Mechanical Property of Steel-concrete Joint Section of Plate-truss Composite Structure

To get the mechanical property of steel-concrete joint section of a highway-railway cable stayed bridge deck,the nonlinear finite element analysis is performed,and a large-scale test model of steel-concrete joint section is designed based on the similarity principle.The strain and displacement of the control section and main components of the test model under loading are tested.The theoretical analysis and test result show that(1) the steel structures,concrete structures and studs of the steel-concrete composite joint have low stress levels and a strong safety reserve;(2) the relative slippage between steel and concrete is small,and the steel structure load is smoothly passed to the concrete structure.The steel-concrete composite joint has excellent work performance and reasonable structural design.The result could be a reference for design of the subject structures.