摘要
皖江区域是我国经济发展迅速、基础设施全面推进的中部区域。在基础建设中寻求简捷而贴近实际的计算方法成为设计计算关键环节。邓肯-张双曲线本构模型能较好反映土体非线性特征,概念清晰,易于理解,在工程界中得到了广泛应用。文中选取皖江区域马鞍山段典型砂土层取样试验,分析土体抗剪强度和变形特征,率定邓肯-张模型计算参数。在编制邓肯-张双曲线非线性土体本构模型有限元计算程序基础上,开展砂样土体自重应力平衡、等压固结和轴向应变剪切破坏过程有限元数值计算验证。结果表明:邓肯-张模型参数正确,可为采用有限单元法分析皖江区域砂土地基沉降及稳定性提供依据。
The infrastructure construction is progressing comprehensively owing to economic prosperity in Ma'anshan district of Wanjiang area.The seeking of calculation methods close to engineering practices with simple parameters has become key links in design.The Duncan-Chang constitutive model is widely used in engineering on account of its clear concept and simple calculation procedure.The samples in typical sand layers are selected in Ma’anshan district of Wanjiang area.The shear strength and deformation characteristics of the sand are studied.The calculation parameters of Duncan-Chang model are offered through laboratory test.The finite element program of Duncan-Chang constitutive model is developed.Numerical calculation of the sand is carried out for three stages of self-weight stress equilibrium,isostatic consolidation and axial strain shear failure based on Duncan-Chang model.Researches show that:the parameters of Duncan-Chang model are correct,and it can be used to analyze the settlement and stability of sand foundation inWanjiang Area by finite element method.
作者
司海宝
殷俊
李会
SI Haibao;YIN Jun;LI Hui(School of Civil Engineering and Architecture,Anhui University of Technology,Ma’anshan 243032,China;Housing Management service Center of Huashan District,Ma’anshan 243032,China;Nanjing Hydraulic Research Institute,Nanjing 210024,China)
出处
《安徽工业大学学报（自然科学版）》
CAS
2019年第2期159-164,共6页
Journal of Anhui University of Technology（Natural Science）
基金
土石坝破坏机理与防控技术重点实验室开放基金(YK9150020)
安徽省教育厅重点基金项目(KJ2014A030)
关键词
皖江区域砂土
邓肯-张模型
三轴试验
数值计算
Wanjiang Area sand
Duncan-Chang model
triaxial test
numerical calculation
