The application of reliability analysis for the design of storm sewer

Hyuk Jae Kwon; Kyung Je Lee

doi:10.3741/JKWRA.2018.51.10.887

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2018 Vol.51, Issue 10 Preview Page Next Page

Research Article

The application of reliability analysis for the design of storm sewer 우수관의 설계를 위한 신뢰성해석기법의 적용

31 October 2018. pp. 887-893

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Abstract

In this study, the optimum design technology is suggested by using reliability analysis method. Nowadays, urban flood inundation is easily occurred because of local heavy rain. Traditional deterministic design method for storm sewer may underestimate the size of pipe. Therefore, stochastic method for the storm sewer design is necessary to solve this problem. In the present study, reliability model using FORM (First Order Reliability Method) was developed for the storm sewer. Developed model was applied to the real storm sewers of 5 different areas. Probability of exceeding capacity has been calculated and construction costs according to diameter have been compared. Probability of exceeding capacity of storm sewers of 5 areas have been calculated after estimating the return period of rainfall intensity.

Keywords

Storm sewer

Reliability analysis

Rainfall

Random variable

본 연구에서는 신뢰성해석기법을 이용하여 우수관에 대한 최적설계기법을 제시하였다. 최근 빈번히 일어나고 있는 국지성호우에 대해 기존의 결정론적 설계기법으로는 우수관의 용량을 초과하여 도시침수가 일어나기 쉽다. 이러한 문제를 해결하기 위해서는 우수관의 설계변수들을 확률변수로 인식하는 추계학적 기법이 필요하다. 이를 위해서 본 연구에서는 FORM (First Order Reliability Method)을 사용하여 우수관의 신뢰성해석모형을 개발하였다. 개발된 신뢰성해석기법은 5개 지역의 실제 구축된 우수관에 적용하여 안전도를 분석하고 공사비증가에 따른 안전도의 변화를 분석하였다. 다섯 개 지역의 빈도별 강우강도를 분석하고 신뢰성해석을 통해 우수관의 용량초과확률을 정량적으로 산정할 수 있었다.

키워드

우수관

신뢰성해석

강우

확률변수

References

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 51
No :10
Pages :887-893
Received Date : 2018-08-31
Revised Date : 2018-09-06
Accepted Date : 2018-09-06
DOI :https://doi.org/10.3741/JKWRA.2018.51.10.887

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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