FRP加固梁抗弯计算和试验分析  

THE EXPERIMENTAL ANALYSIS AND CALCULATION OF FLEXURAL CAPACITY OF RC BEAMS STRENGTHENED WITH FRP SHEETS

作　　者：郑建军[1] 廖永石[2] 朱彦鹏[2] 

机构地区：[1]甘肃土木工程科学研究院,兰州730020 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《低温建筑技术》2010年第9期38-40,共3页Low Temperature Architecture Technology

摘　　要：对二次受力FRP加固梁的试验数据进行收集,发现考虑滞后应变与否对计算结构影响很小,但是这和有的试验值不太吻合。FRP强度折系数在粘贴层数越多时,该系数就越小,三层时约为0.524,建议粘贴层数不要超过三层。加固设计是应保证当Afe≥Af,min,此时发生混凝土压碎破坏,规范公式计算偏于安全。By the analysis on the flexural experimental data collected from strengthening RC beams under quadratic loading , it is demonstrated that the lagged strain has little affected the results calculating from existing formula, but it does not agree well with some experimental results. When the layers increase more, the strength reduction factor of FRP becomes less. So the layers should not surpass three as the strength reduction factor is 0. 524 at three layers. In the reinforcing design, the formula of code is safe when the effective sectional areas Afe≥ Af.min and corresponding failure mode is that cover concrete is crushed.

关 键 词：FRP 加固 抗弯计算 试验 二次受力 

分 类 号：TU375.102[建筑科学—结构工程]