【摘要】 本文采用土与结构相互作用的计算模型分析了长大桥梁结构的竖向地震反应。在相互作用的计算中,利用圆心位移影响函数法求得地基的动态复刚度,采用子结构技术建立结构的动态方程,通过快速傅立叶变换在频域上求解。将计算结果与刚性地基计算模型的计算结果以及同时同位相输入的计算结果比较表明:长大桥梁应采用土与结构相互作用计算模型,按多点输入计算,并进行竖向反应分析。更多还原

【Abstract】 The calculating model of soil-structure interaction is used to analyse the vertical seismic responses for long span bridge structures. During the interaction analysis, the dynamic stiffness of foundation is obtained by means of the influence function of circle centre displa cement. The substructure technique is adopted to develop the structural dynamic equation, through FFT the problem is solved. Compared foundation model with input computation shows that for long-span bridges the computation model of soil-structure interaction should be adopted, with the computation of multi-input, and the analysis of vertical soistoic responses.更多还原