邹德高,韩慧超,孔宪京,余翔.近断层地震动作用下面板堆石坝的加速度分布系数[J].水利学报,2018,49(10):1236-1242 |
近断层地震动作用下面板堆石坝的加速度分布系数 |
Acceleration distribution behavior of concrete face rockfill dams in the near-fault regio |
投稿时间:2018-03-27 |
DOI:10.13243/j.cnki.slxb.20180264 |
中文关键词: 土石坝 加速度分布 近断层地震动 地震设计烈度 |
英文关键词: rockfill dams acceleration distribution near-fault ground motion seismic design intensity |
基金项目:国家重点研发计划项目(2017YFC0404904);国家自然科学基金项目(51779034);中央高校基本科研业务费项目(DUT17ZD219) |
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中文摘要: |
我国西部地区有很多已建、在建及拟建的高土石坝工程,坝高已达200 m以上,这些高坝有的位于地震断裂带附近。规范中关于地震加速度动态分布系数的规定仅适用于高度70 m(8、9度烈度)和150 m(7度烈度)以下的大坝,且没有考虑近断层地震动的特点。本文分别对高度为40、70、150和200 m面板坝进行动力反应分析,将规范谱人工波与近断层地震动作用下面板堆石坝的加速度反应进行对比。结果表明,近断层地震动作用下的大坝最大加速度明显大于规范谱人工波。通过总结近断层区域大坝的加速度分布规律,建议了适用于近断层区域面板堆石坝的加速度分布系数,可为大坝的抗震设计提供参考。 |
英文摘要: |
In the strong seismic zone of western China, many rockfill dams with heights over 200m have been built or designed. Some of these high dams are located in the near-fault region. At present, the design code is only applicable to the dams lower than 150m, and it doesn't consider the characteristic of near fault ground motions. In this study, the finite element analysis is performed for 40m, 70m, 150m and 200m dams to compare the dynamic acceleration responses of the dams subject to the near-fault ground motions and standard earthquake waves. The results show that the peak accelerations of the dams subjected to the near-fault ground motions are significantly greater than that subjected to standard earthquake waves. Therefore,a suggested acceleration distribution figure of the rockfill dam in the near-fault region is proposed,which offers a reference for the aseismatic design. |
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