JPH108550A - Few-stories earthquake-resistant steel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel structure that is free from differential settlement and excellent in resistivity agaist vibration. SOLUTION: A few-stories earthquake-resistant steel structure is constructed by combining a large number of small steels for columns, beams and, etc. In such structure, a plurality of columns 1 are erected on a horizontal ground sill 3 made of shape steel. The column 1 has opposite two faces running in parallel with each other, and a pair of horizontal beams 2 and 2 are arranged at both sides of the column 1 with each face thereof fitted to each of the two faces of the column 1 and loosely joined to the column with cotter pins T each made of a bolt in an approximately L-shape inserted from the outside of the beams 2 and 2 toward the inside of the column 1 into bolt holes provided correspondingly at both of the column and the beams.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a wooden building,
The present invention relates to a high-strength, low-rise, anti-vibration steel frame constructed by skillfully combining small and numerous steel frames, such as columns and beams. Specifically, the use of shaped steel for the foundation supporting the columns
As the concrete foundation becomes smaller, the building increases its tenacity even if the upper part has a flexible structure. More preferably, a plug is used at the joint between members such as columns and beams, so that the entire building can be used. The present invention relates to a low-rise vibration-resistant steel frame building having a flexible structure and improved vibration resistance.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a low-rise steel building of the second floor or lower is constructed by combining small and many steel frames such as columns 10 and beams 20 and the like. Among them, the steel column 10 is erected on an inverted T-shaped concrete foundation 50 cast on a split stone 40 laid on the bottom of a shallowly excavated groove, and the lower end thereof is formed of a foundation 50. Is fixed to a foundation bolt AB buried in the base. In addition, a concrete space 60 is cast in the building. In addition, joints between members such as columns and beams are bolted (not shown) to secure the strength of the building.
As a result, the entire building is integrally (rigidly) fixed.

[0003]

However, according to the above-mentioned conventional low-rise steel building, the load of the building is distributed to each column 10, but the load applied to the column 10 is not enough for the entire foundation 50. Instead, in order to concentrate locally on the contact surface between the lower end of the pillar 10 and the foundation 50, it was necessary to increase the height of the foundation 50 (700 mm) and increase the width of the lower part (1,000 mm). Therefore, there is a drawback that uneven settlement is likely to occur and the construction cost increases. Also, to ensure the strength of the building,
The joints between the members such as the pillars 10 and the beams 20 are connected by bolts, but the whole building is integrally (rigidly) fixed by the bolts. There is also a disadvantage that it is weak.

The present invention has been made in order to eliminate the above-mentioned disadvantages of the prior art, and it is an object of the present invention to provide a low-layer vibration-resistant structure which does not cause uneven settlement and has excellent vibration resistance. It is to provide a sex steel building.

[0005]

In order to achieve the above-mentioned object, a low-rise vibration-resistant steel frame building according to the present invention, which is constructed by combining small and numerous steel frames such as columns and beams, comprises a plurality of columns (1).
Is erected on the upper surface of a horizontal base (3) made of a mold steel material (Claim 1).

Further, the pillar (1) according to the first aspect has two mutually parallel surfaces facing each other, and the pillar (1) and the pillar (1) have two faces.
A pair of horizontal beams (2, 2) sandwiching the column (1) from both sides by contacting the surface with the surface is inserted into a plug (T) made of a substantially U-shaped or substantially L-shaped bolt. It is preferable that the beam (2, 2) is loosely connected to the inside of the pillar (1) by inserting the bolt into the corresponding bolt hole (H) drilled from the outer surface toward the inside of the pillar (1) (claim 2).

The symbols in parentheses described in the means for solving the above-mentioned problems correspond to the symbols described in the drawings and the embodiments of the invention described later.

According to the first aspect of the present invention, since the plurality of columns are supported by the horizontal base made of the shaped steel material, the load of the building is distributed over the entire length of the base. Therefore, uneven settlement is unlikely to occur. In addition, since the foundation for supporting the building can be reduced, the construction cost is reduced. Further, even if the upper part of the building has a flexible structure, since it is supported by one common base, the tenacity of the upper part of the building is increased and the vibration resistance is excellent.

According to the second aspect of the present invention, by adopting a structure in which the pillar and the beam are loosely connected by the plug, the strength required for the building can be ensured.
The whole building has a flexible structure, and its vibration resistance is improved.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a low-rise vibration-resistant steel frame building according to an embodiment of the present invention, and FIG.
3 is a perspective view showing a main part of FIG. 1, and FIG. 3 is a side view showing a main part of FIG. FIG. 4 is a cross-sectional view showing an example of a joint of a low-rise vibration-resistant steel building.

The basic configuration of an embodiment of a low-rise vibration-resistant steel frame building according to the present invention is as follows. That is, small and many steel frames such as columns and beams are combined, and steel columns 1
(The square steel pipe in the figure) is erected on the upper surface of a horizontal base 3 made of a shape steel material (H-shaped steel in the figure).

