• Title/Summary/Keyword: Facility Design

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Design of Pull Box Members on the Landing Pier Using Finite Element Analysis of a Steel Plate (강재 플레이트 유한요소해석을 이용한 잔교 상부의 풀 박스 부재의 선정)

  • Kim, Sungwon;Hong, Hyemin;Han, Taek Hee;Seo, Seung Nam
    • Journal of Coastal Disaster Prevention
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    • v.4 no.3
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    • pp.111-118
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    • 2017
  • In this study, pull box members were designed by finite element analysis of a steel plate covering a pull box to secure its safety on the landing pier dedicated to the large research survey ship. It was assumed that the maximum load is due to the 250 tonf class crane used for unloading work when the working environment in the upper part of the landing pier was considered. The safety of the pull box was evaluated by the comparison between the yield strength of the steel plate and the result of stress analysis on the steel plate due to the crane load. It was found that the stress at the plate from the crane load exceeded the yield strength of the steel(205MPa) when the upper part of the pull box was protected by a $1950{\times}1950mm$ steel plate cover. In order to compensate for this, a concrete filled steel tube(CFT) column with a diameter of 150 mm and a steel thickness of 10 mm was reinforced at the center of the plate, and the finite element analysis was carried out. However, the maximum stress at the steel plate was higher than the yield strength of the steel in some load cases so that it was tried to find appropriate thickness of the steel plate and diameter of the CFT columns. Finally, the analysis results showed that the safety of the pull box was secured when the thickness of the steel plate and the diameter of the CFT column were increased to 30mm and 180mm, respectively.

An Approach to Improve the Rooftop Space of Commercial Facilities (상업시설의 루프탑 공간 개선방안 연구)

  • Kim, Hye-Ri;Kim, Young-Hwa;Lee, Sang-Hong
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.34 no.6
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    • pp.93-103
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    • 2018
  • In the past, the rooftop was a place where a water tank was to be installed, and a space of secretion and concealment such as a warehouse exposed in the air. It was because it was judged to hinder the beauty of a city as a whole without having any functional value per se. However, the roof portion is increasingly being utilized for a space such as a cafe, a pub, and a lounge as the rooftop is highly recognized as a place for leisure activities other than an idle space in modern times. Nonetheless, there are no detailed ordinances and criteria corresponding to such circumstances. For example, in case of the rooftop space, the building code applied to the rooftop space is a legal system when the rooftop was an idle space in the past though people have now accessed more increasingly to the rooftop than in the past. This study investigated the definition on the rooftop space evolved in accordance with the change of the rooftop space and the related legal system in Korea, and conducted a survey for the purpose of performing the field investigation for the analysis of physical status in 117 spaces that form the rooftop space in the rooftop of small-scale commercial facilities with 2 stories through 4 stories in Korea and analyze the recognition of users and analyzing the recognition of users. We analyzed the problems in the rooftop space through analysis of derived data, and suggested improvement plans.

A Study on the Change of Spatial Structures of Shared Space at Urban Campuses - The opposite concept of Gridlock upon the change to shared campuses - (도심 캠퍼스 공유공간의 공간 구조 변화에 대한 연구 - 그리드락의 반대 개념으로서의 공유 캠퍼스로의 변화에 대하여 -)

  • Kang, Eunki;Baek, Jin
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.34 no.11
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    • pp.145-156
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    • 2018
  • Urban campus, one of the main urban facilities, is the representative place that is struggling with 'gridlock'. Due to privatization of space among different departments and space shortages, gridlock has been occurring as a result. The urban campus trying to solve this problem by changing the quality of space, especially the structure of the shared space, which is expected to be the solution to the grid lock problem. The main purpose of this study is to investigate the structural change in the university's shared space based on paradigm transition. The theoretical consideration is to analyze the spatial characteristics of university shared space that appear at different stages through a new perspective that compares the gridlock phenomenon and the shared paradigm. The framework of the analysis of the shared space, which has recently been restructured, is classified into the spatial characteristics of collaborative space, the creative space, and the common/complex space. In addition, these spatial characteristics are again analyzed through the division of legislative facility classification, management governance subject, area, building location and layout, exposure to the outside as well as the analysis of student and staff entry and exit, sharing structure of site and space, and the classification of program characteristics. The results are as follows: The restructured space is systemized so that the management governance of each space would be connected to each other to share information and space. Furthermore, the spatial boundary between colleges or between campus spaces are not only physically, but categorically clear. The restructured space has semi (or in-between)-spatial characteristics such as the intersection in inside and outside of the pedestrian's circulation and the mixture of programs. This study could serve as principal references in presenting the systematic analysis of directions of the shared spatial structure for the urban campus where new educational space is required due to the changes in the university system.

