鋼筋混凝土柱Park-Ang損傷模型的尺寸效應(yīng)修正*
解詠平1,2，李振寶1，杜修力1，馬華1
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（1 北京工業(yè)大學城市與工程安全減災(zāi)教育部重點實驗室，北京 100124；2 石家莊經(jīng)濟學院勘查技術(shù)與工程學院，石家莊 050031）
［摘要］通過18個不同截面尺寸的鋼筋混凝土柱的單調(diào)和低周反復(fù)加載試驗，發(fā)現(xiàn)基于Park-Ang損傷模型得到的損傷指標隨截面尺寸的增大而降低，存在尺寸效應(yīng)；構(gòu)件損傷越嚴重，尺寸效應(yīng)越明顯，且位移項與能量項所表現(xiàn)的尺寸效應(yīng)也不相同。在試驗研究的基礎(chǔ)上，提出了考慮截面尺寸影響系數(shù)的ParkAng損傷模型修正公式。結(jié)果表明，Park-Ang損傷模型的尺寸效應(yīng)修正公式能夠改善預(yù)測結(jié)果與試驗結(jié)果的符合程度。［關(guān)鍵詞］鋼筋混凝土柱; 損傷模型; 位移; 耗能; 尺寸效應(yīng)中圖分類號：TU375.3 文獻標識碼：A 文章編號：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
*國家自然科學基金項目(50838001, 51178014,51408378),中國博士后科學基金項目（2014M560033）,河北省自然科學基金資助項目（E2015403018）作者簡介：解詠平，博士，副教授,Email：axypa@163.com。
