摘要
基于OpenSees平台,分别采用Hognestad、Rüsch、Kent-park三种混凝土受压本构模型,对已有钢筋混凝土试验柱进行了低周反复加载模拟,分析了不同混凝土本构模型的模拟效果。在此基础上,进行了不同轴压比下混凝土模型对柱受力性能影响的数值分析。结果表明,各本构模型的模拟结果均能较为真实地反映混凝土柱实际承载力和延性规律;混凝土模型对柱正截面承载力的影响不大,而对延性的影响在轴压比较大(n≥0.3)时显著。
With finite element analysis program (OpenSees), low reversed cyclic loading was simulated on the tested RC column with different constitutive models including Hognestad, Rlisch and Kent-park. And simulation results were studied. In addition, the effect of constitutive model on mechanical behavior of columns under different axial load ratios was analyzed numerically. It is found that simulation results of the 3 different constitutive models can truly reflect bending capacity and ductility of real RC columns. Results also show that concrete model has little effect on normal section bending capacity of RC columns but significant impact on ductility, especially under a high axial load ratio (n ≥0. 3 ).
出处
《四川建筑科学研究》
北大核心
2015年第1期21-25,共5页
Sichuan Building Science
关键词
数值模拟
混凝土本构模型
低周反复加载
numerical simulation
concrete constitutive model
low reversed cyclic loading