反应加速度法和反应位移法精度随结构埋深变化的研究

发布时间：2018-04-28 05:57

本文选题：反应加速度法 + 反应位移法　；参考：《振动与冲击》2017年14期

【摘要】：从理论方程上,看不出反应加速度法和反应位移法的精度会随地下结构埋深而变化,因此为确定其精度,设定不同场地条件下、不同埋深的城市轨道交通箱型地下结构为基准模型。使用反应加速度法、反应位移法、修正的反应位移法和时间历程法计算基准模型的结构内力,评价前三种方法随埋深变化的精度。结果表明:前三种方法的精度会受到场地类型、土层厚度和结构埋深的影响;若以时间历程法为基准,反应位移法的精度要低于反应加速度法和修正的反应位移法;反应加速度法和修正反应位移法的精度受埋深影响较小,反应位移法在埋深较小时精度尚可。
[Abstract]:From the theoretical equation, it can not be seen that the accuracy of the reactive acceleration method and the reactive displacement method will vary with the buried depth of the underground structure. The box type underground structure of urban rail transit with different buried depth is the benchmark model. The structural internal forces of the reference model are calculated by the reactive acceleration method, the reactive displacement method, the modified reactive displacement method and the time history method, and the accuracy of the first three methods with the variation of the buried depth is evaluated. The results show that the accuracy of the first three methods is affected by the site type, the thickness of the soil layer and the depth of the structure, and the accuracy of the response displacement method is lower than that of the response acceleration method and the modified response displacement method if the time history method is taken as the reference. The accuracy of the reactive acceleration method and the modified reactive displacement method is less affected by the depth of burying, but the precision of the reactive displacement method is better when the depth of buried is small.
【作者单位】：河南大学材料与结构研究所;中铁二院华东勘察设计有限责任公司;
【基金】：国家自然科学基金资助项目(51408195) 河南省教育厅科学技术研究重点项目(14B560031) 河南大学科研基金项目(2013YBZR002)
【分类号】：TU93;U231

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