• 한국건축시공학회지
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• 제12권6호
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• pp.682-700
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• 2012

Over the last several years, Korea has increasingly adopted design-build for public construction projects. There is a much greater awareness of the need to change to a system based on 'Value for Money', which is high on the government's agenda. A whole life performance bid evaluation model is proposed to aid decision makers in the selection of a design-builder. This is based on the integration of a framework using an analytic hierarchy process, as the bid awarding system is being changed from one based on the lowest price to one based on best value over the life-cycle. Key criteria such as whole life cost, service life planning and design quality are important through the key stages of the evaluation process. The model uses a systematic and holistic approach, which enables the public sector client to make better decisions in design-builder selection, which will deliver whole life benefits based on long-term cost-effectiveness.

• 유공압시스템학회논문집
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• 제8권1호
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• pp.1-9
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• 2011

The main design factors which effect on operating speed of linear actuator for valve operation are mass of plunger, electromagnetic motive force, inductance, and return spring, and these factors are not independent but related with each other in view point of design and electromagnetic theory. It is impossible to increase the operating speed by only change the value of any one design factor. The change of any one value results in change of any value related it in various design factors. This paper presents a speed increasing method of linear actuator using a solenoid design method by some governing equations which are composed of electromagnetic theory and empirical knowledge and permanent magnets as assistant material, and proved the propriety by experiments.

• 한국안전학회지
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• 제29권1호
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• pp.37-40
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• 2014

Article 29(3) of Occupational Safety And Health Act, which states a contractor can request a design change to an employer of businesses under the risk condition of construction of temporary structure, was established. Accordingly, in this study, recent fatal accidents caused by temporary structures were analyzed, and the level of inclusion of temporary structures in the design document were examined, and high risk temporary structures were classified. In addition, the requirements of design change of temporary structures were presented, and the qualifications of expert to certify the design change were proposed.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.521-524
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• 2013

Schedule management of construction work is important in order to complete construction projects within a given period of time. Many efforts have been made and many tools have been developed in order to manage construction projects by a smart device such as smart phones and smart pads. This research proposed a basic design to manage construction schedules via a smart device using Flash. The interactive and graphic property of Flash enables a field manager to manage schedules easily and efficiently. A basic structure was designed for a user to be able to make and change a schedule by touching the smart device's screen. And a prototype was implemented by Adobe Flash/Flex Builder, it is applied to a sample network in a smart phone.

• 한국건설관리학회논문집
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• 제9권3호
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• pp.65-74
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• 2008

국내 건설산업의 공공 발주자는 사업의 초기단계의 사업비관리에 대한 중요성을 충분히 인식하고 있음에도 불구하고 체계화된 공사비 산정시스템을 보유하고 있지 못한 실정이다. 이에 신규 공공 건설공사를 기획하고 사업비를 책정하는 단계에서는 예산을 수립하는 담당자가 기존의 실적데이터와 경험을 바탕으로 공사비를 추정하고 있으며, 기본설계단계와 실시설계단계 이후 산정된 공사비를 책정된 예산과 비교 후 사업의 추진여부를 검토하거나 설계내용을 예산에 맞도록 변경하고 있다. 이에 본 연구에서는 공공아파트의 사업초기단계에서 공사비를 산정할 수 있는 공공아파트 계획설계단계에서의 공사비 예측모델을 개발하고자 하였다. 본 연구의 결과를 바탕으로 계획설계단계에서 공사비를 예측하고 사업비 및 전반적인 설계를 관리한다면 지금보다 더 효율적인 방법으로 국가의 재원을 적절하게 책정하고 집행할 수 있을 것으로 판단된다.

• 한국건설관리학회논문집
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• 제4권4호
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• pp.137-144
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• 2003

Recently, the interest in a complex building increases rapidly in Korea. High-rise complex is not simply the combination of a residential apartment and a business office as previous but a building with the object of the convenience of the residents familiar with city-life style through adapting the high class life style and new residential culture to the business space, and the efficiency in using the limited building site in the town. This study presents an exploratory analysis focusing the structural system with the help of the extensive survey of the construction site in Korea, and aims a guideline for the structural design and construction of high rise complex. Through the survey, change and development in the design and the construction can be seen as the height and size of the complex grow. It is almost indispensable to design a structural system against lateral forces like earthquake or wind, which is usually measured by story drift ratio or story displacement. Improvement of the structural materials and their usages is also included for the efficiency of the structural system. Useful slab-beam system contributing to the decrease of the story height is still a concern.

• 국제초고층학회논문집
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• 제13권1호
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• pp.97-102
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• 2024

In this paper, we would like to share our ongoing research on global population and demographic shifts and the corresponding need for diverse responses. As population growth varies worldwide, the pressing issue is the current global housing shortage. The USA alone lacks 4 million homes, underlining the urgency for new construction and renewal of existing. Our focus is primarily on new building processes, which must also incorporate elements of renewal for future sustainability. Our research addresses several key questions: How will roles for construction professionals change? What should be the primary goal of the design process? What types of technologies are currently available, and which aspects of the process can be enhanced with AI? A significant part of our study is exploring sustainable building methods that reduce embodied carbon and increase speed of construction. Our goal is to extend the transition from smart homes to cities, analyzing the evolution towards smart communities and cities. A critical aspect of our research is the 'kit of parts concept, involving prefabrication and modular construction. This approach is essential for both rebuilding and new projects, potentially lowering costs in manufacturing and design for long term. Lastly, we present a detailed comparison of the construction industry with manufacturing.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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• pp.520-525
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• 1996

Recently, the prestressed concrete long-span bridegs are increasingly built at various locations in the world. The mechanical and structural behavior of prestressed concrete bridges is very complex because of nonlinear and time-dependent material behavior and sequential change of structural system due to stepwise construction. These factors may cause construction errors with respect to design value and monitoring system is needed to minimize or to protect construction errors. This study presents the basis development of monitoring system for precise construction of large scale prestressed concrete bridges.

• 한국건설관리학회논문집
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• 제7권1호
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• pp.110-118
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• 2006

현행 일괄입찰방식은 분담이행방식의 공동도급형태로 운영되고 있어, 참여업체간의 의사소통 부족으로 설계기술과 시공기술의 접목이라는 일괄입찰방식 본래의 취지를 살리지 못하고 있다. 또한 입찰을 통해 확정된 총액금액으로 설계가 진행되므로 실시설계단계에서 VE활동을 통한 원가절감 노력이 거의 이루어지지 않고 있는 실정이다. 이에 본 연구에서는 현행 설계시공일괄방식의 특성을 파악하고 설계VE 적용사례를 분석하여, 설계VE 적용의 문제점이 무엇인지를 파악한 후, 일괄입찰사업 수행절차에서 설계VE 적용의 효과를 극대화할 수 있는 파트너링의 활용방법 및 그 적용시기를 제안한다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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• pp.256-257
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• 2019

Recently, the fire risk of architectural structures is increasing due to the super high - rise and super - size of the buildings. Therefore, the direction of fire safety design tends to change from the existing design to the performance - based design. In particular, domestic fire safety policies are divided into building law and fire fighting law. In case of fire fighting law, performance design is already carried out. Therefore, this study summarizes the prediction formula for fire characteristics among the structural fireproofing design field as shown in Fig. 1 according to this situation, and compares it with the standard method of each country in particular.