Analysis of deformation of Liyutan dam after Chi-chi earthquake

LIU Zhen-ping; CHI Shi-chun

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Analysis of deformation of Liyutan dam after Chi-chi earthquake

更新时间：2026-06-25

- Analysis of deformation of Liyutan dam after Chi-chi earthquake
- Vol. 35, Issue 1, (2014)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV641.1
- Online First：14 January 2014，
  
  Published：2014
- 稿件说明：
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LIU Zhen-ping, CHI Shi-chun. Analysis of deformation of Liyutan dam after Chi-chi earthquake[J]. 2014, 35(1).
DOI：

LIU Zhen-ping, CHI Shi-chun. Analysis of deformation of Liyutan dam after Chi-chi earthquake[J]. 2014, 35(1). DOI：

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。

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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