长期荷载作用下加筋土挡墙筋材分段数值模拟方法  

Segmented numerical simulation method of reinforced soil retaining wall under long-term load

作　　者：吴旭晨 熊勇军 肖豪 汪磊 WU Xuchen;XIONG Yongjun;XIAO Hao;WANG Lei(School of Civil Engineering and Surveying&Mapping Engineering(Nanchang),Jiangxi University of Science and Technology,Nanchang 330013,China;Jiangxi Jiangzi Engineering Consulting Co.Ltd.,Nanchang 330046,China;Hunan Institute of Geological Exploration,General Administration of Geology and Mines,SINOCHEM,Changsha 410083,China;Hunan Chemical Geological Engineering Survey Institute Co.Ltd.,Changsha 410004,China)

机构地区：[1]江西理工大学土木与测绘工程学院(南昌),江西南昌330013 [2]江西省江咨工程咨询有限公司,江西南昌330046 [3]中化地质矿山总局湖南地质勘查院,湖南长沙410083 [4]湖南化工地质工程勘察院有限责任公司,湖南长沙410004

出　　处：《贵州科学》2024年第6期86-90,共5页Guizhou Science

基　　金：江西省教育厅科学技术研究项目(GJJ200865);高层次人才科研启动项目(jxncbs19002)。

摘　　要：土工合成材料的长期刚度受到加载时间、应力应变关系等因素的影响。本文基于YU的蠕变试验所获得的长期刚度表达式与筋材应力应变相互迭代,模拟加筋土挡墙中筋材在长期荷载作用下的力学行为变化,从而得到一套可以较好地预测加筋土挡墙长期工作性能变化的模拟方法。并运用有限元模拟进行实际迭代计算,通过与不分段模型数据相对比,不分段的筋材都赋予该层最大的应变,比实际应变偏大,导致筋材所分得的内力偏小,所以筋材分段更加贴合实际工作状态。相关成果为以后的模拟长期荷载作用的加筋土挡墙提供了借鉴。The long-term rigidity of geosynthetics is affected by factors such as loading time and stress-strain relationship.In this paper,the long-term rigidity expression obtained based on creep test is iterated with the stress and strain of the reinforcement to simulate the mechanical behavior change of the reinforcement in reinforced soil retaining wall under long-term load,so as to obtain a set of simulation method that can better predict the long-term working performance change of the reinforced soil retaining wall.The finite element simulation is used to carry out the actual iterative calculation.By comparing with the non-segmented model data,it is concluded that reinforcement segmentation is more in line with the actual working state.The relevant results have provided reference for future simulation of the reinforced soil retaining wall under long-term load.

关 键 词：加筋土挡墙 长期刚度 迭代计算 筋材拉力 模拟方法 

分 类 号：TU41[建筑科学—岩土工程]