JP3984572B2

JP3984572B2 - Thin plate lightweight shape steel wall panel upper reinforcement structure

Info

Publication number: JP3984572B2
Application number: JP2003202215A
Authority: JP
Inventors: 繁明藤内; 喜満村橋; 良道河合; 浩史田中
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2003-07-28
Filing date: 2003-07-28
Publication date: 2007-10-03
Anticipated expiration: 2023-07-28
Also published as: JP2005042369A; TW200626771A; TWI264486B

Description

【０００１】
【発明の属する技術分野】
本発明は、板厚１ｍｍ前後の薄板軽量形鋼による枠材と構造用面材を溶接接合やボルト接合することなく、タッピングネジ接合を用いて構築される薄板軽量形鋼造（以下、「スチールハウス」という。）の壁パネル上部の補強構造に関する。
【０００２】
【従来の技術】
従来、地震等の水平力が作用した際のスチールハウスにおける壁パネルの剛性、水平耐力を高める手段として、壁パネルそのものの剛性、水平耐力を上げるとともに、壁パネル脚部のアンカーボルトやスタッドについても増大する軸力に対して抵抗するための補強をする必要があった。
従来、地震等の水平力が作用した際のスチールハウスにおける壁パネルの水平抵抗力を高める手段として、壁パネル上部の回転を拘束するという解決策は存在しなかった。
【０００３】
【特許文献１】
特開２００２−７０１７５号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、壁パネルが高さ方向に複層に重なると、地震等の水平力が作用した場合、転倒モーメントが累加され、壁パネル脚部のアンカーボルトやスタッドに加わる軸力が過大になるこの対策として、壁パネルの変形を低減するために壁パネルの剛性を向上させることや、壁パネルを基礎等に固定するアンカーボルトやスタッドの本数を増やすこと等が考えられるが、このような対策では、スチールハウスを構築するためのコストに影響し、また、建物全体の層間変形角も過大となり、建築基準法で定める制限値を満足できなくなるという問題が発生する。
特に、３階建て以上のスチールハウス構造の実現には、アンカーボルト、スタッドに発生する大きな軸力の処理と層間変形角の抑制が大きな問題となってくる。
【０００５】
本発明は、地震等により水平力が作用した際、壁パネル脚部に作用する軸力を低減し、併せて建物全体の水平剛性を高め、且つ層間変形角を低減する低コストの３階建て以上のスチールハウス構造を実現可能とする壁パネル間の開口部上部の補強構造を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本第１発明は、前記課題を解決するために、薄板軽量形鋼造の壁パネル間の開口部上部に配置される境界梁（１）について２つの薄板軽量形鋼（２）をその開口側を向かい合わせとして配置し、前記境界梁（１）を構成する２つの前記薄型軽量形鋼（２）内部に、薄板軽量形鋼で形成される圧縮補強材（３）を縦方向に向けて配置し、上下の薄板軽量形鋼で形成される壁パネル（４）にホールダウン金物とアンカーボルト（５）により固定し、更に薄板軽量形鋼からなる補強境界梁（７）を前記境界梁（１）と平行に一体に連結することにより境界梁の曲げ剛性を高め、地震等の水平力が作用した際の壁パネル脚部に加わる軸力を低減することを特徴とする。
【０００７】
本第２発明は、本第１発明の板軽量形鋼造の壁パネル上部補強構造において、前記補強境界梁（７）は、２つの薄板軽量形鋼をボックス形に組み合わせて形成され、前記境界梁（１）にタッピングネジ（８）により固定されていることを特徴とする。
また、本第３発明は、本第１又は第２発明の板軽量形鋼造の壁パネル上部補強構造において、前記境界梁（１）の両端は、シアプレート(１１)を介して連結されていることを特徴とする。
【０００８】
【発明の実施の形態】
本発明の実施の形態を図により説明する。
図３は、従来のスチールハウスの壁パネル上部構造を示すもので、薄板軽量形鋼で形成される壁パネル間の上部に配置される１つの薄板軽量形鋼２で形成される境界梁１が、２つの薄板軽量形鋼のフランジ同士を当接した圧縮補強材３を境界梁１を構成する薄板軽量形鋼２内に縦方向に向けて配置し、薄板軽量形鋼で形成される壁パネル４にホールダウン金物（図示せず）とアンカーボルト５により固定する。従来技術においては、境界梁１が１つの薄板軽量形鋼２で形成されているため、圧縮補強材３を介して壁パネル４への固定の際、圧縮補強材３の端部の一部が直接接触し、床パネルの面材へめり込むのを防止するため、上下に薄板で形成される帯板６を配置したものである。
【０００９】
図１は、本発明のスチールハウスの壁パネル間の開口部上部補強構造の一実施形態を示す斜視図である。この実施形態においては、薄板軽量形鋼で形成される壁パネル４間の上部に配置される境界梁１を、２つの薄板軽量形鋼２をその開口側を向かい合わせとして境界梁１の曲げ剛性、耐力を高めたものである。境界梁１は、薄板軽量形鋼で形成される圧縮補強材３を境界梁１の２つの薄板軽量形鋼２内部に縦方向に向けて配置し、上下の薄板軽量形鋼で形成される壁パネル４にホールダウン金物とアンカーボルト５により固定する。圧縮補強材３が境界梁１を構成する２つの薄板軽量形鋼２の内部に配置されるため、圧縮補強材３の端部が直接接触しないので、床パネルの面材へめり込みがなく、従来技術において必要としためり込み防止用の帯板６の配置を省略できる。
【００１０】
図２は、本発明のスチールハウスの壁パネル４間の開口部上部補強構造の他の実施形態を示す断面図である。この実施形態においては、薄板軽量形鋼で形成される壁パネル４間の上部に配置される境界梁１を、２つの薄板軽量形鋼２をその開口側を向かい合わせとして構成し、さらに、この境界梁１と平行に延びる２つの薄板軽量形鋼をボックス形に組み合わせて形成される補強境界梁７を境界梁１にタッピングネジ８により固定し、境界梁１の曲げ剛性、耐力をさらに高めたものである。
境界梁１は、薄板軽量形鋼で形成される圧縮補強材３を境界梁１の２つの薄板軽量形鋼２内部に配置し、上下の薄板軽量形鋼で形成される壁パネル４にホールダウン金物とアンカーボルト５により固定する。上壁パネル４と境界梁１との間には床材９の端部が配置され、ホールダウン金物とアンカーボルト５により固定される。
【００１１】
図４（ａ）は、従来、境界梁１の両端を単なるネジ接合により連結していたため、地震等の水平力が作用すると、境界梁１の両端間にせん断ズレが生じ、境界梁１の回転角が大きくなるという問題を有するものであった。
図４（ｂ）は、境界梁１の両端をせん断力を伝達できるシアプレート１１を介して連結することにより、地震等の水平力が作用した際のせん断ズレを防止し、境界梁１の回転角を小さくするようにしたものである。
【００１２】
図５（ａ）（ｂ）は、図３に示される従来技術のスチールハウスの壁パネル上部に水平力が作用した状態を示す模式図と、水平力が作用した時の開口部に発生するモーメント分布を示す図である。
壁パネル４の脚部が基礎１２に、ホールダウン金物とアンカーボルト５を介して固定され、壁パネル４間の開口部１３の上部に境界梁１が配置される。境界梁１の曲げ剛性が低く、境界梁１の両端の接合が弱く壁パネル４上部と境界梁１との接合がネジで接合されているだけのため、地震等による水平力が作用すると、境界梁１が曲げ応力を負担しないため、壁パネル４の脚部に大きな軸力が発生する。
【００１３】
