Optimal Grid Geometry of Diagrid Structures for Tall Buildings

Moon, Kyoung Sun

doi:10.3763/asre.2008.5129

Cited by 63 publications

(36 citation statements)

References 2 publications

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“…Thus, in a properly designed diagrid structure, the design of the upper portion of the building is governed by shear, and the lower portion is governed by bending. Considering this fact, it can be presumed that diagrid structures with gradually stiffer angles towards the base will have potential for structural effi ciency (Moon, 2008). For completeness of the study, the case in which gradually changing angles of diagrids become steeper toward the top is studied as well.…”

Section: Ad For Bendingmentioning

confidence: 99%

Sustainable structural engineering strategies for tall buildings

Moon

2008

Structural Design Tall Build

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SUMMARYSustainable structural engineering strategies for tall buildings are presented with an emphasis on stiffness-based material-saving design methodologies. The design methodologies are applied to the systems with diagonals such as braced tubes and more recently developed diagrid structures. Guidelines for determination of bending and shear deformations for optimal design, which uses the least amount of structural material to meet the stiffness requirements, are presented. The impact of different geometric confi gurations of the structural members on the material-saving economic design is also discussed, and recommendations for optimal geometries are made. The design strategies discussed here will contribute to constructing built environments using the minimum amount of resources.

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Section: Ad For Bendingmentioning

confidence: 99%

Sustainable structural engineering strategies for tall buildings

Moon

2008

Structural Design Tall Build

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“…Diagrids are categorized into two different types of uniform and varying-angle diagrids. A uniform-angle diagrid structure designed with an optimal angle is efficient for tall buildings up to about 110 stories with their height-to-width aspect ratio of about 7, while varying angle diagrids with diagonals placed at gradually steeper angles toward the base could be more efficient than uniform angle diagrids for even taller buildings with their aspect ratios greater than about 7 and suitable for tall buildings up to about 130 stories [24].…”

Section: Narrative Of Exterior Structuresmentioning

confidence: 99%

Advances in Structural Systems for Tall Buildings: Emerging Developments for Contemporary Urban Giants

Ali

Moon

2018

Buildings

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New developments of tall buildings of ever-growing heights have been continuously taking place worldwide. Consequently, many innovations in structural systems have emerged. This paper presents a retrospective survey of the main structural systems for tall buildings with emphasis on the advancements of recent, emerging, and potentially emerging systems. A structural systems chart that was previously developed by the authors has been updated in this paper to recognize, categorize and add the more recent structural systems. Recent trends of tubular structural systems in modified forms including the braced megatubes and diagrids are presented. Core-outrigger structural systems are discussed with emphasis on their adaptability. The potential of employing superframes for stand-alone and conjoined megatall buildings is predicted. As a means to solve today's various project-specific complex design requirements, different mixed structural systems for supertall and megatall buildings are presented. This paper also discusses the widespread application of composite structural systems and recent trends of concrete cores for contemporary tall buildings. Finally, the future of tall buildings is predicted as the race for height continues.

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“…Model 3 which had its diagrid to start at Level 1 had positive shear lag at the first storey (z/H = 0.00), while suffering from the highest stresses at the four sides of the perimeter column, which are 39986 kN and 54240 kN (for Malaysia and Hong Kong wind load case respectively at the building leeward face. Furthermore, the axial stress distributions at the ground floor of Model 4,5,6,7,8 and 9 which are depicted in the graphs in Fig. 5 and Fig.…”

Section: Shear Lag Effectmentioning

confidence: 99%

“…The aesthetically unique design of skyscraper that diagrid provides is mainly due to its free of exterior columns [6]. Since diagrid system allows the elimination of almost all the vertical columns, this system is able to provide variety of open floor plans.…”

Section: Introductionmentioning

confidence: 99%

Lateral Displacement and Shear Lag Effect of Combination of Diagrid-Frame

et al. 2018

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Abstract.Diagrid system, which is the portmanteau of diagonal grid member, is an exterior lateral load resisting system for tall building that has gained a wide acceptance in the design of tall buildings. There is abundance of researches that studied the efficiency of diagrid systems, which are constructed from the ground level to the top of the buildings in resisting the lateral load. Nevertheless, no study had been performed on the effectiveness of the diagrid that is constructed above other tall building systems despite the existence of a few buildings in the world that employ such system. The objective of this research is to understand the behavior of the lateral displacement and shear lag effect due to wind load when the diagrid structure is constructed above a frame. Models of 60-story buildings with a footprint of 36m x 36m were analyzed by using Staad.Pro software. The level where the diagrid members started was altered. The lateral displacement was reduced to 60.6 percent and 41 percent of the lateral displacement of a building with full frame system when the combination of frame-diagrid that had the diagrid started at Level 1 and Level 45, respectively were employed. Furthermore, the shear lag ratio was reduced from 1.7 to 1.3 when the level where the diagrid started was increased from Level 1 to Level 45.

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Optimal Grid Geometry of Diagrid Structures for Tall Buildings

Cited by 63 publications

References 2 publications

Sustainable structural engineering strategies for tall buildings

Sustainable structural engineering strategies for tall buildings

Advances in Structural Systems for Tall Buildings: Emerging Developments for Contemporary Urban Giants

Lateral Displacement and Shear Lag Effect of Combination of Diagrid-Frame

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