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 region

作　　者：邹德高[1,2] 韩慧超[1,2] 孔宪京[1,2] 余翔[1,2] ZOU Degao;HAN Huichao;KONG Xianjing;YU Xiang(School of Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Coastal ＆ Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学水利工程学院,辽宁大连116024 [2]大连理工大学海岸和近海工程国家重点试验室,辽宁大连116024

出　　处：《水利学报》2018年第10期1236-1242,共7页Journal of Hydraulic Engineering

基　　金：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)

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。In the strong seismic zone of western China,many rockfill dams with heights over 200 m have been built or designed. Some of these high dams are located in the near-fault region. At present,the de-sign code is only applicable to the dams lower than 150 m,and it doesn＇t consider the characteristic ofnear fault ground motions. In this study,the finite element analysis is performed for 40 m,70 m,150 mand 200 m dams to compare the dynamic acceleration responses of the dams subject to the near-faultground motions and standard earthquake waves. The results show that the peak accelerations of the damssubjected to the near-fault ground motions are significantly greater than that subjected to standard earth-quake 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.

关 键 词：土石坝 加速度分布 近断层地震动 地震设计烈度 

分 类 号：TV312[水利工程—水工结构工程]