• 제목/요약/키워드: design and construction approach

검색결과 784건 처리시간 0.029초

Hierarchical multiscale modeling for predicting the physicochemical characteristics of construction materials: A review

  • Jin-Ho Bae;Taegeon Kil;Giljae Cho;Jeong Gook Jang;Beomjoo Yang
    • Computers and Concrete
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    • 제33권3호
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    • pp.325-340
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    • 2024
  • The growing demands for sustainable and high-performance construction materials necessitate a deep understanding of their physicochemical properties by that of these heterogeneities. This paper presents a comprehensive review of the state-of-the-art hierarchical multiscale modeling approach aimed at predicting the intricate physicochemical characteristics of construction materials. Emphasizing the heterogeneity inherent in these materials, the review briefly introduces single-scale analyses, including the ab initio method, molecular dynamics, and micromechanics, through a scale-bridging technique. Herein, the limitations of these models are also overviewed by that of effectively scale-bridging methods of length or time scales. The hierarchical multiscale model demonstrates these physicochemical properties considering chemical reactions, material defects from nano to macro scale, microscopic properties, and their influence on macroscopic events. Thereby, hierarchical multiscale modeling can facilitate the efficient design and development of next-generation construction.

Simulation System for Earthmoving Operation with Traffic Flow

  • Kyoungmin Kim;Kyong Ju Kim;Hyeon Jeong Cho;Sang Kyu Lee
    • 국제학술발표논문집
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    • The 3th International Conference on Construction Engineering and Project Management
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    • pp.1359-1363
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    • 2009
  • The object of this research is to develop a simulation system for earthmoving operations in consideration of the impact of congestion in-between equipment and existing traffic flow around the site. The congestion in-between equipment and traffic flow affect work productivity. The conventional discrete event simulation, however, has limitations in simulating the flow of construction equipment. To consider the impact of congestion in-between equipment and existing traffic flow, in this paper, a multi-agent based simulation model that can realize characteristics of truck behavior more accurately to consider the impact of congestion was proposed. In this simulation model, multiple agents can identify environmental changes and adapt themselves to the new environment. This modeling approach is a better choice for this problem since it describes behavioral characteristics of each agent by sensing changes in dynamic surroundings. This study suggests a detailed system design of the multi-agent based simulation system.

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도시형 FRT Exterior Design 연구 (A study of urban FRT's Exterior Design)

  • 김성남;김상중;김창현
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2004년도 추계학술대회 논문집
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    • pp.1757-1764
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    • 2004
  • It is the urgent task of induce the inhabitants to utilize the public transportation instead of the personal transportation to dissolve the traffic jam. But construction of the subway, the representative substitute means, demands a great of investment expense including various kinds of expenses. So the technical development and research of standardization of FRT(Fuel cell Rubber tired Train), the eco-friendly public transportation system low in construction expenses, effective, excellent in approach as well as in traffic, are propelled positively. This project wants to propose exterior design FRT in which original creative methods are utilized with the target of development and construction of FRT which coincide with anthropocentric eco-friendly traffic system. Utilizing the proposed style as the basic materials, this project wants to grasp difficulties, and to establish the way to solve and develop them.

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Detecting Red-Flag Bidding Patterns in Low-Bid Procurement for Highway Projects with Pattern Mining

  • Le, Chau;Nguyen, Trang;Le, Tuyen
    • 국제학술발표논문집
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    • The 9th International Conference on Construction Engineering and Project Management
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    • pp.11-17
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    • 2022
  • Design-bid-build (DBB) is the most common project delivery method among highway projects. State Highway Agencies (SHAs) usually apply a low-bid approach to select contractors for their DBB projects. In this approach, the Federal Highway Agency suggests SHAs heighten contractors' competition to lower bid prices. However, these attempts may become ineffective due to collusive bidding arrangements among certain contractors. One common strategy is the rotation of winning bidders of a group of contractors who bid on many of the same projects. These arrangements may also be specific to a particular region or vary in time. Despite the practices' adverse effects on bidding outcomes, an effective model to detect red-flag bidding patterns is lacking. This study fills the gap by proposing a novel framework that utilizes pattern mining techniques and statistical tests for unusual pattern detection. A case study with historical data from an SHA is conducted to illustrate the proposed framework.

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소우 후지모토 건축과 베르나르 추미의 건축에 나타난 사이공간(In-between space) 개념에 대한 비교연구 (A Study on the meaning of in-between space in Sou Fujimoto and Bernard Tschumi's Architecture)

  • 박호현
    • 한국실내디자인학회논문집
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    • 제24권6호
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    • pp.87-95
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    • 2015
  • Aldo Van Eyck and Herman Hertzberger explained 'In-between space' as an intermediate space between opposite elements such as whole and parts, inside and outside, open and close, central and decentral. From this idea, the meaning of 'in-between space' has developed and applied to works of Bernard Tschumi and Sou Fujimoto. In this study, the meaning of 'in-between space' was compared and analyzed based on two architects' works to reveal the design approach in terms of 'in-between space' Final Wooden House, N House, and Serpentine Gallery Pavilion among Sou Fujimoto's work were selected and Le Fresnoy, Lerner Student Center, and Acropolis Museum among Bernard Tschumi's work were selected to analyze. To understand their design approach, their works were compared and analyzed in architectural attitude, tools, construction style and the approach, concept, theme, relation, direction of in-between space. As a result, Sou Fujimoto uses 'in-between space' as a nebulous approach as intermediate space between opposite elements. For Bernard Tschumi, 'in-between space' is also an intermediate space to emphasize and make a tension between opposite elements. It is a method of solving the contradiction condition between old city environment and new architecture.

