三参数Weibull分布的多因素作用下混凝土加速寿命试验
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摘要
针对中国西部盐渍土地区混凝土耐久性较差的突出问题,设计了模拟自然环境的室内混凝土加速寿命试验,其中包括盐卤腐蚀、干湿循环、冻融循环和太阳辐射。采用动弹性模量作为评价混凝土耐久性失效阈值,得到混凝土加速寿命数据。基于三参数Weibull分布,运用概率分析软件对寿命数据进行分析预测,得到加速寿命分布概要图。结果表明,三参数Weibull分布能够很好地拟合加速寿命数据样本点;其阈值参数可直观反映混凝土开始退化失效的时间;其分布概要图可直观反映加速退化过程中的可靠性,从而为混凝土耐久性评估提供新的可靠性依据。
Aiming at the extrusive problem of poor durability of concrete in saline soil area of western China,the indoor accelerated life test of concrete was designed to simulate natural environment,including halide corrosion,wet and dry cycle,freeze-thaw cycle and solar radiation. The dynamic modulus of elasticity was adopted as the to failure threshold to evaluate the durability of concrete,and the accelerated life data of concrete were obtained. Based on the three-parameter Weibull distribution,the probability analysis software was employed to analyze and predict the life data,and the distribution overview plot-arbitrary cens of accelerated life was acquired. It could be found from the results that the sample points of accelerated life data could be well fitted by three-parameter Weibull distribution. Moreover,the failure time of concrete durability degradation and reliability of accelerated degradation process could be directly reflected by its threshold parameter and distribution overview plot-arbitrary cens,respectively,which provides a novel reliability basis for durability evaluation of concrete.
Aiming at the extrusive problem of poor durability of concrete in saline soil area of western China,the indoor accelerated life test of concrete was designed to simulate natural environment,including halide corrosion,wet and dry cycle,freeze-thaw cycle and solar radiation. The dynamic modulus of elasticity was adopted as the to failure threshold to evaluate the durability of concrete,and the accelerated life data of concrete were obtained. Based on the three-parameter Weibull distribution,the probability analysis software was employed to analyze and predict the life data,and the distribution overview plot-arbitrary cens of accelerated life was acquired. It could be found from the results that the sample points of accelerated life data could be well fitted by three-parameter Weibull distribution. Moreover,the failure time of concrete durability degradation and reliability of accelerated degradation process could be directly reflected by its threshold parameter and distribution overview plot-arbitrary cens,respectively,which provides a novel reliability basis for durability evaluation of concrete.
引文
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2 Omrane M,Kenai S,Kadri E H,et al.Journal of Cleaner Production,2017,165,415.
3 Afroughsabet V,Biolzi L,Ozbakkaloglu T.Composite Structures,2017,181,1124.
4 Wang J,Ersan Y C,Boon N,et al.Applied Microbiology&Biotechnology,2016,100(7),2993.
5 Yang L F,Zhou M,Chen Z.Journal of Civil Engineering,2014(10),70(in Chinese).杨绿峰,周明,陈正.土木工程学报,2014(10),70.
6 Ta V L,Bonnet S,Kiesse T S,et al.Construction&Building Materials,2016,129,172.
7 Demis S,Efstathiou M P,Papadakis V G.Cement&Concrete Composites,2014,47(3),9.
8 Van B B,Van d H P,Van T K,et al.Materials,2016,10(1),5.
9 Kuosa H,Ferreira R M,Holt E,et al.Cement&Concrete Composites,2014,47(47),32.
10 Ryan P C,O'Connor A J.Construction&Building Materials,2013,47(10),1106.
11 Jin Z,Zhao X,Zhao T,et al.Journal of Advanced Concrete Technology,2016,14(4),172.
12 Kashani M M,Crewe A J,Alexander N A.Corrosion Science,2013,73(13),208.
13 Gan Z W,Jin W L,Gao M Z.Journal of Building Structures,2011,32(2),41(in Chinese).干伟忠,金伟良,高明赞.建筑结构学报,2011,32(2),41.
14 Zou F,Tan H,Guo Y,et al.Journal of Industrial&Engineering Chemistry,2017,55(80),91.
15 Develi I,Kabalci Y.Journal of Applied Research&Technology,2016,14(2),101.
16 Bilim M,Kapucu N,Develi I.Iet Communications,2017,11(7),993.
17 Yin Z G,Feng J,Huang S Y,et al.Applied Mechanics&Materials,2014,584-586,1626.
18 Nie Y F,Qian C X.Journal of Southeast University(Natural Science Edition),2013,43(3),594(in Chinese).聂彦锋,钱春香.东南大学学报(自然科学版),2013,43(3),594.
19 Qiao H X,Zhu B R,Lu C G.Journal of Building Materials,2017,20(2),191(in Chinese).乔宏霞,朱彬荣,路承功.建筑材料学报,2017,20(2),191.
20 Foy C,Pigeon M,Banthia N.Cement&Concrete Research,1988,18(4),604.
21 Wang K,Nelsen D E,Nixon W A.Cement&Concrete Composites,2006,28(2),173.
22 Sotiriadis K,Nikolopoulou E,Tsivilis S.Cement&Concrete Composites,2012,34(8),903.
23 Lei G.Parameter estimation of Weibull distribution life data.Ph.D.Thesis,Huazhong University of Science and Technology(HUST),China,2006(in Chinese).雷刚.Weibull分布寿命数据的参数估计.博士学位论文,华中科技大学,2006.
24 Deng F F.MATLAB R2015b probability and mathematical statistics,Tsinghua University Press,China,2010(in Chinese).邓奋发.MATLAB R2015b概率与数理统计,清华大学出版社,2017.
25 Ma F S.Modern practical statistics based on MINITAB,China Renmin U-niversity Press,China,2014(in Chinese).马逢时.基于MINITAB的现代实用统计,中国人民大学出版社,2014.