平面应变情况下多重势面模型与邓肯-张模型的比较  

THE COMPARISON BETWEEN MULTI-POTENTIAL SURFACE MODEL AND DUNCAN-CHANG'S MODEL IN PLAIN-STRAIN CASES

作　　者：介玉新[1] 胡韬[1] 李广信[1] 杨光华[2] 

机构地区：[1]清华大学水利水电工程系,北京100084 [2]广东省水利水电科学研究所,广州510610

出　　处：《工程力学》2004年第1期148-152,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50274042)

摘　　要：多重势面理论给岩土材料的本构关系研究指出了更开阔的数学背景。由此建立的土的本构模型可以无需推求塑性势函数和屈服函数,且其所能表述的本构关系比通常的塑性位势理论更为广泛。基于应变空间的多重势面模型具有参数求取简单、程序易于实现的特点,更具有实用性。在这篇论文中,利用所开发的有限元程序NM02就平面应变情况对多重势面模型和邓肯-张m-E模型计算成果进行对比分析,其中多重势面模型参数与m-E模型参数完全相同。有关计算分析成果对进一步研究多重势面模型是很有意义的。Multi-potential surface theory is essentially a mathematic approach to the study of the constitutive relation for soils. The model based on the multi-potential surface theory may have wider adaptability than those based on conventional plastic-potential theory, and needs no plastic potential functions or yield functions. The multi-potential surface model in strain space is more practical, since its parameters are easy to be determined, and the program based on the model is easy to be developed. In this paper, the multi-potential surface model and Duncan-Chang抯 E-m model are compared in plain strain cases, in which the same parameters are assumed for the two models. The present work may be helpful for further studying of the multi-potential surface model.

关 键 词：岩土工程 本构关系 多重势面模型 邓肯·张模型 

分 类 号：TU411.3[建筑科学—岩土工程]