高温后方钢管再生混凝土柱抗震性能试验研究
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摘要
本文进行了6个高温后方钢管再生混凝土柱试件和1个常温对比试件的拟静力试验,研究再生粗骨料取代率、受热温度和套箍指数对试件表观变化、破坏形态和抗震性能的影响。结果表明:高温后钢管表面氧化而呈现暗红色;在常温和高温作用下的试件破坏形态相似,均为钢管底部发生鼓曲破坏;除套箍指标较小的试件外,所有试件的滞回曲线比较饱满,变形满足抗震延性需求;上述这些受再生粗骨料取代率的影响不大,而受热温度影响显著,其中受热温度300℃时的损伤严重、性能劣化最为突出。
In this paper,aquasi-static experiment was carried out for 6 recycled aggregate concrete filled steel tubular columns which were subjected to high temperature treatment and 1 contrastive specimen which was in normal temperature environment.The purpose is to study the effect of replacement rate of recycled coarse aggregate,heating temperature and hoop index on the apparent change,failure pattern and seismic performance of specimens.Experimental results show that the surface of tubular columns is oxidized and appears dark red after high temperature treatment;the failure patterns of all specimens are similar no matter what at room temperature and high temperature,both are caused by bulging failure at the bottom of the steel tube;the hysteretic curves of all specimens except for the specimen with small hoop index are plump,and the deformation can meet the requirements of seismic ductility;above these are not affected by the replacement rate of recycled coarse aggregate,but obviously by the heating temperature,among which,the damage is serious and the performance degradation is the most serious at 300℃.
In this paper,aquasi-static experiment was carried out for 6 recycled aggregate concrete filled steel tubular columns which were subjected to high temperature treatment and 1 contrastive specimen which was in normal temperature environment.The purpose is to study the effect of replacement rate of recycled coarse aggregate,heating temperature and hoop index on the apparent change,failure pattern and seismic performance of specimens.Experimental results show that the surface of tubular columns is oxidized and appears dark red after high temperature treatment;the failure patterns of all specimens are similar no matter what at room temperature and high temperature,both are caused by bulging failure at the bottom of the steel tube;the hysteretic curves of all specimens except for the specimen with small hoop index are plump,and the deformation can meet the requirements of seismic ductility;above these are not affected by the replacement rate of recycled coarse aggregate,but obviously by the heating temperature,among which,the damage is serious and the performance degradation is the most serious at 300℃.
引文
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[14]陈宗平,叶培欢,薛建阳,等.高温后方钢管再生混凝土轴压短柱的受力性能研究[J].工业建筑,2014,44(11):13-18(CHEN Zongping,YE Peihuan,XUE Jianyang,et al.Mechanical behavior of square steel tube short columns filled with recycled aggregate concrete under axial compression after high temperature[J].Industrial Construction,2014,44(11):13-18(in Chinese))
[15]陈宗平,周文祥,薛建阳,等.高温后方钢管再生混凝土偏压柱受力性能试验[J].工业建筑,2014,44(11):25-31,57(CHEN Zongping,ZHOU Wenxiang,XUE Jianyang,et al.Test of recycled aggregate concrete filled square steel tube column subjected to eccentric compression after high temperature[J].Industrial Construction,2014,44(11):25-31,57(in Chinese))
[2]邱慈长,王清远,石宵爽,等.薄壁钢管再生混凝土轴压实验研究[J].实验力学,2011,26(1):8-15(QIUCichang,WANG Qingyuan,SHI Xiaoshuang,et al.Experimental investigation on the behavior of recycle concrete-filled thin-walled steel tube under axial compression[J].Journal of Experimental Mechanics,2011,26(1):8-15(in Chinese))
