HPFL加固震损短肢剪力墙抗震性能试验研究

Study on the Seismic Performance of Earthquake-Damaged Short-Pier Shear Walls Reinforced with HPFL

通过对1片未加固和3片加固的1:2缩尺比例的L形开洞RC短肢剪力墙模型进行低周反复荷载试验,研究不同受力阶段HPFL加固开洞短肢剪力墙的抗震性能。研究结果表明:HPFL加固法能够有效提高短肢剪力墙的承载力、延性性能和耗能能力。不加轴力的一次受力加固短肢剪力墙,其抗震承载力与延性均有大幅度改善;对于有震损的不卸轴力二次受力加固短肢剪力墙,其加固效果随其震损程度的增大而降低;同时,通过HPFL对试件进行加固可以有效改善试件的抗裂性能。

A series of low cyclic loading tests have been conducted on short-pier shear walls with one nonreinforced and three reinforced L-shaped RC frames with openings in the ratio of1:2,followed by a research on the seismic performance of earthquake-damaged short-pier shear walls reinforced with HPFL in different loading phases.Experimental result shows that HPFL reinforcement can effectively improve the bearing capacity,ductility performance and energy dissipation of short-pier shear walls.The shear bearing capacity and ductility of short pier shear walls are to strengthen with one axial force improved greatly,and the reinforcement effect is to increase with the earthquake damage degree lowered for the short pier shear walls with two axial force without earthquake forces.Meanwhile,the reinforcement of the specimens with HPFL helps to effectively enhance the crack resistance of the components.