独斜塔斜拉桥抗震的功率谱法与反应谱法分析

以厦门马新特大桥主桥为工程背景，建立塔、梁、墩固结体系独塔混合梁斜拉桥的三维空间有限元模型，对其结构动力特性和地震响应进行了计算分析。采用反应谱法和随机振动的功率谱法分别计算了E1地震作用下，结构的位移响应和内力响应，考虑了顺桥向＋竖向和横桥向＋竖向两种工况。分析表明，两种分析方法的计算结果基本一致，功率谱的计算结果较反应谱的略大。

Study on Seismic Design of Single Slanted Pylon Cable-stayed Bridge With Stochastic Vibration Analysis and Response Spectrum Analysis Methods

Based on the Xiamen Maxin main bridge,a 3-dimension finite element model is set up to simulate the hybrid girder cable-stayed bridge with single slanted pylon and fixed pier-pylon-beam system,and the structural dynamic characteristics and seismic response are analyzed in this paper.In the earthquake action E1,the stochastic vibration analysis and response spectrum analysis methods is used to calculate the displacement and internal forces response behavior of bridge structure,which subjected to two conditions of longitudinal plus vertical and lateral plus vertical.The results show that:two methods of analysis of the results are basically the same,the results of stochastic vibration analysis method are slightly larger than response spectrum analysis method.