확률론적 구조물 수명관리의 유지보수 상관관계 영향 평가
Correlation Effect of Maintenances on Probabilistic Service Life Management
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초록
구조물의 수명관리는 일반적으로 불확실성의 효율적 고려를 위해 신뢰성 이론을 적용한다. 전체 구조시스템의 신뢰성 평가는 구조요소의 신뢰성 평가와 구조시스템의 모델링을 통해 이루어진다. 구조시스템은 신뢰도에 대한 구조요소의 역할과 기여도를 고려하여 모델링 된다. 따라서, 구조시스템의 신뢰도는 구조요소의 모델링과 구조요소의 상관관계에 따라 서로 다른 결과를 제시하게 된다. 최초 구조시스템의 신뢰도 평가와 열화요소를 반영한 구조시스템의 수명 평가를 바탕으로 생애주기 비용 최소화와 관련된 목적함수를 가지는 최적화 과정을 통해 수명관리가 이루어진다. 본 논문에서는 구조시스템을 구성하는 구조요소의 상관관계와 더불어 기존의 연구에서 고려된 바 없는 유지보수 간의 상관관계에 따른 수명평가 영향분석을 수행하며, 이를 통해 향후 좀 더 효율적인 수명관리 기법 개발에 활용하고자 한다. 또한, 예방유지보수와 필수유지보수를 모두 고려하며, 유지보수간 독립 상태와 완전상관 상태에 따른 수명 예측 및 최적화 유지보수 계획 수립을 비교 제시한다.
Abstract
The assessment and prediction of service life of a structure are usually under uncertainty so that rational probabilistic concepts and methodshave to be applied. Based on these rational assessment and prediction, optimum maintenance strategies to minimize the life-cycle cost and/or maximizethe structural safety can be established. The service life assessment and prediction considering maintenance actions generally includes effects ofmaintenance types and times of the structural components on the service life extensions of structural system. Existing researches on the service lifemanagement have revealed the appropriate system modeling considering the correlation among the components is required for system reliability analysisand probabilistic service life estimation. However, the study on correlation among the maintenance actions is still required. This paper deals with sucha study for more effective and efficient service life management. In this paper, both the preventive and essential maintenances are considered for theextended service life estimation and management.
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