水平粘贴CFRP加固多孔砖砌体墙的抗震性能试验  

Experimental Study on Seismic Behavior of Perforated Brick Masonry Walls Strengthened with Horizontal CFRP Sheet

作　　者：李国东[1] 左宏亮[1] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040

出　　处：《沈阳建筑大学学报（自然科学版）》2015年第4期585-592,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51208083);黑龙江省自然科学基金项目(E201217)

摘　　要：目的研究水平粘贴CFRP加固多孔砖砌体墙的抗剪承载力及延性,探讨CFRP粘贴基层处理方式对多孔砖砌体墙抗震加固性能的影响.方法通过对3片多孔砖砌体墙试件的低周反复荷载试验,分析了采用水平方向粘贴CFRP加固的多孔砖砌体墙的破坏过程及加固效果,讨论了加固后的墙体试件的受剪承载力、受剪破坏形态以及CFRP粘贴方式对加固墙体抗震性能的影响.结果对比未加固的墙体,有砂浆基层的CFRP加固的墙体试件开裂荷载及受剪承载力分别提高了3.6%和8.2%,极限变形增大1倍;直接在砌块表面粘贴CFRP加固的墙体试件开裂荷载及受剪承载力分别提高了16.3%和27.8%,极限变形增大1.5倍.结论多孔砖砌体墙上水平方向粘贴的CFRP能延缓墙体裂缝的开展,提高墙体的抗剪承载力,增强墙体的整体性,增大墙体的极限变形,从而改善墙体抗震性能;直接将CFRP粘贴在墙体的砌块上抗震加固效果更好.This paper studied shear bearing capacity and ductility of porous brick masonry wall strengthened with CFRP and investigated its seismic behavior. Through tests for 3 specimens of porous brick masonry wail under low cyclic loading, failure process and reinforced effects of the wall with horizontally pasted CFRP were analyzed. Shear bearing capacity, shear failure form and influences of CFRP paste on wall seismic behavior were discussed. It is found that the failure load and the shear capacity of the CFRP reinforced wall with mortar base respectively increase 3.6%and 8.2 %, in comparison with the wall without reinforcement. And the limit deformation increases one times. For the specimen with CFRP that is directly adhered on the wall surface, the failure load and shear strength increase 16. 3% and 27.8%, respectively, compared with no reinforcement wall. The limit deformation increases 1.5 times. Conclusion is that the porous brick masonry wall with horizontally pasted CFRP can delay wall cracking, increase shear bearing capacity and limit deformation, strengthen the wall integrity and thus the wall seismic behavior can be improved. The reinforcement effect with CFRP adhered directly on the wall surface is significant.

关 键 词：多孔砖砌体墙 CFRP加固 抗震性能 低周反复荷载试验 受剪承载力 

分 类 号：TU362[建筑科学—结构工程]