A Study on the Concept and Type of Integration Senior Center - Focusing on the Development of the Network of Leisure Welfare Facilities for the Elderly - (거점경로당의 개념 및 유형에 관한 연구 - 노인여가복지시설의 네트워크 형성을 중심으로 -)

  • Song, Myung-Jong;Kim, Mo-Du;Lee, Hyo-Won
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.35 no.9
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    • pp.57-64
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    • 2019
  • Due to the rapid increase of the elderly population, promoted desire for recreational activities in old age and so emerging importance of Leisure welfare facilities for the elderly. Although Senior community centers playing an important role in old people leisure life are quantitative resources occupying majority of the Leisure welfare facilities for the elderly. there are many problems of managing programs, aging facilities, small spaces and so on. So, many facilities are used as simple meeting places of old people without solution about qualitative problem. Also, because of negative perceptions of people about Senior community center socially, desires of using Senior community center of old generation will decrease. In order to perfectly play a role of Leisure welfare facilities for the elderly, we need to review regulations about facility and program of Senior community center and suggest ways to resolve these problems. According to these necessity, Integration senior community centers appeared as a new concept. These centers compensate the physical defects through integrating small Senior community center. Through dividing function and service of senior welfare and forming networks between Senior community center and Senior welfare center, these centers set a goal of increasing quantitative and qualitative improving of leisure life of old people.

A Study on the Causes of Child Loss through Behavioral Analysis of Customers Accompanied with Children in Urban Entertainment Centers (복합상업시설에서의 아동 동반 고객 행태분석을 통한 미아 발생원인 고찰)

  • Choi, Jaepil;Choi, Soyoung;Yoo, Saewon;Han, Gyu Bin
    • Journal of the Architectural Institute of Korea Planning & Design
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    • v.36 no.1
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    • pp.49-60
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    • 2020
  • Although the number of child loss in commercial facilities has been growing recently, the prevention method for child loss are still lacking in the environmental aspect. This research examines the causes of lost child in behavioral aspects in order to develop a guideline to prevent child loss in U.E.C. The observational study on the behaviors of guardians and children was conducted in the U.E.C that is visited by many customers accompanied with children. Then the results of the observational study were marked on the behavioral maps. After analyzing the behavioral maps, the causes of child loss were determined by classifying into behaviors by age and behaviors by functional space. As a result, when guardian is unable to pay attention to child by doing something else such as making a purchase, or an inquiry, child may lose guardian by going towards the interesting factors or playing around. Moreover, if the spaces related to children are located at the node with high pedestrian density and open structure or the environment that is hard for the guardians to watch over their children, it will be easy for guardians to be inattentive to their children, and get separated from each other.

Fabrication and Performance Demonstration of the 20kW Class Inverted-type Cross-flow Turbine Based on Computational Fluid Dynamics Analysis (전산유체역학 해석에 기반한 20kW급 도립형 횡류수차의 제작 및 성능 실증)

  • Ham, Sangwoo;Choi, Ji-Woong;Jeong, Changho;Kim, Taeyun;Choi, Sangin;Jin, Glenn Young;Lee, Jeong Wan;Ha, Hojin
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.20 no.2
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    • pp.107-119
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    • 2021
  • The cross-flow turbine is one of the most famous and widely used hydraulic power systems for a long time. The cross-flow turbine is especially popular in many countries and remote regions where off-grided because of its many benefits such as low cost, high efficiency at low head, simple structure, and easy maintenance. However, most modern turbines, including the cross-flow turbine, are unsuitable for the ultra-low head situation, known as less than 3m water head or zero head with over 0.5m/s flow velocity. In this study, we demonstrated a 20kW class inverted-type cross-flow turbine's performance. First, we reevaluated our previous studies and introduced how to design the inverted-type cross-flow turbine. Secondly, we fabricated the 20kW class inverted-type cross-flow turbine for the performance test. And then, we designed a testbed and installed the turbine system in the demonstration facility. In the end, we compare the demonstration with its previous CFD results. The comparing result shows that both CFD and real model fitted on guide vane angle at 10 degrees. At the demonstration, we achieved 42% turbine efficiency at runner speed 125 RPM.

Decision Making Methods for Types of Roadside Non-point Pollution Reduction Facilities and Its Application (도로비점오염 저감시설의 유형선정방법 개발 및 적용)

  • Cho, Hye Jin
    • Ecology and Resilient Infrastructure
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    • v.7 no.4
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    • pp.256-261
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    • 2020
  • Roadside non-point pollution reduction facilities are classified as infiltration, vegetation, reservoir, and wetland types based on their respective pollution reduction mechanisms. However, without a detailed analysis of the road and traffic conditions it is very difficult for civil engineers to determine which category of pollution reduction facility is best suited to their planning requirements. To address this issue, we propose a new decision-making method for the selection of roadside non-point pollution reduction facilities. The principal factors informing the proposed decision-making methods are the road characteristics, including location, structure, number of lanes, and traffic volume. As a result of the study, a total of new pollution reduction plans were developed, with their selection conditions and the corresponding applicable facilities established. The effectiveness of the proposed pollution reduction schemes was demonstrated for roads in Kyounggi-do, providing a valuable basis for future pollution reduction plans.