Further, each column 1 is formed in a rectangular shape (square steel pipe) so that the cross section has two sides facing each other.
It may be formed in a U-shape (channel steel) or an E-shape (H-shaped steel). Each of the beams 2 is formed in a U-shaped cross section (a channel steel), and a pair of horizontal beams 2, 2 correspond to the two mutually parallel surfaces of the column 1 corresponding to the beams 2, 2, respectively. The column 1 is configured to be sandwiched from both sides in a state where the surfaces are in contact with each other. Further, in this state, the stopper T made of a substantially L-shaped bolt as shown in FIG. 4 is inserted from the outer surface of each beam 2 toward the inside of the column 1 into the corresponding bolt hole H drilled in both. The columns 1 and the beams 2 are loosely connected to each other. It should be noted that instead of the plug T shown in FIG. 4, a plug T made of a substantially V-shaped bolt as shown in FIG. 5 or a plug T made of a substantially L-shaped bolt as shown in FIG. May be used.

More specifically, a flange 3a is provided on the upper surface of the base 3 so as to be in contact with the outer surface of each column 1 or to have the column 1 fitted from above. The lower part is connected and fixed to the flange 3a by bolts B.
In a state where the bottom surfaces of the pair of beams 2 and 2 are abutted perpendicularly to both sides of the column 1 facing each other, the stopper T is inserted into the bolt hole H in the two vertical steps, 1 and beam 2,
2 is loosely bound. Further, the beams 2 are connected to each other by a connecting piece 2a which is laid horizontally at an appropriate location on the upper surface. The lateral beams 2 and 2 and the vertical beams 2 and 2 are attached to the pillar 1 disposed at the end of the building so as to vertically intersect.

In addition, as shown in FIG. 3, in order to support the base 3, the lower part is excavated in advance, a split stone 4 is laid, and a small concrete foundation 5 (height 180 mm, lower width 3
00 mm) and concrete slabs 6 are cast in the building. In addition, it is preferable that the bracing is provided in the wall portion for further improving the strength.

According to the above configuration, since the steel column 1 is supported on the horizontal base 3 made of a die steel material, the load of the building is dispersed over the entire length of the base 3 and unequal settlement is unlikely to occur. . In addition, since the foundation 5 for supporting the building becomes smaller, the construction cost is reduced. Even if the upper part of the building has a flexible structure, it is supported by one common base 3, so that the tenacity of the upper part of the building increases.

Moreover, since one common base 3 and at least one pair of beams 2 and 2 are laid across the column 1, stress can be transmitted quickly, and this structure is adopted in most of the building, so that the column can be used.・ Even if the members such as beams are small, the strength of the building increases. Further, by adopting a structure in which the column 1 and the beam 2 are loosely coupled by the bayonet T, necessary strength is secured, and the whole building is made flexible, and the vibration resistance is improved.

[0017]

As described above, according to the first aspect of the present invention, since the load of the building is distributed over the entire length of the base, uneven settlement is unlikely to occur as compared with the conventional example. In addition, since the foundation for supporting the building can be reduced, the construction cost is reduced. Further, even if the upper part of the building has a flexible structure, since it is supported by one common base, the tenacity of the upper part of the building is increased and the vibration resistance is excellent.

According to the second aspect of the invention, in addition to the operation and effect of the first aspect of the invention, a structure in which the column and the beam are loosely coupled by the bayonet is adopted. In addition, the strength required for the building is ensured, and the entire building is made flexible, so that its vibration resistance is improved.

Thus, a low-rise vibration-resistant steel frame building resistant to earthquakes is provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire low-rise vibration-resistant steel building according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a sectional view showing a first main part.

FIG. 4 is a cross-sectional view showing an example of a joint of a low-rise vibration-resistant steel building.

FIG. 5 is a cross-sectional view showing another example of a joint portion of a low-rise vibration-resistant steel building.

FIG. 6 is a cross-sectional view showing another example of a joint of a low-rise vibration-resistant steel building.

FIG. 7 is a sectional view showing a main part of a conventional example of a low-rise vibration-resistant steel frame building.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 2 Beam 2a Connection piece 3 Base 3a Flange 4 Split stone 5 Foundation 6 Soil 10 Column 20 Beam 40 Split stone 50 Foundation 60 Soil AB Foundation bolt B Bolt H Bolt hole T Plug

Claims (2)

[Claims] 1. A low-rise vibration-resistant steel frame constructed by combining small and numerous steel frames such as columns and beams, wherein a plurality of columns are erected on the upper surface of a horizontal base made of a shape steel material. A low-rise, vibration-resistant steel frame building. 2. The column has two opposing parallel surfaces, and the column and a pair of horizontal beams sandwiching the column from both sides by contacting the surfaces with the two surfaces of the column. It is characterized in that a bayonet or a substantially L-shaped bolt is inserted loosely from the outer surface of each beam to the inside of the column by inserting it into the corresponding bolt hole drilled in both. The low-rise vibration-resistant steel frame building according to claim 1.