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何助節(jié)1， 徐 濤2， 宋寶東1， 唐春安3
（1 中建國際（深圳）設計顧問有限公司，深圳 518048；2 大連大學材料破壞力學中心，大連116622；3 大連理工大學土木工程學院，大連 116024）[摘要] 基于FRP-混凝土面內單剪搭接試驗，采用材料三維真實破壞過程分析系統(tǒng)(RFPA3D)，通過變換FRP板寬，對FRP-混凝土界面粘結性能進行了三維有限元研究，得出了各荷載-滑移曲線及FRP板與混凝土中沿板長和板寬方向的應力、應變分布曲線，從而分析板寬對FRP-混凝土界面粘結性能的影響。數(shù)值結果表明，F(xiàn)RP板寬對混凝土界面粘結性能產生重要影響，F(xiàn)RP板和混凝土中應力、應變值沿板寬方向的分布是不均勻的，且混凝土中應力應變的峰值均出現(xiàn)在板邊緣及粘結段加載端附近。
[關鍵詞] FRP-混凝土；單剪試驗；有限元分析；剝離破壞；粘結性能；應力應變分布
中圖分類號：TU398.7 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0794-07Numerical simulation on the effect of FRP sheet width on bonding performance of FRP-concrete interface
He Zhujie1, Xu Tao2, Song Baodong1, Tang Chun' an3
(1 China Construction( Shenzhen) Design Intemational Co., Ltd., Shenzhen 518048, China; 2 Center for Material Failure Modelling Research, Dalian University, Dalian 116622, China; 3 School of Civil Engineering, Dalian University of Technology, Dalian 116024, China)Abstract: Based on the FRP-to-concrete single shear test, 3D finite element analysis on bonding performance of FRP-concrete interface was performed with the RFPA-3D program on the condition of various width of FRP sheet. The load-global slip curves, stress and strain curves along the sheet length and the sheet width direction in FRP sheet and concrete were obtained and the effect of FRP sheet width on bonding performance of FRP-concrete interface was numerically studied. Numerical results show that FRP sheet width is of great importance on the bonding performance of FRP-concrete interface. It is also shown that the distribution of stress and strain along the sheet width direction in FRP sheet and concrete is no-uniform, and the maximum values of stress and strain in concrete both appear at the edge of the FRP sheet and the loaded end.
Keywords: FRP-concrete; single shear test; finite element analysis; debonding destruction; bonding performance; distribution of stress and strain
