| 鲤鱼潭大坝在集集地震中的变形分析 |
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| 引用本文： | 刘振平,迟世春.鲤鱼潭大坝在集集地震中的变形分析[J].岩土力学,2014,35(1):248-254. |
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| 作者姓名： | 刘振平 迟世春 |
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| 作者单位： | 1.大连理工大学 建设工程学部，辽宁 大连 116024；2. 黑龙江工程学院 土木与建筑工程学院，哈尔滨 150050 |
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| 基金项目： | 国家自然科学基金(No. 51179024，No. 51379029) |
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| 摘 要： | 鲤鱼潭黏土心墙堆石坝在台湾"9·21"集集地震中有一定的变形损伤。为了研究大坝的地震破坏机制,分析了大坝的永久位移分布规律,同时采用有限元数据平滑方法,对大坝位移监测数据进行处理,得到了大坝的永久应变场。结果表明,大坝在强震作用下永久变形指向坝内,坝体体积整体收缩;由于反滤料孔隙水压力上升,有效应力降低,在上游坝体在反滤层附近出现拉应变;在两岸坝肩与基岩交界部位存在拉应变,易造成拉伸裂缝。
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| 关 键 词： | 鲤鱼潭心墙堆石坝 集集地震 有限元数据平滑 永久变形 破坏机制 |
| 收稿时间： | 2012-10-28 |
Analysis of deformation of Liyutan dam after Chi-chi earthquake |
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| LIU Zhen-ping,CHI Shi-chun.Analysis of deformation of Liyutan dam after Chi-chi earthquake[J].Rock and Soil Mechanics,2014,35(1):248-254. |
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| Authors: | LIU Zhen-ping CHI Shi-chun |
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| Institution: | 1.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2. College of Civil and Architecture Engineering, Heilongjiang Institute of Technology, Harbin 150050,China |
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| Abstract: | Liyutan earth core rockfill dam was subjected to some deformation damage in the 9•21 Chi-chi earthquake. The permanent displacement distribution rule of the dam is analyzed for exploring seismic failure mechanism of the dam. Moreover, based on the finite element data smoothing method, the permanent strain of the dam is obtained by processing the monitored displacement data. The results reveal that the permanet deformation point to interval dam body and the dam volume is global contraction under strong earthquke. There are tension strain in the upstream dam body slide along the filter layer beacause the pore water pressure of filter material increase and the effective stress decrease. The borders of dam body and bank slopes suffered from the tension, so there easily form tensile fissure. |
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| Keywords: | Liyutan earth core rockfill dam Chi-chi earthquake FEM data smooth permanent deformation damage mechanism |
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