GFRP加固带壁柱砖墙平面外受荷性能试验

Experimental Research on Out-of-Plane Performance Capacity of GFRP Strengthened Brick Walls with Pilaster

通过两批试件(7个试件)9次试验,研究玻璃纤维复合材料(GFRP)加固带壁柱砖墙的平面外受荷性能.由试验结果分析可知,采用GFRP对带壁柱砖墙进行加固,可以有效地提高砖墙的平面外抗弯能力和延性.即可以提高砖墙的极限承载力.对于刚度较大的带壁柱墙体,当GFRP加固量达到一定程度,其平面外抗弯承载能力得到较大的提高,而平面外方向的抗剪承载能力提高有限,导致试件的平面外受荷能力由其抗剪承载能力控制.采用不对称加固,会导致墙体的裂缝开展不对称,从而使得墙体刚度不对称,墙体出现附加扭转,减弱GFRP对墙体抗弯承载能力的加固效果.

It＇s carried out the experimental research on out-of-plane capacity of GFRP （glass fiber reinforced polymers） strengthened brick walls with pilaster, by two batch specimens （seven brick wall specimens） for 9 times. The experimental results indicate： GFRP strengthening can effectively increase the out-of-plane flexural capacity and ductility of brick walls, namely, improving the ultimate load-carrying capacity. For larger-stiffness brick walls with pilaster, when increasing the quantity of GFRP to a certain degree, the out-of-plane flexural capacity of the brick walls increases obviously, but the increment of out-of-plane shear capacity is limited, thus the out-of-plane capacity of the specimens is controlled by the out-of-plane shear capacity. When adopting the unsymmetrical strengthening, both crack distribution and stiffness of the wall are unsymmetrical, thus an additional torsion occurs, the GFRP strengthening effect of the wall flexural capacity reduces.