高烈度震区某独塔斜拉桥抗震性能优化

Optimization of Seismic Performance of a Single-pylon Cable-stayed Bridge in High Intensity Earthquake Area

介绍了位于8度地震区某主跨163 m独塔混合梁斜拉桥的抗震设计,采用midas有限元分析软件对主桥结构进行非线性时程分析与抗震性能验算。通过设置阻尼器、改变支座类型等措施限制主桥的横向地震位移、降低主桥地震响应,从而达到优化主桥抗震性能、降低工程造价的目标。

This paper introduces the seismic design of a single-pylon composite girder cable-stayed bridge with the main span 163 m located in 8-intensity earthquake area. The finite element analysis software of Midas is used to carry out the nonlinearity time-procedure analysis and the seismic performance checking calculation of the main bridge structure. The measures of installing the damper and changing the support type restrict the transverse seismic displacement of the main bridge and reduce the seismic response of the main bridge so as to reach the target of optimizing the seismic performance of the main bridge and reducing the engineering cost.