CFRP加固砌体结构的力学性能分析

在分析碳纤维加固的砖砌体在水平周期反复荷载作用下试验结果的基础上,研究了碳纤维加固砖砌体的约束及抗倒塌机理;建立了墙体侧向位移与碳纤维应变、碳纤维应变与墙体抗震剪切强度的关系;讨论了不同加固方式、碳纤维面积百分率等在墙体不同受力阶段对墙体抗剪承载能力和变形性能的作用与影响;提出了计算碳纤维加固墙体承载能力和变形的计算方法。计算方法考虑了不同粘贴碳纤维角度、碳纤维面积百分率等对墙体承载能力和变形性能的影响;推导了最优粘贴加固角;提出了改进的粘贴加固方法以提高加固效果。

MECHANICAL BEHAVIOR OF MASONRY WALLS STRENGTHENED WITH CFRP

Based on experimental results of masonry walls subjected to low-cycle repeated lateral loads, this paper analyzes the strengthening and restrainting effects of CFRP in preventing the collapse of cracked masonry walls. Two factores that influence the loading capacity and deformation behavior of walls are investigated: CFRP bonding way and the CFRP reinforcement ratio. Experimental results show that the shear capacity of masonry wall depends on CFRP strain, which, furthurly depends on the wall’s lateral deformation. With different wall’s lateral deformation, the strengthening effect of CFRP is different. A simplified method to estimate loading and deformation capacity of masonry walls strengthening with CFRP is proposed in this paper, which is valid for different CFRP bonding angle and different bonding way. The optium CFRP bonding angle is discussed and an improved CFRP bonding way is suggested.