図６（ａ）（ｂ）は、図１、２及び図４（ｂ）に示される本発明の実施形態のスチールハウスの壁パネル４上部に水平力が作用した状態を示す模式図と、水平力が作用した時の壁パネル４に発生するモーメント分布を示す図である。
境界梁１の曲げ剛性を向上させるとともに、境界梁１の両端がシアプレート１１を介して接合されているため、壁パネル４に水平力が作用した時、壁パネル４の脚部に発生する軸力は、従来のものに比較し、６０〜８０％に低減できる。
【００１４】
【発明の効果】
本発明の壁パネル間の開口部の上部に曲げ剛性が高い境界梁を配置する構成により、地震等の水平力が作用した時、壁パネル脚部に加わる軸力を低減し、壁パネル脚部と基礎との間を連結するアンカーボルト等を増加しなくて済み、且つ、建物全体の水平剛性を増加させ、層間変形角を低減できる。
本発明の境界梁に薄板軽量形鋼からなる補強境界梁を平行に一体に連結し境界梁の曲げ剛性を高める構成により、スチールハウスの基本原則である全ての構造を薄板軽量形鋼で形成することを遵守しつつ境界梁を補強可能であるので、タッピングネジによる固定が可能であり、施工性がよい。
本発明の境界梁の両端をシアプレートを介して連結することにより開口部上部の回転を拘束する構成により、地震等の水平力が作用した時、境界梁の回転を拘束し、壁パネル脚部に加わる軸力を低減できる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す図である。
【図２】本発明の実施形態を示す図である。
【図３】従来技術を示す図である。
【図４】（ａ）（ｂ）は、従来技術と本発明の実施形態を示す図である。
【図５】（ａ）（ｂ）は、従来技術を示す図である。
【図６】（ａ）（ｂ）は、本発明の実施形態を示す図である。
【符号の説明】
１：境界梁
２：薄板軽量形鋼
３：圧縮補強材
４：壁パネル
５：アンカーボルト
６：帯板
７：補強境界梁
８：タッピングネジ
９：床材
１１：シアプレート
１２：基礎
１３：開口部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thin and lightweight steel structure (hereinafter referred to as “steel”) that is constructed using tapping screw bonding without welding or bolting the frame material and the structural face material made of thin and light steel having a thickness of about 1 mm. This is related to the reinforcement structure of the upper part of the wall panel.
[0002]
[Prior art]
Conventionally, as a means to increase the rigidity and horizontal strength of wall panels in steel houses when horizontal forces such as earthquakes act, the rigidity and horizontal strength of the wall panels themselves are increased, and anchor bolts and studs on the wall panel legs are also used. There was a need to reinforce to resist increasing axial forces.
Conventionally, there has been no solution to restrain the rotation of the upper part of the wall panel as a means for increasing the horizontal resistance of the wall panel in the steel house when a horizontal force such as an earthquake acts.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-70175
[Problems to be solved by the invention]
However, if the wall panel overlaps with multiple layers in the height direction, if a horizontal force such as an earthquake is applied, the overturning moment is accumulated and the axial force applied to the anchor bolts and studs on the wall panel legs is excessive. As such, it is possible to improve the rigidity of the wall panel in order to reduce the deformation of the wall panel, increase the number of anchor bolts and studs that fix the wall panel to the foundation, etc., but with such measures, This affects the cost for constructing a steel house, and the interlaminar deformation angle of the entire building becomes excessive, resulting in a problem that the limit value defined by the Building Standards Act cannot be satisfied.
In particular, in order to realize a steel house structure having three or more stories, processing of a large axial force generated in anchor bolts and studs and suppression of interlayer deformation angles become major problems.
[0005]
