基于完全耦合理论的涉水边坡地震响应分析  

Seismic Response Analysis of Hydrous Slope Based on Fully Coupled Theory

作　　者：靳聪聪 迟世春 聂章博[1,2] JIN Congcong;CHI Shichun;NIE Zhangbo(Faculty of Infrastrueture Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《水利与建筑工程学报》2018年第5期99-104,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(51379029);国家重点研发计划项目(2016YFB0201001)

摘　　要：基于完全耦合理论和Pastor-Zienkiewicz-Chan(PZC)弹塑性模型,采用三维弹塑性动力有限元程序DYNE3WAC对涉水边坡的地震动力响应进行非线性时程动力分析。该分析方法考虑三维涉水边坡的水土耦合作用,因此能够更加准确的描述涉水边坡的地震加速度响应、超静孔压和竖向永久变形等。计算结果表明加速度在涉水边坡先稍微减弱而后逐渐增大,呈现出鞭梢效应,超静孔隙水压力随地震动波动变化并逐渐累积,竖向永久位移的最大值发生在坡顶处,均满足一般规律。通过对时间水位竖向永久变形的三维曲面分析可知,随着水位的增加,涉水边坡在地震作用下的沉降值不断增加,坡顶的大变形极易引起边坡失稳,因此抗震设计时须对此处引起重视。Based on the fully couple theory and the Pastor-Zienkiewicz-Chan（ PZC） elasto-plastic model,the seismic dynamic response of the hydrous slope is carried out by using the three-dimensional elastoplastic dynamic finite element program DYNE3WAC. This approach can take into account the soil and water coupling effect of the three-dimensional hydrous slope,hence it can accurately describe the seismic acceleration response,the excess pore water pressure and the vertical permanent deformation of the hydrous slope. The results show that the amplification factor of acceleration from bottom to crest first decreases,then increases and reaches the maximum value at the slope crest,showing a remarkable whiplash effect. The excess pore water pressure accumulates gradually with earthquake,and the maximum value occurs at the crest of the slope and can agree well with the general rule of slope under earthquake shaking. Through three-dimensional surface analysis of the time-water level-vertical permanent deformation,as the increase of the water level the settlement of the hydrous slope increases continuously under the earthquake and the large deformation of the slope is very easy to cause the slope instability. Therefore,more attention should payed to the seismic design of hydrous slope crest.

关 键 词：完全耦合理论 PZC弹塑性模型 DYNE3WAC程序 涉水边坡 

分 类 号：TU435[建筑科学—岩土工程]