CFRP布修复震损高强混凝土柱抗震性能试验研究

Experimental investigation on seismic behavior of damaged high strength concrete columns repaired with CFRP sheets

为了研究CFRP(碳纤维)布修复震损高强混凝土方柱的抗震性能,共进行了4个高强混凝土方柱试件模型的低周反复荷载试验,分别研究横向CFRP布方式加固试件和修复震损试件、横向结合L型CFRP布方式修复震损试件的抗震性能。在试验数据的基础上分析对比了试件的延性性能、承载力、能量耗散、刚度退化以及CFRP应变。研究结果表明:经过2种不同方式修复的震损破坏试件的抗震性能得到了明显改善,延性性能远远比对比试件的好,但是仍然比未经震损直接加固的试件的延性略低,其中采用横向结合L型CFRP布方式修复的试件所表现的抗震性能较好。

In order to investigate the seismic behavior of high strength concrete square columns repaired with CFRP sheets, four high strength concrete square columns were tested under low reversed cyclic loading. The test included one reference column, one undamaged umns repaired with wrapped jacketing and L - Based on the test data, the ductility, bearing column strengthened with wrapped jacketing, two damaged col- shaped jacketing combined with wrapped jacketing separately. capacity, energy dissipation, stiffness degradation, and CFRP sheets strain for different columns were compared systematically. The results show that the seismic behavior of two repaired columns are significantly improved. The ductility of these two columns become much better than that of reference column, but are slightly worse than the undamaged Compared with the wrapped jacketing method, the method of L - eting is more effective in repairing the damaged column column strengthened with wrapped jacketing. shaped jacketing combined with wrapped jacketing is more effective in repairing the damaged column.