德泽面板堆石坝地震响应及抗震措施

采用三维非线性有效应力地震反应分析及安全评价的方法,分析了德泽面板堆石坝在正常蓄水位和地震共同作用下的动力响应,包括加速度响应、应力响应和位移响应,进而分析了坝体的抗震安全性;采用动力时程线法和动力等效值法分析了面板及下游坝坡在地震作用下的边坡抗滑稳定性;在动力反应成果分析的基础上,针对性地提出了相应的大坝抗震措施.研究结果表明:德泽面板堆石坝在设计地震作用下整体是稳定的,但在强震作用下有局部损坏,可修复使用,采用相应抗震措施可减轻震害,确保大坝的整体安全.地震响应分析成果及相应的抗震措施对类似工程具有重要的参考价值.

Seismic response of Deze concrete faced rockfill dam and aseismic measures

The normal operation of a reservoir is directly influenced by the earthquake resistance ability of the concrete faced rockfill dam in the area of high earthquake intensity.By adopting seismic response analysis method based on 3D nonlinear effective stress and safety evaluation method,under the action of normal reservoir level and earthquake,the seismic responses including acceleration response,stress response and displacement response of the Deze concrete faced rockfill dam,are analyzed.Also,the safety of earthquake resistance is obtained.Furthermore,sliding stabilities of the face and the downstream slope of the dam are obtained by dynamic time-history method and dynamic equivalence value method respectively.Based on the seismic response analysis results,the corresponding aseismic measures are proposed.The research results show that,the Deze concrete faced rockfill dam is globally stable under earthquake action.Under strong earthquake action,local damage may occur but can be repaired for use.Aseismic measures can release the seismic damage and ensure the global safety of the dam.The seismic response analysis results and the corresponding aseismic measures are valuable to the similar engineering.