CFRP加固砌体结构的试验研究

EXPERIMENTAL STUDY ON MASONRY WALLS STRENGTHENED With CFRP

采用两种不同的加固方案,对四片砌体墙进行了试验研究,介绍了试验中对构件的加载控制过程,分析了用CFRP加固后砌体结构在水平低周反复荷载作用下的延性和水平承载能力,并对各种方案的试验结果及试验现象进行了分析研究,比较了不同的加固方案对砌体的抗剪承载力、抗震性能、延性等各方面的影响程度,根据试验结果提出了简易计算公式,计算值与试验数据吻合较好。理论与试验证明,采用CFRP加固后,砌体结构具有良好的抗震性能。因而,CFRP加固砌体结构的方法,不失为一种比较有效可行的方法。

In order to study the ductility and the lateral-load-carrying capacity of the masonry walls strengthened with CFRPs (Carbon Fiber Reinforced Polymer sheets), four pieces of masonry walls subjected to low-frequency cyclic loads and a constant-amplitude vertical load have been tested. As the strengthening efficiency is influenced by the strengthening method, two different strengthening methods have been introduced so as to compare the strengthening efficiency of different strengthening methods. It is found that the masonry walls strengthened with CFRPs are of good ductility and lateral-load-carrying capacity. In order to quantify the improvement of the carrying capacity and performance of the masonry walls after strengthened with CFPRs, some simplified calculating formulae have been developed based on the experimental results, and the theoretical results computed by the formulae agreed reasonably well with the experimental ones. All the results show that CFRP-strengthening-method is one of effective methods to strengthen masonry structures.