【摘要】 为了合理设计防止落梁装置,应用考虑支座破坏影响的非线性动力计算方法研究了防止落梁装置的地震响应.分别比较了防止落梁装置的不工作长度、装置的刚度、地震强度、地震波波形、梁端与桥台之间的地震碰撞对装置承受最大地震荷载的影响.结果表明,不工作长度的增加可以降低防止落梁装置承受的最大地震荷载.梁端与桥台之间的地震碰撞可让桥台分担部分地震荷载,但是撞击力对桥梁的安全性带来不利的影响.提高防止落梁装置的刚度不利于装置和桥梁结构的设计.防止落梁装置应具备承受梁体重量以上的承载能力.更多还原

【Abstract】 To reasonably design the girder falling restrainer,the nonlinear seismic response of the restrainer was investigated considering the failure process of the bearings.The effects of gap length and stiffness of the restrainer,the ground motion strength,wave shape of ground motion and the collision between the girder and the abutment on the seismic load applied on the restrainer were compared.The results show that the increase of the gap length may decrease the maximal seismic load applied on the restrainers.The percussive force endangers the safety of the bridge,while the abutment is subject to part of the seismic load because of the collision.The increase of the stiffness in the restrainer doesn’t benefit the structural design of the restrainer and the bridge.The restrainer should at least afford the weight of the girder.更多还原