Abstract

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Title:: Influence of Parameters of Rubber Gasket on Mechanical Characteristic of Curved Bridge

Author(s):: SONG Bo; CHENG Jing-xia; WANG Yan-xu; BI Ze-feng; School of Civil and Environmental Engineering, University of Science and Technology Beijing

Keywords:: curved bridge; rubber gasket; mechanical characteristic; gap value; hardness

Abstract:: The calculation model was established based on a curved bridge with twolinking, and the influences of parameters of rubber gasket on mechanical characteristic of curved bridge were studied. The results show that application of rubber gasket make the rotation center of curved bridge transfer and the offset direction change. When rubber gasket is arranged, the stiffness of rubber gasket should be considered to ensure that the maximum force of gasket doesn’t exceed the limit value, and the deviation of beam body is avoided. The impact of beam body and block stop can be reduced by addition of gasket, and the curvature ductility demand coefficient of pier bottom can be reduced. The utilization rate of rubber gasket decreases obviously and the load of relative gasket increases with the increase of gap value. Under the premise of ensuring the normal service deformation requirements of temperature of curved bridge, the gap value should be reduced as far as possible. With the increase of hardness, the strength of rubber gasket increases, the deformation ability is weakened, and the utilization rate of rubber gasket is reduced. It is suggested that the Shore hardness value of 55 is taken as the first choice of rubber gasket.