锈蚀低矮钢筋混凝土剪力墙抗震性能试验研究

模拟近海大气环境对5榀不同设计参数的低矮RC剪力墙试件进行加速锈蚀试验，达到预期锈蚀目标后，对锈蚀试件进行拟静力试验，旨在研究不同水平分布筋间距和不同暗柱纵筋直径对锈蚀低矮RC剪力墙承载力、变形能力及剪切滞回特性等抗震性能的影响。结果表明:沿暗柱纵筋的锈胀裂缝较沿水平分布筋和暗柱箍筋的宽，而水平分布筋和暗柱箍筋的锈蚀率则比暗柱纵筋的大；随着水平分布筋间距的减小，锈蚀试件剪切破坏程度降低，剪切变形减小，而试件承载力、延性和耗能分别有不同程度的提高，其中以延性提高幅度最大；随着暗柱纵筋直径的增大，锈蚀试件受弯能力得到较大提升，剪切破坏程度增加，剪切变形增大，试件承载力、延性和耗能亦分别有不同程度的提高，其中承载力提高最多，延性和耗能提高相对较少。

Experimental study on seismic behaviors of corroded squat reinforced concrete shear walls

In order to study seismic behaviors of corroded squat reinforced concrete (RC) shear wall, such as bearing capability, deformation capacity and energy-dissipating capacity under different spacing of horizontal reinforcement and diameter of longitudinal reinforcement, five RC shear walls were accelerated corrosion under the artificial climate to simulated coastal atmospheric environment, and pseudo-static tests of these corroded specimens with the same corrosion degree and axial compression ratio were carried out. The results show that the corrosion cracks along the longitudinal reinforcement are wider than those along the horizontal reinforcement and stirrup of concealed column, while the corrosion rate gives an opposite results. Reducing the spacing of the transversely distributed reinforcements can decrease the degree of shear failure of corroded specimens and improve the bearing capacity, ductility and energy dissipation capacity of corroded specimens in different degrees. The ductility gets the highest increase, which leads to the reduction of the shear deformation. The improvement of the seismic behavior of corroded squat RC shear walls by increasing the horizontal reinforcement ratio can be achieved by increasing the diameter of the longitudinal reinforcement, which makes the bearing capacity get the highest increase. The shear deformation of corroded specimens also gets larger because the bending capacity of the corroded specimens is greatly improved and the shear failure is delayed.