JPH02204545A - Structure of junction portion of steel column and beam - Google Patents

Abstract

PURPOSE:To prevent the corner angle portion of a column from being deformed by providing and adding adjacent junction plates to the inner side face of the column, the plates being in contact with each other at their ends, and fixing the plate to the end portion of a beam and joining the column and both plates by a bolt and nut. CONSTITUTION:A steel skeleton column 1 is formed of a square steel pipe having an R portion 2 on its inner and outer face at a corner angle, and also adjacent junction plates 6 are brought in contact with each other at their ends so that the plates 6 are provided on the inner side face of the column 1. A T-shaped metal fitting 4 is affixed to the junction end portion of a skeleton beam 3. While a junction plate 5 ie. the vertical flange of the metal fitting 4 is placed along the outside of the column 1, the column 1 and the beam are joined together by a bolt 7 and nut 8 passing through both of the plates 5, 6 and the column 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to the structure of a joint between a steel column made of square steel pipes and a steel beam.

[Prior Art and Problems to be Solved by the Invention] The applicant previously disclosed a structure in which a steel column made of square steel pipes and a steel beam are joined using bolts in Japanese Patent Publication No. 57-7258 and Japanese Patent Application Laid-Open No. 1983-1989. -16713 publication.

JP-A-59-165744, JP-A-60-235
Various developments and proposals have been made regarding joint structures such as those shown in Japanese Patent Application Laid-Open No. 38-38, Japanese Patent Application Laid-open No. 62-329188, and Japanese Patent Application Laid-Open No. 61-28252. This invention was developed specifically for the purpose of providing a structure that improves the joint plate attached to the inner surface of a column and smoothes stress transmission from the beam to the column and beam. In other words, the square steel pipe columns commonly used today have rounded corners at the corners, and the conventional joint structure creates a large eccentric bending moment at the corners, which may cause deformation at the corners. .

Therefore, the previous proposal is a plan to deal with these problems, but the present invention aims to solve the above problems by butting adjacent joint plates attached to the inner surface of the column.

[Means to solve the problem]

This invention relates to a joint plate in which a square steel pipe column having rounded portions on the inner and outer surfaces of the corner and a steel beam are attached to the outside surface of the beam end, a joint plate attached to the inner surface of the column, and each of the above-mentioned joint plates and the column. When joining with a penetrating bolt, the ends of adjacent joint plates are directly abutted on the inner surface of the rounded portion or abutted with a reinforcing steel material interposed therebetween.

That is, this invention is intended to transmit stress from the joint plate to the column side wall by abutting the adjacent ends of the joint plate attached to the inner surface of the column.

The details will be explained below with reference to illustrated embodiments.

〔Example〕

The steel column 1 is made of a square steel pipe having rounded portions 2 on the inner and outer surfaces of the corners. A T-carved piece 4 is fixed to the joint end of the steel beam 3 with high-strength bolts, etc., and a joint plate 5, which is a vertical flange of the T-carved piece 4, is butted against the external side surface, and is attached to the inner side surface of the column. A joining plate 6 is attached to the joint plate 6. and bolts 7 passing through each joint plate 5.6 and the pillar 1.
and Naso l-8. Then, on the inner surface of the rounded portion, adjacent joining plates 6.
6 ends and weld if necessary.

Note that the joining plates 6.6 may be brought into close contact with each other by bringing their end faces into close contact as shown in FIG. 3, or by bringing together some of their end faces as shown in FIG.

Further, as shown in FIGS. 5 and 6, the joining plates 6.6 can be butted with reinforcing steel members 9 arranged at the corners interposed therebetween. Note that this reinforcing steel material 9 can be attached in advance to the inner surface of the steel column 1 or the end of the joint plate 6 by welding or the like.

〔Effect of the invention〕

This invention has the above-mentioned configuration, and when joining a steel beam to a square steel pipe column having a radiused portion on the inner and outer surfaces of a corner, a joining plate attached to the inner surface of the column is butted with adjacent ends at the inner surface of the radiused portion. Therefore, it is possible to reinforce the corners, prevent deformation of the corners, and ensure stress transmission from the beams to the columns and beams through the inner and outer joint plates.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views and elevation views of the column-beam joint, and Figures 3, 4, 5, and 6 are cross-sectional views of main parts showing different embodiments. It is. 1. Steel column, 2. Round section, 3. Steel beam, 4.
T engraving, 5.6...Joining plate, 7...Bolt, 8
...Natsuto, 9...Reinforcement steel material. Figure 5 Figure 6 Figure 6

Claims (2)

[Claims] (1) A joint plate of a square steel pipe column and a steel beam having rounded corners on the inner and outer surfaces of each corner attached to the outer surface of the column at the end of the beam, a joint plate attached to the inner surface of the column, and each of the above-mentioned joint plates and columns. A structure of a steel column/beam joint, characterized in that the ends of adjacent joining plates are butted together at the inner surface of the rounded part when joining with a bolt passing through the steel column/beam joint. (2) The structure of the steel column/beam connection bracket according to claim (1), wherein the ends of the connection plates are butted together with a reinforcing steel interposed therebetween.