Steel-concrete combined connection structure in concrete tension state

Abstract

The invention discloses a steel-concrete combined connection structure in a concrete tension state, and provides a series of novel structure construction methods by utilizing stud shear resisting connectors with constraint structures and utilizing excellent and stable stress performance of the stud shear resisting connectors in an aspect of steel-concrete interface shear resisting rigidity. By adopting the novel structure construction method under a condition that an axis of the concrete is tensioned or bent, an adverse effect of concrete tension cracking in steel-concrete combined connectioncan be effectively reduced, and connection strength and connection rigidity of the combined connection under the condition that the axis is tensioned or bent can be simply and effectively reinforced or enhanced. For example, when the novel connecting construction method is applied to a combined beam hogging moment area, concrete in the combined beam hogging moment area can be effectively controlled and prevented from being pulled and cracked so that flexural rigidity of the composite beam hogging moment area can be reinforced or enhanced, and an engineering problem that a combined applicationdegree is low due to concrete cracking of steel-concrete combined connection in the hogging moment area is solved.

Description

technical field [0001] The invention relates to the technical field of stud shear connectors, in particular to a steel-concrete composite connection structure under concrete tension. Background technique [0002] Steel-concrete continuous composite beams will have unfavorable conditions in the negative bending moment area, such as concrete tension and steel beam compression, especially the cracking of concrete slabs, which will cause the reduction of the stiffness and durability of composite beams. Therefore, it has become a key issue in the design of continuous composite beams to adopt effective design, construction methods and treatment measures to effectively control and prevent concrete cracking in the negative moment zone. At present, the commonly used treatment methods are: preloading method, support pre-lifting method, prestressing method, reinforcement limit concrete crack width method, post-combined prestressed concrete bridge deck method, steel beam bottom plate po...

AI Technical Summary

Problems solved by technology

[0004] (1) The on-site construction is complicated, the workload is heavy, the construction period is long, and it is difficult to partially renovate the composite beam in the future;

[0005] (2) Some technologies will cause local stress concentration, and necessary structural measures need to be taken to improve the stress concentration problem, resulting in complex design;

[0006] (3) The cost is high and uneconomical, and the effect is not ideal. It is often necessary to use several methods at the same time to solve the problem of the negative moment area of ​​the composite beam

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