【摘要】 为了研究行波效应与波的相干效应对超长结构的影响,用拟地震动合成的方法对超长结构支座激励采用不同的拟地震动.在运用随机理论中最大估计法保证所拟合地震波精度的条件下,分析该土层分布与场地位置对拟地震动的影响.用大刚度法对某双层柱面网壳结构进行多点激励计算和反应谱计算,比较该两种方法计算的杆件内力.结果显示多点输入对支座和跨中处的弦杆影响较大.更多还原

【Abstract】 In order to analyze the impact of the wave’s incoherence effect and traveling wave effect,a long span structure using artificial ground motions at different supports is calculated under multi-support excitations.To ensure the precision of the result,maximum estimation of random vibration theory is used.The influence of soil distribution and site location are analyzed for ground motion.In this paper,double layers cylindrical reticulated shell is calculated under multi-support excitations and respond spectrum calculation through the method of rigidity.After that,the element forces of the two methods are compared in this paper.The result reveals that the effect is greater at chord member of supports and mid-span.更多还原