。既設の梁２３が保有するせん断耐力Ｑｂｕが前記Ｑｂ２よりも大きい場合には、前記既設柱２２及び前記間柱３がせん断耐力に達する前に前記梁２３がせん断耐力に達することはない。 In this case, the shearing force Qa is transmitted to the existing building 2 through the horizontal portion coupling member 41 and the hanging portion coupling member 42, and the proof stress of the existing building 2 is the above-mentioned every time one of the studs 3 is installed. It will increase by Qa. Here, the shearing force of the beam 23 when the stud 3 is not installed is Qb1 (see FIG. 6A), and the shearing force of the beam 23 when the stud 3 is installed is Qb2. Then (see FIG. 5B), the span of the beam 23 is shortened by the installation of the stud 3, so that Qb2> Qb1. When the shear strength Qbu possessed by the existing beam 23 is larger than Qb2, the beam 23 does not reach the shear strength before the existing columns 22 and the inter-columns 3 reach the shear strength.

また、地震発生時における梁２３の曲げモーメント分布は、前記間柱３を設置していない場合には図６(a) に符号Ｍ１で示すようになり、梁２３の端部では曲げモーメントが大きくなり（Ｍ１ｍａｘ参照）、梁２３に生じるせん断力はＱｂ１になる。これに対し、本発明では、前記２本の既設柱２２の間に位置する梁中間部２３ａに前記間柱３（具体的には、前記水平部３１）を剛結しているため、梁２３の曲げモーメント図は図６(b)
に符号Ｍ２で示すようになり、梁２３に生じるせん断力はＱｂ２になる。つまり、本発明は前記梁２３のせん断力（Ｑｂ２）が保有耐力（Ｑｂｕ）を超えない範囲において、新設した間柱３の水平耐力（間柱３の本数分の水平耐力）を層の水平耐力に付加することで、その層の耐力を高めるようにしたものである。 In addition, the bending moment distribution of the beam 23 at the time of the earthquake is as shown by a symbol M1 in FIG. 6A when the stud 3 is not installed, and the bending moment increases at the end of the beam 23. (See M1max), the shearing force generated in the beam 23 is Qb1. On the other hand, in the present invention, since the inter-column 3 (specifically, the horizontal portion 31) is rigidly connected to the beam intermediate portion 23a located between the two existing columns 22, the beam 23 Figure 6 (b) shows the bending moment diagram.
And the shearing force generated in the beam 23 is Qb2. In other words, the present invention adds the horizontal strength of the newly installed studs 3 (the horizontal strength of the number of the studs 3) to the horizontal strength of the layer in the range where the shearing force (Qb2) of the beam 23 does not exceed the retained strength (Qbu). By doing so, the proof stress of the layer is increased.

一方、前記間柱３の、地震発生時における曲げモーメント分布は、前記垂下部結合部材４２による結合がピン結合であるか剛結であるかによって異なり、ピン結合の場合は図６(b) に符号Ｍ３で示すようになり、剛結の場合は図６(c) に符号Ｍ４で示すようになる。なお、該間柱３をピン結合する場合の結合強度は前記せん断力Ｑａを考慮して決定し、前記間柱３を剛結する場合の結合強度は前記せん断力Ｑａ及び前記曲げモーメントＭ４を考慮して決定すれば良い。 On the other hand, the bending moment distribution of the stud 3 when an earthquake occurs differs depending on whether the connection by the hanging member 42 is a pin connection or a rigid connection. This is indicated by M3, and in the case of rigid connection, it is indicated by reference numeral M4 in FIG. 6 (c). It should be noted that the coupling strength when pinning the stud 3 is determined in consideration of the shearing force Qa, and the coupling strength when coupling the stud 3 is based on the shearing force Qa and the bending moment M4. Just decide.

