摘要
土的弹塑性本构模型分别采用扩展Drucker-Prager模型和Mohr-Coulomb模型,桩-土接触面采用主从接触面模型,利用ABAQUS软件,对两根大直径桩的静载荷试桩结果进行了三维有限元数值模拟,结果表明:当土的内摩擦角Φ≤22°时,采用扩展Drucker-Prager模型较Mohr-Coulomb模型更好地模拟出大直径单桩竖向荷载作用下的荷载-沉降关系曲线;但当Φ>22°时,Mohr-Coulomb模型也能很好地模拟出大直径单桩的荷载-沉降关系曲线。
In this paper, the extended Drucker- Prager model and Mohr-Coulomb model have been adopted as the elasto-plastic constitutive models of the soil and the master-slave contact surface model for the pile - soil contact surface. Using the ABAQUS software, the static load testing results of two large diameter piles have been simulated by the three - dimensional finite element numerical method. The results show that for simulating the load-settlement curves of the large diameter pile foundation the extended Drucker - Prager constitutive model is better than Mohr - Coulomb model under the vertical load, when the friction angle of soil is less than or equal to 22 degree ; And the Mohr - Coulomb model has also good simulation result, when the friction angle is larger than 22 degree.
出处
《地下空间与工程学报》
CSCD
2007年第2期306-310,共5页
Chinese Journal of Underground Space and Engineering
基金
国家教育部青年骨干教师基金(2000)
南京工业大学重点学科建设基金(2003)
