钢筋混凝土柱Park-Ang损伤模型的尺寸效应修正*
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（1 北京工业大学城市与工程安全减灾教育部重点实验室，北京 100124；2 石家庄经济学院勘查技术与工程学院，石家庄 050031）
［摘要］通过18个不同截面尺寸的钢筋混凝土柱的单调和低周反复加载试验，发现基于Park-Ang损伤模型得到的损伤指标随截面尺寸的增大而降低，存在尺寸效应；构件损伤越严重，尺寸效应越明显，且位移项与能量项所表现的尺寸效应也不相同。在试验研究的基础上，提出了考虑截面尺寸影响系数的ParkAng损伤模型修正公式。结果表明，Park-Ang损伤模型的尺寸效应修正公式能够改善预测结果与试验结果的符合程度。［关键词］钢筋混凝土柱; 损伤模型; 位移; 耗能; 尺寸效应中图分类号：TU375.3 文献标识码：A 文章编号：1002-848X(2015)12-0013-05
Size effect modification of the Park-Ang damage model for RC columnsXie Yongping1, 2, Li Zhenbao1, Du Xiuli1, Ma Hua1(1 The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China; 2 College of Exploration Technology and Engineering, Shijiazhuang University of Economics, Shijiazhuang 050031, China)Abstract: The experiment results of 18 reinforced concrete columns under low cycle reversed loading and monotonic horizontal loading show that the damage index based on Park-Ang damage model decreases as section size increases, which exists size effect. The more serious the component damages, the more obvious the size effect shows, and size effects of energy and displacement are dissimilar. Then on the basis of experiment, a modified formula of Park-Ang damage model considering section size effect coefficient was proposed.The results indicate that the modified formula of size effect of the Park-Ang damage model can improve the degree of coincidence between prediction results and test results.Keywords: reinforced concrete column; damage model; displacement; energy consumption; size effect
*国家自然科学基金项目(50838001, 51178014,51408378),中国博士后科学基金项目（2014M560033）,河北省自然科学基金资助项目（E2015403018）作者简介：解咏平，博士，副教授,Email：axypa@163.com。
