Canine bone-honeycomb type combined flat beam connecting joint

Abstract

The invention discloses a canine bone-honeycomb type combined flat beam connecting joint, and relates to the technical field of building structures. The canine bone-honeycomb type combined flat beam connecting joint comprises a profile steel component and a profiled steel plate-concrete combined floor slab, wherein the profile steel component is an I-shaped steel column, and the left flange and the right flange of the I-shaped steel column are equal in width; the I-shaped steel column is perpendicular to an I-shaped steel beam, the middle of the right flange of the I-shaped steel column is fixed to the left end of the I-shaped steel beam, the lower flange of the I-shaped steel beam is wider than the upper flange, the upper flange and the lower flange are equal in thickness, and the lower flange and the right flange of the I-shaped steel column are equal in width; and the profiled steel plate-concrete combined floor slab comprises a profiled steel plate which is welded to the lower flange of the I-shaped steel beam in a lap joint mode, a concrete floor slab is arranged above the profiled steel plate, and a reinforcing mesh penetrates through the concrete floor slab. The canine bone-honeycomb type combined flat beam connecting joint has the advantages that the end flanges of the I-shaped steel beam are weakened in a canine bone mode, stress concentration of a honeycomb type combined flat beam joint welding seam area is relieved, the risk of brittle fracture of the joint area under the action of cyclic load is avoided, outward movement of a plastic hinge is realized, and the anti-seismic property is good.

Description

Technical field [0001] The invention relates to the technical field of building structures, in particular to a dog bone-honeycomb type combined flat beam connection node. Background technique [0002] The composite flat beam is a new type of composite component formed by embedding the I-shaped steel beam in the profiled steel plate-concrete composite floor. It has the advantages of light weight, good fire resistance, and reduced structural layer height. It is favored by engineering designers. Favor. In the frame structure, the composite flat beam node is the key force-bearing area, and its mechanical performance is very important to the seismic performance of the structure. In the existing composite flat beam joints, beams and columns are mostly welded rigidly connected. Affected by welding residual stress, the risk of brittle fracture in the joint weld area under cyclic loading is relatively high. In addition, due to the solid web section of the I-beam webs, it brings difficul...

AI Technical Summary

Problems solved by technology

In the existing composite flat beam joints, the beams and columns are mostly connected by welding rigidity. Due to the influence of welding residual stress, the risk of brittle fracture in the weld area of ​​the joint is high under the action of cyclic load.

In addition, since the I-shaped steel beam web adopts a solid web section, it brings difficulties to the laying of pipelines in the building, which limits the popularization and application of the composite flat beam structure in engineering

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