강관구속 고강도 철근콘크리트기둥의 내진 성능 평가

이규 ( Lee Giu ),허광희 ( Heo Gvanghee ),윤현도 ( Yun Hyun-do ),최만용 ( Choi Man-yon ) 한국구조물진단유지관리공학회 2000 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.4 No.1

A new method to pervent reinforced concrete columns from the brittle failure. The mentod is called transversely reinforcing method in which only the critical regions are confined in steel tube. The steel tube can change the failure mode of the latter columns from the shear to the flexure. The steel tube also increse the compressive strength, shear strength and deformation capacity of the infilled concrete. The following discussions are reached on bases of the experimental study on the seismic performance of the high-strength RC rectangular short columns confined in steel tube with shear span to depth ratio of 1.0 and 2.0

일일상황보고를 중심으로 재난안전 데이터 관리 체계의 유형화

이규(Giu Lee),정인수(In-Su Jung) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.9

본 연구에서는 행정안전부에서 발행하는 국민 일일상황보고서와 재난 연감 및 재해 연보 등을 활용하여 재난 및 안전관리 기본법에서 선언하고 있는 자연 재난 15종, 사회 재난 7종의 총 22종을 대상으로 재난 안전 데이터를 조사하고, 이들 재난의 데이터 특성에 따라 재난을 유형화하였다. 재난 안전 데이터는 행정안전부의 일일상황보고 자료를 대상으로 자연재난 656건, 사회재난 1,104건으로 총 1,760건을 대상으로 하였다. 신속하고 효율적인 재난 상황 관리를 위한 재난 안전 데이터 체계 마련을 목적으로 하였기 때문에 대응과 복구 단계의 활동과 관련된 데이터를 재난의 종류별로 분류하여 분석하였다. 그리고, 재난 발생 후 시간적 흐름에 따라서 수행하는 관리 활동들을 기반으로 재난 안전 데이터에 대한 특성과 재난 안전 관리 절차 등을 분석하여 효율적인 재난 관리 업무 수행을 위한 재난 안전 데이터 유형을 분류하여 제시하였다. 유형 분류는 유사성이 높은 재난은 서로 통폐합하고, 향후 재해연보나 재난연감 등의 국가통계데이터 구축에 활용될 수 있도록 확장성 및 상호 연계성을 고려하였다. This study investigated a total of 22 types (15 types of natural disasters and seven types of social disasters) of disaster and safety data based on the National Daily Situation Report, Disaster Yearbook and annual Disaster Annals issued by the Ministry of Public Administration and Security. Disaster safety data were collected from the daily situation report of MOIS (Ministry of the Interior and Safety). The number of total data cases were 1,760, of which 656 were natural disasters and 1,104 were social disasters. The disasters were then patternized according to their characteristics. The patterning was conducted to set up the disaster and safety data system designed to keep disaster situations under prompt and effective management. The study analyzed the data associated with the activities in the response and recovery stages according to the disaster type. Furthermore, based on the management activities performed with the flow of time following a disaster, this study classified and proposed disaster and safety data patterns to achieve effective disaster management work by analyzing the characteristics of a disaster and safety data and disaster and safety management procedures. Disasters of high similarity were classified by merging and deleting them. This was done to consider the scalability and mutual linkage so that it can be used in the establishment of national statistical data, such as the disaster annual report and disaster annuity.

재난안전 데이터 활용 촉진을 위한 법제도 분석

이규(Lee, Giu),정인수(Jung, Insu) 대한토목학회 2019 대한토목학회 학술대회 Vol.2019 No.10

사회기반시설물의 자산관리를 위한 기본체계 및 기술적 성공요인

이규(Lee Giu),채명진(Chae Myung Jin),김정렬(Kim Jung Ryul),박재우(Park Jae Woo),조문영(Cho Moon Young),정형석 대한토목학회 2008 대한토목학회 학술대회 Vol.2008 No.10

구조물의 랜덤진동 제어를 위한 통합 강인 제어 시스템

이동기 ( Lee Dong-gi ),이우상 ( Lee Woosang ),이규 ( Lee Giu ),허광희 ( Heo Gwanghee ),전준룡 ( Jeon Joonryong ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1

