• Korean Journal of Construction Engineering and Management
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• v.11 no.6
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• pp.65-77
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• 2010

Our nation's housing construction is given much weight over 32% in 2007 and especially apartment is taking over 67%. If we put into construction environment consideration, we are having a trouble with price cap policy and the realestate recession due to the global economic crisis. So in order to get competitive power and supply of cheap apartment, the necessity of cost saving is increasing. This research collected the past constructed apartment project's cost saving examples which were influencing on the construction cost, quality and time. We analyzed collected cost saving datum and assorted these in compliance with classification system. By analysis of correlation among datum with exclusion and integration, we make a propose cost saving Checklist that will be a base data to give a chance to use in working level and other research.

• Journal of the Korea Institute of Building Construction
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• v.10 no.1
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• pp.181-191
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• 2010

Lightweight panels are currently used in many ways, such as inner walls of the skyscrapers and residential buildings in Korea. Moreover there has been an increasing of interest in developing construction method and quality improvement as many buildings became higher, because there are more advantages like constructability, finishability, and economic efficiency, etc. than previous heavy weight concrete wall. It is necessary to analyze the characteristics and evaluate the performance of lightweight panels when selecting proper methods and materials to building characteristics and builder's demand. However, there doesn't exist systematic data with a classification of lightweight panels' type and performance. The purpose of this study is to classify domestic lightweight panels by both type of exterior board and construction method, and also to evaluate each performance by surveying user's opinion.

• Journal of the Korea Institute of Building Construction
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• v.24 no.4
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• pp.495-506
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• 2024

Unlike reinforced concrete(RC) construction, the primary determinant of construction schedule for precast concrete(PC) apartment buildings is the lifting equipment. To establish a dry process-centric construction schedule, this study analyzes the lifting unit process for core, internal, and external PC wall components, which differ from traditional PC components. By examining the assembly process of these wall types, the study aims to determine the construction cycle for a standard floor frame of a PC apartment building. The findings will serve as foundational data for developing construction schedules for PC apartment buildings utilizing PC walls.

• JOURNAL OF ELECTRICAL WORLD
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• s.454
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• pp.64-67
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• 2014

전력산업 분야 공기업 이전과 관련해 가장 'Hot'한 지역이 바로 광주 전남공동혁신도시가 건설되고 있는 전남 나주이다. 혁신도시의 명칭은 '빛가람'. 빛가람이 주목받는 이유는 국내 최대 공기업인 한전을 비롯해 한전KPS, 한전KDN, 전력거래소 등 국내 전력산업을 이끌고 있는 핵심 멤버들이 모두 한 자리에 모이기 때문이다. 나주시가 '배'와 '곰탕'만큼이나 '전력산업의 메카'로 유명해지게 된 것이다. 한적하던 시골마을이 전력산업의 중심지로 탈바꿈, 전력산업의 핵심 멤버들이 이전해 오기만을 기다리고 있다.

• 월간 기계설비
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• s.240
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• pp.42-47
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• 2010

국토해양부(장관 정종환)는 두통, 아토피 등 새집증후군을 예방하고 공동주택 입주민들이 건강하게 거주할 수 있도록 “청정건강주택(Clean Healthy House) 건설기준”을 제정하였으며, 올해 12월 1일 이후에 주택건설사업계획승인 신청을 하는 1천세대 이상 신축 또는 리모델링 주택부터 적용한다고 밝혔다. 국토해양부가 청정건강주택 건설기준을 마련한 것은 현재의 "다중이용시설 등의 실내공기질 관리법" 등 새집증후군 관련 규정이 건축자재에서 발생하는 일부 유해물질의 실내공기中농도만을 규제함으로써 새집증후군 문제를 근본적으로 해결하는 데는 한계가 있으므로, 주택의 설계 시공부터 입주후 유지관리 단계까지 주택을 청정하고 건강하게 건설 관리할 수 있는 기준을 제시한 것이다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.282-283
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• 2010

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.32 no.2
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• pp.28-39
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• 2003

