A MODIFIED SUPER-SUBLOADING SURFACE MODEL BASED ON ENERGY DISSIPATION FOR BOOM CLAY AND ITS NUMERICAL IMPLEMENTATION
GONG Zhe1，CHEN Weizhong1，2，YU Hongdan1，MA Yongshang1，YUAN Kekuo3，LI Xiangling4
(1. Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；
2. Geotechnical and Structural Engineering Research Center，Shandong University，Jinan，Shandong 250061，China；
3. Xi'an Research Institute of China Coal Technology & Engineering Group Corp，Xi?an，Shanxi 710077，China；
4. Euridice，SCK•CEN，Belgian Nuclear Research Centre，Mol 2400，Belgium)
Abstract：Due to the limitation of Modified Cam-clay model，which can?t depict overconsolidated or structured clay，the concept of super-subloading surface was introduced to describe the destruction of Boom clay. According to the characterization of yield surface of Boom clay，the super-subloading surface model was modified based on energe dissipation. Adopting the closest point projection method(CPPM)，the UMAT subroutine of the developed model is implemented in FEM code ABAQUS. With the developed model and Modified Cam-clay model，numerical simulations of undrained triaxial compression tests on Boom clay under different confining pressure was performed. The simulated results with two different models were compared with the test results. It was shown that the developed model can depict the destruction process of Boom clay during shearing and the peak strength of overconsolidated clay was decreased compared with conventional super-sub loading surface model.
龚 哲1，陈卫忠1，2，于洪丹1，马永尚1，袁克阔3，李香玲4. 基于能量耗散修正的Boom clay上下加载面模型及其数值实施[J]. 岩石力学与工程学报, 2015, 34(06): 16-16.
GONG Zhe1，CHEN Weizhong1，2，YU Hongdan1，MA Yongshang1，YUAN Kekuo3，LI Xiangling4. A MODIFIED SUPER-SUBLOADING SURFACE MODEL BASED ON ENERGY DISSIPATION FOR BOOM CLAY AND ITS NUMERICAL IMPLEMENTATION. , 2015, 34(06): 16-16.
2015, Vol. 34 
