辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(7)：724-728,5.DOI:10.11956/j.issn.1008-0562.2017.06.010
基于PL-Finn模型的饱和砂土液化数值分析
Numerical analysis of saturated sand liquefaction based on PL-Finn model
摘要
Abstract
In order to study soil liquefaction characteristics of caisson wharf on seismic load condition,based on PL-Finn model containing dynamic pore pressure increase,this paper combined with the field measurement and large finite difference software FLAC3D,and analyzed pore pressure ratio of the replaced sand and land sand by means of the fully nonlinear dynamic analysis method,simultaneously in consideration of coupling effect of seismic load and seepage,and the measured results and the finite difference simulation results are comparatively analyzed.Results show that the terminal peak residual displacement of wharf is 3.47 m and that the maximum residual subsidence is 1.86 m;liquefaction of land sand have taken place 6～9 seconds after the seismic load is applied and super pore pressure ratio is close to 1;liquefaction of few sandy soil occurs and the residual super pore pressure ratio is around 0.25～0.30;The difference between settlement of in-situ test and that of simulation calculation is about 7％,which contributes to drawing a conclusion that the result of finite difference method is basically equivalent to the in-situ data and that finite difference software FLAC3D can be a good simulation of sand liquefaction process.关键词
沉箱式码头/动载荷/饱和砂土液化/PL-Finn本构模型/超孔压比Key words
caisson wharf/seismic load/saturated sand liquefaction/PL-Finn constitutive model/super pore pressure ratio分类
天文与地球科学引用本文复制引用
张向东,张晋,苏伟林..基于PL-Finn模型的饱和砂土液化数值分析[J].辽宁工程技术大学学报（自然科学版）,2017,36(7):724-728,5.基金项目
高等学校博士学科点专项科研基金联合项目(20112121110004) （20112121110004）
