L-헤더 시스템의 좌굴 거동에 관한 실험 연구

박완순,김갑득,Park, Wan Soon,Kim, Gap Deuk 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.10 No.3

스틸 스터드 구조물에서 사용되고 있는 기존 I형, 박스형 헤더는 시공성, 경제성 측면에서 여러 가지 문제점을 노출하고 있다. 이러한 문제점을 극복하기 위해 선진국에서는 냉간성형강을 L형으로 절곡한 L-헤더를 활발히 사용하고 있다. 그러나 국내에서는 이에 대한 연구가 부족하여 L-헤더를 사용하지 못하고 있는 실정이다. 본 연구에서는 이러한 문제점을 해결하기 위해 L-헤더에 대한 좌굴해석 및 휨 실험을 수행하였으며, 실험결과를 미국 철강협회(AISI, American Iron and Steel Institute) 설계기준과 비교하였다. 휨 실험결과 중력방향 하중이 작용하는 경우에는 국부좌굴이, 인발하중이 작용하는 경우에는 뒤틀림 좌굴이 발생되는 것으로 관찰되었다. 그리고 실험에서 측정된 좌굴 하중을 비교한 결과 AISI 설계기준에 제시된 공칭하중을 상회하는 것으로 확인되었다. The back-to-back and box-shaped headers used in light gauge steel structures have some disadvantages, i.e., construction efficiency and cost competitiveness. As such, cold-formed steel L-shaped headers have been developed and are used actively in advanced nations. However, this system has not been used in Korea because of inadequate investigation and adaptation efforts and lack of application example. Thus, this research evaluated the structural performance of L-header using buckling analyses and bending tests. Test results were compared using the AISI design criteria. Test results showed that local buckling and distortional buckling governed buckling behavior in gravity loads and uplift loads, respectively. These results were consistent with the calculated nomial strengths using the AISI design criteria.

냉간성형강 평트러스 시스템의 좌굴 거동에 관한 실험 연구

박완순,김갑득,Park, Wan Soon,Kim, Gap Deuk 한국강구조학회 2002 韓國鋼構造學會 論文集 Vol.14 No.6

기존 바닥조이스트의 문제점을 해결하기 위해 냉간성형강 평트러스 시스템에 대한 연구를 진행하였다. 냉간성형강 평트러스 시스템은 기존 스틸 조이스트 시스템과 유사한 구조형식을 취하고 있으며, 무게 대비 성능이 우수하고, 설비라인을 바닥 구조재와 동일 선상에 배치할 수 있다는 장점을 가지고 있다. 본 연구에서는 Square End Type(SE Type), Underslung Type(EE Type) 평트러스의 구조적 거동에 대한 분석과 더불어, AISI 설계기준을 토대로 평트러스의 설계하중에 대한 평가가 진행되었다. 그리고 휨 실험을 통해 평트러스의 좌굴 거동에 대한 조사를 진행하였다. 실험결과 SE Type 평트러스가 EE Type 평트러스 보다 집중하중에 유리한 것으로 확인되었으며, 약축방향에 대한 비보강길이가 평트러스의 성능에 중요한 영향을 미치는 것으로 분석되었다. 그리고 실험을 통해 측정된 평트러스의 좌굴하중은 AISI 설계기준 값을 충족시키는 것으로 확인되었다. Cold-formed steel truss system was reviewed in order to improve the various problems associated with the steel floor joist system, such as the structural deficiency caused by web punching and others. Two types of floor truss system using cold-formed steel were reviewed during this research project, including the square end type(SE type) and underslung type(EE type). The strctural behavior was analyzed using the AISI design criteria and various bending tests. Test results show that the SE type floor truss proved to be more efficient than the EE type when it is subjected to concentrated load, and that the unbraced length of the floor truss about the weak axis has much importance on the buckling strength of the floor truss. Test results indicate that their values surpass the calculated values predicated through the AISI design criteria.

소수력발전소의 수문학적 성능특성 분석

박완순,이철형,심명필,Park, Wan Soon,Lee, Chul Hyung,Shim, Myung Pil 대한토목학회 1994 대한토목학회논문집 Vol.14 No.5

본 연구는 소수력발전소의 성능분석 및 예측기법에 관한 것으로 소수력발전소에서의 유량지속곡선을 작성하기 위해서 Weibull 분포의 누가밀도함수를 사용하여 강수자료를 특성화하였고, 특성화된 유량지속함수를 이용한 성능분석모형을 개발하였다. 또한 한강수계에 위치한 안흥소수력발전소를 대상으로 개발된 성능분석모형을 이용하여 발전소의 성능특성을 분석하였다. 분석결과, 수문자료가 부족한 소수력발전소의 경우, 개발된 성능분석모형을 이용하여 기존 소수력발전소에 대한 성능분석 뿐만 아니라 발전소의 초기 설계시 설계유량, 설비용량, 연 평균가동율 및 연간 발전량 등의 성능 예측에도 효과적으로 이용할 수 있음을 확인하였다. This study presents the methodology for the performance analysis and prediction of small hydro power plants(SHP). Rainfall data are characterized to estimate the flow duration curve of SHP, using the cumulative density function of Weibull distribution. The model for the performance analysis of SHP is developed. Also, the performance characteristics of the existing Anheung Plant located in Han River basin are analyzed by using the developed model. As a result, it was found that the model is suitable to analyze the performance characteristics of existing SHP and to predict the primary design performance such as the design flowrate, capacity, rate of operation and annual electricity production of SHP.

