碳纤维加固严重破坏砌体墙的试验研究

为研究碳纤维布加固严重破坏砌体墙的有效性,开展了4片严重破坏墙体的碳纤维布加固试验,研究了试件在低周反复荷载作用下的试验性能,考查了其破坏形态和破坏特征,对比分析了墙体的承载力、延性和耗能能力等性能。研究表明:采用粘贴碳纤维布加固严重破坏墙体的方法是可行且有效的;加固后墙体的抗剪承载力、变形性能都较原墙墙体有明显提高;碳纤维布布置方法不同,对墙体的约束效果不同;碳纤维布破坏时其应变远小于其极限抗拉应变,建议碳纤维布加固严重破坏墙体时无须使用高强度的碳纤维布。

Experimental research on masonry walls retrofitted with CFRP after severe damage

In order to testify the effectiveness of retrofitting the severely damaged masonry wall with carbon fiber reinforcement polymer(CFRP),four severely damaged masonry walls retrofitted with CFRP are provided.The test performance of specimens designed and tested under cyclic lateral load is researched,at the same time,the failure model and failure characteristic are investigated,and the strength,the ductility,and the energy dissipation are comparatively analyzed.The test data indicate that:the severely damaged masonry wall retrofitted with CFRP is effectively,and compared with the original masonry wall,the maximum horizontal load and the distortion capacity of retrofitted wall are increased significantly.Confining effect of different CFRP styles is different,and the CFRP strain of broken wall is far less than the CFRP ultimate strain.Therefore,the higher strength CFRP need not be considered when retrofitting severely damaged masonry walls.