Influences of the cushion and extended foundation on the seismic performance of high arch dams

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (18) : 203-208.

CHEN Jianyun1,LIU Xiaopeng2,LI Jing1,XU Jianrong3,HE Mingjie3

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Abstract

The seismic weak points of arch dams include dam heels and abutments etc. The enlarged foundations are usually applied as the treatment measures for unfavorable topography and geological conditions, the effects of these measures on seismic damage of high arch dams are analyzed. The displacement, transverse opening and the damage volume ratio of arch dam with enlarged foundation are compared under the earthquake action with different overload multiples. , the protection effect of different design schemes on the seismic capacity of the dam is determined. The results indicate that enlarged foundation is beneficial to the overall seismic performance of arch dam and can effectively reduce the damage degree and damage extent of arch dam surface in spite of the increasing of opening of edge joint , The results have reference significance for similar projects

Key words

arch dam / cushion / extended foundation / earthquake

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CHEN Jianyun1,LIU Xiaopeng2,LI Jing1,XU Jianrong3,HE Mingjie3. Influences of the cushion and extended foundation on the seismic performance of high arch dams[J]. Journal of Vibration and Shock, 2020, 39(18): 203-208

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