Journal of Food, Agriculture and Environment

Seismic safety analysis and evaluation of earth-rock dam

Author(s):

Lei Gan ^{1, 2}, Zhenzhong Shen ^{1, 2}*, Liqun Xu ^{1, 2}, Yantao Jiao ^{1, 2}

Recieved Date: 2013-06-09, Accepted Date: 2013-09-20

Abstract:

A comprehensive study method on seismic safety analysis and evaluation of a high earth-rockfill dam is established based on the initial stress field, earthquake responses, the permanent deformation, the slope stability analysis and monitoring data analysis. According to the actual engineering conditions of Bikou earth-rockfill dam, the 3-D non-linear FEM model of the dam is set up for calculating earthquake response by the dynamic time-history analysis method. The earthquake responses of the dam, including acceleration response, displacement response, stress response and the earthquake induced permanent deformation of the dam are obtained for inputting the earthquake with peak acceleration of bedrock 475 cm/s². Under the action of the seismic, the acceleration response along the up-downstream direction is maximal with the value of 4.93m/s². The maximum displacement response of dam is 36.95 mm, and the maximum principle stress responses of rockfill body are 454 kPa. The maximum earthquake induced permanent settlement is 267 mm, about 0.26 percents of the dam height. The smallest safety factors of upstream and downstream slopes are 1.09 and 1.17 respectively. Meanwhile, the earthquake responses of the dam are close to the recorded data. The theories and methods for analyzing the earthquake responses of the earth dam here are feasible, and the results are consistence with the real situation of post-earthquake.

Keywords:

Earth-rock dam, non-linear FEM, earthquake response, monitoring analysis, permanent deformation

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1905-1911

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