Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects

陈江; 熊峰; 葛琪

doi:10.13409/j.cnki.jdpme.2015.04.004

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Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects

更新时间：2025-12-11

- Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects
- Vol. 35, Issue 4, Pages: 447-451+463(2015)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2015.04.004
  CLC： V642.4;TV312
- Published：2015
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[1]陈江,熊峰,葛琪.高拱坝强震开裂及气幕隔震效果研究[J].防灾减灾工程学报,2015,35(04):447-451+463.

陈江, 熊峰, 葛琪. Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects[J]. 2015, 35(4): 447-451+463.
[1]陈江,熊峰,葛琪.高拱坝强震开裂及气幕隔震效果研究[J].防灾减灾工程学报,2015,35(04):447-451+463. DOI： 10.13409/j.cnki.jdpme.2015.04.004.

陈江, 熊峰, 葛琪. Cracking of High Arch Dam under Strong Earthquake and Air-cushion Isolation Effects[J]. 2015, 35(4): 447-451+463. DOI： 10.13409/j.cnki.jdpme.2015.04.004.

摘要

为了研究不同地震强度下气幕的隔震及防裂效果

在气幕隔震控制的气-液-固三相耦合数值模型中考虑了坝体混凝土的开裂行为

以某300m级高拱坝为研究对象

在坝基底部输入3种不同强度的地震波

采用有限元法分别模拟坝体含气幕及无气幕工况下的动力响应。结果表明

气幕可以显著降低拱坝上游坝面的动水压力及加速度响应

并使坝体开裂范围减小;随着地震强度的增大

气幕对动水压力和坝体加速度的削减作用均有所增加;气幕厚度为1m时

上游坝面动水压力极值削减幅度超过70%

上游坝面坝顶拱冠梁处加速度极值削减幅度超过50%。

Abstract

Based on the triple phases of the gas-liquid-solid coupling model

the effects of the aircushion isolation control on the isolation and anti-cracking of the high arch dams were researched.In this study

the cracking behaviors of concrete was firstly considered in the coupling model and a numerical simulation of a 300 mlevel dam with and without air-cushion under the action of the three-different-seismic intensities was carried out by finite element method.The results indicate that the hydrodynamic pressure and acceleration responses of dam upstream face significantly reduced by the air-cushion.Additionally

cracking range of the dam body is also reduced.The isolation rule of the air-cushion is that the higher the seismic intensity

the more significant isolation effect of the hydrodynamic pressure and dam acceleration is.The maximum of hydrodynamic pressure is reduced by more than 70%

the acceleration of dam crest is reduced by more than 50%with 1mair-cushion.

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references

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