JP3977225B2 - Structure of the outer wall of the steel structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outer wall base structure for constructing an outer wall of a steel structure.
[0002]
[Prior art]
Conventionally, the outer wall mounting structure for steel structures has been divided into a curtain wall type mainly for medium to high-rise buildings to skyscrapers, and a torso type mainly for low-rise houses, offices, factories and warehouses. Among them, for example, as shown in FIG. 7, a plurality of base columns 3 fixed between a roof beam member 2 and a floor beam member (not shown) joined to a column 1 are used. A base structure in which a plurality of body edges 4 are attached and a plurality of outer wall members 5 are fixed to the body edges 4 with tapping screws 6 is generally used. In the base structure of the trunk edge type, a lightweight section steel (lip groove section steel) is generally used as the base column 3 in many cases.
It is necessary to design the base column 3 so as to be able to support the axial force generated by the long-term wall weight, the short-term wind pressure, and the inertial force during an earthquake. Thus, for example, measures are taken such as connecting the base pillars 3 to each other in the direction of the wall, and attaching a deflection preventing member (lip groove steel ... not shown).
However, in the case of preventing the bending of the base columns 3, there is a problem that the details of the connection between the base column and the bending preventing member are complicated and the number of assembling (bonding) steps is increased. Further, the outer wall surfaces of the plurality of base pillars 3 are often uneven in a planar manner, and it is necessary to perform an operation of mounting the outer wall material that eliminates the inconvenience due to the unevenness, and there is a problem that this work man-hour increases.
[0003]
In order to meet the above requirements, a plurality of hollow metal quadrangular columns as base columns, a flexible member (grooved steel) penetrating and fixed to the metal quadrangular columns, and a vertical direction of a specific metal quadrangular column By constructing the intermediate part with an intermediate fixing bracket that fixes the intermediate part to a predetermined support (steel column), it is possible to prevent bending in the direction perpendicular to the in-wall direction. A base structure for an outer wall is disclosed in which a typical outer wall material mounting surface is obtained and an outer wall material mounting operation is facilitated (see Patent Document 1).
However, even in this case, there is a problem that it is necessary to attach a grooved steel or an intermediate fixing metal to prevent bending. The outer wall foundation structure has a structure that can support bending due to wall weight and wind pressure, axial force generated by inertial force during an earthquake, and a clear deformation tracking mechanism to avoid damage to the outer wall material during an earthquake. It is necessary to have. Furthermore, in order to obtain an outer wall base structure that has a simple structure, a small number of members, and is easy to assemble, it is desirable that members and metal fittings for preventing the base column from being bent become unnecessary.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-124981
[Problems to be solved by the invention]
In the conventional outer wall foundation structure, for example, in the case of a two-storied steel structure, it is common to construct with one foundation pillar from the foundation concrete rising part (floor beam) to the beam on the second floor roof. . For this reason, since the up-and-down support span of the base column becomes long, members and metal fittings for preventing bending have become indispensable. In addition, since there is no clear deformation following mechanism for the deformation of the support column, the base column and the outer wall material supported by the base column may be damaged during an earthquake.
The present invention is a steel structure outer wall foundation structure that can advantageously solve these conventional problems, more specifically, the structure is simple and easy to assemble, can reduce the cost burden and shorten the work period, and is supported during an earthquake. It is an object of the present invention to provide an outer wall foundation structure of a steel structure in which pillars and wall materials are not easily damaged.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention has the following (1) to (3).
(1) An outer wall base structure of a steel structure, in which base studs made of a plurality of thin lightweight steel plates are arranged in units of floors, and a lower portion of the base stud is pin-supported and fixed to a floor slab, and a steel beam Under the runner is fixed with a tapping screw, the top of the stud is inserted into the opening of the runner, the stud can freely slide in the longitudinal direction of the runner, and the outer wall material is directly attached to the base stud with the fastening material, or An outer wall base structure of a steel structure characterized by being fixed through a fixing bracket.
(2) In (1), the pin for fixing the base stud to the floor slab is a drive-in type anchor pin, and the runner for fixing under the steel beam is fixed by a fitting-type fixing bracket. The base structure of the outer wall of the steel structure.
(3) The outer wall foundation structure of a steel structure according to (1) or (2), wherein an attachment hole for wiring or piping is formed in a side portion of the foundation stud.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a base structure for an outer wall of a steel structure, and a plurality of base columns (hereinafter referred to as “base studs”) are formed of thin lightweight steel, and the lower portions of the base studs are pin-supported and fixed to a floor slab. In addition, the outer wall base structure is constructed by supporting and fixing the pin under the steel beam by a slide method in which the upper part is guided by a runner formed of lightweight channel steel, for example, and the outer wall is constructed by directly attaching the wall material to the base stud Can do.
