JP2001193151A - Low-storied steel construction building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-storied steel construction building which costs low in manufacture and erection, enables quick execution of building work, and not requires much skill in erection work. SOLUTION: This construction building is provided with a unit forming a unit of a structural member in transporting from a steel factory to a building job site, and the unit has one or plural posts and one or plural beams joined to the post by welding in a factory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to low-rise steel structures. More specifically, the present invention relates to a low-rise steel building capable of inexpensive and quick construction work. In addition, in this specification, "low layer" means 1 layer-4 layers.

[0002]

2. Description of the Related Art A low-rise steel structure is basically constructed as shown in FIG.
As shown in (a), it is formed by combining structural members such as columns C and beams G to form a skeleton. Conventionally, a structural member is formed into a unit as shown in FIG. 6B in a factory in consideration of transportability from a steel frame factory to a building site, and after being transported to the building site, the joint is subjected to high strength. It was assembled by connecting with bolts.

[0003] The unit shown in Fig. 6 (b) will be described in more detail. Brackets GB1 and GB2 are attached to the column C1 where the beams G1 and G2 are connected by factory welding. Holes for passing high-strength bolts are formed at the tips (flanges and webs) of GB1 and GB2. On the other hand, holes corresponding to the high-strength bolts are formed also at the corresponding ends (flanges and webs) of the beams G1 and G2. Then, at the construction site, as shown in FIG.
Splice plates (joint plates) P1, P2,
A frame is formed by applying P3, P4, and P5, passing a high-strength bolt through the hole, and tightening with a required torque.

[0004]

However, when the above-described method is adopted, a large number of joints are required (in a two-layer, two-span rigid frame structure as shown in FIG. (8 places), and a required number of high-strength bolts and drilling work are required for each joint. Therefore, the material cost of the high-strength bolt and the drilling work increase the cost in the steel factory. In addition, even at a construction site, bolting work must be performed for each joint, which results in an increase in the construction period and an increase in operating costs associated with the bolting work. Further, in the method described above,
When the steel frame is to be built, it is not easy to adjust the position of each unit, so that there is also a disadvantage that the building method requires skill.

Accordingly, an object of the present invention is to provide a low-rise steel building which is low in manufacturing and construction cost, can perform construction work quickly, and does not require much skill in construction work. To provide.

[0006]

The low-rise steel building according to claim 1 of the present application includes a unit that is a unit of a structural member when transported from a steel factory to a building site, and the unit includes one unit.
Alternatively, it has a plurality of columns and one or more beams joined to the columns by factory welding.

[0007] The low-rise steel structure according to the second aspect of the present invention comprises:
2. The low-rise steel building according to claim 1, wherein a beam forming one unit is formed of one steel material, and the beam is factory-welded to an upper end of a column forming the unit. It is assumed that.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of a unit of a low-rise steel building according to a preferred embodiment of the present invention. Here, the “unit” means a unit of a structural member when transported from a steel factory to a building site.

A unit indicated by reference numeral 10 as a whole in FIG. 1 shows the first floor portion of a frame indicated by X1 in FIG. 6A, and a unit indicated by a reference numeral 20 as a whole in FIG. 6A shows the second floor portion of the frame indicated by X1.

The unit 10 includes columns 11, 12, and 13,
Each of the pillars 11, 1
The beams 2 and 13 and the beams 14 and 15 are joined by welding at a factory. The beams 14, 15 are preferably made of one piece of steel, as shown in FIG.
The unit 10 is formed by welding beams 14 and 15 to the upper ends of 2 and 13.

FIG. 3 is an enlarged view showing a portion 3 of FIG. A beam 14 is welded to the upper end of the column 11. That is, scallops 11a are provided on the columns 11, the flanges 11b of the columns 11 are butt-welded to the lower flanges 14a of the beams 14, and the webs 11c of the columns 11 are fillet welded to the lower flanges 14a of the beams 14.

On the other hand, the unit 20 includes columns 21, 22, 2
3 and beams 24 and 25, each column 2
1, 22, 23 and each beam 24, 25 are joined by welding at a factory. The beams 24 and 25 are also preferably made of an integral steel material as shown in FIG.
The unit 20 is formed by welding beams 24 and 25 to the upper ends of 1, 22, and 23, respectively.

FIG. 4 is an enlarged view showing the portion 4 of FIG. A base plate 22a is attached to a lower end of the column 22, and a hole 22b through which a high-strength bolt passes is provided in the base plate 22a. On the other hand, holes 14 for passing high bolts are also provided at corresponding positions on the upper flanges of beams 14 and 15.
a and 15a are provided. Similarly, a base plate is also attached to the lower ends of the columns 21 and 22, and the beams 1
Holes (not shown) for passing high bolts are provided at corresponding locations of the upper flanges 4 and 15.

FIG. 5 is a view showing a state where the unit 10 and the unit 20 are joined.

The unit indicated generally by reference numeral 30 in FIG. 2 represents the first floor portion of the frame indicated by Y1 in FIG. 6A, and the unit indicated generally by reference numeral 40 in FIG. 6 (a) shows the second floor portion of the frame indicated by Y1.

