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퍼지결함수분석을 이용한 교량시스템의 상태 및 안전성평가
이증빈 ( Lee Cheung-bin ),나기현 ( Na Ki-hyun ),손용우 ( Sohn Young-woo ),박주원 ( Park Ju-won ) 한국구조물진단유지관리공학회 1999 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.3 No.1
This paper aims to propose a method that helps maintenance engineers to evaluate the damage states of bridge systems by using a Fuzzy Fault Tree Analysis(FFTA). It may be stated that Fuzzy Fault Tree Analysis may be very useful for the systematic and rational condition and safety assessment for real bridge systems problems because the approach is able to effectively deal with all the related bridge system damages in terms of the linguistic variables that incorporate systematically experts experiences and subjective judgement.
박주원 ( Park Ju-won ),나기현 ( Na Ki-hyun ),손용우 ( Sohn Yong-woo ),이중빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.1
The study is intended to propose a systematic procedure for the development of the condition assessment based structures safety and cost effective performance criteria for design and upgrading of bridge structures. A set of cost function models for life cycle cost analysis of bridge structures is proposed and thus the expected total life cycle costs(ETLCC) include initial(design, testing and construction) costs and direct · indirect damage costs considering repair · replacement costs, human losses and property damage costs, road user costs, and indirect regional economic losses costs. Optimum safety indices are presented based on expected total cost minimization using only tree parameters, which are the level of the failure cost to the initial cost(τ), the extent of increased initial cost by improvement in safety(ν) and the order of the initial cost function(n). From the numerical invetigations. it may be positively stated that the proposed optimum design procedure for bridge structures based on the ETLCC will lead to more rational, economical and safer design.
박주원 ( Park Ju-won ),나기현 ( Sohn Yong-woo ),손용우 ( Na Ki-hyun ),이증빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.2
The study is intended to propose a systematic procedure for the development of the condition assessment based structures safety and cost effective performance criteria for design and upgrading of deteriorating bridge structures. A set of cost function models for life cycle cost analysis of bridge structures is proposed and thus the expected total life cycle costs include initial(design, testing and construction) costs, maintenance costs expected strength failure costs and expected service ability failure costs. Optimum safety indices are presented based on expected total cost minimization using only tree parameters, which are the level of the failure cost to the initial cost(τ), the extent of increased initial cost by improvement in safety(ν)and the order of the initial cost function(n). It may be expected that the proposed approach can be effectively utilized for the development of optimal performance criteria for design and upgrading of deteriorating bridge structures.