重复荷载作用下碳纤维约束混凝土加卸载准则  

Loading and unloading criteria of FRP-confined concrete under cyclic compression

作　　者：王震宇[1] 李洪鹏 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]中国建筑北京设计研究院建筑事业部,北京100037

出　　处：《建筑结构》2009年第7期100-103,70,共5页Building Structure

基　　金：国家自然科学基金项目(50408010);北京市重点实验室开放基金项目(EESR2005-3)

摘　　要：对12个碳纤维约束混凝土棱柱体试件(100×100×300)进行了重复荷载受压试验,分析了重复荷载作用下碳纤维约束混凝土加载及卸载应力-应变曲线的特征,基于试验结果的回归分析,建立了加卸载准则的数学表达式。分析预测与试验结果的比较证明了所提出的加卸载准则的准确性及适用性,为轴力和往复水平荷载作用下碳纤维约束混凝土柱的非线性分析提供了材料的滞回本构模型。A total of 12 FRP-confined concrete specimens （100×100×300） with different wrap thickness and concrete strength were tested in uniaxial compression under different levels of loading and unloading. The character of loading and unloading curves was analyzed. Based on a regression analysis of test results, the mathematic expression of cyclic rules for loading and unloading are developed. The proposed model is accurate and validated by comparing analytical predictions with experimental results and the cyclic model could be easily used in nonlinear analysis of FRP-confined concrete column subjected to axial and cyclic lateral load.

关 键 词：碳纤维 重复荷载 约束 应力-应变关系 本构模型 

分 类 号：TU375.3[建筑科学—结构工程] TU473.1