현대 실내공간에 나타난 공간적 가구의 특성에 관한 연구 - 구조체적 접근 및 역할이 배제된 것을 중심으로 - (A Study on the Characteristics of Spatial Furniture Appearing in Contemporary Indoor Space - Focusing on the exclusion of a structural approach and role -)

  • 김현범;김문덕
    • 한국실내디자인학회:학술대회논문집
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    • 한국실내디자인학회 2008년도 춘계학술발표대회 논문집
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    • pp.226-231
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    • 2008
  • Indoor space becomes limited by each factor engirdling and defining infinite empty space. Those factors appear as physical ones called wall, floor, and ceiling, and earn existential value as a living space by placing furniture in the space organized in this way. However, it is not easy to find a clear harmony between the space and furniture. Since long ago, a great deal of effort has been put into creating a relational harmony between the space and furniture. This study is to be unfolded by assuming that spatial furniture comes amid these efforts. Namely, furniture does not exist as a separate entity in a space but interacts with the construction; thus, furniture is immersed into construction or construction becomes furniture, which demonstrates that furniture is on the continuum of the composition of the space. This study looks into the characteristics of spatial furniture in contemporary indoor space through relevant cases, and prepares the ground for a creative interpretation of Indoor space.

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가구디자인 형태창출에 있어서 비정형에 관한 연구 (A Study on A-formal in Furniture Design Form Creation)

  • 김영호
    • 한국가구학회지
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    • 제26권4호
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    • pp.301-313
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    • 2015
  • This study purposes on continuing experimental research of furniture form creation focused on the importance and necessity for a-formal concept for designers to drift away from general acknowledgement and practice routine to design more radical forms for meeting various needs of late industrialized society, which have not been satisfied with formal and universal designs. This study covers presenting new points of view on research for designers to look for different solutions to widen their consideration in the process of furniture form development and to set up academic data base with the case studies of designers in anti-construction concept to define their experimental challenges for new design form creation, on the basis of overall research on the effects and roles of a-formal approach in the furniture design form creation.

유전자 알고리즘을 이용한 직선 방음벽의 최적 설계 (Optimal Design of Straight Noise Barriers Using Genetic Algorithm)

  • 하지형;최태묵;조대승
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2001년도 추계학술대회논문집 I
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    • pp.127-132
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    • 2001
  • A successful design approach for noise barriers should be multidisciplinary because noise reduction goals influence both acoustical and non-acoustical considerations, such as maintenance, safety, physical construction, cost, and visual impact. These various barrier design options are closely related with barrier dimensions. In this study, we have proposed an optimal design method of straight noise barriers using genetic algorithm, providing a barrier having the smallest dimension and achieving the specified noise reduction at a receiver region exposed to the industry and traffic noise, to help a successful barrier design.

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지진하중에 의한 구조물의 비선형 거동 예측 (Prediction of Nonlinear Seismic Response)

  • 김희중
    • 한국강구조학회 논문집
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    • 제8권4호통권29호
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    • pp.77-84
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    • 1996
  • The structural members under seismic loading actually show inelastic behavior, so the inelastic responses should be calculated for the seismic design of structures or estimating the structural damage level. Although direct time history analysis may calculate the exact dynamic nonlinear responses for given ground motions, this approach involves a high computational cost and long period. Therefore, it should be developed the approach to estimate nonlinear responses for the practical purpose. The artificial earthquake accelerograms were generated to obtain the smoothed responses spectra, and the samples of generated accelerogram for each seismic event was used to examine average nonlinear response spectra. The stabilized response spectra for each earthquake event was used to evaluate the effects of various yield strength ratios, damping values and nonlinear hysteretic models. The approach, which can simply predict the nonlinear seismic responses of structures, was shown in this study.

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철근량 저감을 통한 코핑부 시공성 향상 (Improvement of Constructability of Coping by Reduction of Reinforcement Amount)

  • 박봉식;박성현;조재열
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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    • pp.1577-1582
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    • 2011
  • Recently rapid construction of bridge is a main interest in construction. A research on rapid construction of pier coping is urgently needed because pier, which is a bridge understructure, directly affect lane reduction and increase of social cost. Precast assembly method and pre-assembly method are the main subjects of rapid construction. But these researches have focused not on reduction of reinforcement amount, but on modifying production method of coping. Reinforcement amount of design specification is as much as that of coping under constructing. So different approach is needed for reduction of reinforcement amount. In this paper, design of pier coping using strut-tie model was proposed for reduction of reinforcement amount and improvement of constructability. Railway bridge pier coping under constructing was analyzed using a finite element method and designed using strut-tie model.

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