不同再生骨料取代率再生混凝土柱抗震试验研究  

An experimental study on the seismic behavior of recycled concrete columns with different recycled aggregate substitution ratios

作　　者：尹海鹏[1,2] 曹万林[1,2] 张亚齐[1] 张建伟[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]城市与工程安全减灾省部共建教育部重点实验室,北京100124

出　　处：《世界地震工程》2010年第1期57-63,共7页World Earthquake Engineering

基　　金：北京市科技计划重点项目(D07050601670701);国家十一五科技支撑计划课题项目(2008BAJ08B14);北京市自然科学基金项目(8102010)

摘　　要：进行了1根普通混凝土柱和3根不同再生骨料取代率的再生混凝土柱模型的低周反复荷载试验研究,模型按1/2缩尺。在试验基础上,分析了其承载力、刚度及其退化过程、滞回特性、延性、耗能能力、破坏形态等,提出了基于混凝土强度折减的承载力实用计算方法。研究表明:随着再生骨料取代率的增加,其混凝土的弹性模量明显减小,试件初始刚度明显下降、承载力呈下降趋势、耗能值下降,抗震能力呈下降趋势。再生混凝土柱可用于多层结构轴压比较小的柱的抗震设计。Experiment researches on four 1 /2 scale columns under cyclic loading action were done,one of them is a natural concrete column and the others are recycled concrete columns with different recycled aggregate substitution ratios.On the basis of the experiments,load-carrying capacity,stiffness and its deterioration process,hysteretic loop,ductility,energy dissipation,failure patterns are analyzed.A practical calculation method of load-carrying capacity based on concrete strength reduction is proposed.The researched results show that the elastic modulus of concrete significantly are reduced,with the replacement ratios of recycled aggeregate are increased,the initial stiffness of the specimens significant is dropped,a downtrend of the load-carrying capacities is shown,the energy dissipation values are decreased,a downtrend of the seismic behavior also is shown.Recycled concrete can be used for multistory aseismic structure columns with low axial compression ratio.

关 键 词：再生混凝土 柱 抗震性能 试验研究 

分 类 号：TU375[建筑科学—结构工程] P315.97[天文地球—地震学]