| 一个可靠指标计算公式的误差分析 |
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| 引用本文： | 周建方,周军.一个可靠指标计算公式的误差分析[J].河海大学常州分校学报,2007,21(1):22-24. |
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| 作者姓名： | 周建方 周军 |
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| 作者单位： | 河海大学,机电工程学院,江苏,常州,213022 |
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| 摘 要： | 对美国桥梁设计规范中计算可靠指标的一个公式进行分析,认为该公式是近似的,并指出了其近似的原因。分别采用该公式和蒙特卡罗法计算可靠指标,计算结果表明该公式的误差高达30%,远远超出工程容许范围。因此在工程上应用该公式进行可靠指标计算是不合适的。
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| 关 键 词： | 可靠指标 误差分析 对数正态分布 |
| 文章编号： | 1009-1130（2007）01-0022-03 |
| 修稿时间： | 2006-04-04 |
Error Analysis of a Formula for Calculating Reliability Index |
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| ZHOU Jian-fang,ZHOU Jun.Error Analysis of a Formula for Calculating Reliability Index[J].Journal of Hohai University Changzhou,2007,21(1):22-24. |
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| Authors: | ZHOU Jian-fang ZHOU Jun |
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| Abstract: | A formula,adopted by the American Bridge Design Specifications,for calculating reliability index is analyzed.It is found that the formula is approximate.The reasons for errors of the formula are pointed out.Compared with the Monte Carlo Method,the formula gives the value of the reliability with an error up to 30% which goes far beyond the allowed engineering scope.Therefore the formula is not applicable to engineering. |
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| Keywords: | reliability index error analysis lognormal distribution |
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