Acceleration distribution in earth-rock dams under near-fault ground motion

XU Bin1,2,LI Sihan2,PANG Rui1,2

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 66-72.

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PDF(2478 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 66-72.

Acceleration distribution in earth-rock dams under near-fault ground motion

  • XU Bin1,2,LI Sihan2,PANG Rui1,2
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Abstract

In order to study the acceleration distribution of earth-rock dams under near-fault pulse ground motion, a random ground motion model was established based on the records of near-fault pulse ground motion in Jiji, Taiwan, and the random dynamic analysis of earth-rock dams with different heights was conducted to study the dynamic distribution coefficient of the dam body. The results show that the low frequency velocity pulse of ground motion near the fault makes the acceleration response spectrum of the dam body have a wide sensitive section, which easily covers the natural vibration period of the dam body and significantly increases the acceleration of the dam body. By summarizing the acceleration distribution law, the dynamic distribution coefficient near the fault seismic area is suggested, which can provide reference for seismic resistance of earth-rock dam.

Key words

Near-fault pulse type ground motion / Random simulation / High earth-rock dam / Acceleration distribution coefficient

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XU Bin1,2,LI Sihan2,PANG Rui1,2. Acceleration distribution in earth-rock dams under near-fault ground motion[J]. Journal of Vibration and Shock, 2024, 43(14): 66-72

References

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