FRP(纤维增强聚合物)片材单面搭接性能分析-OALib.PDF

第 26 卷第 8 期 Vol.26 No.8 工 程 力 学 2009 年 8 月 Aug. 2009 ENGINEERING MECHANICS 251 文章编号：1000-4750(2009)08-0251-06 FRP(纤维增强聚合物)片材单面搭接性能分析 * 李 杉， 任慧韬，黄承逵，崔云飞 (大连理工大学海岸和近海工程国家重点实验室，辽宁，大连 116024) 摘 要：《碳纤维片材加固修复混凝土结构施工技术规程》给出了CFRP (碳纤维增强聚合物)与 CFRP 搭接长度不 应小于 100mm，其合理性仍需要进一步研究分析。该文根据单面搭接一维经典弹性理论，考虑胶层的弹塑性，推 导了 FRP 单面搭接“有效搭接长度”的计算公式。并手工制作了 12 组 FRP 单面搭接试件，对搭接试件进行静力 拉伸试验，考察了 FRP 与 FRP 界面的粘结应力分布，对有效搭接长度进行了分析。试验结果分析表明：对任何 搭接长度，最大剪应力发生在搭接的端部区域；CFRP 的有效搭接长度大约在 75mm ―100mm，GFRP(玻璃纤维 增强聚合物) 的有效搭接长度大约在 100mm―125mm 之间，公式计算的有效长度与试验结果基本吻合。所得结论 为 CFRP 片材加固混凝土技术规程提供一定的参考。 关键词：纤维增强聚合物；单面搭接；有效搭接长度；粘结应力；试验研究 中图分类号：TU528.572 文献标识码：A BEHAVIORS OF FRP (FIBER REINFORCED POLYMER) SINGLE LAP BOND * LI Shan , REN Hui-tao , HUANG Cheng-kui , CUI Yun-fei (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China) Abstract: In “Technical Specifications for Strengthening Concrete Structures with Carbon Fiber Reinforced Polymer Laminate”, the overlap length of CFRP (carbon fiber reinforced polymer) is required to be 100mm at least. To examine the rationality of this requirement, based on the classical elasticity theory and elastic –plastic property of adhesive, a simplified formula to calculate the effective bond length of FRP single lap bond (SLB) is presented. Twelve groups of FRP SLB specimens were made by hand, and they were tested under static loading. The shear stress distribution in the overlap zone was measured, which leads to the derivation of the effective bond length of FRP SLB. The test results indicate tha