预应力钢绞线索断裂冲击试验与冲击响应谱研究
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摘要
通过选取实际工程结构中的1×7结构钢绞线索进行断裂冲击试验,拟获得对应的索力时程曲线以及钢绞线索的断裂现象和失效机理,并为冲击响应谱的计算作铺垫.首先通过对无损钢绞线索进行动态拉伸,得到钢绞线索的断索情况以及对应的索力值,并计算出每根钢绞线索的失效时间,再将失效时间作为谱分析中的冲击持时,计算冲击响应谱.最终得到了5根钢绞线索的断裂过程以及相应的断索参数.结果表明钢绞线索的失效时间不随外在条件的改变而改变,但失效时间对最大位移反应谱有较大影响,而对断索冲击响应谱几乎不产生影响.
In this paper,the 1 × 7 structural steel strands used in engineering structure,have been selected for the fracture shock test to obtain the corresponding time-history curves of the cable force,as well as the fracture phenomena and failure mechanism of the steel strand,which finally paves the way for calculating the shock response spectrum. Firstly,five undamaged steel strands were tested under dynamic tension to measure the cable force value and calculate the failure response. Secondly,the failure time of each steel strand was calculated.Thirdly,the failure time was carried into the impact procedure for the shock response spectrum analysis. Finally,the rupture process of five steel strands and its corresponding parameters were obtained. The results show that the failure time of the steel strands does not change with the external conditions,but the failure time has a great influence on the maximum displacement response spectrum and less influence on the shock response spectrum.
In this paper,the 1 × 7 structural steel strands used in engineering structure,have been selected for the fracture shock test to obtain the corresponding time-history curves of the cable force,as well as the fracture phenomena and failure mechanism of the steel strand,which finally paves the way for calculating the shock response spectrum. Firstly,five undamaged steel strands were tested under dynamic tension to measure the cable force value and calculate the failure response. Secondly,the failure time of each steel strand was calculated.Thirdly,the failure time was carried into the impact procedure for the shock response spectrum analysis. Finally,the rupture process of five steel strands and its corresponding parameters were obtained. The results show that the failure time of the steel strands does not change with the external conditions,but the failure time has a great influence on the maximum displacement response spectrum and less influence on the shock response spectrum.
引文
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[17]R克拉夫,J彭津.结构动力学[M].北京:高等教育出版社,2006.
[2]蒋明,陆荣庆,尚春来,等.预应力钢绞线拉伸实验研究[J].苏州科技学院学报(工程技术版),2007,20(4):20-22.DOI:10.3969/j.issn.1672-0679.2007.04.005.JIANG Ming,LU Rongqing,SHANG Chunlai,et al.Research on testing of pre-stressed steel strand stretching[J].Journal of University of Science and Technology of Suzhou(Engineering and Technology),2007,20(4):20-22.DOI:10.3969/j.issn.1672-0679.2007.04.005.(in Chinese)
[3]唐柏鉴,阮含婷,顾盛.预应力技术在钢结构抗侧体系中的创新与研究[J].江苏科技大学学报(自然科学版),2010,24(6):539-544.DOI:10.3969/j.issn.1673-4807.2010.06.004.TANG Baijian,RUAN Hanting,GU Sheng.Inovation and research of prestress technology in lateral system of steel structures[J].Journal of Jiangsu University of Science and Technology(Natural Science Edition),2010,24(6):539-544.DOI:10.3969/j.issn.1673-4807.2010.06.004.(in Chinese)
[4]STEVENS D,CROWDER B,HALL B,et al.Unified progressive collapse design requirements for DOD and GSA[C]∥Structures Congress.Vancouver,British Columbia,Canada:[s.n.],2008:1-10.
[5]MOZOS C M,APARICIO A C.Numerical and experimental study on the interaction cable structure during the failure of a stay in a cable stayed bridge[J].Engineering Structures,2011,33(8):2330-2341.DOI:10.1016/j.engstruct.2011.04.006.
[6]MONTOYA A,WAISMAN H,BETTI R.A simplified contact-friction methodology for modeling wire breaks in parallel wire strands[J].Computers&Structures,2012,100-101:39-53.DOI:10.1016/j.compstruc.2012.03.003.
[7]JUDGE R,YANG Z,JONES S W,et al.Spiral strand cables subjected to high velocity fragment impact[J].International Journal of Impact Engineering,2017,107:58-79.DOI:10.1016/j.ijimpeng.2017.04.026.
