Buckling-resistant steel structure primary and secondary beam connecting joint

Abstract

The invention discloses a buckling-resistant steel structure primary and secondary beam connecting joint. The buckling-resistant steel structure primary and secondary beam connecting joint comprises a primary beam and a secondary beam, wherein the primary beam and the secondary beam are connected through a pair of opposite fish webs, the fish webs comprise vertical wings, first flat wings, arc-shaped wings and second flat wings which are connected in sequence, the vertical wings are connected with the primary beam, and the second flat wings are connected with the secondary beam. According to the buckling-resistant steel structure primary and secondary beam connecting joint, the secondary beam is connected in a non-notch mode, and the primary beam and the secondary beam are connected through the buckling-resistant fish webs, so that material loss caused by secondary beam notches in traditional design and secondary beam web buckling damage caused by secondary beam section weakening can be avoided. The configuration sections of the two fish webs are symmetrical, eccentric torsion is not easy to occur, and the shearing force of the secondary beam can be effectively transmitted to the primary beam. Experimental results show that the interiors of the fish webs are hollow, but the fish webs have strong elasticity and plastic deformation capacity in a plane and are not easy to embrittle under the action of dynamic load. The buckling-resistant steel structure primary and secondary beam connecting joint has strong buckling resistance and shear bearing capacity and sufficient shear rigidity and impact resistance.

Description

technical field [0001] The invention relates to the technical field of steel structures in civil engineering, in particular to a buckling-resistant primary and secondary beam connection node of a steel structure. Background technique [0002] At present, the joints of the main beam and the secondary beam of the I-shaped section of the steel structure are generally hinged at the vertical connection, and its characteristic is that it needs to bear a large shear force and basically does not bear the bending moment. In order to ensure the effective transmission of shear force, the usual method is to cut off part of the flange plate and web at the end of the secondary beam, so that the end of the secondary beam forms a protruding shape, so that the web at the end of the secondary beam can be extended to the main connection at the web of the beam. Another purpose of cutting off the end of the secondary beam is to meet the requirements of use and ensure that the upper flange plate...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defect that the strength and stability of the joint cannot meet higher design requirements in the existing joint design scheme mentioned in the above background technology, the technical solution adopted in the present invention is to provide a buckling-resistant steel structure primary and secondary beam connection The node includes a main beam and a secondary beam, and the main beam and the secondary beam are connected by a pair of oppositely arranged fish webs, and the fish webs include successively connected vertical wings, first flat wings, arc wings, The second flat wing, the vertical wing is connected to the main beam, and the second flat wing is connected to the secondary beam

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