【摘要】 依据减隔震原理,分别在主梁与索塔连接处设置横向弹性索、在主梁与过渡墩连接处设置横向液体粘滞阻尼器,采用非线性时程分析方法,研究其对斜拉桥横向抗震性能的影响。分析发现:合理选用弹性索,可适当降低控制截面的地震响应;限位体系和滑动体系对于横向均非理想的抗震体系,当与阻尼器共同使用时则可有效提高过渡墩及其桩基的抗震性能,但阻尼器+滑动体系会增大索塔及其桩基的地震响应,同时还会产生梁端与过渡墩顶的相对位移。更多还原

【Abstract】 Based on seismic isolation principles,lateral elastic cables are set on the joint of girder and tower,and the lateral fluid viscous dampers are set on the joint of girder and abutment.The effects of lateral cables and dampers on cable-stayed bridge are studied afterwards by using the nonlinear time-history analysis method.The results indicate that seismic responses of key sections could be properly reduced by rationally choosing elastic cables.Neither of fixed system and sliding system is an appropriate lateral anti-seismic system.Seismic performance of abutments and its pile foundations could be improved with dampers.However,seismic responses of towers and its pile foundations could be increased,and relative displacements between girder-end and abutment-top would appear by using sliding system with dampers.更多还原