Geometrical patterns for diagrid buildings: Exploring alternative design strategies from the structural point of view

Montuori, Giovanni Maria; Mele, Elena; Brandonisio, Giuseppe; Luca, A. De

doi:10.1016/j.engstruct.2014.04.017

Cited by 60 publications

(24 citation statements)

References 8 publications

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“…Recent research focuses on the optimal layout of diagrid structures, which is very complex and carried out with optimization methods [15]- [16] and the alternative geometrical configurations, obtained by changing the angle of diagonals as well as by changing the number of diagonal along the building height [17]. The same authors [18] propose secondary bracing systems for diagrid structures, capable of improving stability and local flexibility, at the cost of a small increase in structural weight.…”

Section: Diagrid Structuresmentioning

confidence: 99%

Ultimate Capacity of Diagrid Systems for Tall Buildings in Nominal Configuration and Damaged State

Milana¹,

Olmati²,

Gkoumas

et al. 2015

Period. Polytech. Civil Eng.

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One of the evocative structural design solutions for tall buildings is recently embraced by the diagrid (diagonal grid) IntroductionIt is a common understanding that society requires enhanced structures for the people's needs. Besides safety and functional requirements collectively defined in the so-called Performancebased Design [1], today the attention focuses on the sustainability in the broader and profound sense of the word [2].Sustainability in the urban and built environment is a key issue for the wellbeing of people and society. Sustainable development, defined as the "development that meets the needs of the present without compromising the ability of the future generations to meet their own needs" [3] is nowadays a first concern for public authorities and the private sector. Sustainable design leads to innovation since it demands inventive solutions, and eventually is supported by a cultural shift, evident from national level reviews and surveys [4,5]. Sustainability issues are wide-ranging in the building industry but the main focus is the reduction of energy consumption in construction and use.In construction, steel has developed as a material of choice and offers a wide range of solutions that can make buildings more energy efficient, less costly to operate and more comfortable. Several green solutions, aiming at the minimization of structural steel, have been developed in the last few years. Among those, the diagrid structural system is considered as a promising solution for high-rise steel buildings. Diagrid is a perimeter structural configuration characterized by a narrow grid of diagonal members that are involved both in gravity and in lateral load resistance that has emerged as a new design trend recently for tall-shaped complex structures due to aesthetics and structural performance [6,7].Since diagrid requires less structural steel than a conventional steel frame, it provides for a more sustainable structure.This study focuses on the overall structural performance, the ultimate capacity and the robustness of diagrid tall buildings, using numerical (FE) methods. More precisely, the paper is organized in the following manner. Section 2 provides details on diagrid for high-rise buildings. Section 3 outlines structural robustness approaches for steel buildings. Section 4 introduces the case study steel high-rise building and the performed Finite Element (FE) numerical analyses. Finally, Section 5 provides some

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Section: Diagrid Structuresmentioning

confidence: 99%

Ultimate Capacity of Diagrid Systems for Tall Buildings in Nominal Configuration and Damaged State

Milana¹,

Olmati²,

Gkoumas

et al. 2015

Period. Polytech. Civil Eng.

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“…Geometry is the key-word for interpreting the structural efficiency of diagrids, but also the form versatility and the aesthetical features. With specific reference to the structural aspects, the triangle module is the structure base unit of the pattern and both resisting mechanisms and deformation modes depend on module geometrical attributes [6,9,10]. Further, the inherent geometrical flexibility of the diagrid pattern can be perfectly tuned to match the varying structural and/or architectural demands, also creating a wide range of additional optical affects, including latticing, gradation, differentiation, diagonality, etc.…”

Section: Structural Efficiency Of Diagrids and Related Research Issuesmentioning

confidence: 99%

19.04: Diagrid: the renaissance of steel structures for tall buildings geometry, design, behavior

Mele

2017

ce papers

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Structural configurations best addressing the traditional requirements of strength and stiffness for tall buildings are the ones employing the tube concept, whose efficiency, however, is strictly related to the involved shear-resisting mechanism. In this perspective, diagrid structures -the latest mutation of tube structures -show an extraordinary efficiency, related to the adopted geometrical pattern: thanks to the triangle tessellation of the façades, internal axial forces are largely prevalent in the structural members, thus shear lag effects and racking deformations are minimized. Being also adaptable to whatever surface, diagrid is becoming the most used structural solution for tall buildings of complex form. In this paper some specific design issues for diagrid structures are identified, namely: the relative importance of strength and stiffness design criteria, as well as to the need of secondary bracing systems for counteracting the inter-module flexibility effects. Simplified procedure for dealing with such issues are proposed and design implications are discussed.

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“… Regular Diagrid: Assuming a diagrid module with constant angle along the height, the resulting pattern is characterized by constant module size and uniform density [1].  Variable angle Diagrid (VA): The basis behind the design strategy adopting variable angle (VA) patterns is that the share of bending and shear stiffness demands in a diagrid building is a function of the building dimension, and, for a given building, it varies along elevation thus varying angle diagrid system is designed [1].…”

Section: A Diagrid Variationsmentioning

confidence: 99%

“… Variable angle Diagrid (VA): The basis behind the design strategy adopting variable angle (VA) patterns is that the share of bending and shear stiffness demands in a diagrid building is a function of the building dimension, and, for a given building, it varies along elevation thus varying angle diagrid system is designed [1].  Variable density Diagrid (VD): An alternative design strategy is proposed, consisting in a variable density (VD) geometry of the structural configuration: the decrease of stiffness and strength demands along the elevation is addressed by reducing the number of diagonals going from the building base to the top [1].…”

Section: A Diagrid Variationsmentioning

confidence: 99%

A Review on Novel Structural Development in Tall Building: Diagrid Structure

2017

IJAERD

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Geometrical patterns for diagrid buildings: Exploring alternative design strategies from the structural point of view

Cited by 60 publications

References 8 publications

Ultimate Capacity of Diagrid Systems for Tall Buildings in Nominal Configuration and Damaged State

Ultimate Capacity of Diagrid Systems for Tall Buildings in Nominal Configuration and Damaged State

19.04: Diagrid: the renaissance of steel structures for tall buildings geometry, design, behavior

A Review on Novel Structural Development in Tall Building: Diagrid Structure

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