摘要
基于ABAQUS软件平台,开发了适用于钢筋混凝土框架节点火灾反应分析的梁单元用户材料模型及子程序。首先,以梁单元截面积分点编号为依据,输入各积分点的温度—时间曲线;然后,利用塑性增量理论,考虑混凝土材料的受拉断裂和受压软化,建立了可用于框架节点火灾反应分析的混凝土材料模型,并且编制了用户子程序UMAT。用该方法对恒定加载与火灾升温耦合作用下的钢筋混凝土框架节点进行了全过程分析,分析结果与试验结果吻合较好,表明该方法是合理可行的。
Based on ABAQUS software, a user material model and subroutine for reinforced concrete frame joints in fire are presented in this paper. On the basis of the integration points of beam sections, the temperature-time relationship of the integration points are first input from outer result files, and then, based on incremental plastic theory, a concrete material model which includes the cracking under tension and softening under compression is presented and the user material subroutine （UMAT） is compiled. The comparison between the calculated results and the test results of reinforced concrete frame joints models shows that the presented method in this paper is reasonable.
出处
《山东建筑大学学报》
2009年第6期495-499,521,共6页
Journal of Shandong Jianzhu University
基金
国家自然科学基金项目(50678097)
山东省自然科学基金项目(Y2006F30)
关键词
钢筋混凝土框架节点
用户材料子程序
塑性增量理论
火灾
reinforced concrete frame joints
user material subroutine
incremental plastic theory
fire
