基于COMSOL平台的水工混凝土冻融损伤模型试验验证与应用  

Validation and application of hydraulic concrete freeze-thaw damage model test based on COMSOL platform

作　　者：郭常凯 王磊[1] 章青[1] GUO Changkai;WANG Lei;ZHANG Qing(School of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100

出　　处：《混凝土》2023年第2期40-48,共9页Concrete

基　　金：国家自然科学基金(11932006)。

摘　　要：由于MAZARS本构模型能够很好地模拟混凝土的非线性力学行为,而以多物理场耦合能力著称的有限元软件Comsol Multiphysics平台不能很好地模拟混凝土的非线性力学行为。为此,通过Comsol Multiphysics提供的外部材料函数,在此给出了MAZARS本构模型数值实现流程,进而通过编制C语言程序对Comsol Multiphysics进行了二次开发。以此为基础,模拟了水工混凝土在单轴压缩下的破坏过程,与试验结果进行了比较分析,验证了所开发程序的正确性,并进一步分析了中心低温、降温速率和抗冻设计等级对水工混凝土抗冻融能力的影响。Because the MAZARS constitutive model can simulate the nonlinear mechanical behavior of concrete commendably,the finite element software Comsol Multiphysics platform,which is known for its multi-physics coupling ability,can′t simulate the nonlinear mechanical behavior of concrete commendably.For this reason,through the external material function provided by Comsol Multiphysics,it gives the numerical realization process of the MAZARS constitutive model,and further develops Comsol Multiphysics by compiling a C language program.Based on that,the failure process of hydraulic concrete under uniaxial compression is simulated,and the comparison with the test results is carried out to verify the correctness of the developed program.The effects of low temperature,cooling rate and anti-freeze design grade on the freeze-thaw resistance of hydraulic concrete were further analyzed.

关 键 词：水工混凝土 冻融损伤 有限元模拟 MAZARS本构模型 应力-应变曲线 抗冻融能力 

分 类 号：TU528.01[建筑科学—建筑技术科学]