In this paper, design and analysis of robust feedback control system are presented using the state-space approach. When mathematical models are used to describe real structural system, the differences between the mathematical models and the real structures can cause poor performance of control systems, especially for large-scale structures due to the structural uncertainties. Therefore, when controllers are used to reduce the random vibration caused by rain and wind loads, we cannot expect that control systems achieve satisfactory control result. Hence, it is important that robust feedback control systems must be designed considering system uncertainties. Considering the robust feedback control to carry out the control of uncertain systems, system stability can be guaranteed for structural perturbations occurring by modeling error. In order to explore the system stability with perturbation, the stability of nominal system should be stable. For application, the uncertain systems considering natural frequency and design constraints i.e, structures that have structural perturbations happening by mass and stiffness, are adapted to develop unified controller algorithm, which is optimal and robust. And, to investigate the validity and performance of the algorithm, numerical simulation is illustrated. Numerical result shows that the designed controller can be applied very well to the problem of degradation of control system performance.

구조물의 랜덤진동 제어를 위한 통합 강인 제어 시스템

이동기(Lee Dong-Gi),이우상(Lee Woosang),이규(Lee Giu),허광희(Heo Gwanghee),전준룡(Jeon Joonryong) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-

In this paper, design and analysis of robust feedback control system are presented using the state-space approach. When mathematical models are used to describe real structural system, the differences between the mathematical models and the real structures can cause poor performance of control systems, especially for large-scale structures due to the structural uncertainties. Therefore, when controllers are used to reduce the random vibration caused by rain and wind loads, we cannot expect that control systems achieve satisfactory control result. Hence, it is important that robust feedback control systems must be designed considering system uncertainties. Considering the robust feedback control to carry out the control of uncertain systems, system stability can be guaranteed for structural perturbations occurring by modeling error. In order to explore the system stability with perturbation, the stability of nominal system should be stable. For application, the uncertain systems considering natural frequency and design constraints i.e, structures that have structural perturbations happening by mass and stiffness, are adapted to develop unified controller algorithm, which is optimal and robust. And, to investigate the validity and performance of the algorithm, numerical simulation is illustrated. Numerical result shows that the designed controller can be applied very well to the problem of degradation of control system performance.

국내외 사회기반시설물 자산관리 사례 분석을 통한 국내 발전 방안

채명진,이규,김정렬,조문영,Chae, Myung-Jin,Lee, Giu,Kim, Jung-Ryul,Cho, Moon-Young 한국건설관리학회 2009 건설관리 : 한국건설관리학회 학회지 Vol.2 No.3

In many developed countries, social infrastructure asset management has become an important issue for the effective operation and management, performance improvement, and providing better quality services. This paper describes infrastructure asset management practices in Korea and in the developed countries. Learning lessons from those countries and improve the asset management practices in Korea is the main theme of this paper. Considering the definition and basic structure of infrastructure asset management, authors have analyzed main concerns regarding infrastructure management, techniques, organizations (systems), and processes. The requirements and considerations are presented to overcome the limitations of current maintenance system. This paper will assist adopting infrastructure asset management in Korea and provide guide for the infrastructure maintenance. 사회기반시설물의 노후화나 성능 저하가 사회적 이슈화가 되면서 효율적인 관리, 운용, 성능향상, 그리고 질 높은 서비스 제공을 위한 자산관리에 대한 관심이 높아지고 있다. 본 논문에서는 국내외에서 현재 자산관리가 수행되고 있는 사례와 현황 분석을 통해 국내에 자산관리 도입을 위한 방안을 모색하기 위한 연구를 수행하였다. 자산관리의 정의와 기본 구성 체계를 고려하여 시설물 관리에 대한 주요 고려사항, 기법, 체계와 프로세스 등을 분석하였다. 그리고, 국내에 현행 유지관리 체계의 한계와 자산관리의 도입을 위해 필요한 고려사항 및 요구사항 등을 제시하였다. 이 논문은 국내에 시설물 자산관리를 효율적으로 적용하는데 상당히 도움이 될 것이며, 나아가 대한민국에 시설물 자산관리 업무나 가이드라인을 도입하기 위해 요구되는 연구 개발 분야를 조명하였다.

