基于应力空间的多重势面模型及其与邓肯张模型的比较.pdfVIP

25 Vol.25 Supp.2 2004 11 Rock and Soil Mechanics Nov. 2004 2004) 000706 1 1 2 1 1 100084 2 510610 -E- -E- O 39 A Multi-potential surface model in stress space and its comparison with Duncan-Chang’s model 1 1 2 JIE Yu-xin , LIU Zheng , YANG Guang-hua , LI Guang-xin ( 1 Department of Hydraulic Engineering, Tsinghua University, Beijing 100084,China 2 Guangdong Provincial Research Institute of Water Conservancy and Hydropower, Guangzhou 510610,China ) Abstract: The model based on multi-potential surface theory is created directly by mathematical methods and it needs no plastic potential functions or yield functions. This model gives a new approach in study of soil constitutive relation. The multi-potential surface model in stress space is put forward, and the stress-strain behavior of an element under different loading conditions are simulated based on both the multi-potential surface model and Duncan-Chang’s E-µ model with the same parameters. The calculation and the analysis concerned in this paper may be beneficial for the further studying on the multi-potential surface model. Key words: constitutive relation, multi-potential surface model, Duncan-Chang’s E-µ model 1 p A p +B q ⎫ dε d d v ⎬