基于夹杂体本构理论的混凝土渠道冻胀模拟  

Frost Heave Simulation of Concrete Canals Based on Inclusion Constitutive Theory

作　　者：陈立杰[1] 王正中[2] 蔡雪雁[1] 

机构地区：[1]中国农业科学院农产品加工研究所后勤基建中心,北京100193 [2]西北农林科技大学水工程安全与病害防治研究中心,陕西杨凌712100

出　　处：《路基工程》2011年第5期7-10,共4页Subgrade Engineering

基　　金：国家"863"计划(2002AA62Z3191);国家冻土工程重点试验室基金项目(9901)

摘　　要：研究独立参数少且能够满足生产实际的冻土本构模型,对科学指导寒区混凝土衬砌渠道的建设非常必要。在冻土属横观各向同性材料的基础上,基于复合材料夹杂理论提出一种新型冻土本构模型,将冻土分别视为各向同性、横观各向同性线弹性材料,把渠基冻土和渠道衬砌作为一个整体结构,应用有限元通用软件ADINA,对甘肃靖会梯形混凝土衬砌渠道冻胀进行热应力耦合数值模拟,计算渠道冻胀的温度场、应力场和变形场,研究衬砌板冻胀受力和变形规律,并对结果进行对比分析。结果表明,该模型能较好地反映梯形混凝土衬砌渠道的冻胀机理和冻胀温度场、应力场及变形场的基本规律,与实测成果吻合较好。It is essential to study frozen soil constitutive theory with few independent parameters and able to meet actual production to scientifically guide the construction of concrete-lined canal in cold areas.As frozen soil belongs to transverse isotropic material,a new frozen soil constitutive model is put forward based on inclusion theory of composite material,which regards frozen soil as isotropic,transverse isotropic linear elastic material respectively,and regards the base frozen soil and canal lining as a whole.Thus,the frost heave of Gansu Jinghui trapezoidal concrete-lined canal is numerically simulated by thermal-stress coupling using common finite element software ADINA to calculate the temperature field,stress field and deformation field of heaving and analyze heave force and deformation relationship of lining plate.Through comparison of the results,it is shown that this model can better reflect the frost heave mechanism of trapezoidal concrete-lined canal and the basic law of temperature field,stress field and deformation field,which are basically consistent with the measured results.

关 键 词：冻土 夹杂理论 横观各向同性材料 衬砌渠道 冻胀数值模拟 

分 类 号：U416.168[交通运输工程—道路与铁道工程]