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基于刚度退化和滞回耗能的圆钢管混凝土柱损伤模型

Stiffness degradation and hysteretic energy dissipation based damage model of concrete-filled circular steel tube columns

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【作者】 吴轶黄照棉Vincent W.Lee杨春张春梅蔡北海

【Author】 WU Yi;HUANG Zhaomian;Vincent W.Lee;YANG Chun;ZHANG Chunmei;CAI Beihai;Guangzhou University;CAPOL.;University of Southern California;South China University of Technology;State Key Laboratory of Subtropical Building Science,South China University of Technology;

【机构】 广州大学华阳国际工程设计有限公司University of Southern California华南理工大学华南理工大学亚热带建筑科学国家重点实验室

【摘要】 由于现有的钢管混凝土柱损伤模型中存在损伤计算不收敛、缺乏对构件不同性能水平量化分析等问题,本文结合64个圆钢管混凝土试件,以试件钢管破坏现象、承载力变化和侧移等指标,建立了钢管混凝土柱试件损坏程度、破坏现象与损伤指数对应关系,并提出基于刚度退化与滞回耗能指标的S-E双参数损伤模型(S与E分别为stiffness和energy的缩写),最后通过低周反复试验试件、低周疲劳试验试件以及一榀框架结构试验试件验证了S—E损伤模型的合理性。结果表明,本文提出的损伤模型计算曲线与试件实际损伤曲线吻合良好,能合理评估构件不同阶段的损坏程度,为进一步研究地震作用下钢管混凝土柱的损伤评估提供参考。

【Abstract】 As the calculation of concrete-filled circular steel tube( CFST) damage models can’t match the real damage states and there is no performance levels for CFST members,in the paper experimental data of 64 CFST columns were extensively studied,and the relationship between the damage conditions of the CFST columns and the damage indexes was built by considering the failure of the steel-tube,bearing capacity and lateral drift of the columns,then a new damage model,S-E damage model,which was based on stiffness degradation and hysteretic energy dissipation,was proposed. Finally,the new S-E damage model was verified by experiments of some low cyclic,low-cycle fatigue specimens and a CFST frame structure. Results show that the damage index curve calculated by using the S-E damage model was in good agreement with the practical damage curve of the specimens,and the damage conditions corresponding to different stages could be assessed reasonably,which provided references for the further study of damage assessment of CFST columns under seismic excitations.

【基金】 国家自然科学基金青年科学基金项目(51108104);广东省自然科学基金项目(S2012010010074);市属高校“羊城学者”(12A001D)科研项目;省科技计划(2013B020200016)科研项目;国家留学基金委资助
  • 【文献出处】 地震工程与工程振动 ,Earthquake Engineering and Engineering Dynamics , 编辑部邮箱 ,2014年05期
  • 【分类号】TU398.9
  • 【被引频次】5
  • 【下载频次】281
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