| 软粘土的各向异性和小应变条件下的本构模型(ASM) |
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| 引用本文： | 施建勇,赵维炳,Lee Fouk-hou,Chong Poh-ting.软粘土的各向异性和小应变条件下的本构模型(ASM)[J].岩土力学,2000,21(3):209-212. |
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| 作者姓名： | 施建勇 赵维炳 Lee Fouk-hou Chong Poh-ting |
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| 作者单位： | 1. 河海大学岩土工程研究所，南京 210098
2. 新加坡国立大学土木工程系，新加坡 119260 |
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| 基金项目： | 教育部高等学校优秀青年教师教学科研奖励计划资助。 |
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| 摘 要： | 以能量方程为基础推导出各向异性和小应变条件下弹塑性的本构方程，并将屈服面与修正桥模型和试验测得的屈服面进行了对比，表明新的屈服面比修正剑桥模型更接近试验结果，采用从初始应力到状态边界面的距离为参数的系数来修正硬化准则以模拟土体小应谱条件下的应力－应变特征。将新的本构模型编入有限元程序，对小应变试验进行了计算分析，计算结果表明，新的模型比修正剑桥模型能更好地反映土体的主要力学特性。
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| 关 键 词： | 本构模型 各向异性 小应变 软粘土 |
| 文章编号： | 1000-7598-(2000)03-0209-04 |
| 收稿时间： | 1999-11-15 |
| 修稿时间： | 1999年11月15 |
A constitutive model for anisotropic and small-strain behaviour of soft clay(ASM) |
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| Lee Fouk-hou,Chong Poh-ting.A constitutive model for anisotropic and small-strain behaviour of soft clay(ASM)[J].Rock and Soil Mechanics,2000,21(3):209-212. |
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| Authors: | Lee Fouk-hou Chong Poh-ting |
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| Institution: | 1.Hohai University , Research Institute of Geotechnical Engineering, Nanjing 210098 , China) ( 2 . Department of Civil Engineering , National University of Singapore, 119260 , Singapore |
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| Abstract: | In this paper a yield surface of anisotropic and small strain constitutive model (ASM) is presented based on energy equation and compared with yield surface of modified Cam Clay Model (MCC),yield surface from testing result. It is clear that the new yield surface is closer to testing result than MCC.A function of distance between initial stress strain point and point at state boundary surface is adopted to simulate stress strain behaviour of soil in condition of small strain.The new constitutive model is compiled into FEM program and calculation result is compared with experiment.It is shown that the model in this paper can better simulate main characteristics of soil than MCC. |
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| Keywords: | constitutive model anisotropy small strain finite element |
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