钢管约束下轻集料混凝土本构模型  

Study on constitutive model of lightweight aggregate concrete under steel tube confinement

作　　者：吴东阳 傅中秋[1] 吉伯海[1] 王占飞 WU Dongyang;FU Zhongqiu;JI Bohai;WANG Zhanfei(College of Civil & Transportation Engineering,Hohai University,Nanjing 210098,China;School of Transportation Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]河海大学土木与交通学院,南京210098 [2]沈阳建筑大学交通工程学院,沈阳110168

出　　处：《扬州大学学报（自然科学版）》2019年第1期67-73,共7页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金青年基金资助项目(51208176)

摘　　要：通过对比分析5种常用核心混凝土本构模型的特征和适用性,探讨了钢管混凝土本构模型在钢管高强、普通和轻集料混凝土中的适用性.采用不同本构模型计算钢管混凝土构件的轴压,得到构件承载力和应力-应变曲线,通过与试验数据的对比,对现有模型进行了修正,并提出针对钢管轻集料混凝土的本构模型.结果表明:采用塑性损伤模型计算的曲线更符合试验曲线的发展趋势,本文模型在钢管轻集料混凝土有限元分析中有较好的适用性.The applicability of the concrete filled steel tube constitutive model in the high strength,common and light aggregate concrete of steel tube is studied.The characteristics and applicability of five common core concrete constitutive models are compared and analyzed.By establishing finite element model,different constitutive models are used to calculate the axial compression of CFST members.The calculated load capacity and loadstrain curves are compared with the existing experimental data for analysis of its precision.On this basis,the existing models are modified,and a constitutive model for lightweight aggregate concrete filled steel tubes is proposed.The comparison results show that the curve calculated by the plastic damage model is more consistent with the development trend of the test curve.The proposed model has good applicability in the finite element analysis of lightweight aggregate concrete filled steel tube.

关 键 词：轻集料混凝土 钢管约束 塑性损伤模型 本构模型 

分 类 号：TU398.5[建筑科学—结构工程]