1998년 4월 일본 공기조화.위생공학회 북해도지부 설비기술연구회에서는 실무레벨의 "외단열건물의 열부하계산법"을 위한 소위원회가 발족되었으며, 1999년 11월에 연구보고서가 완성되었다. 이에, 일본 학회에서는 건축설비기술자협회 북해도 지부와 공동으로 실무자를 대상으로 세미나를 2000년8월에 개최하였다. 본 내용은 위원회보고서와 세미나에 서 거론된 "외단열건물의 열부하특성과 계산법의 요점"을 제시하고 이에 근거한 최대부하의 합리적인 설계와 불가분의 관계가 있는 "외단열건물을 위한 난방과 냉방을 통일한 열부하계산법의 개념"을 소개함과 동시에 "실무자의 과제와 금후의 전망"에 대하여 언급하고자 한다.

• Tunnel and Underground Space
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• v.22 no.2
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• pp.77-85
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• 2012

In a material, micro-cracks can be progressively occurred, propagated and finally lead to failure when it is subjected to cyclic or periodic loading less than its ultimate strength. This phenomenon, fatigue, is usually considered in a metal, alloy and structures under repeated loading conditions. In underground structures, a static creep behavior rather than a dynamic fatigue behavior is mostly considered. However, when compressed air is stored in a rock cavern, an inner pressure is periodically changed due to repeated in- and-out process of compressed air. Therefore mechanical properties of surrounding rock mass and an inner lining system under cyclic loading/unloading conditions should be investigated. In this study, considering an underground lined rock cavern for compressed air energy storage (CAES), the mechanical properties of a lining system, that is, concrete lining and plug under periodic loading/unloading conditions were characterized through cyclic bending tests and shear tests. From these tests, the stability of the plug was evaluated and the S-N line of the concrete lining was obtained.

• Tunnel and Underground Space
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• v.25 no.6
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• pp.568-576
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• 2015

In this study, scenarios based on the leakage of highly compressed air and fire occurrence turned out to be high risks in an operation stage of CAES facility were constructed and estimated. By combining Bernoulli equation with momentum equation, an expression to calculate an impact force of a jet flow of compressed air was derived. An impact force was found to be proportional to the square of diameter of fracture and the pressure of compressed air. Four types of fire scenarios were composed to evaluate an effects that seasonal change and location of fire source have on the spread behavior of smoke. Smoke from the fire ignited in the vicinity of CAES opening descended more quickly below the limit line of breathing than one from the fire occurred 10 m away from CAES opening, which is expected to occur due to a propagation of wave front of smoke. It was shown that a rate of smoke spread of the winter fire is faster than one of the summer fire and smoke from the winter fire spreads farther than one of the summer fire, which are dependent on the direction of air flow into access opening. Evacuation simulation indicated that the required safe evacuation time(RSET) of the summer and winter fires are 262, 670 s each.

• Korean Journal of Construction Engineering and Management
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• v.9 no.5
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• pp.104-115
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• 2008

Currently, reconstruction and remodeling are conducted to improve the performance of aged housing. Recently reconstruction has caused many problems such as wastes generation, wasting resources and real estate speculation, remodeling is drawing attention. Accordingly, remodeling business for aged housings gradually increasing, but the use of scheduling method not considering characteristics of remodeling deters construction in some construction types. Especially, in case of dismantling construction, the dismantling is delayed since the scheduling method not considering characteristics of remodeling is used. In case of remodeling, dismantling construction is ahead of other processes, if the dismantling construction is delayed, whole construction will be delayed and if speedy construction is conducted, the costs for remodeling will increase. Furthermore, existing remodeling for aged housing has been for rahmen(crossbeam and pillar) structure apartments, but since most apartments to be remodeled are wall-slab structure where dismantling takes a lot of weight, it is highly possible the dismantling construction is delayed. Thus, this paper is to establish scheduling method for the dismantling construction reflecting characteristic of remodeling to prevent delay of dismantling construction for remodeling of aged housing with wall-slab structure.