단일 능동제어 시스템의 최적 계측 위치를 이용한 사장교 유지관리방안

이동기(Lee Dong-Gi),이규(Lee Giu),허광희(Heo Gwanghee),신형철(Shin Heung chul),최만용(Choi Mhan-Young) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-

This paper aims to find the optimal sensor locations on the bases of unified control system to minimize the observation cost while satisfying accuracy requirements of system performance for cable-stayed bridges. A new optimal sensor-location algorithm was developed using output feedback of unified control concept which can reduce observation cost associated with constrained observability matrix. This proposed algorithm was applied to the four degree of freedom structural system which contains the same complexity and structural characteristics as a cable-stayed bridge. It also proved to be useful to choose the best sensor location for controllability and observability of the structural system.

단일 능동제어 시스템의 최적 계측 위치를 이용한 사장교 유지관리방안

이동기 ( Lee Dong-gi ),이규 ( Lee Giu ),허광희 ( Heo Gwanghee ),신형철 ( Shin Heung Chul ),최만용 ( Choi Mhan-young ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1

This paper aims to find the optimal sensor locations on the bases of unified control system to minimize the observation cost while satisfying accuracy requirements of system performance for cable-stayed bridges. A new optimal sensor-location algorithm was developed using output feedback of unified control concept which can reduce observation cost associated with constrained observability matrix. This proposed algorithm was applied to the four degree of freedom structural system which contains the same complexity and structural characteristics as a cable-stayed bridge. It also proved to be useful to choose the best sensor location for controllability and observability of the structural system.

사회기반시설물 유지관리를 위한 자산관리체계 도입 전략

진경호,채명진,이규,이교선,Chin, Kyung-Ho,Chae, Myung-Jin,Lee, Giu,Lee, Kyo-Sun 한국건설관리학회 2009 한국건설관리학회 논문집 Vol.10 No.6

Infrastructure asset management can be defined as the long term and cost effective management strategy to meet the required service level. In most developed countries, the major motivations of the introduction of asset management are increment in number of assets, extension of maintenance field, accounting approaches of public facilities, performance-based FM(Facility Management), limitations of public funds and public-private partnership, life cycle cost approach, and the development of information technology. This paper discusses the strategic and stepwise methods of introducing infrastructure asset management. Strategic approaches are suggested to develop the practical methods of condition and value assessment of assets, and long-term capital investment plan for optimized decision making(ODM). Required systematic processes are analyzed in terms of resource and technical limitations and detailed implementation plan for each development phases are suggested. 자산관리는 사회기반시설물의 요구되는 서비스수준을 만족시키기 위한 장기적인 비용 효율적 관리라고 정의할 수 있다. 선진외국의 경우 사회기반시설물의 증가와 유지관리 시장의 확대, 유지관리를 위한 회계적 접근방식, 성능 중심의 시설관리, 자원의 한계와 민간과의 협업 강화, 생애주기 비용 개념의 확대 적용, 정보화기술의 발전이 동인이 되어 자산관리가 도입되었다. 본 논문에서는 국내외 자산관리의 현황 및 문제점을 분석하여 사회기반시설물의 자산관리체계 도입 방안과 추진 전략에 관한 연구를 수행하였다. 먼저, 국가자산의 합리적인 평가와 동시에 유지관리를 포함한 장기적 최적 투자 의사결정을 수행할 수 있는 국가적 차원의 자산관리체계 구축을 위해 국내의 도입 환경을 분석하여 도입방안을 모색하였다. 그리고 성공적 사회기반시설물 자산관리체계 도입을 위해 제도적, 프로세스적, 자원적, 기술적 측면에서 요구되는 핵심 전략을 분석하여 세부전략별로 실천과제를 분석하여 단계별 추진 전략을 제시하였다.