【摘要】 为探讨碳纤维复合材料(CFRP)索斜拉桥的阻尼器减震控制适用性及设计参数选取,以苏通大桥为背景,建立钢索斜拉桥的有限元模型,根据等轴向刚度准则换索得到CFRP索斜拉桥模型。采用时程分析法对所取目标函数作参数敏感性分析,并对2种索的斜拉桥减震控制效果进行比较,得到粘滞阻尼器设计参数的合理取值范围。分析表明:主梁端附加阻尼器对斜拉桥结构的减震控制有很好的补充作用;阻尼器参数相同时,CFRP索斜拉桥可获得较优的减震效果。更多还原

【Abstract】 To study the applicability and design parameter selection for seismic-reduction control of the viscous dampers for cable-stayed bridge with carbon fiber reinforced plastics(CFRP) cables,the Sutong Bridge was taken as the research object,the finite element model of the cable-stayed bridge with steel cables was established and the model of the bridge with the CFRP cables was then obtained by replacement of the steel cables according to the principle of equivalent axial rigidity.The time-history method was used to conduct the parameter sensitivity analysis of the selected object functions and the effect of the seismic-reduction control of the viscous dampers for the bridges respectively with the CFRP cables and steel cables was compared to find out rational value range of the design parameters of the dampers.The results of the analysis show that the dampers attached at the ends of the main girders of the bridges have very good supplementary action to the seismic-reduction control.At the time the parameters of the dampers are identical,the bridge with the CFRP cables can achieve better effect of the seismic-reduction control.更多还原