Study on the Removal of the Cable Braid Inside the Missile (유도탄 탄내케이블 브레이드 제거에 따른 고찰)

  • Eun, Hee-hyun;Kim, Ji-min;Lee, Min-hyoung;Jung, Jae-won
    • Journal of Advanced Navigation Technology
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    • v.22 no.2
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    • pp.105-110
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    • 2018
  • The North Korea nuclear issue is now posing a serious security threat to the Korea and Northeast Asia. Accordingly, the South Korean military is pushing for the introduction of long-range air-to-surface flights and the development of domestic nuclear facilities that can precisely hit North Korea headquarters building and nuclear facility even hundreds of kilometers above the border. In this paper, we removed the cable braid for securing the weight of the missile among several design elements for long-range air-to-surface missile development and estimated and analyzed the resulting performance. The possibility of braid removal was analyzed in terms of crosstalk inside the cable and CS114, RE101 of MIL-STD-461F.

A Study on the Odor Removal Control System of Sewage Sludge

  • KIM, Su-Hye;LEE, So-Hee;YUN, Yeo-Jin;CHOI, Soo-Young;JUNG, Min-Jae;KWON, Woo-Taeg
    • Journal of Wellbeing Management and Applied Psychology
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    • v.4 no.2
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    • pp.19-25
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    • 2021
  • Purpose: The purpose of this study is to reduce odor complaints by identifying problems with odor management at the site of the water regeneration center and researching odor management methods. Due to the high population density of Korea, sewage treatment facilities are adjacent to residential and industrial areas. According to previous studies, the main malodor-emitting facilities of sewage treatment facilities were preliminary treatment facilities (2,220 times), sedimentation basins (4,628 times), and sludge treatment facilities (9,616 times). Research design, data and methodology: Compound malodors and designated malodor-producing substances were collected from five site boundaries of the water regeneration center and analyzed according to the official methods to test malodor, and a total of two times (August and September 2020) were conducted. Results: As a result of the measurement, in the green area in front of the center office, compound malodors were detected at a maximum of 8 times and at least 3 times during the dawn time. As for the designated malodor-producing substances, 0.1ppm of ammonia was detected in the green area in front of the center office and the park golf course. This is within 15 times the maximum allowable emission level of compound malodors and within 1ppm of the maximum allowable emission level of ammonia. Conclusions: Even if the dilution rate of the compound malodors did not exceed the maximum allowable emission level, the odor could be recognized, and more research is needed in the future to establish effective reduction measures according to the subjective and individual and seasonal odor characteristics.

A Study on the Establishment of Welfare Facilities for the Aged Using the Facilities Characteristics of Closed Schools - Focused on the Northern Area of Gyeonggi-Do - (폐교의 시설 특성을 활용한 노인복지시설 구축에 관한 연구 - 경기 북부지역을 중심으로 -)

  • Kim, Hak Cheol
    • Journal of the Korean Institute of Rural Architecture
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    • v.23 no.2
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    • pp.17-24
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    • 2021
  • Changes in the population structure caused by a decrease in the birthrate and an extension of life expectancy cause problems in utilization inefficiencies of closed schools and shortage welfare facilities for the aged. The closed schools have location characteristics that are close to the existing residence and facilities such as land and school buildings, so it is expected that the schools will be used as welfare facilities for the aged in the community. The purpose of this study is to compare and analyze the facility characteristics of closed schools in northern Gyeonggi-Do and present the types of aged welfare facilities that can be built, providing basic data for developing customized aged welfare facilities. The results of this study are summarized as follows: 1) The proportion of aged people in northern Gyeonggi-Do is higher than in southern Gyeonggi-Do, but welfare facilities for the aged are insufficient, so it is necessary to expand welfare facilities for the aged in northern Gyeonggi-Do. 2) Urban areas such as Paju and Goyang City have a lot of residential proximity, Dongducheon and Yangju have a lot of residential proximity, while schools located in urban and rural areas such as Yeoncheon have a lot of residential proximity. 3) Closed schools in urban areas such as Goyang City and Paju City are desirable to use them as residential facilities for senior citizens, day and night protection and short-term protection facilities, while closed schools in Namyangju City, Pocheon City, and Gapyeong County are desirable to use them as senior citizen centers and medical welfare facilities.