贴坡式挡墙结构特性及接触参数敏感性分析
发布时间：2019-01-09 09:37
【摘要】：为揭示贴坡式挡墙墙后土体与挡墙间接触参数对挡墙土压力及位移分布的影响,基于有限元非线性接触分析,对接触单元法向刚度、切向刚度以及摩擦系数敏感性进行研究。结果表明,接触单元参数变化对土压力的分布没有显著影响,但对挡墙位移影响较大;其中法向刚度和切向刚度是影响挡墙位移的主要因素;当法向刚度取值在挡墙和土体变形模量之间,切向刚度取值比法向刚度小0~3个量级时,计算结果较为合理可信。
[Abstract]:In order to reveal the influence of contact parameters between soil and retaining wall on the distribution of earth pressure and displacement of retaining wall, the normal stiffness, tangential stiffness and sensitivity of friction coefficient of contact element were studied based on the nonlinear contact analysis of finite element method. The results show that the change of contact element parameters has no significant effect on the distribution of earth pressure, but has a great effect on the displacement of the retaining wall, among which the normal stiffness and tangential stiffness are the main factors affecting the displacement of the retaining wall. When the normal stiffness is between the retaining wall and the soil deformation modulus, and the tangential stiffness is 0 ~ 3 orders of magnitude less than the normal stiffness, the calculated results are reasonable and reliable.
【作者单位】： 四川大学水力学与山区河流开发保护国家重点实验室;
【基金】：国家重点基础研究发展“973”计划项目(2015CB057903) 国家自然科学基金项目(51079092)
【分类号】：TU476.4
[Abstract]:In order to reveal the influence of contact parameters between soil and retaining wall on the distribution of earth pressure and displacement of retaining wall, the normal stiffness, tangential stiffness and sensitivity of friction coefficient of contact element were studied based on the nonlinear contact analysis of finite element method. The results show that the change of contact element parameters has no significant effect on the distribution of earth pressure, but has a great effect on the displacement of the retaining wall, among which the normal stiffness and tangential stiffness are the main factors affecting the displacement of the retaining wall. When the normal stiffness is between the retaining wall and the soil deformation modulus, and the tangential stiffness is 0 ~ 3 orders of magnitude less than the normal stiffness, the calculated results are reasonable and reliable.
【作者单位】： 四川大学水力学与山区河流开发保护国家重点实验室;
【基金】：国家重点基础研究发展“973”计划项目(2015CB057903) 国家自然科学基金项目(51079092)
【分类号】：TU476.4
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