土工布加筋砂土场地抗液化数值模拟  

Numerical Simulation for Liquefaction Resistance of Sand Ground Reinforced by Geotextile

作　　者：周林禄 苏雷 凌贤长[1,2] 王龙龙 ZHOU Lin-lu;SU Lei;LING Xian-chang;WANG Long-long(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《科学技术与工程》2024年第26期11377-11384,共8页Science Technology and Engineering

基　　金：国家重点研发计划(2022YFC3080400);国家自然科学基金(42072310)。

摘　　要：以往的试验研究表明土工布加筋可以有效缓解饱和砂土的振动液化。针对饱和砂土抗液化研究,过去的研究手段往往局限于室内动三轴试验,而缺乏对土工布加筋砂土场地的抗液化研究。首先结合土工布加筋砂土抗液化动三轴试验结果,对不同的土工布加筋砂土进行了参数标定。在此基础上,利用开源有限元数值模拟平台OpenSees,对不同土工布加筋工况下的饱和砂土场地开展抗液化数值模拟研究。结果表明,土工布加筋能够降低砂土场地的超孔压和位移,砂土场地的抗液化性能随着土工布层数的增加而提升。这种通过参数标定法来实现土工布加筋砂土数值建模的技术,可为类似加筋土层的数值模拟提供一些有价值的参考与借鉴。Previous experimental studies show that geotextile reinforcement can effectively mitigate the liquefaction of saturated sand under earthquake.In view of the research on liquefaction resistance of saturated sand,the previous research methods were often limited to indoor dynamic triaxial tests and lacked the research on liquefaction resistance of geotextile reinforced sand ground.Firstly,the parameter calibration of different geotextile reinforced sand was carried out combined with the results of corresponding cyclic triaxial test of liquefaction resistance.On this basis,using OpenSees,an open-source finite element numerical simulation platform,numerical research on liquefaction resistance of saturated sand ground under different geotextile reinforcement cases was carried out.The results show that geotextile reinforcement can reduce the excess pore pressure and displacement of sand ground,and the liquefaction resistance of sand ground increases with the increase of geotextile layers.This technique of realizing numerical modeling of geotextile reinforced sand by parameter calibration method can provide some valuable reference for numerical simulation of similar reinforced soil stratum.

关 键 词：土工布加筋 砂土场地 抗液化 参数标定 有限元模拟 

分 类 号：TU435[建筑科学—岩土工程]