The unit 30 comprises a column 31 and beams 32 and 33.
And the pillar 31 and the beams 32 and 33 are
Welded at the factory. The beams 32, 33 are preferably made of an integral steel material, as shown in FIG. 2, and the unit 30 is formed by welding the beams 32, 33 to the upper end of the column 31. On the other hand, the unit 40 includes a column 41 and beams 42 and 43, and the column 41 and the beams 42 and 43 are joined by welding at a factory. The beams 42 and 43 are also preferably made of an integral steel material as shown in FIG. 2, and the unit 40 is formed on the upper end of the column 41 by welding the beams 42 and 43. The unit 30 and the unit 40 are joined by a high-strength bolt via a base plate 41a attached to the lower end of the column 41, similarly to the unit 10 and the unit 20.

The connection between the unit 10 and the unit 30 and the connection between the unit 20 and the unit 40 (ie, the connection between the X-direction unit and the Y-direction unit) can be achieved by adopting the bracket system as described in the section of the prior art. Alternatively, an on-site welding method may be employed. Alternatively, only the connection of the flange portion of the beam may be performed by field welding, and the connection of the web portion of the beam may be a method of joining with a high bolt using a gusset plate previously attached to the column.

The above description has been made in connection with X1 ways, Y1 ways, but the same applies to X2 ways, X3 ways, Y2 ways, and Y3 ways.

Next, a method of constructing a low-rise steel structure constructed as described above will be described. The unit 10 and the like transported to the building site are built on the foundation of the place where the building is to be installed. At this time, the units 20, 40, etc., corresponding to the second floor portion, are previously replaced with the units 1, 40 corresponding to the first floor portion.
It is good to connect to 0 and 30. Then, X units and Y units are temporarily fixed with bolts. And after centering and adjusting the position, tighten the bolt,
The frame of the steel structure is completed.

The present invention is not limited to the above embodiments of the invention, and various modifications can be made within the scope of the invention described in the claims. It goes without saying that it is included in.

For example, in the above-described embodiment, the connection between the unit on the first floor and the unit on the second floor is performed via the base plate attached to the lower end of the column of the unit on the first floor. It may be configured to be cut in the middle and connect the upper and lower columns with a splice plate and high-strength bolts.

[0022]

According to the present invention, the number of joints of a steel frame can be extremely reduced, so that the cost of manufacturing at a factory and the cost of building on site can be reduced. The inventor of the present invention has proposed an H of 3 spans in the X direction and
A cost comparison was made between the conventional method and the method of the present invention for a two-story steel frame structure made of a shaped steel. As a result, when this method is adopted, compared with the conventional method, the hole drilling work at the joint is about 1/15, the number of splice plates is about 1/11, and the required number of high-strength bolts is about 1/15. 9 was found to be reduced. In particular, since the high-strength bolt has a high unit price per weight, it is expected that considerable cost reduction can be expected as a whole. In addition, since the number of joints is small, the time required for assembling can be shortened, and cost reduction can be expected. In addition, since the unit is formed in the factory, it is no longer necessary to revitalize the plant by the conventional method.
It also has the effect that less skill is required for the construction work. Further, by welding an integral beam to the upper end of each column, the number of members can be reduced and welding distortion can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a unit in an X direction of a low-rise steel building according to a preferred embodiment of the present invention.

FIG. 2 is a diagram showing an example of a unit in a Y direction of a low-rise steel building according to a preferred embodiment of the present invention.

FIG. 3 is an enlarged view showing a part 3 of FIG. 1;

FIG. 4 is an enlarged view showing a part 4 of FIG. 1;

FIG. 5 is a diagram showing a state where the two units shown in FIG. 1 are joined.

6A and 6B are diagrams showing an example of a conventional low-rise steel structure, wherein FIG. 6A is a perspective view showing a frame of a two-story, two-span steel structure, and FIG. 6B is a view of FIG. The figure which showed the conventional processing example in the steel-frame factory of X1 types of frame, (c) is (b)
3 is an enlarged view showing a portion c of FIG.

[Explanation of symbols]

 10 units 11, 12, 13 columns 14, 15 beams 20 units 21, 22, 23 columns 24, 25 beams 30 units 31 columns 32, 33 beams 40 units 41 columns 42, 43 beams

Continued on the front page F-term (reference) 2E125 AA03 AA13 AB01 AC15 AG03 AG04 AG12 AG32 AG43 AG57 BB02 BB22 BB35 BB37 BD01 BE02 BE08 BF04 CA05 CA06 CA13 CA14 CA90 EA33

Claims (2)

[Claims] 1. A unit as a unit of a structural member when transported from a steel frame factory to a building site, wherein the unit includes one or more columns and one or more beams joined to the columns by factory welding. A low-rise steel structure characterized by having. 2. The beam according to claim 1, wherein the beam forming one unit is made of one steel material, and the beam is factory-welded to an upper end of a column forming the unit. A low-rise steel structure as described.