• Structural Monitoring and Maintenance
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• 제1권1호
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• pp.1-45
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• 2014

The developments and implementations of the structural health monitoring (SHM) system for large infrastructures have been gradually recognized by researchers, engineers and administrative authorities in the last decades. This paper summarizes an updated review on innovations and applications in SHM for infrastructures carried out by researchers at Dalian University of Technology. Invented sensors and data acquisition system are firstly briefly described. And then, some proposed theories and methods including the sensing technology, sensor placement method, signal processing and data fusion, system identification and damage detection are discussed in details. Following those, the activities on the standardization of SHM and several case applications on specific types of structure are reviewed. Finally, existing problems and promising research efforts in the field of SHM are given.

• 한국터널지하공간학회 논문집
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• 제18권6호
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• pp.525-533
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• 2016

기존의 터널 유지관리 체계는 결함 및 손상부위의 보수 또는 설계기준을 충족하기 위한 보강 등 사고예방적인 안전성 중심의 유지관리방식으로 관리되고 있어 효율적이고 전략적인 유지관리를 실시하는데 한계를 보이고 있다. 현재 국가연구를 통해 터널의 성능저하를 예측, 평가하여 한정된 재정을 효율적으로 투자할 수 있도록 성능중심의 유지관리체계로의 전환을 시도하고 있다. 본 연구에서는 터널시설물을 중심으로 기존의 안전중심의 유지관리 체계에서 구조적 안전은 물론이며, 서비스수준 및 내구성능 등의 성능저하를 고려한 터널시설물의 성능중심 평가체계의 개발을 위하여 성능평가를 위한 평가지표를 도출하고자 한다. 성능중심 평가기법 개발을 위한 평가지표는 문헌자료 분석 및 델파이 설문을 통하여 선정하였으며, 평가지표간의 중요도는 AHP 분석을 통해 산정되었다. 본 연구결과는 터널시설물의 성능중심 유지관리 체계에 적용되어 터널의 유지관리 시 합리적인 의사결정을 지원할 수 있을 것으로 판단된다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1998년도 봄 학술발표회 논문집
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• pp.229-236
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• 1998

Port structures are one of the important infrastructure of the nation. To ensure safety and extend lifetime of the existing port structures, it is necessary to develop proper maintenance program. In this study, port inspection manual for pier type structure are developed. The flow of inspection program is designed and defect type for each component of wharf is classified. Also systematic method of rating and evaluation is developed together with conceptual design of port maintenance data base system.

• 한국구조물진단유지관리공학회 논문집
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• 제23권6호
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• pp.70-76
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• 2019

본 논문은, 시설물안전법의 적용을 받지 않아 안전사각 지대에 놓여 있는 중소규모 교량들의 유지관리 전략 수립시 기초자료로 활용할 수 있는, 중소규모 교량 성능평가 우선순위 결정 방안을 제시하기 위해 실시하였다. 이를 위해 취약도와 영향도를 기반으로 하는 위험도 지수를 산출하고, 산출된 위험도 지수에 따라 이들 교량들을 성능평가 즉시실시교량, 단기실시교량 및 관찰교량으로 구분하여 제안하고, 실제 공용중에 있는 중소규모 교량에 적용하여 제안한 방안의 현장 적용성을 확인하였다. 연구결과, 여기서 제시된 방안은 향후 중소규모 교량의 유지관리 전략 수립에 적절히 활용되어 중소규모교량 사고 방지 및 유지관리 예산절감에 기여할 수 있을 것으로 판단되었다.

• 한국산학기술학회논문지
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• 제22권1호
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• pp.568-574
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• 2021

