HRB500与HRB400钢筋疲劳性能对比试验研究
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摘要
为对比HRB500与HRB400钢筋的疲劳性能,本文对两种钢筋进行了对称循环荷载下的轴向拉压疲劳试验。在此基础上,以Theil不等系数u和相关参数p作为精度评价指标,确定了适用于两种钢筋的威布尔分布三参数估计方法和失效概率模型,得到了HRB500和HRB400钢筋标准试件不同可靠指标下的疲劳寿命预测值,并最终建立了HRB500与HRB400钢筋中值S-N曲线和适用于高速铁路无砟轨道可靠指标为4.2的S-N曲线。研究结果表明:(1)在对HRB500和HRB400钢筋疲劳寿命三参数威布尔分布进行参数估计时,灰色预测法的精度最高;(2)HRB500钢筋在1亿次荷载循环内的疲劳性能与HRB400钢筋相比具有较为明显的优势。但随着荷载循环次数的增加,HRB500对HRB400钢筋在疲劳性能方面的优势逐渐减小。本文的研究成果可为HRB500和HRB400钢筋在高速铁路无砟轨道或其他承受高周疲劳荷载工程结构物中的选择使用提供试验依据。
In this paper,in order to compare the fatigue performance between HRB500 and HRB400 reinforcing bars,the axial tension and compression fatigue experiments for their standard specimens under symmetrical cyclic loading were carried out.On this basis,the estimation method and failure probability model of three-parameter Weibull distribution parameters for fatigue life of standard specimens of HRB500 and HRB400 reinforcing bar were determined by using the relative parameters p and Theil unequal coefficient u as the evaluation index of accuracy estimation,then the fatigue life prediction values of HRB500 and HRB400 reinforcing bar standard specimens were obtained under the condition of different reliability indexes.Finally,the median stress amplitude(S)versus number of cycles(N)to failure(S-Ncurves)of HRB500 and HRB400 reinforcing bar and S-Ncurve suitable for high-speed railway with ballastless track reliability index of 4.2 were established.Results show that(1)The grey prediction can obtain higher estimation accuracy when estimating parameters of three-parameter Weibull distribution applicable to fatigue life of standard specimens of HRB500 and HRB400 reinforcing bar;(2)The fatigue performance of HRB500 reinforcing bar below 100 million cycles has obvious advantages compared with HRB400 reinforcing bar.However,with the increase of cycles,the fatigue performance advantage of HRB500 over HRB400 reinforcing bar decreases gradually.Above results can provide experimental basis for the choice of HRB500 and HRB400 reinforcing bar used in ballastless track of high-speed railway or other engineering structures under high cycle fatigue loads.
In this paper,in order to compare the fatigue performance between HRB500 and HRB400 reinforcing bars,the axial tension and compression fatigue experiments for their standard specimens under symmetrical cyclic loading were carried out.On this basis,the estimation method and failure probability model of three-parameter Weibull distribution parameters for fatigue life of standard specimens of HRB500 and HRB400 reinforcing bar were determined by using the relative parameters p and Theil unequal coefficient u as the evaluation index of accuracy estimation,then the fatigue life prediction values of HRB500 and HRB400 reinforcing bar standard specimens were obtained under the condition of different reliability indexes.Finally,the median stress amplitude(S)versus number of cycles(N)to failure(S-Ncurves)of HRB500 and HRB400 reinforcing bar and S-Ncurve suitable for high-speed railway with ballastless track reliability index of 4.2 were established.Results show that(1)The grey prediction can obtain higher estimation accuracy when estimating parameters of three-parameter Weibull distribution applicable to fatigue life of standard specimens of HRB500 and HRB400 reinforcing bar;(2)The fatigue performance of HRB500 reinforcing bar below 100 million cycles has obvious advantages compared with HRB400 reinforcing bar.However,with the increase of cycles,the fatigue performance advantage of HRB500 over HRB400 reinforcing bar decreases gradually.Above results can provide experimental basis for the choice of HRB500 and HRB400 reinforcing bar used in ballastless track of high-speed railway or other engineering structures under high cycle fatigue loads.
