Analysis Of Shock Absorption Strategy Of Cable-stayed Bridge

It is well known,in general,that the highway bridge is the hinge of transportation,and has a significant impact on the national economy.And its seismic problem is one of the most challenging and concerned issues.With the continuous advances in bridge construction technology,the long-span cable-stayed bridge has developed rapidly and more people have paid attention to its seismic problem.There’s a direct relationship between the seismic performance and seismic reduction strategy.Therefore,the study of long-span cable-stayed bridge with longitudinal and transverse seismic reduction strategy in both directions to ensure safety during the earthqueake is of great importance of economic and social value.To carry out the study of longitudinal seismic reduction strategy of long-span cable-stayed bridges,firstly the simplified analysis method of the floating system/semi-floating system of cable-stayed bridges is introduced in detail.Then using two common devices of seismic reduction(viscous dampers and elastic cord),longitudinal seismic reduction strategic analysis of some key design parameters of the devices of the long-span cable-stayed bridge is discussed.The effect on the structural seismic response of long-span cable-stayed bridge is als analyzed.Finally,according to the results of the analysis in this paper proposed bridge damping device parameters recommended value.To carry out the study of transverse seismic reduction strategy of long-span cable-stayed bridges,firstly,the irrationality of the whole slide system and shock system is pointed out from the theoretical and numerical analysis of long-span cable-stayed bridge transverse to the seismic system-wide limit system.And then,based on this project example,three seismic isolation devices are selected,and the principles are discussed in detail the different shock damping device parameter selection and optimization problem,and finally comparative analysis of the different damping system the merits of the application provides data for engineering support and practical reference.