• 한국강구조학회 논문집
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• 제19권1호
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• pp.15-27
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• 2007

지난 10년간 건설 환경에서 노무비는 재료비에 대해 상대적으로 계속해서 증가하고 있다. 따라서 강구조물의 최적 설계를 위해 널리 쓰이고 있는 최소중량설계는 더 이상 최소경비설계를 의미하지 못한다. 최근의 강 구조물의 제작 시 재료비 외에 부재연결에 소요되는 경비가 실제로 총 제작비에 커다란 영향을 미치는 것을 알 수 있다. 그럼에도 불구하고 대부분의 연구가 최소 중량설계나 구조물의 고등해석에만 이루어지고 있다. 따라서 본 연구는 횡 방향 하중에 효과적으로 저항하도록 보와 기둥이 모멘트 연결된 강 뼈대 구조물을 대상으로 안정성에 문제가 없이 경비절감에 효과적인 설계를 위해 재료비뿐만 아니라 제작비 및 현장에서 가설 시 부재연결에 소요되는 경비를 포함하는 최소 경비 설계를 수행하고자 한다. 하중저항계수설계법에 따른 전단과 처짐 및 보-기둥 상관관계식을 포함하는 비선형 해석과정과 유전알고리즘을 바탕으로 한 최적화 알고리즘을 결합하여 모멘트 부재연결의 수를 줄이고 또한 효과적인 배치를 수행함으로 최적 설계 해 및 모멘트 연결의 수와 총 경비와의 상반관계를 나타내고 이로부터 최적의 모멘트 연결의 수 및 그 배치를 구하였다. 현실적인 하중조건을 고려한 수치 예를 통해 본 연구의 적용성과 효율성을 나타내었다.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2003년도 Proceedings of the international symposium on the fusion technology
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• pp.184-191
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• 2003

In this paper, a mathematical framework based on a homogenisation technique to simulate 'umbrella arch reinforcement system' (UARS) and its implementation into a 3D Finite Element program that can consider stage construction situations are presented. The constitutive model developed allows considering the main design parameters of the problem and only requires geometrical and mechanical properties of the constituents. Additionally, the use of a homogenisation approach implies that the generation of the Finite Element mesh can be easily produced and that re-meshing is not required as basic geometrical parameters such as the orientation of the pipes are changed. The model developed is used to simulate tunnelling with the UARS. From the analyses, the effects of the main design parameters on the elastic and the elastoplastic analyses are considered.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1998년도 가을 학술발표회 논문집
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• pp.151-158
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• 1998

This paper presents an optimal decision model for minimizing the life-cycle cost of steel box girder bridges. The point is that it takes into account service life process as a whole, and the life-cycle costs include initial (design, testing, and construction) costs, maintenance costs and expected failure costs. The problem is formulated as that of minimization of expected total life-cycle cost with respect to the design variables. The optimal solution identifies those values of the decision variables that result in minimum expected total cost. The performance constraints in the form of flexural failure and shear failure are those specified in the design code. Based on extensive numerical investigations, it may be positively stated that the optimum design of steel box girder bridges based on life-cycle cost approach proposed in this study provides a lot more rational and economical design, and thus the proposed approach will propose the development of new concepts and design methodologies that may have important implications in the next generation performance-based design codes and standards.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.331-337
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• 2009

This paper summarizes some of approaches that could be taken for data exchange in a non-interoperable work environment and reports lessons learned from the Dongdaemun Design Plaza and Park project. Today's widespread application of building information modeling (BIM) to the construction and architectural design industries requires a change in the cooperation between business organizations and their methods of communication. In particular, the interoperability of information between interdisciplinary organizations, which use specific programs for different purposes, has become a critical issue. More than just a technical problem, it is also highly related to an organization's collaboration culture and the particulars of a specific project. This paper describes the interoperability issue that occurred during the construction documentation phase of the irregularly shaped building project, Dongdaemun Design Plaza and Park, designed by Zaha Hadid Architects and Samoo Architects and Engineers, from the perspective of the technological problem and the collaborative organizations' communications. Although the perfect compatibility of information is not possible, this paper deals with a practical approach to the interoperability issue by examining the way the end-users of computer-aided design (CAD) resolved the interoperability problems in practice.

• 대한안전경영과학회지
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• 제13권1호
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• pp.51-58
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• 2011

The uniformity of lighting distribution on the roadway is essential factor for drivers and pedestrians's safety during nighttime in urban streets. Also, the importance of roadside trees is one of the growing concern for better citizens' health and mitigating environmental impact on the urban street. But roadway lightings and roadside trees have different design or planting standards and they are not integrated in the systemic viewpoint for better safety of users during nighttime. The purpose of this study is to propose a simulation approach which assesses lighting quality in the view of illumination uniformity distribution of roadway lighting from design step and consider the layout of roadside trees. For improving lighting quality of roadway, simulation approach is needed for assessing the impact of diverse planting situation of trees and encouraged from beginning of design step for roadway construction.

