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김규덕 ( Kim Gyu-deok ),손영현 ( Son Young-hyun ),박주원 ( Park Ju-won ),최미라 ( Choi Mi-ra ),이증빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
Recently, a variety of researches has been carried out to obtain a more controlled durability and long-term performance of concrete structures under carbonation and chloride attack environments. In particular, new procedures for reliability-based durability analysis and design have been noticed to be very valuable for the enhancement of service life of concrete structures. Although there is still a lack of relevant data, this approach has been successfully applied to some new concrete structures. It this paper, the limit state equation based carbonation depth, chloride penetration depth, and cove depth has been solved with a time dependent reliability index and the reliability analysis of durability performance has been carried out by using a reliability analysis based on the concept of minimum total cost. From the results, the influence of each parameter on the durability of concrete structures was investigated and the new procedure for durability analysis was demonstrated in terms of carbonation and chloride penetration data from various concrete structures. The reliability procedure might be very useful in designing important concrete structures and help to predict the remaining service life of existing concrete structures under deterioration(carbonation and chloride penetration) environments.
김규덕(Kim Gyu-Deok),손영현(Son Young-Hyun),박주원(Park Ju-Won),최미라(Choi Mi-Ra),이증빈(Lee Cheung-Bin) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
The importance of the life cycle cost analysis(LCCA) for reinforced concretes(RC) structures construction projects has been fully recognized over the last decade. Accordingly theoretical models, guidelines, and supporting software systems were developed for the life cycle cost analysis of reinforces concrete systems. However, the level of consensus on LCCA results is still low due to the lack of reliable data on maintenance activities for asset assessment in order to predict the asset management based LCCA of the given case, suggested the maintenance strategies level after reviewing other related materials. Apply the real information of the economic index and asset value. And based on such analytical measures, maintenance and operation cost and LCC in maintenance strategies level have been predicted; suggests the basic information about maintenance interventions level for the reinforces concrete structures. The model and the procedure presented in this study can greatly contribute to the value-oriented design alternative selection, estimation of the economic analysis, and the allocation of budget for reinforces concrete construction projects.
김규덕(Kim Gyu-Deok),손영현(Son Young-Hyun),박주원(Park Ju-Won),최미라(Choi Mi-Ra),이증빈(Lee Cheung-Bin) 한국구조물진단유지관리학회 2007 한국구조물진단학회 학술발표회논문집 Vol.11 No.1
Recently, a variety of researches has been carried out to obtain a more controlled durability and long-term performance of concrete structures under carbonation and chloride attack environments. In particular, new procedures for reliability-based durability analysis and design have been noticed to be very valuable for the enhancement of service life of concrete structures. Although there is still a lack of relevant data, this approach has been successfully applied to some new concrete structures. It this paper, the limit state equation based carbonation depth, chloride penetration depth, and cove depth has been solved with a time dependent reliability index and the reliability analysis of durability performance has been carried out by using a reliability analysis based on the concept of minimum total cost. From the results, the influence of each parameter on the durability of concrete structures was investigated and the new procedure for durability analysis was demonstrated in terms of carbonation and chloride penetration data from various concrete structures. The reliability procedure might be very useful in designing important concrete structures and help to predict the remaining service life of existing concrete structures under deterioration(carbonation and chloride penetration) environments.
김규덕 ( Kim Gyu-deok ),손영현 ( Son Young-hyun ),박주원 ( Park Ju-won ),최미라 ( Choi Mi-ra ),이증빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
The importance of the life cycle cost analysis(LCCA) for reinforced concretes(RC) structures construction projects has been fully recognized over the last decade. Accordingly theoretical models, guidelines, and supporting software systems were developed for the life cycle cost analysis of reinforces concrete systems. However, the level of consensus on LCCA results is still low due to the lack of reliable data on maintenance activities for asset assessment in order to predict the asset management based LCCA of the given case, suggested the maintenance strategies level after reviewing other related materials. Apply the real information of the economic index and asset value. And based on such analytical measures, maintenance and operation cost and LCC in maintenance strategies level have been predicted; suggests the basic information about maintenance interventions level for the reinforces concrete structures. The model and the procedure presented in this study can greatly contribute to the value-oriented design alternative selection, estimation of the economic analysis, and the allocation of budget for reinforces concrete construction projects.