１耐震補強構造
２既設建物
３間柱
５壁部材（方立壁）
５ａ壁部材の壁面
１５壁部材（仕切り壁）
１５ａ壁部材の壁面（仕切り壁の側端壁）
２１床スラブ
２１ａ前記床スラブの上面
２２既設柱
２３梁
２３ａ梁中間部
３１水平部
３２垂下部
４１水平部結合部材
４２垂下部結合部材 1 Seismic strengthening structure 2 Existing building 3 Space pillar 5 Wall member (standing wall)
5a Wall surface of wall member 15 Wall member (partition wall)
15a Wall surface of the wall member (side wall of the partition wall)
21 Floor slab 21a Upper surface of the floor slab 22 Existing column 23 Beam 23a Beam intermediate portion 31 Horizontal portion 32 Hanging portion 41 Horizontal portion coupling member 42 Hanging portion coupling member

Claims

A floor slab, two pillars standing on the floor slab (hereinafter referred to as “existing pillars”), and the floor slab so as to span the two existing pillars and face the floor slab In the seismic reinforcement structure of an existing building, which reinforces an existing building with a beam disposed above
When a part of the beam, which is located between the two existing columns and faces the floor slab, is defined as a “beam intermediate part”,
An opening and an opening at a boundary portion between the room and the veranda, and a horizontal portion extending substantially horizontally along the intermediate portion of the beam, and a hanging portion hanging from the horizontal portion to the vicinity of the floor slab. A stud arranged between
A horizontal portion coupling member for rigidly connecting the horizontal portion to the beam intermediate portion;
A drooping coupling member for coupling the drooping part to the upper surface of the floor slab;
With
The drooping member is arranged on the upper surface side of the floor slab, and is configured so that the drooping member can be coupled to the floor slab on the upper surface side of the floor slab ,
The coupling of the hanging portion to the upper surface of the floor slab by the hanging portion coupling member is in a state where the hanging portion and the upper surface of the floor slab are in contact, or between the hanging portion and the upper surface of the floor slab. It is performed in a state where other members (hereinafter referred to as “floor slab side interposed members”) are interposed,
The hanging portion is pin-coupled to the floor slab side interposed member or the floor slab by the hanging portion coupling member,
A seismic reinforcement structure for existing buildings.

The studs are formed in a substantially T shape or a substantially L shape,
The earthquake-proof reinforcement structure of the existing building of Claim 1 characterized by the above-mentioned.

The horizontal portion is rigidly connected to the intermediate portion of the beam by the horizontal portion coupling member in a state where the horizontal portion and the intermediate portion of the beam are in contact with each other or between the horizontal portion and the intermediate portion of the beam. It was performed in a state of being interposed member,
The earthquake-proof reinforcement structure of the existing building of Claim 1 or 2 characterized by the above-mentioned.

The hanging part coupling member and the horizontal part coupling member are anchor bolts,
The seismic reinforcement structure for an existing building according to any one of claims 1 to 3 .

A floor slab, two pillars standing on the floor slab (hereinafter referred to as “existing pillars”), and the floor slab so as to span the two existing pillars and face the floor slab In the seismic reinforcement method for existing buildings, which reinforces existing buildings with beams arranged above
When a part of the beam, which is located between the two existing columns and faces the floor slab, is defined as a “beam intermediate part”,
An inter-column consisting of a horizontal portion extending substantially horizontally and a hanging portion suspended from the horizontal portion, the horizontal portion being along the beam intermediate portion, and the lower end of the hanging portion being positioned in the vicinity of the floor slab. Thus, the step of arranging between the opening in the boundary portion between the room and the veranda ,
Rigidly connecting the horizontal portion to the beam intermediate portion;
Coupling the hanging portion from the upper surface side of the floor slab to the upper surface of the floor slab;
Bei to give a,
The hanging part is coupled to the upper surface of the floor slab by contacting the hanging part with the upper surface of the floor slab or between the hanging part and the upper surface of the floor slab. "With a floor slab side member"),
The hanging portion is pin-coupled to the floor slab side interposed member or the floor slab by the hanging portion coupling member,
A seismic reinforcement method for existing buildings.

The studs are formed in a substantially T shape or a substantially L shape,
The seismic reinforcement method for an existing building according to claim 5.