【摘要】 有限元分析软件Open Sees对钢筋混凝土结构非线性反应的模拟具有良好的精度。基于此,本文采用Open Sees,选取PEER数据库中由Kunnath等完成的钢筋混凝土试件的拟静力试验进行数值模拟,并对数值模拟过程中积分点数和纵筋低周疲劳效应的影响进行了讨论分析。结果表明:不同的积分点数、是否考虑纵筋的低周疲劳效应对模拟结果有显著的影响;对于较小位移幅值加载的试件,采用5个积分点,不考虑纵筋低周疲劳效应的模拟结果较好;对于较大位移幅值加载的试件,采用3个积分点,考虑纵筋低周疲劳效应的模拟结果较好。更多还原

【Abstract】 The finite element analysis software,namely Open Sees can simulate the nonlinear responses of reinforced concrete structures accurately. In the paper,the pseudo static tests for reinforced concrete specimens conducted by Kunnath et al in the PEER database is simulated with Open Sees. Then the influence of the number of integration point and the effect of low cycle fatigue of longitudinal reinforcement is discussed. The results Indicate that different integration points and the low cycle fatigue effect of longitudinal reinforcement has a significant influence on the simulation results. For the specimen with smaller displacement amplitude,there is a good simulation results with five integration points and without regard to the low cycle fatigue effect of longitudinal reinforcement. For the specimen with larger displacement amplitude,the results with three integration points and considering the low cycle fatigue effect are acceptable.更多还原