橋梁工程質(zhì)量評(píng)定的可靠性分析-在線瀏覽
2024-08-05 11:57本頁(yè)面
【正文】 elopment of traffic in China, a large number of bridge construction projects being started in the vast land of China. Quality control and evaluation engineers of bridge during the construction bee an issue of growing concern in the mon project quality on the estimated methods of mathematical statistics，a sample of a bridge engineering quality reliability analysis methodhas be used, this method is more suitable in evaluation of the projects’ quality, which can reduce the assessment work in the past subjective wishes, and the oute of the assessment could increase objectivity and reliability.Key words: Bridge engineering，Assessment of quality，Reliability，Samples 現(xiàn)行橋梁質(zhì)量評(píng)定方法中，都是利用樣本抽樣的統(tǒng)計(jì)數(shù)量來(lái)推斷整個(gè)工程質(zhì)量即母體的質(zhì)量情況，這就存在一個(gè)問(wèn)題，即利用樣本的統(tǒng)計(jì)質(zhì)量特征來(lái)估計(jì)推斷母體的質(zhì)量特征的可靠性問(wèn)題。這種分析思路符合數(shù)理統(tǒng)計(jì)的思想，以此為基本出發(fā)點(diǎn)，利用數(shù)理統(tǒng)計(jì)的樣本估計(jì)，以95%的可靠程度對(duì)橋梁工程質(zhì)量進(jìn)行可靠性分析，能夠反映工程質(zhì)量的實(shí)際情況?？梢蓴?shù)據(jù)的取舍方法常用的有拉依達(dá)法、肖維納特法、格拉布斯法等。拉依達(dá)法的基本思路是:當(dāng)試驗(yàn)次數(shù)較多時(shí)，可簡(jiǎn)單地用3倍標(biāo)準(zhǔn)差(3S)作為確定可疑數(shù)據(jù)取舍的標(biāo)準(zhǔn)。)與其測(cè)量結(jié)果的平均值(X )之差大于3倍標(biāo)準(zhǔn)差時(shí)，用公式表示為：︱xix︳＞3S則該測(cè)量數(shù)據(jù)應(yīng)當(dāng)舍棄。 在數(shù)理統(tǒng)計(jì)中，n50為小樣本。
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