[3]柯晓军,陈宗平,薛建阳,等.方钢管再生混凝土短柱轴压承载性能试验研究[J].工程力学,2013,30(8):35-41(KE Xiaojun,CHEN Zongping,XUE Jianyang,et al.Experimental study on the bearing capacity of recycled aggregate concrete-filled square steel tube short columns under axial compression[J].Engineering Mechanics,2013,30(8):35-41(in Chinese))
[4]陈宗平,徐金俊,薛建阳.取代率对钢管再生混凝土短柱轴压性能退化的影响分析[J].实验力学,2014,29(2):207-214(CHEN Zongping,XU Jinjun,XUE Jianyang.Influence of replacement ratio on axial compression performance degradation of recycled aggregate concrete-filled steel tube short column[J].Journal of Experimental Mechanics,2014,29(2):207-214(in Chinese))
[5]黄宏,朱彦奇,陈梦成,等.矩形中空夹层再生混凝土钢管短柱轴压试验研究[J].实验力学,2016,31(1):67-74(HUANG Hong,ZHU Yanqi,CHEN Mengcheng,et al.Experimental investigation on axial compression of rectangular recycled concrete-filled double-skin steel tube short column[J].Journal of Experimental Mechanics,2016,31(1):67-74(in Chinese))
[6]蔡传国,韦忠瑄,杨绪普.方钢管混凝土柱延性的实验研究[J].实验力学,2013,28(1):101-108(CAIChuanguo,WEI Zhongxuan,YANG Xupu.An experimental study of ductility for concrete-filled square steel tubular column[J].Journal of Experimental Mechanics,2013,28(1):101-108(in Chinese))
[7]余志武,丁发兴.钢-混凝土组合结构抗火性能研究与应用[J].建筑结构学报,2010,31(6):96-109(YUZhiwu,DING Faxing.Fire performance research application steel-concrete composite structures[J].Journal of Building Structures,2010,31(6):96-109(in Chinese))
[8]林晓康,韩林海.火灾后圆钢管混凝土柱荷载-位移滞回性能研究[J].建筑结构学报,2005,26(3):19-29(LIN Xiaokang,HAN Linhai.Load-displacement hysteretic behavior of concrete filled CHS columns after exposure to ISO-834standard fire[J].Journal of Building Structures,2005,26(3):19-29(in Chinese))
[9]王广勇,谢福娣,张东明,等.火灾后型钢混凝土柱抗震性能试验及参数分析[J].土木工程学报,2015,48(7):60-70(WANG Guangyong,XIE Fudi,ZHANG Dongming,et al.Test and parametric analysis on post-fire seismic performance of steel reinforced concrete columns[J].China Civil Engineering Journal,2015,48(7):60-70(in Chinese))
[10]李俊华,陈建华,孙彬.高温后型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2015,36(5):124-132(LIJunhua,CHEN Jianhua,SUN Bin.Experimental study on seismic performance of steel reinforced concrete columns after exposure to fire[J].Journal of Building Structures,2015,36(5):124-132(in Chinese))
[11]Yang Youfu,Hou Rui.Experimental behaviour of RACFST stub columns after exposed to high temperatures[J].Thin-Walled Structures,2012,59(4):1-10.
[12]罗超宁,查晓雄.钢管再生混凝土柱耐火性能研究[J].建筑结构学报,2015,36(s2):35-41(LUO Chaoning,ZHA Xiaoxiong.Research on fire resistance of recycled concrete filled steel tubular columns[J].Journal of Building Structures,2015,36(s2):35-41(in Chinese))
[13]王兵,刘晓,赵磊,等.高温后方钢管再生混凝土短柱轴压受力性能分析[J].工程力学,2015,32(s1):153-158(WANG Bin,LIU Xiao,ZHAO Lei,et al.Mechanical analysis of recycled concrete filed in square steel tube after high-temperature under axial compression[J].Engineering Mechanics,2015,32(s1):153-158(in Chinese))
[14]陈宗平,叶培欢,薛建阳,等.高温后方钢管再生混凝土轴压短柱的受力性能研究[J].工业建筑,2014,44(11):13-18(CHEN Zongping,YE Peihuan,XUE Jianyang,et al.Mechanical behavior of square steel tube short columns filled with recycled aggregate concrete under axial compression after high temperature[J].Industrial Construction,2014,44(11):13-18(in Chinese))
[15]陈宗平,周文祥,薛建阳,等.高温后方钢管再生混凝土偏压柱受力性能试验[J].工业建筑,2014,44(11):25-31,57(CHEN Zongping,ZHOU Wenxiang,XUE Jianyang,et al.Test of recycled aggregate concrete filled square steel tube column subjected to eccentric compression after high temperature[J].Industrial Construction,2014,44(11):25-31,57(in Chinese))