钢管混凝土柱破坏过程的三维数值模拟  

3D-Numerical Simulation on Failure Process of Concrete-Filled Steel Tube Column

作　　者：凌丽[1] 唐春安[2] 王述红[1] 梁正召[2] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《东北大学学报（自然科学版）》2008年第10期1505-1508,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(40638040)

摘　　要：用材料破坏过程分析系统RFPA3D(realistic failure process analysis)对矩形钢管混凝土短柱在轴心受压条件下的受力、变形与内部裂缝萌生、扩展及最终破坏的全过程进行了数值模拟分析.数值模型中引入了统计分布函数,反映了混凝土的非均匀性影响,采用细观单元材料性质退化的方法,利用位移加载来实现钢管混凝土的逐渐破坏过程.讨论了极限承载力与钢管混凝土柱长度的关系及钢管混凝土截面面积对极限承载力的影响等问题.数值试验再现了试件的整个破坏过程.分析结果表明RFPA3D数值实验方法为钢管混凝土结构的研究提供了新的方法和途径.The RFPA^3D（realistic failure process analysis） code is used to simulate the concretefilled short rectangular steel tube columns. The whole process including loading, deformation, failure and crack initiation/propagation of the short column is numerically simulated. A certain statistical function is introduced into the numerical model to reflect the concrete heterogeneity. The elastic modulus and other mechanical properties are all weakened when the stress in elements satisfies the failure criterion. The progressive failure process of the column is brought to pass by way of increasing load to induce further displacement. The relationship between the ultimate load- carrying capacity and length of the steel tube are given with the change of cross-section area of concrete taken into account. The whole failure process of those samples is thus reproduced through RFPA3D numerical evaluation. The results indicated that RFPA3D can provide a new way to study the concrete-filled steel tube.

关 键 词：钢管混凝土 轴心受压构件 承载力 破坏过程 非均匀性 

分 类 号：TU398.9[建筑科学—结构工程]