• 한국수자원학회논문집
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• 제49권5호
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• pp.451-458
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• 2016

본 연구에서는 미계측유역에서의 빈도홍수량을 추정하기 위해 지역홍수빈도분석의 표준방법인 지수홍수법을 이용하였다. 이를 위해 충주댐 상류유역을 대상으로 공간확장한 22개 지점의 연최대홍수량 자료을 활용하였으며, 구축된 다지점의 자료계열을 이용하여 지수홍수법의 주요인자인 평균홍수량의 지역화 과정를 수행하였다. 지역화를 위한 방법으로는 홍수량과 유역면적과의 관계가 멱함수 법칙(power law)를 따른다는 이론에 근거한 경험관계를 유도하였다. 충주댐 상류유역 전체를 하나의 그룹, 3개의 중권역을 각각 하나의 그룹으로 구분하여 분석하였다. 도출된 결과에 따르면 평균홍수량과 유역면적과의 관계를 멱함수 법칙으로 설명할 수 있었다. 또한, 미계측 지점의 홍수량 추정시에는 가까운 계측지점 즉, 직상하류 유역의 비유량의 관계를 사용하는 것이 타당함을 증명하였다. 따라서, 미계측 유역을 위한 지역빈도해석은 지역홍수빈도해석 절차 자체도 중요하지만, 지역의 세밀한 구분과 그에 따른 지역화 경험관계 개발과정도 중요한 절차임을 확인할 수 있었다.

• Wind and Structures
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• 제24권5호
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• pp.465-480
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• 2017

Modelling an equilibrium atmospheric boundary layer (ABL) in computational wind engineering (CWE) and relevant areas requires the boundary conditions, the turbulence model and associated constants to be consistent with each other. Among them, the inflow boundary conditions play an important role and determine whether the equations of the turbulence model are satisfied in the whole domain. In this paper, the idea of modeling an equilibrium ABL through specifying proper inflow boundary conditions is extended to the SST $k-{\omega}$ model, which is regarded as a better RANS model for simulating the blunt body flow than the standard $k-{\varepsilon}$ model. Two new sets of inflow boundary conditions corresponding to different descriptions of the inflow velocity profiles, the logarithmic law and the power law respectively, are then theoretically proposed and numerically verified. A method of determining the undetermined constants and a set of parameter system are then given, which are suitable for the standard wind terrains defined in the wind load code. Finally, the full inflow boundary condition equations considering the scale effect are presented for the purpose of general use.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.80-81
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• 2019

Change requests occur persistently in the construction phase of a construction project. The law requires that the contract amount be adjusted in accordance with the relevant regulations when there is a change in the construction amount due to the design change in the construction contract. SAVE international, on the other hand, defines the value methodology as a systematic and structured approach to improving projects, products and processes. Design Changes in the construction projects require organizational efforts to improve value and quality. However, the law does not include change requests in which the VE object is fixed and related data is collected and function analysis can be derived in a short time. Therefore, it is necessary to apply VE to the design change procedure, which can further improve the value of construction work. The application derived from this study need to be presented as simply as possible without compromising the basic concept of VE. If the application is extended to the field and proved to be effective, it is expected to contribute to the overall value of construction work.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 춘계학술논문 발표대회
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• pp.13-17
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• 2007

The green roof industry have been developed with Europe, North America, Japan. At the same time, being recognized the important of green roofs in domestic industry and we just start to develop the relative technology as analyzing the future direction of advanced technology. Recently, local self-government including Seoul support the system for green roof which provide 50% of working expenses form of Matching Fund by Seed Money. As years go by, the number of build up the green roof has gradually increased to be proved. At this result caused by management of system in government, unstructured construction system, low development of support technology. In this study as analyzing the present of technical development, supporting by law and system for the advanced waterproofing and root penetration resistance technology, we suggest the development direction of it to be compared with application advanced technology and we could strengthen the international competitiveness to be industrialized the green roof considering system, technology, human infrastructure.

• 한국건축시공학회지
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• 제13권6호
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• pp.541-548
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• 2013

During the administration of a construction project, various types of participants are engaged in the project. From the design phase to the maintenance phase, these participants may confront many risks. To avoid these risks, participants should utilize an insurance company or a bond company. The types of risks and liability that a construction manager may face are listed in the construction law or contract. But there are some arguments related to risk transferring and the content of risks. For this reason, construction managers must carefully consider any possible risks in the contract and the construction law. Therefore, for construction managers to deal with risks appropriately, the introduction of a legal requirement to carry professional liability insurance, a defined compensation range for damages, a method of guarantee in the event of defects, a defined compensation claim period for damage, and a method of damage claim were suggested in this study.

• 대한건축학회논문집:계획계
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• 제36권2호
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• pp.79-86
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• 2020

In order to accommodate the increase in urban population due to government-led national planning and economic growth, many buildings such as houses and business building were supplied. Although the building law was revised and managed to manage the supplied buildings, for the sake of economic benefit, there have been buildings that are enlarged or reconstructed without declaring building permits. In order to manage these buildings, on-site surveys were conducted. but it has many personnel consumption. To solve this problem, a method of using a satellite image and a manned aircraft is utilized, but it is diseconomical and a renewal cycle is long. In addition, it is not utilized to the height, and although it is judged by the shading of the building, it has limitations that it must be calculated individually. In this study, height of the building was calculated by using the unmanned aerial vehicle with low personnel consumption, and the accuracy was verified by comparison with the building register and measured value. In this study, spatial information was constructed using a fast unmanned aerial vehicle with low manpower consumption and the building height was calculated based on this. The accuracy by comparing the calculated building height with the building register and the actual measurement.

