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首页> 外文期刊>Environmental engineering and management journal >RELIABILITY MODEL FOR STORM SEWER
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RELIABILITY MODEL FOR STORM SEWER

机译：下水道可靠性模型

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摘要

Reliability model which can quantitatively calculate the probability of failure of storm sewer was developed in this study. Annual maximum rainfall intensities of six South-Korean cities were used to determine the statistical distribution for reliability model. From the results of reliability analysis, it was found that statistical distribution for the annual maximum rainfall intensities of six cities in Korea is well matched with Gumbel distribution. Rational equation was applied to determine the load of the storm sewer and Manning's and Darcy-Weisbach equations were applied to determine the capacity of storm sewer in reliability function. Reliability analysis was performed by calculation of probability of failure of storm sewer. It was assumed as the failure state if inflow is bigger than capacity of the storm sewer. Results of reliability analysis using Manning's and Darcy-Weisbach equations were compared and the probability of failure according to sewer diameter was calculated. Furthermore, the probability of failure of storm sewer located in Wonju and Chuncheon was calculated using the maximum rainfall intensity for 50-year return period. It was found that the probability of failure can be significantly increased if the sewer diameter is smaller than certain design value. Therefore, one of the best ways to reduce the probability of failure of storm sewer could be maintaining the original design diameter. Reliability model presented in this study can be applied to management, maintenance, and design of storm sewer.
机译：本研究建立了可以定量计算雨水管道故障概率的可靠性模型。利用韩国六个城市的年最大降雨强度确定可靠性模型的统计分布。从可靠性分析的结果中发现，韩国六个城市的年度最大降雨强度的统计分布与Gumbel分布非常吻合。应用有理方程确定雨水管道的负荷，并使用Manning和Darcy-Weisbach方程确定可靠性函数中的雨水管道容量。通过计算雨水管道故障的概率来进行可靠性分析。如果流入量大于雨水管道的容量，则假定为失效状态。比较了使用曼宁（Manning's）和达西-魏斯巴赫（Darcy-Weisbach）方程进行的可靠性分析的结果，并根据下水道直径计算了故障概率。此外，利用50年回归期的最大降雨强度计算了位于原州和春川的下水道的故障概率。已经发现，如果下水道直径小于某些设计值，则故障的可能性会大大增加。因此，降低雨水管道故障概率的最佳方法之一就是保持原始设计直径。本研究中提出的可靠性模型可以应用于雨水管道的管理，维护和设计。

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