• 한국건축시공학회지
• /
• 제7권2호통권24호
• /
• pp.67-76
• /
• 2007

The purpose of this study is to propose the efficient improvement in the lawsuit to request the guarantee against defect. This study points out several problems about related act and subordinate statue and judgement by analyzing the character of contract in apartment house, related laws and regulations, appraisals and judicial decisions. This study deduces the necessity of the establishment of the specification and the breakdown cost for repair and maintenance work to provide the standard for the detached judgement.

• 한국주거학회논문집
• /
• 제26권2호
• /
• pp.67-79
• /
• 2015

As the Korean construction market in the apartment housing has changed to a housing consumer focused market, interest and importance on efficient use and management on existing buildings has increased rather than demand for new buildings. Interest of housing consumers on apartment house quality has increased in this market paradigm, and this spontaneously is connected to quality flaw related defect disputes and lawsuits that the importance of defect diagnosis has continuously increased. This defect diagnosis is directly connected to maintenance charges in defect dispute and lawsuit processes that rather objective and highly credible progress of duty is required. However, most defect diagnosis firms today that progress defect diagnosis are using different diagnosis methods and depend on the experience of experienced professionals that there is no standardized defect diagnosis process. Therefore, the purpose of this study is to provide common defect diagnosis process model for defect diagnosis firms utilizing the BPMN (Business Process Modeling Notation) modeling method. It is expected that this will contribute to professional and reliable task performances of concerned defect diagnosis workers. Furthermore, it is expected that design lawsuit damage will be substantially reduced by standardizing defect diagnosis processes.

• 한국전자거래학회:학술대회논문집
• /
• 한국전자거래학회 2003년도 종합학술대회 논문집
• /
• pp.72-77
• /
• 2003

시설물의 손상현황을 파악하기 위한 현장점검업무는 의사결정과 유지보수공사를 위한 원천 정보를 생성하는 과정으로서 시설물 유지관리 Life Cycle에서 매우 중요한 부분을 차지하고 있다. 하지만, 수작업 및 중복입력 둥의 과다한 업무와 손상상태의 결정, 점검이력의 활용미비, 유지관리업무의 전문성 부족 등으로 효율성과 신뢰성을 갖춘 점검업무가 수행되지 못하고 있는 실정이다. 본 연구에서는 국도 상의 주요구조물인 교량, 터널, 지하차도 등을 대상으로 과다한 현장점검업무를 효율적으로 처리하고 점검결과에 신뢰성을 제공할 수 있는 현장점검시스템을 개발하였다. 현장점검업무의 분석과정에서 나타나는 문제점들을 파악하여 개선방안을 기능설계에서 반영하여 시스템화하였다. 본 시스템은 국도유지건설사무소에서 활용할 애정이며, 손상상태의 추적, 보수 물량 산출 등 유지관리 업무의 효율적인 관리가 가능해질 것으로 기대된다.

• 한국건축시공학회지
• /
• 제21권6호
• /
• pp.653-664
• /
• 2021

최근 에너지절약형 친환경주택의 건설기준 강화에 따라 고효율 주택의 수요가 증가하며, 창호공사의 비중이 함께 증가하고 있다. 창호는 사용빈도가 높고, 시공 시 특성에 따라 많은 하자가 발생할 가능성이 존재한다. 정부 기관이 공공임대주택에서 발생한 하자 민원을 조사한 바에 따르면, 접수된 민원 중 창호공사의 하자가 가장 높은 비중을 차지하고 있었다. 이에 따라 관련 선행연구를 고찰해보았고, 국내의 기존연구들은 창호공사의 시공 특성과 유지관리의 중요성을 반영한 연구가 부족한 실정이었다. 또한, 기존의 국외 연구들은 비용적 측면을 함께 고려해 시공자와 거주자의 입장을 모두 고려하였으며, 하자와 원인의 관계를 구조화하기 위한 움직임을 보여주었다. 따라서 본 연구는 창호공사의 시공단계에서 발생하는 원인을 분석해 시공 특성을 반영하고, 하자 보수 후 재발생 가능성에 기초한 유지관리의 중요성을 함께 고려해 중점관리요소를 도출할 것이다. 또한, 궁극적으로 하자 유형과 원인의 인과관계를 분석해 직관적 판단이 가능한 하자 유형별 중점관리요소를 선정함으로써 실효성 높은 하자관리 방안을 제시해 시공단계 하자를 예방하고 유지관리 비용을 저감하는 데 기여할 것이다.

