Numerical Simulation Analysis of the Connection Structure Between the Pier and Pile Cap of Precast Concrete Bridge Piers

The precast concrete bridge pier in Ganzhou City, Jiangxi Province, China, was used as the research object to compare the longitudinal and transverse force differences of the bridge pier and further analyze the force characteristics of the bridge pier connection structure. The refined nonlinear finite element model with the load direction and axial pressure ratio as the variation parameters was established to analyze the horizontal force-displacement curve, anchor force, shear force of notched perfobond connector, strain distribution of steel jacket and notched perfobond connector-concrete relative slip. The results show that the concrete damage, anchor bolt action, strain distribution of steel jacket and notched perfobond connector-concrete relative slip are different in the longitudinal and transverse direction of the bridge pier. The bearing capacity of large axial pressure piers is larger than that of small axial pressure piers. The compression side damage of precast piers occurs at the concrete interface above the connection device. The shear force of outer notched perfobond connector is less than that of inner notched perfobond connector.

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