• 한국건설순환자원학회논문집
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• 제3권2호
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• pp.115-121
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• 2015

본 연구에서는 $CO_2$ 배출 저감을 위한 저탄소 콘크리트 구조물 설계 절차를 제시하였다. 전과정 $CO_2$ 평가에 기반한 저탄소 콘크리트 구조물 설계 절차는 ISO 13315-2에서 요구하는 시스템 경계를 이용하였으며 구조물의 전과정 평가를 수행하기 위한 전과정 목록(life-cycle inventory, LCI)은 기본적으로 국가에서 구축한 LCI 데이터베이스 정보망을 이용하였다. 본 연구에서 제시한 절차에 따라 전단벽 콘크리트 구조물을 대상으로 전과정 $CO_2$ 평가에 대한 사례분석을 수행하였다. 기둥부재의 경우 GGBS 25% 치환 시 재료단계, 해체 및 파쇄단계, 운송단계에서 $CO_2$ 발생량 및 탄산화에 의한 $CO_2$ 포집량은 모두 감소하는 것으로 나타났으며 OPC 대비 약 26% 감소하는 것으로 나타났다. 기둥, 벽체, 보 및 슬래브 전체의 경우 GGBS 25% 치환에 따라 전과정 $CO_2$ 발생량이 약 22% 저감하는 것으로 나타났다.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.808-813
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• 2005

Effective cost management requires reliable cost estimates at every stage of project development. The primary purpose of this research is to develop systematic modeling procedures and an automatic computing program for infrastructure estimating in the Texas Department of Transportation (TxDOT). The computing system toggles between project input information and segregated district unit prices for highway work item quantity estimates associated with earthwork and landscape, subgrade treatments and base, surface courses and pavement, structures, miscellaneous construction, and lighting, signing, markings and signals. This quantity-based approach was chosen because of the conventional approach lacking of quantity information until primary design is complete.

• 대한토목학회논문집
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• 제34권6호
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• pp.1881-1891
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• 2014

2010년부터 턴키심의위원 풀 제도를 폐지하고, 상설심의위원 제도를 도입하여 현재까지 턴키입찰공사는 설계적합최적가방식, 종합평가방식으로서는 입찰가격, 설계점수조정, 가중치기준, 확정금액최상설계방식의 5가지 낙찰자 결정방식으로 선정하고 있다. 또한 낙찰자 결정방식으로서 설계심의분과위원회를 크게 중앙 지방 특별 설계자문위원회의 분과위원으로 구성하여 운영하고 있으나, 아직 로비 부담에 대해서 개선되지 못한 것은 심의위원 풀제에서 상설심의위원으로 심의 주체만 변경되었을 뿐, 턴키입찰에서 설계심의가 가지는 비중과 설계심의방식도 과거와 유사하기 때문이다. 그러므로 가격경쟁을 부분적으로 강화하여 설계점수가 낙찰을 좌우하는 풍토를 개선하고, 기술경쟁은 영업력보다 실질적인 기술력이 경쟁력을 가질 수 있도록 설계심의제도를 개선하는 것이 필요하다. 이에 이 연구는 낙찰자 결정방식의 설계심의 운영제도와 문제점 그리고 개선된 설계심의방안을 제시하였다.

• 한국BIM학회 논문집
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• 제13권4호
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• pp.36-44
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• 2023

Recently in Korea, efforts are underway to enhance smart construction by implementing Building Information Modeling (BIM) comprehensively across all sectors of the construction industry. This study focused on the adoption of BIM for prefab bridges currently executed in the industry and It examined the process of creating a BIM-based prefab bridge model that can support production. Additionally, it explored how prefab products made by manufacturers can be integrated with road alignments using BIM technology and how the DfMA (Design for Manufacturing and Assembly) approach, which supports production based on designed information, can be adopted. The process of creating the prefab bridge model aims to shorten production time, reduce costs, and enhance quality by leveraging digital information related to design and manufacturing within the BIM framework

• Geomechanics and Engineering
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• 제32권2호
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• pp.209-232
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• 2023

A comprehensive study was conducted to design economical foundations for a number of buildings on soft cohesive soil in the southern coastal regions of Iran. Both static and seismic loads were considered in the design process. Cyclic experiments indicated that the cohesive soil of the area has potential for softening. Consequently, the major challenge in the design stages was relatively high dimensions of settlement, under both static and seismic loadings. Routine soil-improvement methods were too costly for the vast area of the project. After detailed numerical modeling of different scenarios, we concluded that, in following a performance-based design approach and applying a special time schedule of construction, most of the settlement would dissipate during the construction of the buildings. Making the foundation as rigid as possible was another way to prevent any probable differential settlement. Stiff subgrade of stone and lime mortar under the grid foundation and a reinforced concrete slab on the foundation were considered as appropriate to this effect. In favor of an economical design, in case the design earthquake strikes the site, the estimations indicate no collapse of the buildings even if considerable uniform settlements may occur. This is a considerable alternative design to costly soil-improvement methods.