- 摘 要
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(1 哈爾濱工業(yè)大學(xué)土木工程學(xué)院,哈爾濱 150090；2 中國建筑北京設(shè)計(jì)研究院建筑事業(yè)
部,北京 100037）
［摘要］對12個(gè)碳纖維約束混凝土棱柱體試件（100×100×300）進(jìn)行了重復(fù)荷載受壓試驗(yàn)，分析了重復(fù)荷載作用下碳纖維約束混凝土加載及卸載應(yīng)力-應(yīng)變曲線的特征，基于試驗(yàn)結(jié)果的回歸分析，建立了加卸載準(zhǔn)則的數(shù)學(xué)表達(dá)式。分析預(yù)測與試驗(yàn)結(jié)果的比較證明了所提出的加卸載準(zhǔn)則的準(zhǔn)確性及適用性，為軸力和往復(fù)水平荷載作用下碳纖維約束混凝土柱的非線性分析提供了材料的滯回本構(gòu)模型。
［關(guān)鍵詞］碳纖維；重復(fù)荷載；約束；應(yīng)力-應(yīng)變關(guān)系；本構(gòu)模型
Loading and unloading criteria of FRP-confined concrete under cyclic compression
Wang Zhenyu1, Li Hongpeng2(1 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090,China；2 Department of Architecture, China Beijing Architectural Design & Research Institute Ltd., Beijing 100037,China)
Abstract: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.
Keywords:carbon fiber；cyclic loading; confinement; stress-strain relationship; constitutive modeling
國家自然科學(xué)基金項(xiàng)目(50408010)；北京市重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(EESR2005-3)。
作者簡介：王震宇，博士，副教授，Email:zhenyuwang@hit.edu.cn。
參考文獻(xiàn)
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