• 인간식물환경학회지
• /
• 제23권3호
• /
• pp.347-362
• /
• 2020

Background and objective: It is difficult to conclusively determine the exact cause of tree defects since multiple causes are involved such as climate change, plantation, tree quality and planting time, construction, planting base, drainage, sunshine conditions, maintenance, and microclimate. The data related to landscaping construction defects are scattered or fragmented by companies and years, but not managed systematically by the defect information management system. Most of the earlier studies associated with tree defects in apartment complexes suggested defect rates after examining tree defects in the completed construction site and proposed fragmentary and subjective conclusions about the causes of defects observed in trees with high defect rates. It is proposed to continue to conduct studies on the establishment and analysis of systematic databases to identify the exact causes of tree defects and measures to improve, and the need to accumulate systematic data in the construction process where many defects arises. This study was conducted to reduce the defects of trees planted in apartment complexes. Methods: Main factors related to tree defects were subdivided based on the results of literature review and a defect investigation at the completion site, and tree history management items were selected and subdivided during the construction stage. Results: The criteria for the preparation of subdivided items were obtained, and the tree history management checklist was written for the site under actual construction and a systematic database was established. Items that are categorized based to the causes of defects include the location of nurseries, date, tree quality, site conditions, planting techniques, microclimates, and maintenance. Conclusion: This study suggested tree history management items based on the tree defects that can be identified at the construction stage and applied them to the selected study site, which differentiates this study from earlier studies. It will be necessary to conduct a comprehensive and objective time series analysis on tree defects that occur over time by continuously monitoring and collecting data after construction.

• 한국신뢰성학회지:신뢰성응용연구
• /
• 제18권2호
• /
• pp.184-191
• /
• 2018

Purpose: The purpose of this study is to propose a method to calculate the optimal preventive maintenance cycle of radar used in the aviation weapon system of ROKAF. Methods: A hybrid model is used to estimate the optimal preventive maintenance cycle in a system that can perform condition based predictive maintenance (CBPM) through continuous diagnosis. The failure data of the radars operating in the military were used to calculate the reliability. Results: According to the research results, the reliability threshold of the radar began to decrease after 5 flights, and decreased rapidly after 12 flights. Since the second check, costs have continued to decline. Conclusion: A method is proposed to determine the cycle of optimal preventive maintenance of radar within operational budget through modeling results between reliability limit and cost for radar. The results can be used to determine the optimal preventive maintenance cycle and frequency of various avionics equipment.

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

• Nuclear Engineering and Technology
• /
• 제52권7호
• /
• pp.1597-1601
• /
• 2020

Background: Non-destructive evaluation of defects in metals or composites specimens is a regular method in radiographic imaging. The maintenance examination of metallic structures is a relatively difficult effort that requires robust techniques for use in industrial environments. Methods: In this research, iron plate, lead marker and tungsten defect with a 0.1 cm radius in spherical shape were separately simulated by MCNP code and SuperMC software. By ¹⁹²Ir radiation source, two exposures were considered to determine the depth of the actual defined defect in the software. Also by the code, displacement shift of the defect were computed derived from changing the source location along the x- or y-axis. Results: The computed defect depth was identified 0.71 cm in comparison to the actual one with accuracy of 13%. Meanwhile, the defect position was recognized by disorder and reduction in obtained gamma flux. The flux amount along the x-axis was approximately 0.5E+11 units greater than the y-axis. Conclusion: This study provides a method for detecting the depth and position of the defect in a particular sample by combining code and software simulators.

• 대한건축학회논문집:구조계
• /
• 제34권3호
• /
• pp.95-102
• /
• 2018

In order to understand interaction between building users' occupant performance and building maintenance performance of maintenance management personnel, actual data from maintenance activities of buildings were analyzed. Also, using building defect customer complaint data reported by building user, satisfaction data on building maintenance services of building users and service response time of maintenance management personnel, a method for evaluating interaction of buildings with the same purpose and same size was proposed. Throughout analysis, average number of occurrences per unit area per year for the mechanical complaints in complex building were presented. In addition, using building users' satisfaction with facility management services, attitude of responding to business obstacles, number of occurrences per unit area per year of mechanical complaints and complaint processing speed, interaction was comprehensively identified and compared.

• 대한토목학회논문집
• /
• 제43권2호
• /
• pp.267-275
• /
• 2023

최근 30년 이상 노후화된 국내 인프라의 증가로 한정된 예산 내에서 인프라 유지관리를 위한 정확한 유지관리 비용산출과 그에 따른 적절한 예산분배의 중요성이 증대되고 있다. 이에 본 연구에서는 콘크리트 교량의 대표적인 결함과 이에 대한 보수보강 공법들을 매칭하고 유지보수에 필요한 비용을 산정하였다. 표준품셈과 BMS (Bridge Management System) 데이터 분석을 통해 교량의 보수보강 공법을 분류하였으며, 결함의 위치와 종류, 크기에 따라 결함-공법을 매칭하였다. 그리고 표준품셈을 기준으로 단위당 작업량과 물량을 계산하여 노무비, 경비, 재료비를 구분하여 산출하였다. 서울시 교량 유지보수 내역서와 비교를 통해 평균 예측 정확도가 85.1 %가 나왔으며, 결함의 간단한 조건을 통해 유지보수 비용을 파악할 수 있다. 향후 현장 조건을 고려한 장비 및 야간작업 여부를 추가하여 더 높은 유지보수 비용을 파악할 수 있을 것으로 기대된다.