기후변화에 의한 소수력발전소 설계변수의 영향

박완순(Park Wan-Soon),이철형(lee Chul-Hyung) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월

The effects of design parameters for small scale hydro power(SSHP) plants due to rainfall condition have been studied. The model to predict hydrologic performance for SSHP plants is used in this study. The results from analysis for rainfall conditions based on KIER model show that the capacity and load factor of SSHP site had large difference between the period. Especially, the hydrologic performance of SSHP site due to rainfall condition of recent period varied in design flowrate sensitively. And also, the methodology represented in this study can be used to decide the primary design specifications of SSHP sites.

수계별 소수력자원의 특성 분석

박완순(Park Wan-Soon),이철형(Lee Chul-Hyung) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4

Small hydropower resources for five major river systems have been studied. The model, which can predict flow duration characteristic of stream, was developed to analyze the variation of inflow caused from rainfall condition. And another model to predict hydrologic performance for small hydropower(SHP) plants is established. Monthly inflow data measured at Andong dam were analyzed. The predicted results from the developed models in this study showed that the data were in good agreement with measured results of long term inflow at Andong dam. It was found that the models developed in this study can be used to predict the available potential and technical potential of SHP sites effectively. Based on the models developed in this study, the hydrologic performance for small hydropower sites located in river systems have been analyzed. The results show that the hydrologic performance characteristics of SHP sites have some difference between the river systems. Especially, the specific design flowrate and specific output of SHP sites located on North Han river and Nakdong river systems have large difference compared with other river systems.

저낙차 수자원 활용을 위한 프로펠러수차 연구

박완순(Park Wan Soon),이철형(Lee Chul Hyung) 대한토목학회 2006 대한토목학회 학술대회 Vol.2006 No.10

기후변화에 따른 소수력자원의 수문학적 성능특성 변화

박완순(Park Wan-Soon),이철형(Lee Chul-Hyung) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.11

The variation of inflow at stream and hydrologic performance for small scale hydro power(SSHP) plants due to variation of inflow have been studied. The model, which can predict flow duration characteristic of stream, was developed to analyze the variation of inflow caused from rainfall condition. And another model to predict hydrologic performance for SSHP plants is established. Monthly inflow data measured at Andong dam for 32 years were analyzed. The existing SSHP plant located in upstream of Andong dam was selected and analyzed hydrologic performance characteristics. The predicted results from the developed models in this study show that the data were in good agreement with measured results of long term inflow at Andong dam and the existing SSHP plant. Inflow and ideal hydro power potential had increased greatly in recent years, however, these did not lead annual energy production increment of existing SSHP plant. As a results, it was found that the models developed in this study can be used to predict the primary design specifications and inflow of SSHP plants effectively.

GIS기반 소수력자원 분석용 Package Tool 개발

박완순(Park, Wan-Soon),이철형(Lee, Chul-Hyung),허준호(Heo, June-Ho),정상만(Jeong, Sang-Man) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06

This study seeks to develop a map of the domestic small hydropower(SHP) resources to further improve SHP resources, developed through package tool which can accurately evaluate a wide range of SHP basin in a short period of time. GIS-based package tool for SHP resources analysis was calculated using 840 standard basin classified by drainage area and facility capacity, etc., and to assume a 40% annual load factor, expected annual electricity production was calculated. SHP resources potential for the development of SHP will be utilized as basic data.

일체형 입축 프로펠러수차 모형의 수력학적 성능특성

박완순(Park, Wan-Soon),이철형(Lee, Chul-Hyung) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10

The propeller type hydro turbine model with vertical axis has been tested and analized. The blade angle of runner of turbine model were designed to be varied according to the condition of head and flowrate. When the changes in head and output were comparatively large, the efficiency drop were small, so the efficiency characteristics and stability of the entire operating condition were maintained in good condition. These results showed that the developed model in this study will be suitable for small hydro power stations with large changes in head and load such as sewage treatment plants and agricultural reservoirs.

Performance Anaysis of Small-Scale Hydro Power Sites

Park Wan-Soon(박완순),Paik Doo-Hyun(백두현),Ji Young-Ik(지영익),Park Joon-Sik(박준식),Lee Chul-Hyung(이철형) 한국태양에너지학회 2016 한국태양에너지학회 학술대회논문집 Vol.2016 No.10