【摘要】 通过对设有圈梁与构造柱的砌体结构采用体外预应力筋加固和未加固模型进行双向拟动力试验,对墙体裂缝开展、结构耗能、结构损伤等指标进行对比分析,探讨体外预应力筋加固对砌体结构抗震能力的影响。试验结果表明:体外预应力筋产生的约束力对限制裂缝开展、防止圈梁与预制楼板的脱空效果明显;砌体结构在体外预应力筋加固后的总滞回耗能大于未加固体系,而损伤指标小于未加固体系,由此可见体外预应力筋加固提高了结构耗能能力,同时减小了结构在地震中的破坏程度。更多还原

【Abstract】 By bi-directional pseudo-dynamic testing,the seismic performence of masonry structure with ring beams and constructional columns,which was strengthened by external prestressed bars,was studied.The main conclusions drawn from the testing were: pretressed bars have obviously limited the developing of the crack;the structure has a good recovery performance,and the cracks close again after the end of loading;it is helpful to prevent the floor from being away from the wall;strengthened structure plays a key role for energy dissipation and the structural damage is minor compareed with the structure without prestressed bar.So the prestressed bars greatly improve the seismic performance of masonry structure.更多还原