The thin plate lightweight section forming the base stud in the present invention is necessary for safety related to the manufacturing method of the thin plate lightweight section steel building or the structural part of the building on November 15, 2001, Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1641 Thin steel lightweight section steel with a thickness of less than 2.3 mm (galvanized steel sheet formed into square, groove, Z-shape, etc.) that can be used as a structural material in accordance with matters such as establishing technical standards. is there.
In the present invention, a plurality of thin lightweight steel plates represented by squares are disposed as the base stud, and when the outer wall material is fixed to the base stud, the base stud is disposed so as to straddle the adjacent outer wall material. There are cases where it is arranged so that there is no straddle.
In addition, when fixing the inner wall material to the base stud, there are a case where the base stud is arranged so as to straddle the adjacent inner wall material and a case where the base stud is arranged so as not to straddle, and a plurality of base studs are arranged at an equal pitch. In some cases, a base column represented by a lip channel steel dedicated to the inner wall member is arranged instead of the base stud at the joint of the inner wall member alone (when there is no joint at the position of the opposite outer wall member). These arrangements can be appropriately selected according to, for example, the size of the inner and outer wall materials, the size of the base stud, and the like.
In addition, a fixed fitting of a fitting type that supports and fixes the pin to the floor slab is attached to the lower part of the base stud, and the pin is fixed and fixed to the floor slab via this fixed fitting. It is effective to give it effectively.
As this fixed metal fitting, in the case where the base stud is a rectangular thin lightweight steel, for example, a fixed metal piece disclosed in FIG. 1 of Japanese Patent Laid-Open No. 2000-17728 is highly suitable.
Basically, a plurality of base studs are arranged side by side. When a plurality of base studs are arranged side by side so that the upper end of the base stud can slide smoothly with respect to the runner, they are connected in the side by side arrangement. It is desirable. The runner for slidably guiding the upper end portion of the base stud may be arranged in units of base studs, or may be arranged in units of a plurality of base studs.
[0008]
In the present invention, the lower part of each base stud is pin-supported and fixed to the floor slab, and the upper part is slidably supported and fixed under the beam via a runner, and the wall material is directly attached to the base stud by a tapping screw. The stud is provided with a deformation follow-up function, and this base stud can support the axial force caused by the wall weight and wind pressure and the inertial force at the time of earthquake, and can follow the deformation due to the earthquake. Damage to the wall material attached to the base stud can be avoided.
In addition, the base stud is made to be the length of each floor unit and is arranged between the upper beam and the floor slab, thereby shortening the support span of the base stud and using materials and metal fittings to prevent the base stud from bending. A reinforcing structure is not required, the number of members is small, assembly is easy, cost reduction and construction time can be shortened.
When the support span of the base stud is shortened, even if the base stud is made of a thin lightweight steel with a plate thickness of less than 2.3 mm (often 1 mm or less), the wall weight and wind pressure It is easy to make a structure that can support the axial force generated by bending due to bending and inertial force at the time of earthquake, and because the base stud is thin, the wall material is a light fastening material typified by tapping screws and screws Can be directly fixed to the base stud. Alternatively, it can be engaged and fixed via a fixing bracket fixed to the base stud.
The fixing bracket basically has an engaging portion that bites into an end portion of the wall material when the wall material is arranged at a predetermined position, and the wall member is engaged by engaging the wall material with the engaging portion. It has a structure that can fix the material to the base stud. As this fixing bracket, for example, a fixing bracket as disclosed in FIG. 5 of JP-A-2002-61372 is suitable as a known bracket.
The outer wall foundation structure of the present invention can be a foundation structure that also serves as an inner / outer wall material, and construction costs can be significantly reduced. Moreover, since the wall material attachment surface with good flatness can be formed, the wall material can be easily attached.
[0009]
In this outer wall foundation structure, the lower part of the foundation stud is pin-supported and fixed to the floor slab. However, as this pin, an anchor pin that can be easily installed (here, a pin hole previously opened in the floor slab) is used. It is effective to use a driving type pin that is driven from the outside and deforms the tip portion within the pin hole to form and fix the anchor portion (hereinafter referred to as “anchor pin”). Further, for fixing the runner under the steel beam, it is effective to use a fitting-type fixture that is easier to construct than a fixing means such as welding and has good followability to deformation.
This eliminates the possibility of damaging the outer wall material during an earthquake, so that the outer wall material can be directly attached to the base stud, and the construction cost can be greatly reduced. In addition, since the base stud is not welded to the steel beam, the joint detail is not contaminated by field welding, etc., and the thin plate lightweight section steel, which is a pre-plated material, is used, eliminating the need for rust-proof coating on site. Therefore, it is possible to provide an outer wall base structure with excellent aesthetics without causing stain due to painting.
