For efficient maintenance management of load facilities, an establishment of asset management system is necessary which helps prediction of maintenance cost and strategic allocation of budget in consideration of toy priority. The main purpose of this study is to suggest asset valuation method, which is practical in conformity with domestic situations, through researches on asset valuation method of load facilities. As a consequence, the management and maintenance system of existing highway facilities needed an innovation involving the concept of asset management. This study discusses the new facility management system suitable to local highway agencies. The new system incorporates asset management concept so that it can analyze the project level facility management solution and it can also improve the budget efficiency for local government. This study also presents systematic method to integrate various facilities for management system.

In this study, a bridge maintenance system is developed to generate performance based maintenance strategy by considering the life cycle cost(LCC). And it is proposed that the concept of generally annual maintenance are practically and easily used to perform LCC analysis. Some of generally annual maintenance data are suggested through existing data analysis due to the proposed concept and LCC analysis of by a real bridge structures is preformed by comparison with a current approach. This paper presents the development of bridge maintenance strategy and can be utilized as an efficient tool to provide the best economical bridge maintenance scenario corresponding to the various constraints and requirements of bridge agency.

This paper presents the development of LRFD codes for axially-loaded driven piles in sands. Reliability analyses were performed using the AFOSM and finally, reasonable resistance factors of base and shaft resistances were calculated base on the results of reliability analyses for different target reliability index levels. From the results of extensible reliability analyses using AFOSM, resistance factors for base and shaft resistances were found to be highly dependent on the ratios of dead-to-live load and ultimate base resistance to limit shaft resistance. Resistance factors are proposed for different combinations of these ratios within their possible ranges.

빛은 인류가 시작되고나서 현재까지 언제나 인간의 일생에 커다란 영향을 미치는 에너지원이다. 이로 인해 모든 인간은 빛과 함께 할 때 보다 편안함을 느낄 수 있으며 안정된 마음으로 아름다움과 행복을 추구하려는 본능을 가지게 된다. 본 논문에서는 퍼지제어 시스템을 이용하여 외부환경요인을 각각 조합하여 불확실한 내용을 정량적인 값으로 변환하여 LED 조명으로 표현하기 위해 알고리즘을 설계하고, 실내에서 이용 가능한 감성조명용 LED 제어기 회로를 설계 및 제작하였다. 외부환경요소인 온도, 습도, 조도 값을 센서를 통해 제어기로 받아 들이고 이 값들을 퍼지제어 알고리즘을 통해 최적조명값으로 변환되어 인간이 느끼기에 편안한 감성조명을 LED 디밍제어를 통해 표현하고자 한다.