• Structural Engineering and Mechanics
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• 제81권5호
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• pp.633-645
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• 2022

The active tuned mass damper (ATMD) is an efficient and reliable structural control system for mitigating the dynamic response of structures. The inertial force that an ATMD exerts on a structure to attenuate its otherwise large kinetic energy and undesirable vibrations and displacements is proportional to its excursion. Achieving a balance between the inertial force and excursion requires a control law or feedback mechanism. This study presents a technique for the optimum design of a sliding mode controller (SMC) as the control law for ATMD-equipped structures subjected to earthquakes. The technique includes optimizing an SMC under an artificial earthquake followed by testing its performance under real earthquakes. The SMC of a real 11-story shear building is optimized to demonstrate the technique, and its performance in mitigating the displacements of the building under benchmark near- and far-fault earthquakes is compared against that of a few other techniques (proportional-integral-derivative [PID], linear-quadratic regulator [LQR], and fuzzy logic control [FLC]). Results indicate that the optimum SMC outperforms PID and LQR and exhibits performance comparable to that of FLC in reducing displacements.

• 한국수자원학회논문집
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• 제55권12호
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• pp.1155-1163
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• 2022

40여년 전 하천관리에 하천환경개념이 도입된 이래 법과 제도개선, 연구개발 등 많은 노력이 경주되어 왔고, 이제 하천환경관리는 치수분야와 더불어 하천관리의 주요 이슈로 자리잡아가고 있다. 본고에서는 관련 법제도의 변천사 및 현행 법정계획 등을 검토하고, 하천환경관리의 실효성을 제고 할 수 있는 방안으로서 하천 물리 자연도 조사의 중요성과 시행방안을 제안하였다.

• 대한토목학회논문집
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• 제31권6D호
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• pp.857-865
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• 2011

본 연구에서는 선진외국의 건축물 유지관리제도의 운영실태를 비교분석하여, 우리의 건축물 유지관리의 문제점을 명확히 하고, 제도적 개선방향을 설정하는데 목적을 두었다. 사례분석 대상 국가로서는 근대적 건축 및 도시계획제도를 우리보다 먼저 건축활동 및 도시공간에 반영하고 있는 미국 및 영국, 캐나다, 독일, 일본을 대상으로 하였다. 결과, 건축물 유지관리 관련제도는 각 국의 사회 경제 문화적 배경 및 특성에 따라 다양한 형태로 운영되어지고 있는 것을 알 수 있었다. 건축물의 유지관리에 대한 대응은 필연적 과제이지만, 먼저 우리의 사회 경제 문화적 배경 및 건축문화, 도시환경을 기반으로 한 명확한 정책과제의 설정에 따른 관련제도의 정비가 필요하고, 건축물 유지관리에 대한 접근의 주된 시각은 건축물의 기능 및 안전을 보장하고 나아가 바람직한 도시환경 및 건축문화를 형성하기 위한 시스템적 유도관리기법 및 이를 뒷받침할 제도적 장치가 되어야 한다는 것이다. 즉, 의무화에 의한 어느 정도의 강제적 수단과 함께 자발적 의지로 참여할 수 있는 방안이 동시에 진행되어야 건축물 유지관리제도의 정착이 가능하다는 것이다.

• 유통과학연구
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• 제11권4호
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• pp.23-35
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• 2013

Purpose - This paper attempts to identify the problems and limitations of a market maintenance project conducted according to the 「Special Act for the Development of Traditional Markets and Shopping Street」 and to present a revised direction for the special law and lay the groundwork for market maintenance projects to be promoted smoothly. Research design, data, and methodology - The revised direction for the legislation and the proposal were written based on an investigation of the problems and the legal system, and proposed measures for market maintenance operation and system improvements to derive the improvements needed for market maintenance projects. Results - A market maintenance project has been conducted as a means to reinvigorate traditional markets that are economically depressed, and to revive the local economy. It was largely conducted in the form of reconstruction and redevelopment and represents the interests of landowners and merchants. Thus, it is most likely to contribute to the gradual disappearance of traditional markets. First, as part of a market maintenance project, many companies are building multipurpose buildings or high-rise residential buildings to increase profits. In these high-rise buildings, they can raise rents, which may not be affordable for some existing small businesses. To solve such problems, the large-scale store registration requirement needs to be relaxed or abolished once the market maintenance project is completed. If the large-scale store registration requirement is to be abolished, the term 'large retail store' should be changed in the 「Special Act for the Development of Traditional Markets and Shopping Street」. After registration, the Small and Medium Business Administration should train merchants, offer consultations, and support events, to the extent that the existing traditional market management modernization project permits, and further continue to manage and support its ongoing activities. However, unless large-scale store registration is abolished, adding an exception clause in the special law to relax large-scale store registration criteria, and permitting changes to building use is another option. At the end of a market maintenance project, empty stores should be purchased by the Small and Medium Business Administration, and local government, etc., at the actual construction cost, to utilize them as public rental shopping areas, which in turn may be re-utilized as a temporary market for another market maintenance project. The second problem in market maintenance projects is merchant-protection. Currently, the special law prescribes that a temporary market be created for merchants to conduct business during the rental period of a market maintenance project. Conclusions - In reality, a market maintenance project is conducted usually in big metropolitan cities with 500,000 residents or more. The main building type created under these projects is a multipurpose building. For this reason, it is very difficult to secure a location for a temporary market in the surrounding area of such a project. To solve this problem, this study suggests 'public rental shopping areas' as mentioned above.