2020년부터 시행된 「지속가능한 기반시설 관리기본법」에 의해 저수지는 체계적인 유지관리와 성능개선 등의 선제적인 관리로 노후화에 따른 생애주기 비용을 최소화하도록 관리해야 한다. 생애주기를 고려한 유지관리를 위해서는 공용기간이 증가함에 따라 지속적인 성능저하에 의해 수명이 종료되는 시점을 생애 주기적인 관점에서 도출하는 것이 필수적이며 이를 위해서 저수지의 성능저하예측 모델 개발이 요구된다. 본 논문에서는 저수지를 주요 복합시설인 제체, 여수로, 취수시설로 구분하고, 생애주기 유지관리를 위한 성능저하예측 모델을 개발하였다. 모델 개발을 위해 농어촌공사의 농업기반시설 시스템(RIMS; Rural Infrastructure Management System)이 관리 중인 유지관리 정보 데이터를 수집하였으며, 수집된 데이터를 통계적으로 분석하여 모델 개발에 활용 가능한 데이터를 선별하고 추세분석을 통해 모델을 개발하였다. 개발된 모델을 통해 저수지가 현행의 유지관리 체계에서 예상되는 기대수명과 미조치시 예상되는 기대수명을 예측하였으며, 현행 유지관리체계에서의 기대수명은 미조시치 기대수명보다 약 네 배가 증대되는 것으로 나타났다. 본 논문을 통해 제안된 모델을 활용하여 향후 저수지의 생애주기를 고려한 운영관리와 유지보수의 의사결정 지원이 가능할 것으로 판단된다.

• Smart Structures and Systems
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• 제20권6호
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• pp.697-708
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• 2017

Maintenance plays a critical role in the bridge industry, but actual practices show many limitations because of traditional, 2D-based information systems. It is necessary to develop a new generation of maintenance information management systems for more reliable decision making in bridge maintenance. Enhancing current work processes requires a BIM-based 3D digital model that can use information from the whole lifecycle of a project (design, construction, operation, and maintenance) through continuous exchanges and updates from each stakeholder. This study describes the development of a data scheme for maintenance of cable-stayed bridges. We implemented the proposed system for a cable-stayed bridge and discussed its effectiveness.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.57-58
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• 2020

Recently, government office buildings have become important in reducing maintenance costs. However, the loss of information raised a problem for maintenance work that could not meet the needs of users. Therefore, this study proposed a BIM-based integrated maintenance system for public offices in Jeju to efficiently maintenance work. The system can be integrated with IoT sensors, big data and artificial intelligence technologies to integrate information that occurs throughout the building's entire life cycle to exchange information. This system is also scalable to buildings, plants, region and urban infrastructure facilities as well as single buildings. It is expected that the system will provide reliable, high-quality, real-time information for efficient maintenance work, thereby supporting decision making and appropriate budget planning.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 춘계학술발표회 논문집(I)
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• pp.562-565
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• 2006

Recently, the public interest for infrastructure safety has been growing, but the process of data acquisition and management system for safety is being carried out in an inefficient manner. The data obtained during the inspection for the safety of infrastructure tends to be documented using papers, which is not efficient in the stage of post analyses. The information technology (IT), which is rapidly being developed, is applied to the new system as a solution. Information technology provides valuable tools for converting and generating digital data, handling the history of defects, and assessing the condition and estimating the service life of infrastructure. The purpose of this paper is to introduce Infrastructure Management System(IMS). It is expected that the IMS would minimize the manpower, time and maintenance cost, and improve the safety of infrastructure.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.691-692
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• 2015

Several scholars in South Korea have predicted that maintenance costs of social infrastructure will sharply increase from the mid-2020s, and cause budgetary deficits among facilities management agencies. Interest in infrastructure asset management (IAM) is rising as a solution to such problem. In this study, an information system for asset valuation that reflects the salvage value and deferred cost of social infrastructure based on WBS (work breakdown structure) was developed in consideration of IAM. To reuse the construction cost information such as the acquisition cost, the interconnection between CBS (cost breakdown structure) and WBS was considered. Furthermore, asset valuation information was developed with XML schema to facilitate the exchange and reuse of the information among project participants.

• International Journal of Railway
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• 제2권3호
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• pp.107-112
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• 2009

Research projects of SNCF aim at reducing the costs of infrastructure possessions and improving the operational equipment availability and safety. This permanent search for a better regularity led the SNCF to analyse the maintenance approach of signalling equipment in detail. Until now, it was commonly acknowledged that signalling equipment, which consists of many electronic devices, is not subject to aging. In this study, a Weibull lifetime model, able to describe an aging phenomenon, is used and it can be shown that the deterioration is statistically significant. The validity of the model is tested. We also analyse the influence of environmental covariates. We simulate different scenarios in order to investigate the impact of several maintenance strategies as well as on future maintenance costs, on the amount of components to replace based on the mean age of the network. It can be shown that in most cases a systematic replacement strategy offers the best solution.