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图 13 坝体节点最大位移的残差均值图( 克隆波组; 对比波组)
测波之间的最大位移十分接近,残差均值约为 0。而未控制频率非平稳性的平稳模拟地震波,对土石
坝结构响应无偏效果较差,会较大程度上低估坝体响应,残差均值的极值能达到 - 25%,且对土体变
形越大的区域,其激励效果和非平稳地震波的差别越大。在水利工程设计中,工程师们或许应对地震
动频率非平稳性给予足够的重视和考虑。
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