引文
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[2]张耀庭,赵璧归,李瑞鸽,等.HRB400钢筋单调拉伸及低周疲劳性能试验研究[J].工程力学,2016,33(4):121-129(ZHANG Yaoting,ZHAO Bigui,LI Ruige,et al.Monotonic and low cycle fatigue testing and research for HRB400steel[J].Engineering Mechanics,2016,33(4):121-129(in Chinese))
[3]陆鹏雁,刘煜,吴华杰,等.HRB500高强钢筋拉压疲劳性能研究及断口分析[J].机械强度,2015,37(2):248-253(LU Pengyan,LIU Yu,WU Huajie,et al.Research on tesion fatigue performance of HRB500high strength rebar and fractography anslysis[J].Mechanical Strength,2015,37(2):248-253(in Chinese))
[4]张少华,王起才,张戎令,等.16mm HRB(F)500级高强钢筋疲劳性能研究[J].工业建筑,2017,47(6):40-43(ZHANG Shaohua,WANG Qicai,ZHANG Rongling,et al.Research on fatigue performance of 16 millimeter HRB(F)500high strength reinforced bar[J].Engineering Constructure,2017,47(6):40-43(in Chinese))
[5]孙嘉,王硕,刘鹏翔,等.400MPa级细晶高强钢筋的疲劳S-N曲线研究[J].工业建筑,2014,44(S1):951-953(SUN Jia,WANG Shuo,LIU Pengxiang,et al.Investigation of fatigue S-Ncurves on 400MPa fine-grained high strength rebar[J].Industrial Construction,2014,44(S1):951-953(in Chinese))
[6] Lv Y K,Sheng G M,Xue H F,et al.High strain low cycle fatigue and anti-seismic behavior of HRB400QST reinforced steel bars[J].Advanced Materials Research,2011,250-253:1128-1133.
[7] GB/T 228.1-2010.金属材料拉伸实验第1部分:室温试验方法[S].北京:中国标准出版社,2010(GB/T228.1-2010.Metallic materials-Tensile testing-Part 1:Method of test at room temperature[S].Beijing:Standards Press of China,2010(in Chinese))
[8] GB/T 3075-2008.金属材料疲劳试验轴向力控制方法[S].北京:中国标准出版社,2008(GB/T 3075-2008.Metallic materials-Fatigue testing-Axial-force-controlled-method[S].Beijing:Standards Press of China,2008(in Chinese))
[9] Basquin O H.The exponential law of endurance tests[M].American Society for Testing and Materials Proceedings,1910,10:625-630.
[10]朱学旺,刘青林.随机振动载荷动力学等效的一种工程实现方法[J].实验力学,2007(6):568-574(ZHU Xuewang,LIU Qinglin.On equivalent simulation of random vibration excitation dynamics in engineering[J].Journal of Experimental Mechanics,2007(6):568-574(in Chinese))
[11]李晓雨.三参数Weibull分布参数估计方法研究[D].北京交通大学,2012(LI Xiaoyu.Reseach on estimation of the three parameter Weibull distribution[D].Beijing Jiaotong University,2012(in Chinese))
[12] Henri T.Economics and information theory[M].Amsterdam:North-Holland Publishing Co,1967.
[13]郑荣跃,秦子增.Weibull分布参数估计的灰色方法[J].强度与环境,1989(2):34-40(ZHENG Rongyue,QIN Zizeng.Grey method for parameter estimation of Weibull distribution[J].Structure&Environment Engineering,1989(2):34-40(in Chinese))
[14]宋玉普.混凝土结构的疲劳性能及设计原理[M].北京:机械工业出版社,2006(SONG Yupu.Fatigue behavior and design principle of concrete structures[M].Beijing:China Machine Press,2006(in Chinese))
[15] ECCS Technical Committee 6-Fatigue.Recommendations for the fatigue design of steel structures(1st edition)[S].Brussels:European Convention for Constructional Steelwork,1985.
