考虑支座摩擦滑移的弯梁桥侧向位移分析

Analysis of Lateral Displacement of Curved Girder Bridge Considering Friction Sliding of Bearing

为了分析板式橡胶支座的摩擦滑移对混凝土弯梁桥侧向位移的影响,采用ANSYS建立板式橡胶支座的三维实体模型和背景桥梁的单梁模型,分别计算考虑支座摩擦滑移与未考虑支座摩擦滑移弯梁桥侧向位移和不同工况下支座的荷载-位移曲线。结果表明,当横向力较小时,是否考虑支座摩擦滑移对侧向位移影响很小;当横向力较大时,考虑支座发生侧向滑移,其抗剪刚度减小,弯梁桥侧向位移明显增大;荷载-位移曲线表明横向力较大时,支座发生明显滑移。

In order to analyze the influence of friction sliding of plate rubber bearing on lateral displacement of concrete curved girder bridge,a three-dimensional entity model was built to simulate the plate rubber bearing and a single beam bridge using ANSYS.The lateral displacement of curved girder bridge was calculated with and without considering friction sliding of the bearing.And the load-displacement curves of plate rubber bearing under different working conditions were obtained.The results show that when the lateral force is small,friction sliding of bearing has little effect on the lateral displacement.However,when the lateral force is large,the bearing slides laterally and the shear stiffness decreases,resulting in a significant increase in the lateral displacement of the curved girder bridge.The load-displacement curve shows that the bearing slips obviously when the lateral force is large.