Design Method for Shear Resistance of Orthotropic Steel-Concrete Composite Bridge Deck Interface

Abstract

The invention discloses a design method for shear resistance of an orthotropic steel-mixed composite bridge panel interface. The orthotropic steel-mixed composite bridge panel interface stressed spatially is equivalent to continuous beam on multiple supports stressed in a single direction and the interlaminar shear force is calculated, so that anti-shear connectors are arranged and designed. The design method comprises the following steps: 1, calculating a mid-span section bending moment linear coefficient (mu) of a wheel load on two cross diaphragm plates; 2, calculating longitudinal calculating width (b0) of the orthotropic steel-mixed composite bridge panel; 3, calculating the equivalent elastic support stiffness (K) of a longitudinal rib; 4, based on the calculating results obtained inthe previous three steps, constructing a cross bridge calculating model of the orthotropic steel-mixed composite bridge; 5, calculating the cross bridge interlaminar stress as shown in the specification by adopting a structural mechanical method; and 6, arranging and designing the shear pieces. The method disclosed by the invention overcomes the defects that a conventional finite element calculating and modeling workload is great and the method does not have universality for different projects, is clear in mechanical concept and high in practicality, and is conveniently applied to anti-sheardesign of the orthotropic steel-mixed composite bridge panel interface.

Description

technical field [0001] The invention relates to bridge engineering technology, in particular to a design method for shear resistance of an orthotropic steel-concrete composite deck interface. Background technique [0002] The bridge deck formed by connecting the steel roof, longitudinal stiffeners and transverse stiffeners through welds is called orthotropic steel bridge deck, and it is called "orthotropic" because of the obvious difference in stiffness in the longitudinal and transverse bridge directions. , it is widely used in large and medium-span bridges due to a series of advantages such as light weight, large ultimate bearing capacity, and short construction period. In order to improve the stiffness of the bridge deck and protect the steel structure, the orthotropic steel deck is usually welded with shear members before pouring concrete to form an "orthotropic steel-concrete composite bridge deck" with the orthotropic steel deck. Studies have shown that the relative s...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for orthotropic steel-concrete composite bridge decks to address the shortcomings of the traditional finite element analysis method, which has a large amount of modeling and analysis work, can only obtain discrete numerical solutions, and has no versatility. The Design Method of Interface Shear Resistance

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