Furthermore, since the outer wall base structure generally requires various wirings and various pipes, an attachment hole for various wirings and various pipes is formed in the side portion of the base stud. It is effective. This attachment hole can be formed by, for example, forming a hole having a diameter of less than 50 mm so as not to significantly reduce the structural function as the base stud. This attachment hole is not indispensable and is selectively formed by a single or a plurality.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to FIGS. Although this embodiment is applied to the outer wall foundation structure of a two-story steel structure, here, the outer wall foundation structure in the second floor portion is shown.
1 and 2, reference numeral 2 denotes an upper H-shaped steel beam joined to a support (not shown), and a runner fixing tool 7 is fitted on the lower surface side of the lower flange 2 f of the H-shaped steel beam 2. Yes. As shown in FIG. 3, the runner fixture 7 includes a sheath portion 8 and hook portions 9 that are fitted into both end portions of the sheath portion.
The sheath portion 8 has a flange 8f that contacts the lower surface of the lower flange 2f of the H-shaped steel beam 2 and a runner mounting surface 8p, and has a fitting portion 8k with the hook portion 9, and the hook portion 9 is H-shaped. It has a contact plate 9p that contacts the upper surface of the lower flange 2f of the steel beam 2 and a fitting portion 9k that fits into the fitting portion 8k of the sheath portion 8.
At both end portions of the lower flange 2f of the H-shaped steel beam 2, the hook portion 9 is fitted to the sheath portion 8, and the lower surface of the contact plate 9p of the hook portion 9 is set to the upper surface of the lower flange 2f of the H-shaped steel beam 2. The hook portion 9 and the sheath portion 8 can be fixed to the lower flange 2 f of the H-shaped steel beam 2 by abutting and pushing.
[0011]
Reference numeral 11 denotes a runner made of channel steel, and the outer surface of the web 11u is brought into contact with the runner mounting surface 8p on the outer wall side of the sheath portion 8 and fixed with a tapping screw 12 that is a fastening material. Reference numeral 13 denotes a base stud. For example, as shown in FIG. 4 (a), each floor unit can be fixed between the upper H-shaped steel beam 2 and the floor slab 16, and the thickness formed into a square is 1 mm or less. The upper end side is fitted to the runner 11, guided to the inner surface side of the runner 11, and slidable in the length direction of the runner 11. Here, the runner 11 is arranged in units of a plurality of base studs 13. In this case, it is desirable to connect the plurality of base studs in the juxtaposed direction so that the upper end of the base stud can slide smoothly.
On the other hand, as shown in FIG. 4 (b), a fitting-type fixing metal 14 is fitted and attached to the lower end of each base stud 13, and the lower surfaces of the flanges 14a, 14b of the fixing metal 14 have pin holes. Abutting on the upper surface of the floor slab 16, the pin holes 14 p of the flanges 14 a, 14 b are aligned with the pin holes of the floor slab 16, and the flanges 14 a, 14 b are each fixed by one anchor pin 17. Here, the fixed hardware 14 used is a fixed hardware as disclosed in FIG. 1 of Japanese Patent Laid-Open No. 2000-17728.
[0012]
By supporting the base stud 13 to the floor slab 16 via the fixed hardware 14 by pin support and fixing, the support pressure is secured, and the base stud 13 is stably supported on the floor slab 16 to secure the support pressure. Reference numeral 20 denotes an outer wall material, and the upper side abuts on the outer surface side of the base stud 13 and is fixed by a tapping screw 12.
In the figure, reference numeral 21 denotes an outer wall receiving bracket attached to the flange 2f of the H-shaped steel beam 2 via the fixing bracket 7. Here, the lower side of the outer wall member 20 is brought into contact with and fixed with the tapping screw 12. Reference numeral 22 denotes an inner wall material (generally gypsum board is generally used), which is fixed to the flange portion of the base stud 13 with a tapping screw 12. In the figure, 25 is a sealing material.
In addition, about arrangement | positioning of the outer wall material 20 with respect to the foundation | substrate stud 13, as shown to Fig.5 (a), as shown in FIG.5 (b), when arrange | positioning so that the foundation | substrate stud 13 may straddle the adjacent outer wall material 20. It may be arranged so as not to straddle.
Moreover, about arrangement | positioning of the inner wall material 22 with respect to the base stud 13, as shown to Fig.6 (a), as shown in FIG.6 (b), as shown in the case where it arrange | positions so that the base stud 13 may straddle the adjacent inner wall material. There is a case where it is arranged so as not to straddle, and it is represented by a lip channel steel dedicated to mounting the inner wall material 22 instead of the base stud 13 at the joint of the inner wall material 22 alone (when there is no seam at the position of the opposite outer wall material) In some cases, the base pillars 23 are arranged.
About these arrangement | positioning, it selects suitably according to the size of an inner / outer wall material, the size of a base stud, arrangement | positioning, etc., for example.
