Numerical Simulation Of Haihe Bridge Based On Multi-Scale Model

This paper takes the Haihe Bridge which is under construction as project background. Construction process of the whole bridge and of the deck were simulated, two types of the connector arrangement schemes were considered in the deck construction simulation. Work accomplished is as follows:Firstly, a macroscopic finite model of the Haihe Bridge was established with ANSYS finite element software. According to the calculation results based on the macroscopic finite model and features of the structure, joints that need refined modeling was confirmed, and based on that, the multi-scale model of the bridge was established. Birth-death element method was used to simulate the construction process of the bridge based on the multi-scale model. Shrinkage and creep of the concrete was considered. On the basis of the simulation results, the stress distribution and variation of refined joints model and the displacement distribution of the whole bridge under different load cases was summarized.The uplift restricted-lift free connector arranged on the upper chord in the negative moment zone of the truss was simulated with a type of spring element. A new simulation method that allows for the change of the joint condition between the upper chord and the concrete deck was proposed. Two types of the connector arrangement schemes were separately considered and simulated. The simulation results was compared to the results acquired without considering the horizontal bond between upper chord and concrete deck. It’s found that both schemes results in smaller deflection of the bridge and compression on the upper chord. The arrangement of the connector affects little on the tension stress distribution of the deck in the negative moment zone of the structure.