H-shaped steel-concrete composite beam sub-stress adjusting device and adjusting method thereof

Abstract

The invention particularly relates to an H-shaped steel-concrete composite beam sub-stress adjusting system and an adjusting method thereof. The features are that the H-shaped steel-concrete compositebeam is composed of an H-shaped steel main beam, a concrete bridge deck slab and shear nails. According to the method for adjusting the sub-stress, elevation adjustment is conducted on the basis of the actually-measured counter-force generated after the steel main beam is installed and by means of jacking equipment, such as a jack and the like, through a method of filling a steel plate in the position of a support, thus realizing redistribution of the bearing counter-force, optimizing the state of the internal force of the structure, and reducing the adverse effect of the sub-stress on the structure. Through simple technical means, the sub-stress of the composite beam can be effectively adjusted, the structural stress state is improved, the anti-cracking performance of the concrete bridgedeck slab is enhanced, and the service life of the structure is prolonged.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to an I-shaped steel-concrete composite beam secondary stress adjustment device and adjustment method. Background technique [0002] The concept of "composite beams" formed by the joint action of reinforced concrete bridge decks and steel beams through shear bonds originated in Germany in the 1930s and was widely used in the climax of European and American transportation construction in the 1960s. By the 1990s, beam composite bridges were rapidly promoted in European countries and Japan, and became the mainstream bridge type of long-span beam bridges. [0003] In the 21st century, my country has made many innovations and developments in the design theory of composite structure bridges, the construction form of interface connectors, and construction technology, which has made composite structure bridges widely used. [0004] The main forms of composite structure bridges a...

AI Technical Summary

Problems solved by technology

[0006] The composite beam is an open cross-section. During the installation of the steel structure, since the composite structure has not yet been formed with the concrete, the structural rigidity is weak. In addition, the manufacturing and installation accuracy errors during the construction period, the settlement of the temporary support, etc., easily lead to secondary stress on the steel beam. And then affect the state of the internal force of the structure

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