The present invention reduces the axial force acting on the wall panel legs when a horizontal force is applied due to an earthquake, etc., and at the same time, enhances the horizontal rigidity of the entire building and reduces the interlayer deformation angle. It aims at providing the reinforcement structure of the upper part of the opening part between wall panels which can implement | achieve the above steel house structure.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first invention of the present invention is to provide two thin lightweight steels (2) on the opening side of the boundary beam (1) arranged at the upper part of the opening between the thin lightweight steel wall panels. Are arranged facing each other, and the compression reinforcing material (3) formed of a thin lightweight plate is arranged in the two thin thin lightweight sections (2) constituting the boundary beam (1) in the longitudinal direction. Then, it is fixed to the wall panel (4) formed of the upper and lower thin plate-shaped lightweight steel with hole-down hardware and anchor bolts (5), and the reinforced boundary beam (7) made of the thin plate-shaped lightweight steel is further connected to the boundary beam (1). ), The bending rigidity of the boundary beam is increased, and the axial force applied to the wall panel leg when a horizontal force such as an earthquake is applied is reduced.
[0007]
According to the second aspect of the present invention, in the lightweight structure steel wall panel upper reinforcing structure according to the first aspect of the invention, the reinforcing boundary beam (7) is formed by combining two thin light weight shaped steels in a box shape, and the boundary It is fixed to the beam (1) by a tapping screw (8).
Further, the present invention of the third aspect is the light weight steel wall panel upper reinforcing structure of the first or second invention, wherein both ends of the boundary beam (1) are connected via a shear plate (11). It is characterized by being.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows a conventional steel house wall panel superstructure, in which a boundary beam 1 formed by one thin lightweight section 2 disposed at the upper part between wall panels formed by a thin lightweight section steel. A wall panel formed of a thin plate lightweight section steel, in which a compression reinforcing material 3 in which two thin plate lightweight section flanges are in contact with each other is arranged in the thin plate lightweight section steel 2 constituting the boundary beam 1 in the vertical direction. 4 is fixed with a hole-down hardware (not shown) and an anchor bolt 5. In the prior art, since the boundary beam 1 is formed of a single thin lightweight steel 2, a part of the end of the compression reinforcing material 3 is partially fixed to the wall panel 4 via the compression reinforcing material 3. In order to prevent direct contact and intrusion into the face material of the floor panel, a strip 6 formed of a thin plate is arranged on the top and bottom.
[0009]
FIG. 1 is a perspective view showing an embodiment of an opening upper reinforcing structure between wall panels of a steel house according to the present invention. In this embodiment, the boundary beam 1 arranged at the upper part between the wall panels 4 formed of the thin plate lightweight section steel, the bending stiffness of the boundary beam 1 with the two thin plate lightweight section steels 2 facing the opening side. , With increased proof stress. Boundary beam 1 is a wall formed of upper and lower thin lightweight sections, with compression reinforcing members 3 formed of thin lightweight sections shaped in the vertical direction inside the two thin lightweight sections 2 of the boundary beams 1. The panel 4 is fixed to the panel 4 with hole-down hardware and anchor bolts 5. Since the compression reinforcing material 3 is disposed inside the two thin lightweight steel shapes 2 constituting the boundary beam 1, the end portions of the compression reinforcing material 3 are not in direct contact with each other. The arrangement of the band plate 6 for preventing stagnation required in the technology can be omitted.
