摘要
为讨论PLAXIS和OPTUM在加筋路堤模拟技术上的差异,并探究路堤填筑过程中关键力学响应的动态演变规律,提出2款程序中界面参数的等效转换方式,并基于2款程序分别建立了加筋路堤数值分析模型。结果表明,2款程序的Geogrid单元类型及节点数不同,PLAXIS拥有更丰富的筋材本构模型,而OPTUM在考虑拉伸截断时则更为全面;PLAXIS所获轴向拉力略小于OPTUM,2款程序计算所获界面剪切应力差值在最大剪应力附近位置相较其他位置更大,OPTUM中危险滑动面更靠深处;随路堤填筑,筋材轴向拉力整体作用逐渐发挥,而筋土界面抗剪作用则主要发挥在靠近坡脚一侧。
In order to discuss the differences between PLAXIS and OPTUM in the reinforced embankment simulation,and explore the dynamic evolution law of the critical mechanical responses during embankment filling,an equivalent conversion method of interface parameters for both programs was proposed,and numerical analysis models of reinforced embankment were established using two programs respectively.The results show that the geogrid element types and node numbers of the two programs are different.PLAXIS has more constitutive models of reinforcement,while OPTUM is more comprehensive when considering tension cut-off.The axial tension calculated by PLAXIS is slightly smaller than that of OPTUM.The difference of interfacial shear stress calculated by two programs is larger near the maximum shear stress location than that at other positions,and the dangerous sliding surface in OPTUM is deeper.With the embankment filling,the overall effect of reinforcement axial tension gradually comes into play,while the shear resistance of the reinforcement-soil interface is mainly concentrated on the side near the foot of the slope.
作者
左建忠
蒋鑫
付用国
陈欣妮
黄岑嶷
邱延峻
ZUO Jianzhong;JIANG Xin;FU Yongguo;CHEN Xinni;HUANG Cenyi;QIU Yanjun(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, China;MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处
《交通科技》
2022年第1期5-10,共6页
Transportation Science & Technology
基金
西南交通大学重点实验室向本科生开放工程实践项目(ZD2021010006)资助。