[2]张耀庭,赵璧归,李瑞鸽,等.HRB400钢筋单调拉伸及低周疲劳性能试验研究[J].工程力学,2016,33(4):121-129(ZHANG Yaoting,ZHAO Bigui,LI Ruige,et al.Monotonic and low cycle fatigue testing and research for HRB400steel[J].Engineering Mechanics,2016,33(4):121-129(in Chinese))
[3]陆鹏雁,刘煜,吴华杰,等.HRB500高强钢筋拉压疲劳性能研究及断口分析[J].机械强度,2015,37(2):248-253(LU Pengyan,LIU Yu,WU Huajie,et al.Research on tesion fatigue performance of HRB500high strength rebar and fractography anslysis[J].Mechanical Strength,2015,37(2):248-253(in Chinese))
[4]张少华,王起才,张戎令,等.16mm HRB(F)500级高强钢筋疲劳性能研究[J].工业建筑,2017,47(6):40-43(ZHANG Shaohua,WANG Qicai,ZHANG Rongling,et al.Research on fatigue performance of 16 millimeter HRB(F)500high strength reinforced bar[J].Engineering Constructure,2017,47(6):40-43(in Chinese))
[5]孙嘉,王硕,刘鹏翔,等.400MPa级细晶高强钢筋的疲劳S-N曲线研究[J].工业建筑,2014,44(S1):951-953(SUN Jia,WANG Shuo,LIU Pengxiang,et al.Investigation of fatigue S-Ncurves on 400MPa fine-grained high strength rebar[J].Industrial Construction,2014,44(S1):951-953(in Chinese))
[6] Lv Y K,Sheng G M,Xue H F,et al.High strain low cycle fatigue and anti-seismic behavior of HRB400QST reinforced steel bars[J].Advanced Materials Research,2011,250-253:1128-1133.
[7] GB/T 228.1-2010.金属材料拉伸实验第1部分:室温试验方法[S].北京:中国标准出版社,2010(GB/T228.1-2010.Metallic materials-Tensile testing-Part 1:Method of test at room temperature[S].Beijing:Standards Press of China,2010(in Chinese))
[8] GB/T 3075-2008.金属材料疲劳试验轴向力控制方法[S].北京:中国标准出版社,2008(GB/T 3075-2008.Metallic materials-Fatigue testing-Axial-force-controlled-method[S].Beijing:Standards Press of China,2008(in Chinese))
[9] Basquin O H.The exponential law of endurance tests[M].American Society for Testing and Materials Proceedings,1910,10:625-630.
[10]朱学旺,刘青林.随机振动载荷动力学等效的一种工程实现方法[J].实验力学,2007(6):568-574(ZHU Xuewang,LIU Qinglin.On equivalent simulation of random vibration excitation dynamics in engineering[J].Journal of Experimental Mechanics,2007(6):568-574(in Chinese))
[11]李晓雨.三参数Weibull分布参数估计方法研究[D].北京交通大学,2012(LI Xiaoyu.Reseach on estimation of the three parameter Weibull distribution[D].Beijing Jiaotong University,2012(in Chinese))
[12] Henri T.Economics and information theory[M].Amsterdam:North-Holland Publishing Co,1967.
[13]郑荣跃,秦子增.Weibull分布参数估计的灰色方法[J].强度与环境,1989(2):34-40(ZHENG Rongyue,QIN Zizeng.Grey method for parameter estimation of Weibull distribution[J].Structure&Environment Engineering,1989(2):34-40(in Chinese))
[14]宋玉普.混凝土结构的疲劳性能及设计原理[M].北京:机械工业出版社,2006(SONG Yupu.Fatigue behavior and design principle of concrete structures[M].Beijing:China Machine Press,2006(in Chinese))
[15] ECCS Technical Committee 6-Fatigue.Recommendations for the fatigue design of steel structures(1st edition)[S].Brussels:European Convention for Constructional Steelwork,1985.