• Title/Summary/Keyword: Re-construction

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Establishment of Disaster Response and Safety Management Systems in LH

  • Kim, Sang-Yeon
    • International conference on construction engineering and project management
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    • 2015.10a
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    • pp.56-57
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    • 2015
  • This study is to review and re-establish LH disaster response and safety management system of the construction site and rental apartment complex in order to make an effective response and minimize damage in the face of disaster. I suggest directions for the improvement of disaster management systems. To achieve this, I reviewed the existing disaster response organization and accept opinions of the operating department in order to constitute effective organization which respond quickly and efficiently in emergency, and assigned new roles and responsibilities at each organization. Furthermore, I setup and suggested response manuals for each possible disasters.

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The construction management of BIM-based small building remodeling. (BIM 적용을 통한 소규모 건물 리모델링 시 현장시공관리)

  • Jung, Tae-Ho;Kim, Sang-Won;Park, Seung-Hwan;Hong, Seong-Wook
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2012.05a
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    • pp.191-192
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    • 2012
  • The BIM(Building Information Modeling) introduction of the construction and maintenance at the design phase through the life cycle of the building until it is destroyed, I will bring big changes in the process. If you are building a small action by a variety of variables difficult to manage on-site construction, but, BIM remodeling of the building by applying a small improvement in the quality of imported building and construction delays, such as design changes or re-construction by removing the elements of economic 04 to make. Since the early stages of applying BIM to complement the introduction part, but the future seems to lead to changes in the built environment, academics and practitioners of the construction industry seem to have an active research.

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The re-estimating on the aumount of agricultural water use in Korea (우리 나라 농업용수 이용량의 재산정(관개배수 \circled2))

  • 김현영;심문산
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2000.10a
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    • pp.157-161
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    • 2000
  • The peculiarity of agricultural water in Korea is taking advantage of the effective rainfall and return flow in consumptive use. The agricultural water which the Ministryof Construction figured out in 1989 was excluded these traits. As a result of the re-estimating amount of agricultural water in 1999, we can presume it up to 14.9 billion m$\^$3/ to 22.6 billion m$\^$3/ per year.

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Properties of Polymer Modified Mortars Substitution Re-dispersible Polymer Powders (재유화형 폴리머를 첨가한 폴리머시멘트 모르타르의 특성)

  • Jang, Kun-Young;Ryu, Dong-Woo;Jeon, Chan-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.19-20
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    • 2018
  • For this study, a test was conducted on the basic polymer property depending on the replacement amount of polymer. The result showed that the flow of slump was increased with the increase of polymer replacement amount and an amount of air entraining. In addition, with a decrease of unit W/B, an amount of bleeding was reduced, and the first and final time for 6% replacement amount was found to be the fastest. This implies that replacement of more than 6% may affect the hydration of cement.

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Bond Properties of Polymer Cement Mortar to Reinforced Steel Bar (폴리머 시멘트 몰탈의 철근 부착특성 평가)

  • Park, Dong-Cheon;Cho, Gyu-hwan
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.11a
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    • pp.106-107
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    • 2013
  • The purpose of this study is to characterize the bonding properties between reinforced bar and re-emulsion polymer cement mortar through the pull off test. The properties of polymer cement mortar before and after hardening were measured. Spiral reinforced steel bar was used to control the brittleness fracture of test specimens. In addition polymer content as experimental factors, the types of reinforced bar and corrosion were considered as well. Non linear FEM analysis was carried out to expect the behavior of bonding interface under the certain load.

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Temperature History of Inner-form and Re-bars in Aluminum Concrete form During a Cold Weather Condition (한중 환경에서 알루미늄 폼 내부 철근의 직경변화에 따른 온도 특성)

  • Jung, Sang-Woon;Kim, Kyoung-Hoon;Heo, Young-Sun;Han, Min-Cheol;Han, Cheon-Goo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.05a
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    • pp.113-114
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    • 2013
  • This study is to investigate the effect of the diameter of reinforcement bars located in an aluminum-form on the temperature histories of the re-bars before placing concrete during a cold weather condition. The diameters of reinforcement bars with 13 mm, 19 mm, 25 mm and 32 mm were prepared for the experimental tests. Results showed that the larger the size of the diameter of the bars, the higher were the temperature drop. However, this study found that its effect on the temperature drop of the bars was insignificant.

