Reliability analysis method of accelerated life test of concrete in saline soil area

doi:10.11817/j.issn.1672-7207.2021.03.032

IR > 理学院

	Reliability analysis method of accelerated life test of concrete in saline soil area
	Lu, Chenggong 1; Wei, Zhiqiang2 ; Qiao, Hongxia1 ; Qiao, Guobin 1; Zhu, Binrong 3
	2021-03-26
发表期刊	Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
ISSN	1672-7207
卷号	52 期号:3 页码:1017-1026
摘要	In order to more accurately and reasonably evaluate the durability and service life of concrete in western saline soil area, an indoor accelerated life test was designed to simulate the coupling effect of the four-season damage factor in the saline soil area. Damage factors included compound salt erosion, dry-wet cycle, freeze-thaw damage and solar radiation. The Gamma distribution, two-parameter Weibull distribution and three-parameter Weibull distribution function were selected respectively for modeling. Prior hypothesis test was conducted through the probability graph. The maximum likelihood method and correlation coefficient optimization method were used for parameter estimation. Based on reliability life curve, density curve and failure rate curve, the reliability of concrete under the coupling action of multiple damage factors was evaluated comprehensively. The results show that Gamma distributions and Weibull distributions have high fitting accuracy for the samples of concrete accelerated life data. The reliability curve of three-parameter Weibull distribution is faster in transition stage, and the symmetry of density curve is not strong. The Gamma distribution is the closest to the reliability of the two-parameter Weibull distribution model. The reliability curve is smoother in the transition stage, the density curve is more symmetrical, and the failure rate curve increases at a faster rate in the later stage. Among the three types of distribution models, two parameter Weibull distribution has the shortest time and the lowest reliability life in the first stage, and the failure rate increases in power-law form in the later stage. Two-parameter Weibull distribution model is more consistent with the deterioration law of concrete under the comprehensive action of multiple damage factors. Considering the difficulty of parameter estimation in the three-parameter Weibull distribution model, the durability life of concrete can be directly evaluated by two-parameter Weibull distribution model. When the reliability level is 0.4, the reliability life is the closest to the accelerated life of concrete, and reliability is taken as the end symbol of the concrete life under the coupling action of multiple damage factors of saline soil. © 2021, Central South University Press. All right reserved.
关键词	Concrete testing Deterioration Distribution functions Durability Failure analysis Grain size and shape Maximum likelihood estimation Outages Parameter estimation Reliability analysis Soils Accelerated life tests Correlation coefficient optimization methods Distribution models Freeze-thaw damage Maximum likelihood methods Multiple damage factors Reliability analysis method Three parameter Weibull distribution
DOI	10.11817/j.issn.1672-7207.2021.03.032
收录类别	EI
语种	中文
出版者	Central South University of Technology
EI入藏号	20211710250563
EI主题词	Weibull distribution
EI分类号	412 Concrete ; 483.1 Soils and Soil Mechanics ; 706.1 Electric Power Systems ; 922 Statistical Methods ; 951 Materials Science
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/148442
专题	理学院土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Civil Engineering, Southeast China University, Nanjing; 211189, China
第一作者单位	土木工程学院
第一作者的第一单位	土木工程学院
推荐引用方式 GB/T 7714	Lu, Chenggong,Wei, Zhiqiang,Qiao, Hongxia,et al. Reliability analysis method of accelerated life test of concrete in saline soil area[J]. Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology),2021,52(3):1017-1026.
APA	Lu, Chenggong,Wei, Zhiqiang,Qiao, Hongxia,Qiao, Guobin,&Zhu, Binrong.(2021).Reliability analysis method of accelerated life test of concrete in saline soil area.Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology),52(3),1017-1026.
MLA	Lu, Chenggong,et al."Reliability analysis method of accelerated life test of concrete in saline soil area".Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) 52.3(2021):1017-1026.