Fully assembled b-g connection steel-concrete composite beam bridge

Abstract

The invention discloses a fully assembled B-G connected steel-concrete composite girder bridge, which comprises a steel girder and a prefabricated concrete bridge slab. The shear structure is composed of a shear groove set between the upper surface of the steel beam and the prefabricated concrete bridge slab and a shear convex line embedded in the shear groove. The pull-out structure is fastened to the steel beam by an assembly and the anti-pull bolts between the prefabricated concrete bridge slabs, the present invention changes the conventional shear key, which undertakes the dual functions of shear resistance and pull-out resistance, into two single-function connections of shear resistance by shear grooves and anti-pullout by bolts. The combination of components significantly simplifies the block prefabricated bridge slab and steel beam segment and its connection structure, realizes a higher quality, more efficient, more economical, and more environmentally friendly fully assembled composite bridge construction method, and realizes easy inspection ( No concealed engineering), convenient maintenance, and replaceable operation and maintenance goals when building bridges to ensure that the bridges are convenient to build and safe to use.

Description

technical field [0001] The invention belongs to the field of building structures and bridge engineering, in particular to a fully assembled B-G connecting steel-concrete composite beam bridge. Background technique [0002] The steel-concrete composite structure has obvious advantages in terms of material strength, convenient and fast construction, reliable structural performance, and low energy consumption, so it has become more and more the development trend of bridge structures; due to the combination of steel structure and concrete bridge slab The materials and characteristics are different, so how to connect the two easily and quickly to make the long-term reliable performance is a problem that the engineering community has been exploring and solving. [0003] In the prior art, the connection structures between steel girders and concrete bridge slabs are divided into two categories. One is to set shear keys along the longitudinal direction on the joint surface of steel b...

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Problems solved by technology

[0006] In order to solve the above problems, a Chinese patent (ZL201310130786.4) named PCSS shear force coupling structure appeared, which disclosed a steel-concrete composite structure, using pre-embedded shear force transfer steel plates on the rib side of the prefabricated concrete bridge slab, in the Install the prefabricated bridge slab in place on the steel beam, and apply longitudinal prestress to the concrete bridge slab according to the design requirements, and then transfer the pre-embedded shear force on the rib side of the prefabricated concrete bridge slab to the longitudinal joint formed by the steel plate and the top surface of the steel beam The steel-concrete composite beam is formed by welding and connecting, realizing the construction of a fully assembled steel-concrete composite beam bridge without the need for cast-in-place concrete, and overcoming the prestressing of the concrete bridge slab in conventional steel-concrete composite continuous beam bridges The problem of poor effectiveness

This patent converts the concrete of the conventional prefabricated composite girder into the longitudinal joint of the pre-embedded shear transfer steel plate on the rib side of the bridge slab welded on site and the longitudinal joint of the top surface of the steel beam to realize the combination of the two. There is a large amount of on-site welding work, and it is difficult to guarantee the quality of on-site welding. At the same time, the PCSS shear force coupling structure is also difficult to realize the replaceability of the bridge deck components in the later stage.

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