再生混凝土低矮剪力墙抗震试验及分析

Research on Seismic Performance of Low-rise Recycled Concrete Shear Walls

为了研究再生粗骨料和细骨料掺量对剪力墙抗震性能的影响,对5个剪跨比为1.0的再生混凝土低矮剪力墙进行了低周反复荷载试验,包括1个普通混凝土剪力墙、3个再生混凝土剪力墙及1个加配暗支撑的再生混凝土剪力墙.对比分析了各剪力墙的承载力、刚度、延性、滞回特征、耗能能力及破坏特征,并进行了承载力计算.研究表明,掺入再生粗骨料的再生混凝土低矮剪力墙的抗震性能和普通剪力墙相差不多,再生粗骨料的掺量对剪力墙的性能影响不大,再生细骨料的掺量对剪力墙的性能影响稍大,加配暗支撑钢筋的再生混凝土剪力墙抗震性能明显提高.

To know the seismic performance of the low-rise recycled concrete shear wall with different percent of recycled coarse aggregate and recycled fine aggregate,a low-frequency quasi-static cyclic loading experiment on low-rise shear walls with a shear-span ratio of 1.0 was carried out.They are one usual concrete shear wall,three recycled concrete shear walls,and one recycled concrete shear wall with concealed bracing.Based on the experimental study,the load-carrying capacity,stiffness,ductility,hysteretic behavior,energy dissipation,and failure phenomena of each shear wall are analyzed,and the bearing capacity is calculated theoretically.Results indicate that the low-rise shear walls with recycled coarse aggregate show poorer seismic performance than the common wall,and the recycled coarse aggregate replacement has little influence on the seismic performance of the shear wall;however the recycled fine aggregate replacement has a little larger influence.The recycled concrete shear wall with concealed bracing shows much better seismic performance.