사회기반시설의 신뢰성 기반 유지관리 전략 및 자산관리 시스템 개발
김성헌 ( Kim Sung-heon ),김규덕 ( Kim Gyu-deok ),박주원 ( Park Ju-won ),손영현 ( Son Young-hyun ),이중빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
In this study, a new method for the infrastructures maintenance is proposed to overcome the limit of the existing methods and to implement the preventive infrastructures reliability-based maintenance strategy and asset management system. The proposed method can establish the reliability-based maintenance strategy and asset management system of the deteriorating infrastructures considering the life-cycle condition and performance as well as LCC(life-cycle cost). The life-cycle cost is evaluated by considering not only the direct maintenance cost but also the user and failure cost. By using the developed program, this study proposed a process of maintenance scenario applying to be the bridge decks of national road, and the study examined the proposed method by establishing a reliability-based maintenance strategy and asset management system for the existing structure and its advantages. The result shows that the proposal method can be effectively applied to deciding the infrastructures reliability-based maintenance strategy and asset management system.
김성헌 ( Kim Sung-heon ),김규덕 ( Kim Gyu-deok ),박주원 ( Park Ju-won ),이증빈 ( Lee Cheung-bin ),안종필 ( Ahn Jong-pil ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
In this study, a reliability-based economical evaluation procedure for determining evaluation criteria of piled bridge abutment subjected to lateral movements is proposed. The proposed method intelligently integrates the concepts of Kanda method and Frangopol method. The uncertainties for lateral movement evaluation criteria associated with load conditions, material and section properties of a pile and soil properties are explicitly considered. The result shows that this proposed method can be effectively applied to deciding the reliability analysis and economic analysis evaluation.
퍼지결함수분석에 의한 항만구조물의 유지관리전략 시스템 개발
김성헌 ( Kim Sung-heon ),김규덕 ( Kim Gyu-deok ),손영현 ( Son Young-hyun ),박주원 ( Park Ju-won ),이중빈 ( Lee Cheung-bin ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
In this study, a harbor maintenance system is developed to safety performance-based optimum maintenance strategy by considering the structural safety. A fuzzy fault tree problem is formulated to generate a maintenance scenarios which satisfies the balance among the conflicting objectives is applied to the performance and safety during the harbor lifetime and a fault tree analysis algorithm is applied to the system. By using the developed problem, this study proposes a process of optimum maintenance scenario applying to the harbor structures. The developed system improves the current methods of establishing the harbor maintenance strategy and can be utilized as an efficient tool to provide the harbor maintenance scenario corresponding to the various constraints and requirements of harbor agency.
퍼지결함수분석에 의한 항만구조물의 유지관리전략 시스템 개발
김성헌(Kim, Sung-Heon),김규덕(Kim, Gyu-Deok),손영현(Son, Young-Hyun),박주원(Park, Ju-Won),이증빈(Lee, Cheung-Bin) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
In this study, a harbor maintenance system is developed to safety performance-based optimum maintenance strategy by considering the structural safety. A fuzzy fault tree problem is formulated to generate a maintenance scenarios which satisfies the balance among the conflicting objectives is applied to the performance and safety during the harbor lifetime and a fault tree analysis algorithm is applied to the system. By using the developed problem, this study proposes a process of optimum maintenance scenario applying to the harbor structures. The developed system improves the current methods of establishing the harbor maintenance strategy and can be utilized as an efficient tool to provide the harbor maintenance scenario corresponding to the various constraints and requirements of harbor agency.
김성헌 ( Kim Sung-heon ),김규덕 ( Kim Gyu-deok ),박상범 ( Park Sang-bum ),이증빈 ( Lee Cheung-bin ),안종필 ( Ahn Jong-pil ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1
In this study a reliability-based design procedure for determining evaluation criteria of piled bridge abutment subjected to lateral movements is proposed. PEM(point estimation method) for the reliability analysis of lateral movements evaluation has been described and a computer program has been presented for use with the PEM.. PEM does not require the evaluation of derivatives of the evaluation equation as do the FOSM(first order second moment) and AFOSM(advanced FOSM) Methods. Examples of reliability calculation of lateral movements evaluation using PEM have been described and compared with the MFOSM(mean first order second moment) methods.