【摘要】 北京前三门地区有一大批始建于20世纪70年代的混凝土建筑,主要结构形式为鱼骨式剪力墙。由于修建时间早,其混凝土强度和配筋率远低于现行混凝土结构抗震规范要求。为了检验该结构的抗震性能,针对其剪力墙结构的受力特点,制作了4个剪力墙试件。对4个墙体进行了在不同轴压比条件下的拟静力往复加载试验,获得了试件的承载力、刚度和变形能力等数据。试验结果表明,该墙体承载力低,延性差,不满足规范要求,需要进行加固。更多还原

【Abstract】 A large number of reinforced concrete(RC) buildings constructed in the 1970s,whose main structural form is fish-bone shear wall,are still used in Qiansanmen area of Beijing.Due to the economical and technical limitation at the time,both the concrete strength and reinforcement ratio are far from satisfying the requirements given in the current seismic design code for concrete structures.In order to investigate the seismic performances of the wall with the low concrete strength and reinforcement ratio,four RC shear wall specimens were constructed and tested.Quasi-static tests considering large axial compression ratio were carried out,and the stiffness,the strength and the energy dissipation capacity of the RC shear walls are investigated.Test results suggest that the wall with low concrete strength and reinforcement ratio has low strength and poor deformation capacity,indicating the necessity of strengthening.更多还原