基于不同客观本构关系的路基大变形固结分析 Large strain consolidation of roadbed based on various obj

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基于不同客观本构关系的路基大变形固结分析

Large strain consolidation of roadbed based on various objective constitutive relations

针对路基大变形固结分析中常用的Jaumann率型本构关系不能考虑邻域变形之影响的缺点,将Truesdell率型本构关系引入到大变形固结理论.采用虚功原理和Galerkin加权残值法,推导了基于不同客观本构关系的大变形固结有限元方程.编制相应的平面应变有限元程序对路基大变形固结性状进行分析,主要讨论了Truesdell率型、Jaumann率型、简化Jaumann率型等3种大变形本构关系对路基固结性状的影响.算例分析结果表明:基于常用的Jaumann率型本构关系的大变形固结分析得到的路基沉降量、侧向位移和孔压等均偏大于基于Truesdell率型本构关系时的相应结果.小变形本构矩阵不能反映客观性要求,将导致计算结果产生较大偏差.对常见问题而言,Jaumann率型和Truesdell率型本构关系对计算结果的影响并不很大,传统分析方法在变形较小时仍具有较高精度.

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作 者: 丁洲祥 龚晓南 谢永利 李韬 DING Zhou-xiang GONG Xiao-nan XIE Yong-li LI Tao  
作者单位:丁洲祥,DING Zhou-xiang(同济大学,地下建筑与工程系,上海,200092)
o]}YrulS7F#Bu0龚晓南,GONG Xiao-nan(浙江大学,岩土工程研究所,杭州,310027)水利论文KmAD t-m&i
谢永利,XIE Yong-li(长安大学,公路学院,西安,710064)水利论文;x+F)t+S:k7ry&n
李韬,LI Tao(上海市岩土工程勘察设计研究院,上海,200002) 
刊 名:岩土力学  ISTIC EI PKU
英文刊名:ROCK AND SOIL MECHANICS 
年,卷(期):2006 27(9) 
分类号:TU433 
关键词:路基工程   大变形固结   有限元法   本构关系   客观性原理  
机标关键词:本构关系路基沉降量大变形固结固结分析固结性状变形固结理论有限元方程有限元程序加权残值法虚功原理算例分析平面应变计算分析方法侧向位移本构矩阵客观性高精度大偏差推导 
基金项目:国家自然科学基金 
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