碳纤维布抗震加固砌体墙片研究

通过2片碳纤维布加固砌体墙体在周期反复荷载作用下受力性能的试验,利用对比的方法,把加固试件的极限荷载和极限位移与未加固对比试件的极限荷载和极限位移进行比较,表明了用双面粘贴碳纤维布来增强砌体墙片抗震能力这种加固方法的有效性,发现了加固墙体的裂纹总出现在底部灰缝处的破坏特征,分析了碳纤维布不同粘贴方式对砌体墙片抗震加固效果的影响。在此基础上,得出了碳纤维布加固砌体墙体确实能大大提高墙体的延性、耗能能力和抗剪承载力的结论。提出了碳纤维加固是一种有效且可靠的方法,可供施工参考。

A Research of CFRP Seismic Retrofit of Masonry Walls

The effectiveness of the method of CFRP seismic retrofit of masonry walls is investigated by exposing two pieces of walls to cyclic loads to test the mechanical properties.It is made to compare ultimate bearing ability and ultimate displacement of retrofitted specimens with those of reference specimen.It shows the effectiveness of method of doubly applying of CFRP to the walls and development of cracks at the bottom joints.An analysis of the effect of different arrangements of CFRP on the walls on retrofitting effect is made.Based on it,the conclusion that CFRP beefs up the flexibility,ability of releasing energy and anti-shearing ability significantly is drawn.The method is considered to be effective and reliable and it can be as a reference to guide the retrofit practice.