Rigid connection structure form of double-layered steel box concrete pier column and steel beam and construction method

Abstract

The invention discloses a rigid connection structure form of a double-layered steel box concrete pier column and a steel beam and a construction method. The rigid connection structure form comprises the double-layered steel box concrete pier column and a steel box beam at the upper part or a steel-concrete combined beam; the steel box beam or a top flange plate of the steel-concrete combined beam, a bottom plate and web plates are welded to form a whole body; bottom plate reinforcing ribs are arranged on the bottom plate; a transverse separation plate is arranged between the web plates; cotters are further arranged on the top flange plate of the steel-concrete combined beam and a concrete roof is poured on the cotters; the bottom plate is disconnected at a node connecting part and the double-layered steel box concrete pier column is inserted; an outer steel plate of the double-layered steel box concrete pier column is welded with the bottom plate and the top flange plate; reinforcing ribs are welded among the outer steel plate of the double-layered steel box concrete pier column and an inner steel plate of the double-layered steel box concrete pier column, and the web plates; the reinforcing ribs are provided with holes and steel bars penetrate into the holes. The node rigid connection structure form disclosed by the invention is used for a continuous rigid-structure bridge or a steel-concrete combined continuous rigid-structure bridge.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a structural form and a construction method for the rigid connection between a double-layer steel box concrete pier column and a steel beam. Background technique [0002] In addition to the general advantages of steel tube concrete such as high bearing capacity, good plasticity and toughness, and good economic effect, the double-layer steel box concrete pier also has the following characteristics: (1) The section is expanded and the bending rigidity is large; (2) The self-weight is light , high rigidity-to-weight ratio; (3) The fire performance is better than that of solid steel-filled concrete; (4) The inner and outer steel pipes are used as formwork, which can effectively speed up the construction progress. As a new type of composite component, double-layer steel box concrete has self-evident advantages as a structural form of bridge piers. The rigid frame bridge i...

AI Technical Summary

Problems solved by technology

[0003] Traditional rigid frame bridges generally use concrete piers and concrete superstructures, which have obvious defects: the quality of the construction stage is not easy to control, it is difficult to guarantee the quality, the construction period is long, and the investment cost is high; diseases are prone to occur in the later operation stage, and the symptoms are not cured; the concrete structure The self-heaviness limits the span of the bridge

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