Lateral stiffness and preliminary design methodology of twisted diagrid tube structures

Abstract

Twisted forms have been widely employed in high-rise buildings in recent years. The diagrid structural system is particularly suitable for twisted buildings because of its large lateral stiffness and unique architectural esthetics, but little research on twisted diagrid tube structures is currently available. This paper studies the influence of diagonal angle, twist rate, aspect ratio, corner column, and plan form on the lateral stiffness of twisted diagrids, and the optimal diagonal angle range is determined. Considering the stiffness and strength criteria, the design methodology of diagonal sizes of twisted diagrids is proposed, and the methodology is validated by finite element analysis. In addition, this paper presents a novel configuration of twisted diagrid, that is, the twisted diagrid with asymmetric diagonal angles. The influence of the left-and right-inclined diagonal angle on the lateral stiffness of twisted diagrids is investigated. It is found that twisted diagrid structure with asymmetric diagonal angles exhibits larger lateral stiffness than the symmetric case. The results in this paper are useful for engineers to determine the configuration and diagonal sizes of the twisted diagrid tube structures.

Sustainable Seismic Performance of Diagrid Core-Tube Structure with Replaceable Steel Coupling Beam

“…At present, the research on diagrid tubes mainly focuses on the theoretical calculation of the lateral stiffness [4,5], plastic development research, diagrid angle and plane form optimization, diagrid node research, and so on [6][7][8]. Moon [9] investigated the optimal configurations of today's prevalent structural systems for tall buildings to generate higher lateral stiffness and maximize their structural efficiency.…”

Investigating the effect of form curvature on diagrid tall buildings considering wind loads

“…Despite this, the diagrid is extremely popular among designers these days, and many famous buildings have demonstrated its structural and architectural benefits. Comprehensive analyses have been done about the diagrid system, such as finding the optimal angle of diagonals, [21][22][23][24] preliminary design, 21,25 and connections 26,27 which can be seen in the review by Asadi and Adeli. 20 Nevertheless, few studies 28 have been conducted to investigate the great potential of diagrid for curved forms.…”

آنالیز تاب‌آوری لرزه‌یی سازه‌های شبکه ی قطری بلندمرتبه با پیکربندی پیرامونی مختلف بر اساس معیار شاخص نیرومندی

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