[8]ABDULLAH A B M,RICE J A,HAMILTON H R,et al.An investigation on stressing and breakage response of a prestressing strand using an efficient finite element model[J].Engineering Structures,2016,123:213-224.DOI:10.1016/j.engstruct.2016.05.030.
[9]宗钟凌,张晋,蒋德稳,等.高温后1860级钢绞线力学性能试验研究[J].消防科学与技术,2015(3):311-314.DOI:10.3969/j.issn.1009-0029.2015.03.010.ZONG Zhongling,ZHANG Jin,JIANG Dewen,et al.Experimental research on the mechanical properties of steel strand(fptk=1 860 n/mm2)at elevated temperature[J].Fire Science and Technology,2015(3):311-314.DOI:10.3969/j.issn.1009-0029.2015.03.010.(in Chinese)
[10]张继祥,朱明,高波,等.高温受热后82B预应力钢绞线力学性能退化规律研究[J].上海金属,2013,35(3):12-15.DOI:10.3969/j.issn.1001-7208.2013.03.003.ZHANG Jixiang,ZHU Ming,Gao Bo,et al.Research on mechanical property deterioration of 82B prestressed steel strand post high temperature[J].Shanghai Metals,2013,35(3):12-15.DOI:10.3969/j.issn.1001-7208.2013.03.003.(in Chinese)
[11]宗钟凌,何永福,李世歌.基于高温下钢绞线力学性能的预应力钢结构抗火分析[J].四川建筑科学研究,2013,39(5):47-51.DOI:10.3969/j.issn.1008-1933.2013.05.012.ZONG Zhongling,HE Yongfu,LI Shige.Analysis of the fire-resistance of prestressed steel structure based on mechanical properties of steel strands under the high temperature[J].Sichuan Building Science,2013,39(5):47-51.DOI:10.3969/j.issn.1008-1933.2013.05.012.(in Chinese)
[12]范进.高温后预应力钢绞线性能的试验研究[J].南京理工大学学报(自然科学版),2004,28(2):186-189.DOI:10.3969/j.issn.1005-9830.2004.02.018.FAN Jin.Experimental study on material properties of prestressed steel strand post high temperatures[J].Journal of Nanjing University of Science and Technology(Natural Science),2004,28(2):186-189.DOI:10.3969/j.issn.1005-9830.2004.02.018.(in Chinese)
[13]张昊宇,郑文忠.1860级低松弛钢绞线高温下力学性能[J].哈尔滨工业大学学报,2007,39(6):861-865.DOI:10.3321/j.issn:0367-6234.2007.06.006.ZHANG Haoyu,ZHENG Wenzhong.Mechanical property of steel strand at high temperature[J].Journal of Harbin Institute of Technology,2007,39(6):861-865.DOI:10.3321/j.issn:0367-6234.2007.06.006.(in Chinese)
[14]付广龙,黄跃平,胥明.钢绞线拉伸真实全曲线测定方法的研究[J].工程与试验,2006,46(1):31-34.DOI:10.3969/j.issn.1674-3407.2006.01.008.FU Guanglong,HUANG Yueping,XU ming.Research on actual entire curve testing method of steel strand stretching[J].Test Technology and Testing Mechine,2006,46(1):31-34.DOI:10.3969/j.issn.1674-3407.2006.01.008.(in Chinese)
[15]张小鹏,王象良,邢怀念,等.预应力钢绞线力学性能试验研究[J].金属制品,2016,42(3):1-5.DOI:10.3969/j.issn.1003-4226.2016.03.001.ZHANG Xiaopeng,WANG Xiangliang,XING Huainian,et al.Experimental research on mechanical properties of prestressing steel strand[J].Steel Wire Products,2016,42(3):1-5.DOI:10.3969/j.issn.1003-4226.2016.03.001.(in Chinese)
[16]马伟杰,单继安,费汉兵.环氧涂层预应力钢绞线性能对比研究[J].金属制品,2014,40(1):54-58.DOI:10.3969/j.issn.1003-4226.2014.01.014.MA Weijie,SHAN Jian,FEI Hanbing.Research of epoxy coated prestressed steel strand property comparison[J].Steel Wire Products,2014,40(1):54-58.DOI:10.3969/j.issn.1003-4226.2014.01.014.(in Chinese)
[17]R克拉夫,J彭津.结构动力学[M].北京:高等教育出版社,2006.