[0010]
FIG. 2 is a cross-sectional view showing another embodiment of the opening upper reinforcing structure between the wall panels 4 of the steel house of the present invention. In this embodiment, the boundary beam 1 arranged at the upper part between the wall panels 4 formed of thin lightweight steel is configured with two thin lightweight steels 2 with their opening sides facing each other. A reinforced boundary beam 7 formed by combining two thin and light steel sections extending in parallel with the boundary beam 1 in a box shape is fixed to the boundary beam 1 with a tapping screw 8 to further increase the bending rigidity and proof strength of the boundary beam 1. Is.
The boundary beam 1 has a compression reinforcing member 3 formed of a thin lightweight steel and placed inside the two thin lightweight steels 2 of the boundary beam 1, and the wall panel 4 formed of the upper and lower thin lightweight steel is holed down. Fix with hardware and anchor bolts 5. An end portion of the flooring 9 is disposed between the upper wall panel 4 and the boundary beam 1 and is fixed by a hole-down hardware and an anchor bolt 5.
[0011]
In FIG. 4A, since both ends of the boundary beam 1 are conventionally connected by simple screw joints, when a horizontal force such as an earthquake acts, a shear shift occurs between both ends of the boundary beam 1, and the boundary beam 1 rotates. The problem was that the corners would become large.
In FIG. 4B, both ends of the boundary beam 1 are connected via a shear plate 11 capable of transmitting a shearing force, thereby preventing a shear shift when a horizontal force such as an earthquake acts, and the boundary beam 1 rotating. The corner is made smaller.
[0012]
5A and 5B are a schematic diagram showing a state in which a horizontal force is applied to the upper portion of the wall panel of the conventional steel house shown in FIG. 3, and a moment generated in the opening when the horizontal force is applied. It is a figure which shows distribution.
The leg portions of the wall panel 4 are fixed to the foundation 12 via hole-down hardware and anchor bolts 5, and the boundary beam 1 is disposed on the upper portion of the opening 13 between the wall panels 4. When the boundary beam 1 has low bending rigidity, the boundary beam 1 is weakly joined at both ends, and the upper part of the wall panel 4 and the boundary beam 1 are merely joined by screws. Since the beam 1 does not bear bending stress, a large axial force is generated at the leg portion of the wall panel 4.
[0013]
6 (a) and 6 (b) are a schematic view showing a state in which a horizontal force is applied to the upper part of the wall panel 4 of the steel house according to the embodiment of the present invention shown in FIGS. 1, 2, and 4 (b). It is a figure which shows the moment distribution which generate | occur | produces in the wall panel 4 when force acts.
The bending rigidity of the boundary beam 1 is improved, and both ends of the boundary beam 1 are joined via the shear plate 11, so that when the horizontal force acts on the wall panel 4, the shaft generated in the leg portion of the wall panel 4 The force can be reduced to 60-80% compared to the conventional one.
