• Title/Summary/Keyword: 시공 단계

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Development of Design Process Management Model using Dependency Structure Matrix for Constructability (시공성을 위한 Dependency Structure Matrix 기반의 설계 프로세스 관리 모델 개발)

  • Park, Moon-Seo;Ham, Young-Jib;Lee, Hyun-Soo;Kim, Woo-Young
    • Korean Journal of Construction Engineering and Management
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    • v.11 no.5
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    • pp.65-74
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    • 2010
  • The design with construction knowledge and experience can eliminate inefficiency in the process of construction and improve productivity in all phase of construction project. To utilize constructability knowledge most effectively in design phase, the information must be made available to the design team at the proper point in time. Current methods for effective utilization of constructability knowledge have focused on the structuralization of constructability knowledge such as checklist, which lack the consideration of the proper point in time. However, constructability knowledge which is used at the inapposite point in time consequently leads to unnecessary rework. To minimize this inefficiency and improve productivity, project manager needs to consider the design process and know what constructability knowledge is required for specific design activities. This paper therefore presents a design process management using Dependency Structure Matrix (DSM) that focus on information flows between design activities and constructability knowledge. We expect that the results of this paper will support that design process management become comprehensive management related to every phase of construction project beyond design review or inspection in design phase, and be used as a basis of the integration of design and construction.

Analysis of the Effect of Seismic Loads on Residential RC Buildings using the Change in Building Size and Return Period (건물 규모 및 재현주기 변화에 따른 주거용 RC건물에 대한 시공 중 지진하중의 영향 분석)

  • Seong-Hyeon Choi;Jae-Yo Kim
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.36 no.2
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    • pp.85-92
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    • 2023
  • Unlike a completed building, a building under construction may be at risk in terms of safety if a load exceeds the value considered in the design stage owing to various factors, such as a load action different from that in the design stage and insufficient concrete strength. In addition, if an earthquake occurs in a building under construction, greater damage may occur. Therefore, this study studied example models with various sizes of 5, 15, 25, and 60 floors for typical building types and analyzed the effects of seismic load on buildings under construction using construction-stage models according to frame completeness. Because the construction period of the building is much shorter than the period of use after completion, applying same earthquake loads as the design stage to buildings under construction may be excessive. Therefore, earthquakes with a return period of 50 to 2,400 years were applied to the construction stage model to review the seismic loads and analyze the structural performances of the members. Thus, we reviewed whether a load exceeding that of the design stage was applied and the return period level of the earthquake that could ensure structural safety. In addition, assuming the construction period of each example model, the earthquake return period according to the construction period was selected, and the design appropriateness with the selected return period was checked.

Nonlinear Analysis of Segmentally Erected Prestressed Concrete Cable-Stayed Bridges (시공단계를 고려한 프리스트레스트 콘크리트 사장교의 비선형 해석)

  • Lee, Jae Seok;Kang, Young Jin
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.14 no.1
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    • pp.49-62
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    • 1994
  • An analysis method for the time-dependent nonlinear analysis of segmentally erected planar prestressed concrete cable-stayed bridges was described. To account for the time-dependent effects, load history, creep, shrinkage. aging of concrete and relaxation of prestress were considered. Changes in boundary conditions and loads, installing and removing frame elements, stressing, restressing and removing cables and prestressing tendons were incorporated for modeling segmental erection operations. One typical example on segmentally erected prestressed concrete cable-stayed bridge was presented to illustrate the analysis method. Results of this example show that it is important to follow the development of stresses and deformations at all stages of construction to predict the true response of the bridge through its various load history.

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Improving Constructability for Partnering in Large Hospital Construction Projects (대형병원 프로젝트의 시공성 증대를 위한 파트너링 모델 구축)

  • Kim Sang-Il
    • Korean Journal of Construction Engineering and Management
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    • v.5 no.3 s.19
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    • pp.153-165
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    • 2004
  • Most engineering tasks require collaboration between many users in major hospital construction projects that have many reconstructions. Loss and change orders occurred in factors such as information exchange, misunderstandings, advanced technology in hospital projects. Moreover, changes in context, costs, requirements, deadlines, etc. require negotiation of issues that may modify important project characteristics. The objective of this paper is to reduce reconstruction for the pre-construction process of hospital projects, reconstruction factors were analyzed in recent hospital construction project the system was established in order to solve reconstruction factors, and this system was validated through applying to the real project. Therefore it is a major challenge to make high level of communication and to have mutual understanding.

플로팅 함체의 시공단계별 수직처짐의 영향

  • Lee, Yeong-Uk;Chae, Ji-Yong
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2012.06a
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    • pp.422-424
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    • 2012
  • 본 연구에서는 수상위에 진수된 콘크리트 플로팅 폰툰에 상부골조를 단계별로 시공함에 따라 발생하는 추가 처짐이 상부골조에 미치는 영향을 고찰하고 하였다. 이러한 추가변형에 의한 상부골조에 추가 모멘트량을 산정하는 해석절차를 제시하였으며 제시된 절차에 따라 3층 예제 철골 건물을 해석하고 분석하였다. 제시된 시공단계를 고려한 해석 방법과 비교하여, 상부골조를 지반위에 고정하여 모델링하는 일반적인 해석은 수직하중에 의한 변형을 무시하여 설계하중을 과소평가 하며, 플로팅 구조물을 전체적으로 모델링하고 하부 폰툰에 등가의 스프링으로 치환하여 하중을 동시에 재하하는 모델은 과대한 처짐의 영향으로 설계하중을 과대 평가함을 알게 되었다.

