Well-type steel plate shear key structure and construction method of a prefabricated composite beam bridge

Abstract

The invention relates to a well type steel plate shear key structure of an assembly type composite beam bridge and a construction method thereof. The well type steel plate shear key structure of the assembly type composite beam bridge comprises a steel beam, a prefabricated concrete plate and a steel plate shear key, wherein the steel beam is provided with an upper flange plate, and the upper surface of the upper flange plate is welded with the steel plate shear key; the prefabricated concrete plate is supported onto the upper flange plate and provided with a columnar polygonal groove, and the upper-layer bars of the prefabricated concrete plate are exposed from the upper portion of the inside of the columnar polygonal groove; the steel plate shear key is accommodated inside the columnar polygonal groove; the upper-layer bars of the prefabricated concrete plate and the steel plate shear key are welded through L-shaped bars. The well type steel plate shear key structure of the assembly type composite beam bridge has the advantages of being large in welding area, high in force transmission efficiency, capable of eliminating local stress concentration, harmonious in longitudinal deformation and reliable in connection; the applied connecting manner facilitates cooperative work of the steel beam and the concrete plate and improves the reliability of the connected parts of a composite beam. Therefore, the well type steel plate shear key structure of the assembly type composite beam bridge is an advanced and reliable shear key structuring mode.

Description

【Technical field】 [0001] The invention relates to a composition structure of an assembled composite girder bridge, in particular to a well-type steel plate shear key structure of an assembled composite beam bridge and a construction method thereof, belonging to the technical field of bridge engineering. 【Background technique】 [0002] The steel-concrete composite girder bridge can give full play to the characteristics of steel and concrete, and it is a bridge structure with excellent performance. The shear key connection structure is a key component connecting the steel girder and the concrete bridge deck, and a reasonable shear key connection structure can fully ensure that the two work together. [0003] The shear key connection structures of traditional composite bridges mainly include studs and PBL, which are connected through the cooperation of the shear studs on the steel beam and the concrete. These two connection methods mainly have the following disadvantages: 1. T...

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Problems solved by technology

These two connection methods mainly have the following disadvantages: 1. The contact area between the stud and the concrete is small, the welding reliability is low, and the force transmission efficiency is also low; 2. The longitudinal direction of the PBL shear key is a steel plate, and the horizontal direction is a steel bar. There is a large difference in stiffness in the directions, the overall stiffness is small, and the force transmission is unbalanced

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