Variable-section structure of stiff beam and construction method thereof

Abstract

The invention discloses a variable-section structure of a stiff beam and a construction method thereof. The variable-section structure comprises a section-steel keel, a steel bar skeleton distributed at the periphery of the section-steel keel and beam concrete cast on the outer sides of the section-steel keel and the steel bar skeleton, wherein the section-steel keel is of a variable-section structure and is divided into a first section of section-steel keel and a second section of section-steel keel from a variable-section boundary part; the steel bar skeleton comprises beam-top main bars and beam-bottom main bars; the beam-top main bars are disconnected from the variable-section boundary part and are divided into first sections of beam-top main bars and second sections of beam-top main bars; one end of each first section of beam-top main bar is connected with a stiff column at one corresponding side, and the other end of each first section of beam-top main bar is connected with each vertical connection plate; and one end of each second section of beam-top main bar is connected with each stiff column at one corresponding side, and the other end of each second section of beam-top main bar is bent downwards at the variable-section boundary part and is correspondingly connected with a group of vertical connection plates. The variable-section structure and the construction method disclosed by the invention have the advantage that the technical problem of difficulty in connection of multiple rows of large-diameter main bars in the traditional variable-section stiff beams at the sudden-changed section is solved.

Description

technical field [0001] The invention belongs to the field of construction engineering, in particular to a variable section structure of a stiff beam and a construction method thereof. Background technique [0002] At present, stiff structures are widely used in super high-rise structures. Stiff structures are a new type of composite structure formed by steel frames wrapped with reinforced concrete. This new structure has higher bearing capacity, higher ductility, better Durability and fire resistance, etc., but due to the structural characteristics of the rigid structure, the joints are often complicated, and the arrangement and connection of the steel bars are difficult. The actual difficulty in the on-site construction is often one of the key factors restricting the construction period and construction quality. , especially for variable-section stiff beams with multiple rows of large-diameter main reinforcements, which have large spans, large cross-sections, obvious cross-...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable cross-section structure of a stiffened beam and its construction method, to solve the technical problem of difficulty in connecting multiple rows of large-diameter main reinforcements at sudden cross-section positions in a traditional variable-section stiffened beam

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