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Regularization Length in Single Plane Cable-stayed Concrete Bridge (1면 케이블 콘크리트 사장교의 응력 불균일 영역길이)

  • Kang, Ho-Jun;Jang, Jae-Youp;Kim, Gwang-Soo;Lee, Hwan-Woo
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2010.04a
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    • pp.10-13
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    • 2010
  • 세그먼트 자중 등에 의한 휨모멘트와 케이블 수직압축력에 의한 합성응력이 발생되고 바닥판 경간비가 변하는 사장교의 시공단계에서는 전단지연의 영향범위가 다를 수 있다. 이 연구에서는 1면 케이블 콘크리트 박스 사장교를 대상으로 시공단계시 보강형에 고려되어야 할 합성응력에 의한 유효플랜지폭을 분석하였다. 그 결과 바닥판 경간비가 0.38 이하의 범위에서 보강형의 전폭을 유효플랜지폭으로 적용할 수 있는 것으로 해석되었다. 따라서 시공단계시 변화되는 바닥판 경간비의 크기에 관계없이 전폭을 유효플랜지폭으로 반영하는 실무관행은 안전측 설계가 되지 못할 수 가 있다. 바닥판 경간비가 작아짐에 따라서는 전폭과 캔틸레버 구조계로 유효플랜지폭을 결정하는 것이 타당하다. 이 연구에서는 수직력에 대한 도로교설계기준의 유효플랜지폭 규정에 대한 평가도 수행하였다.

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The Design and Construction Management of Exposed Concrete Finish Work through the Construction Process Analysis (노출콘크리트 마감공법의 시공 프로세스 분석을 통한 설계 시공관리 방안)

  • Song, Young-Woong;Choi, Yoon-Ki
    • Korean Journal of Construction Engineering and Management
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    • v.6 no.6 s.28
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    • pp.160-170
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    • 2005
  • Because designers want to express various elevation, architectural concrete has recently paid attention to finish material and has increasingly used in the construction. architectural concrete needs more careful and professional supervision works such as controling quality of color, texture, construction plan, and design plan. none the less, It is not clear to define process and manage methods for the construction life-cycle, which causes the expense to increase and the quality to be poor. this study will analyze concrete finish method by dividing three parts which are common, exposed and architectural concrete finish method. definition and the limit of application in architectural concrete finish method will be present by comparing three methods. Throughout an interview with a staff in charge and a case study, this paper shows the requirement and the keynote of management which are divided by three steps; the design, construction and maintenance. finally, this research provides management methods of individual steps for effective construction.

Applications of Construction Sequence Analyses to Prototype Models of Twisted Tall Buildings (비틀림 초고층 프로토타입 모델에 대한 시공단계해석의 적용)

  • Choe, Mi-Mi;Kim, Jae-Yo;Eom, Tae-Sung;Jang, Dong-Woon
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.26 no.1
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    • pp.89-97
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    • 2013
  • With regard to complex-shaped tall buildings whose plans and constructions have been gradually on the increase, this study was aimed to analyze their structural behaviors during construction by applications of construction sequences analyses to prototype models. For twisted tall buildings, total 18 models of with three conditions of a lateral load-resisting system, a twisting angle, and a construction method were selected. A diagrid system and a braced tube system were applied as a lateral load-resisting system. For each lateral load-resisting system, three types of plan with $0^{\circ}$, $1^{\circ}$, and $2^{\circ}$ twisting angles and three construction methods with construction sequences of exterior tube and interior frame were assumed. The structural performances of tall buildings under constructions were analyzed with results of lateral displacements from construction sequence analyses. Also, construction performances of the construction period and the maximum lift weight were compared.

Safety Management Factor Analysis of Expert Perceptions Based on 4M Method for Plant Construction Phase (플랜트 시설물 시공단계의 4M기법을 활용한 전문가 인식조사에 의한 안전관리요인 분석)

  • Kim, Kyujin;Choi, Byungsun;Chun, Jaeyoul
    • Korean Journal of Construction Engineering and Management
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    • v.17 no.1
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    • pp.18-27
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    • 2016
  • The purpose of this study is to classify main risk factors on a construction phase of a plant project and analyze importance by the risk factors. Plant Industry is continuing boom and the increase in overseas plant orders in 2014 has showed a performance increase of 61% of the total orders, as the plant industry are risk factors for the construction phase, safety management target recognition and variety of accident prevention and safety factors by importance, etc. a situation that requires the development and introduction of management. So, it is performed that collected disaster conditions data on a construction phase of a plant project, is questioned by plant construction professional and is classified by 4M. Then, it is performed that is questioned by plant construction and safety professional in order to apply AHP method, and is presented from analyzing the risk factors, which are results of the survey, by importance and priority. This study will recognize from identifying the main risk factors in advance and will be utilized as a basic data is to prevent the risk factors.