型纤维加固钢筋混凝土框架节点的抗震性能

Seismic Performance of Rehabilitated RC Framed Joints Strengthened with L Shaped FRP

摘要:

试验研究了L型外贴纤维片材（FRP）加固震损钢筋混凝土框架节点的抗震性能，结果表明碳纤维(CFRP)和玄武岩纤维(BFRP)可以提高节点的承载力.采用常规的受弯加固计算公式，得到的纤维应变值和试件的承载力远大于试验值.借鉴基于端部剥离的侧面粘贴纤维加固材料抗剪加固的算法，计算结果与试验数据相符，表明该算法可以用于分析L型外贴纤维加固钢筋混凝土内框架节点的力学性能.

Abstract:

This paper researches the rehabilitated effects of seismic damaged reinforced concrete (RC) interior framed joints externally strengthened with L shaped fiber reinforced polymer (FRP) laminates and the results show that FRPs can enhance the ultimate strength of the joints. However, the strain values calculated by the bending strength formula in American Concrete Institute (ACI) code and references of Chen and Teng are much higher than those obtained in the test. For this reason, the writers adopt the method by shear strengthening with FRP being sticked on two sides. The calculation results agree with the test results, which proves the arithmetic to be able to be used to analyze the mechanism performance of the internal framed joints externally strengthened with L shaped fibers.