In the outer wall material base structure of this embodiment, the lower end portion of each base stud 13 is supported and fixed to the floor slab 16 by the anchor pin 17 via the fixing bracket 14, and the upper part is runner 11 to the lower flange 2 f of the H-shaped steel beam 2. The base stud 13 has a structure in which the outer wall material 20 is attached to the base stud 13 with the tapping screw 12, and the base stud 13 is provided with a deformation follow-up function. Since it can support the axial force generated by the bending due to the inertia and the inertial force at the time of earthquake and can flexibly follow the deformation due to the earthquake, it is possible to avoid damage to the base stud 13 and the outer wall material 20 attached to the base stud 13 Can do.
[0013]
In addition, the base stud 13 is disposed between the H-shaped steel beam 2 and the floor slab 16 with the length of each floor unit, thereby shortening the support span of the base stud 13 and preventing the base stud 13 from bending. This eliminates the need for reinforcing structures such as members and metal fittings, reduces the number of members, facilitates assembly, and reduces cost and construction time.
In addition, this invention is not limited to the content of this Example. For example, plate thickness, shape and structure of base stud (including fixed structure), arrangement unit and fitting structure of runner and base stud, shape and structure of dedicated bracket for fitting method, bottom stud structure of base stud, base stud and The arrangement of the inner and outer wall materials, the presence / absence of the attachment holes, and the like are subject to change within a range that satisfies the scope of the claims of the present invention.
[0014]
【The invention's effect】
In the present invention, as the outer wall base structure, the base stud is formed short with a rectangular thin plate-shaped lightweight steel and is disposed, for example, in units of floors. The lower part of the base stud is pin-supported and the upper part is a runner. Because it has a structure that supports by the slide method that guides in, it supports the bending due to wall weight and wind pressure, axial force caused by the inertial force at the time of earthquake, and also for deformation of the base stud and outer wall material at the time of earthquake Accordingly, it is possible to prevent the base stud and the outer wall material from being damaged during an earthquake.
Further, since the outer wall base structure is simple and has a small number of members and is easy to assemble, and the support span of the base stud is short, members and metal fittings for preventing the base stud from bending can be omitted.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side sectional explanatory view showing an outer wall foundation structure in an embodiment of the present invention.
FIG. 2 is a horizontal cross-sectional explanatory view showing an outer wall base structure in an embodiment of the present invention.
3A is a partially sectional front explanatory view showing a fitting-type fixing bracket for fixing a runner to an H-shaped steel beam in an embodiment of the present invention, and FIG. 3B is a diagram of FIG. Side sectional explanatory drawing of a fitting-type fixing metal fitting.
4A is a three-dimensional explanatory view showing an example of the structure of the foundation stud in the embodiment of the present invention, and FIG. 4B is a three-dimensional explanatory view showing an example of the structure of the fixed hardware attached to the lower end portion of the foundation stud. .
5A is a partial cross-sectional plan view showing an arrangement example of a base stud and an outer wall material, and FIG. 5B is a partial cross-sectional plan view showing another arrangement example of the base stud and the outer wall material. Figure.
6A is a partial cross-sectional plan view showing an arrangement example of the base stud and the inner wall material, and FIG. 6B is a partial cross-sectional plan view showing another arrangement example of the base stud and the inner wall material. Figure.
FIG. 7 is a partially cutaway solid explanatory view showing an example of a conventional outer wall foundation structure.
[Explanation of symbols]
1 Prop 2 Beam (H-shaped steel beam)
2f Flange 3 Base pillar 4 Body edge 5 Outer wall material 6 Tapping screw 7 Fitting type fixing bracket 8 Sheath portion 8p Mounting surface 8k Fitting portion 9 Hook portion 9p Abutting plate 9k Fitting portion 10 Tapping screw 11 Runner 11u Web 12 Tapping Screw 13 Support stud 14 Fixed metal 14f Flange 14p Pin hole 16 Floor slab 17 Anchor pin 18 Attached hole 20 Outer wall material 21 Outer wall receiving bracket 22 Inner wall material 23 Base pillar 25 Sealing material

Claims (3)

An outer wall base structure of a steel structure, in which base studs made of a plurality of thin and light steel shapes are arranged in units of floors, and the lower part of the base stud is pin-supported and fixed to a floor slab, and a runner under the steel beam The upper part of the stud is inserted into the opening of the runner, and the stud can freely slide in the longitudinal direction of the runner. An outer wall base structure of a steel structure characterized by being fixed through a wall.   The steel frame according to claim 1, wherein the pin for fixing the base stud to the floor slab is a drive-in type anchor pin, and the runner for fixing the steel stud below the steel beam is fixed by a fitting-type fixing bracket. Structure of the outer wall of the structure.   The outer wall foundation structure for a steel structure according to claim 1 or 2, wherein an attachment hole for wiring or piping is formed in a side portion of the foundation stud.

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