何助节¹，  徐  涛²，  宋宝东¹，  唐春安³
   （1 中建国际（深圳）设计顾问有限公司，深圳 518048；2 大连大学材料破坏力学中心，大连116622；3 大连理工大学土木工程学院，大连 116024）

[摘要] 基于FRP-混凝土面内单剪搭接试验，采用材料三维真实破坏过程分析系统(RFPA3D)，通过变换FRP板宽，对FRP-混凝土界面粘结性能进行了三维有限元研究，得出了各荷载-滑移曲线及FRP板与混凝土中沿板长和板宽方向的应力、应变分布曲线，从而分析板宽对FRP-混凝土界面粘结性能的影响。数值结果表明，FRP板宽对混凝土界面粘结性能产生重要影响，FRP板和混凝土中应力、应变值沿板宽方向的分布是不均匀的，且混凝土中应力应变的峰值均出现在板边缘及粘结段加载端附近。
[关键词] FRP-混凝土；单剪试验；有限元分析；剥离破坏；粘结性能；应力应变分布
中图分类号：TU398.7    文献标识码：A    文章编号：1002-848X(2012) Sl-0794-07

Numerical 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