粘钢加固钢筋混凝土剪力墙抗震性能试验研究

通过一组试验研究不同粘钢加固方式对钢筋混凝土剪力墙抗震性能的影响.本研究设计制作了6片钢筋混凝土剪力墙,并对这些试件进行了拟静力低周反复加载试验,这6个试件包括不经加固的混凝土剪力墙、只用水平U形箍加固的剪力墙、用水平U形箍和竖向钢材加固但端部锚固方式不同的剪力墙.在试验中记录了各试件在水平反复荷载下的荷载-位移滞回曲线、钢筋应变、墙体裂缝分布及墙体的破坏现象.分析了不同粘钢加固方式对混凝土剪力墙水平承载力、位移延性、耗能能力的影响.试验结果表明以粘钢加固的方式加固钢筋混凝土剪力墙,可以有效地改善剪力墙的抗震性能,并且,可靠的端部锚固方式对粘钢加固剪力墙的抗震性能也至关重要.

Experiment Study on Seismic Behavior of Reinforced Concrete Walls Strengthened by Bonded Steel

Bonded steel has been widely used in reinforced concrete wall strengthening. This paper focused on the seismic behavior of the RC walls strengthened by different bonded steel method through a series tests. 6 specimens were designed including none strengthened RC walls, strengthened RC walls by U type steel plates and strengthened RC walls by U type steel plates and vertical steel plates but with different end fixing modes. All the specimens are tested under reversed cyclic quasi-static loading. Records have been made on the forcedisplacement hysteretic curves, the strain of the reinforced bar, the scattering of the crack and the failure modes of the specimens. The effects of different bonded steel strengthening scheme on the horizontal force resistance capacity, displacement ductility, and energy dissipation capacity of the specimens are analyzed. According to the test results, bonded steel strengthening scheme can effectively improve seismic behavior of RC walls. Also, a reliable end-fixing mode of the bonded steel is important to the seismic behavior of the strengthened walls.