【摘要】 以构想中的1座主跨跨度达3000m的悬索桥为研究对象,建立了空间有限元模型,推导了基于大质量法的多支承激励运动方程,在此基础上研究了该桥的动力特性和非线性多支承激励地震响应,探讨了桩-土-结构相互作用、行波效应对超大跨度悬索桥地震反应的影响,综合评价了该桥的抗震性能。更多还原

【Abstract】 This paper established a dynamic model and equation of dynamic equilibrium of multisupport excitations for a superlargespan suspension bridge based on the Large Mass Method and the PseudoStatic Displacement Conception.Based on these,the dynamic characteristics and the multisupport excitations seismic response of the bridge are studied by probing into the soil foundation structure interaction effect and the wave passage effect on the seismic response.The numerical result indicates that rational modeling of the boundary condition can greatly affect the analysis result,the dynamic and seismic performance of this bridge is generally evaluated.更多还原