摘要
根据ABAQUS计算原理,指出广泛使用的混凝土损伤塑性模型(CDP)模型中,当混凝土本构曲线输入过长会导致在复合受扭下出现混凝土承载力远低于试验值的错误结果。为消除CDP模型缺陷,提出通过在适当位置截断本构曲线以缓解混凝土强度过快下降的思路,并分析了不同截断长度对复合受扭型钢混凝土柱受力性能的影响。结果表明,在0.5ft,r处截断能够较好地拟合实际受力性能。最后为验证普适性,建立模型对6根不同工况的型钢混凝土柱进行数值模拟。结果表明,3根单调加载试件模拟与试验结果误差在4%以内,3根低周反复加载试件模拟误差在15%以内(考虑偶然误差),排除偶然误差后可小于6%,且能模拟出较好的捏缩特性。
Based on the calculation principle of ABAQUS,point out that there exists a flaw in the widely-utilized concrete damaged plasticity model(CDP),which will lead to abnormally low load capacity while inputting longer constitutive curve for steel-reinforced concrete column under combined torsion.In order to address the issue,thought that truncating constitutive curve at proper position which prevents concrete from softening too rapidly was proposed.Research on the impact of variable truncation position on the performance of steel-reinforced concrete column was conducted.The result show that truncation at 0.5ft,r can better fit the actual mechanical performance.Finally,perform numerical simulation on 6 steel-reinforced concrete columns with different loads were built to verify universality.The result show that 3 models with monotonic load limit the deviation with experiment below 4%,3 models with cyclic load limit the deviation below 15%(with accidental error)and 6%(without accidental error),the hysteretic curve shrinks to a certain degree.
作者
盛炜仲
邵永健
李国建
SHENG Weizhong;SHAO Yongjian;LI Guojian(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;Zhongyifeng Construction Group Co.,Ltd.,Suzhou 215131,China)
出处
《建筑结构》
北大核心
2023年第16期44-50,共7页
Building Structure
基金
2019年江苏省研究生科研创新计划项目(KYCX19_2027)
江苏省研究生工作站(中亿丰建设集团股份有限公司)(2010_060)。
关键词
型钢混凝土
混凝土损伤塑性模型
复合受扭
建模方法
本构曲线截断
steel-reinforced concrete
concrete damage plasticity model
combined torsion
modeling method
constitutive curve truncation
