MECHANICAL BEHAVIOR AND SEISMIC ANALYSIS OF Y-SHAPED PIERS IN MARINE ENVIRONMENT
The Y-shaped bridge pier model of urban viaduct is established by using finite element software ABAQUS.The numerical analysis method is used to study the influence of concrete deterioration and steel corrosion on the mechanical performance of urban viaduct Y-shaped pier.The purpose is to investigate the influencing factors of the mechanical performance of Y-shaped bridge piers in urban viaducts,and to give reasonable suggestions for improving their carrying capacity.The results show that the bearing capacity of the Y-shaped piers in the marine environment will decrease with the strength of the pier concrete,and the ultimate bearing capacity of the Y-shaped piers will decrease.After the strength of the steel bar of the Y-shaped pier is corroded,the ultimate bearing capacity of the Y-shaped pier with the strength of the steel bar decreases along the direction of the bridge,and the ultimate displacement decreases compared with the service phase;Their is no obvious effect on the limit carrying capacity and limit displacement of Y type pier when the reinforcement intensity is not obvious;The stiffness degradation of the Y-shaped pier has obvious mutation points,and the stiffness begins to slow down after the mutation.
concrete deteriorationsteel corrosionfinite element modelseismic performance
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