[0014]
【The invention's effect】
By arranging the boundary beam having high bending rigidity at the upper part of the opening between the wall panels of the present invention, the axial force applied to the wall panel leg when a horizontal force such as an earthquake acts is reduced, and the wall panel leg It is not necessary to increase anchor bolts or the like that connect between the foundation and the foundation, and the horizontal rigidity of the entire building is increased, and the interlayer deformation angle can be reduced.
The structure of the basic principle of a steel house is formed of thin lightweight steel by connecting the reinforcing boundary beam made of thin lightweight steel to the boundary beam of the present invention in parallel and integrally connecting them to increase the bending rigidity of the boundary beam. Since the boundary beam can be reinforced while adhering to this, it can be fixed with a tapping screw, and the workability is good.
By connecting both ends of the boundary beam of the present invention via a shear plate, the rotation of the upper part of the opening is constrained, and when a horizontal force such as an earthquake acts, the rotation of the boundary beam is constrained and the wall panel legs The axial force applied to can be reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention.
FIG. 2 is a diagram showing an embodiment of the present invention.
FIG. 3 is a diagram showing a conventional technique.
FIGS. 4A and 4B are diagrams showing a conventional technique and an embodiment of the present invention.
5 (a) and 5 (b) are diagrams showing a conventional technique.
6A and 6B are diagrams showing an embodiment of the present invention.
[Explanation of symbols]
1: Boundary beam 2: Thin plate lightweight section 3: Compression reinforcement 4: Wall panel 5: Anchor bolt 6: Band plate 7: Reinforcement boundary beam 8: Tapping screw 9: Floor material 11: Shear plate 12: Foundation 13: Opening Part

Claims

Boundary beams (1) arranged at the upper part of the opening between the thin and light steel wall panels are arranged with two thin and lightweight shapes (2) facing the opening side, and the boundary beam (1) A wall panel formed of upper and lower thin plate-shaped lightweight steels in which the compression reinforcing material (3) formed of the thin plate-shaped lightweight shape steel is arranged in the vertical direction in the two thin, lightweight, shaped steels (2) to be configured. Bending the boundary beam by fixing it to (4) with a hole-down hardware and an anchor bolt (5), and further connecting a reinforced boundary beam (7) made of thin lightweight steel in parallel to the boundary beam (1). A thin, lightweight steel wall panel upper reinforcement structure characterized by increasing rigidity and reducing the axial force applied to the wall panel legs when horizontal forces such as earthquakes are applied.

The reinforcing boundary beam (7) is formed by combining two thin lightweight steel shapes in a box shape and is fixed to the boundary beam (1) by a tapping screw (8).
The thin-walled lightweight steel wall panel upper part reinforcement structure of Claim 1 characterized by these.

Both ends of the boundary beam (1) are shear plates ( 11 ) Are connected via
The thin-walled lightweight steel wall panel upper reinforcing structure according to claim 1 or 2.