中文摘要：

以长沙三汊矶湘江大桥为工程背景,基于桥梁地震动方程建立空间非线性有限元模型,研究粘滞阻尼器参数、安装位置对自锚式悬索桥减震效果的影响.计算结果表明：地震作用下主梁和塔顶纵向位移及塔底纵向弯矩均较大,对自锚式悬索桥的设计起控制作用;选择合理的阻尼器参数能够对结构的位移及内力进行有效控制;阻尼器的安装位置对减震效果影响很大,设计过程中应充分考虑不同控制截面内力及位移的变化情况来对阻尼器进行合理设置.

英文摘要：

By taking the Sanchaji Xiangjiang bridge as is established based on the seismic dynamic equation the research object, a spatial nonlinear finite element model of bridge. The proposed model is then used to analyze the effects of the parameters and location of viscous damper on the mitigation to seismic response of self-anchored suspension bridge. The results indicate that the longitudinal displacements of the girder and the pylon top as well as the longitudinal moment of the pylon bottom are quite great under the action of earthquake, that appropriate damper parameters help to effectively reduce the displacement and internal force of the bridge, that the installation position of the damper greatly affects the seismic response, and that the variations of internal force and displacement in different control sections should be fully considered in the installation of viscous dampers.