再生混凝土框架-剪力墙结构抗震研究与应用

EXPERIMENTAL STUDY ON THE SEISMIC BEHAVIOR OF RECYCLED CONCRETE FRAME-SHEAR-WALL STRUCTURE

笔者对再生混凝土建筑结构的抗震性能进行了较为系统的研究,该文完成了2个框架-剪力墙结构模型低周反复荷载下抗震性能试验研究,模型均按1/2.5缩尺,其中模型1为全再生混凝土结构,模型2为底部普通混凝土、上部全再生混凝土结构。对比分析了2个试验结构的破坏特征、滞回性能、延性、刚度及耗能能力。进行了再生混凝土框架-剪力墙结构的弹塑性有限元分析,分析结果与试验结果符合较好。试验和分析结果表明:全再生混凝土结构与底部普通混凝土、上部全再生混凝土结构的承载力、刚度退化规律、弹塑性变形能力、耗能能力、屈服机制、破坏特征均接近;经合理设计,再生混凝土在8度及以下地震区的多层结构和高层结构上部受力较小的楼层应用可满足要求。

A series of research on aseismic behavior of the recycled concrete structure was carried out by the authors.In this paper,a low-cycle loading experiment for two 1/2.5 scale frame-shear-wall structures was carried out,one of the specimens was made out of recycled concrete,the first floor of the other was made out of natural concrete and the second floor was made out of recycled concrete.The failure feature,hysteretic property,ductility,stiffness and energy dissipation of the two specimens were analyzed.On the basis of experiments,an elastoplastic finite element analysis was carried out;the simulation results were in good agreement with those of being measured.Test and analysis results show that,the recycled concrete frame-shear-wall structure has the similar load-carrying capacity,stiffness attenuation,elastoplastic displacement capacity,energy dissipation capacity,yield mechanism and failure feature with that of a frame-shear-wall structure of which the first floor being made out of natural concrete and the second floor being made out of recycled concrete.Through rational designing,the multilayer building or the upside of high-rise building being made out of recycled concrete could meet the aseismic design requirements in the region of which the aseismic fortification intensity is 8.