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Comparison on of Activation Functions for Shrinkage Prediction Model using DNN (DNN을 활용한 콘크리트 건조수축 예측 모델의 활성화 함수 비교분석)

  • Han, Jun-Hui;Kim, Su-Hoo;Han, Soo-Hwan;Beak, Sung-Jin;Kim, Jong;Han, Min-Cheol
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.11a
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    • pp.121-122
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    • 2022
  • In this study, compared and analyzed various Activation Functions to present a methodology for developing a natural intelligence-based prediction system. As a result of the analysis, ELU was the best with RMSE: 62.87, R2: 0.96, and the error rate was 4%. However, it is considered desirable to construct a prediction system by combining each algorithm model for optimization.

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A Method of All-Weather Construction Application in Construction Sites (건설분야 전천후 공법 적용방안)

  • Lee, Han-Woo;Lee, Byung-Soo;Bang, Chang-Joon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2012.11a
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    • pp.193-194
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    • 2012
  • Construction work is affected by the weather; e.g. snowfall, rainfall and low-high ambient temperature, especially at a site in a severe climate. The influence of the weather is one of the possible reasons for delays in a construction schedule and quality deterioration. To protect the worksite from severe weather conditions, the temporary roof and wall could be installed on the outside of main structures designed in advance and the temporary structures could be took down after a period use. The greater coverage all-weather construction method is applied, the larger the effect. so, it is important and needs that the temporary roof and wall can be widely applied, designed to effectively about structure and layout.

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Characteristics of Splitting Solid Amount by Friendly Environmental CFB Boiler's Particle Re-circulating Device (환경친화적 CFB 보일러 입자재순환 장치의 고체량 분배 특성)

  • Kim, You-Seok;Hwang, Jae-Dong;Choi, Yong-Joon;Moon, Kil-Ho;Shun, Do-Won;Bae, Dal-Hee
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.1756-1760
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    • 2004
  • Circulating Fluidized-Bed (CFB) boilers which have been operated in Korea were manufactured by the design technology of foreign leading companies. As they are not active to transfer their technology, domestic companies don't have the enough ability to design it independently yet. Doosan Heavy Industries & Construction Co. Ltd. and Korean Institute of Energy Research are trying to develop and improve the particle re-circulating device among the components of CFB boiler. Our purpose is to control the amount of particles leaving the re-circulating system by adjusting utility air and reuse the heat of circulating particles. The results of experiments with cold model system show that a fluidization state in the particle re-circulating device is very stable when the amount of utility air is supplied to its wind box with 2.29 times of minimum fluidization velocity. Also the amount of particles entering the riser don't increase linearly when the amount of utility air is supplied over 2.5 times of minimum fluidization velocity. Now we are testing its functional run with the hotstate experiment set-up.

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Effect of Re-liquefaction System on Operating Expenditure of LNGC in Terms of Fuel Oil Consumption Cost and BOG Combustion Cost (천연가스 운반선의 재액화 장치가 운항비용에 미치는 영향에 관한 연구: 연료비용 및 증발 가스 연소비용 관점에서)

  • You, Youngjun;Lee, Joon Chae
    • Journal of the Society of Naval Architects of Korea
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    • v.57 no.3
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    • pp.152-159
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    • 2020
  • Ship owners had pursued higher benefits by demanding the new design and construction of ships with higher operational efficiency. There was a necessity for shipyards to suggest a more economical design and advanced operation concept in order to meet the demands. Especially, since BOG combustion and activation of the re-liquefaction unit had to be taken into account in ship design in addition to fuel oil and gas consumption, the evaluation of the operating efficiency considering the technological trends was necessary. In this paper, it was aimed to study the design philosophy and operation strategy by considering the effect of fuel oil and gas consumption, BOG combustion, and activation of the re-liquefaction unit on the operating cost for laden voyage according to ship speed, BOR, and activation of the re-liquefaction unit. For this purpose, the costs were acquired by conducting the sailing simulation of an LNGC based on a mathematical model including the maneuvering equations of motion. The design philosophy and operation strategy was reviewed in terms of the operating cost.