Modular steel-concrete composite bridge model and method for bridge damage identification test

Abstract

The invention discloses a modularized steel-concrete combined bridge model and a method for a bridge damage identification test, comprising a bridge abutment base, a bridge support, a steel main beam,a cross beam, a concrete bridge deck, a connecting device between the steel main beam and the cross beam, a connecting device between the steel main beam and the concrete bridge deck, a concrete bridge deck connecting device and a control device for steel main beam damage cracking, wherein the bridge abutment base and the bridge support are used for supporting the steel-concrete combined bridge and simulating different boundary conditions; the single steel main beam is connected with the concrete bridge deck through the connecting device between the steel main beam and the concrete bridge deck; the concrete bridge deck connecting device is used for simulating a hinge joint between the steel-concrete combined beam and the concrete bridge deck; the cross beam and the connecting device between the steel main beam and the cross beam are used for simulating the traverse connection of the steel main beams in the steel-concrete combined beams; the control device for steel main beam damage cracking is used for simulating the steel main beam damage of web cracking at different positions and different heights and the damage of different degrees of the lower flange plate of the steel main beam.

Description

technical field [0001] The invention belongs to the technical field of bridge model tests, in particular to a modular steel-concrete composite bridge model used for bridge damage identification tests and a using method. Background technique [0002] The steel-concrete composite bridge is a bridge composed of steel girders or steel trusses and reinforced concrete bridge decks through shear connection keys. Compared with reinforced concrete bridges, it has the advantages of light weight, good anti-seismic effect, small cross-sectional size, saving formwork and formwork, and short construction period. Compared with steel beams, it has the advantages of small steel consumption, high rigidity, stability, fire resistance and durability. In recent years, steel-concrete composite bridges have been widely used in urban overpass bridges and building structures in my country, and are one of the main development directions of future structural systems. [0003] The subsequent operatio...

AI Technical Summary

Problems solved by technology

At present, there are few experimental model systems for damage identification of steel-concrete composite girder bridges, especially for various damage conditions in practical applications, and the lack of effective test simulation methods also limits the research on related damage identification methods.

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