再生混凝土中高剪力墙的抗震性能研究

STUDY ON ASEISMIC BEHAVIOR OF MID-RISE RECYCLED AGGREGATE CONCRETE SHEAR WALL

为了研究不同的再生细骨料掺量、配筋率、轴压比剪力墙的抗震性能,该文进行了7个剪跨比为1.5的中高剪力墙低周反复荷载试验研究。在试验的基础上,分析了各剪力墙的承载力、延性、刚度、滞回特性、耗能及破坏特征。研究表明:再生细骨料掺量的增加,使再生混凝土中高剪力墙的抗震性能有所降低;配筋率的提高,使再生混凝土中高剪力墙的承载力、延性、耗能能力有所提高;轴压比的提高,使再生混凝土剪力墙的承载力提高,弹塑性变形能力降低。在一定条件下,再生混凝土可用于一些剪力墙结构工程。

In order to investigate the aseismic performance of the mid-rise recycled concrete shear wall with the different percent of fine aggregate replacement,reinforcement ratio and axial compression ratio,a low-frequency quasi-static cyclic loading experimental study on seven mid-rise shear walls with a shear-span ratio of 1.5 was carried out.Based upon the experimental study,the load-carrying capacity,ductility,stiffness,hysteretic behavior,energy dissipation and failure phenomena of each shear wall were analyzed.The experiments indicate that the more of the fine aggregate replacement,the poorer the aseismic performance of a recycled concrete shear wall,and the aseismic performance of a recycled aggregate concrete shear wall could be greatly improved by increasing the reinforcement ratio.With the increasing of the axial force ratio,the load-carrying capacity of the shear wall is increased but the ductility is decreased.At some conditions,the recycled aggregate concrete shear wall is able to satisfy the structure aseismic design requirement.