DOI: 10.5176/2301-394X_ACE15.40
Authors: Kyoung Sun Moon
Abstract:
This paper investigates comparative structural efficiency of braced tubes and more recently developed diagrids employed for tall buildings of various forms. Structural design of tall buildings is generally governed by lateral stiffness. Tall buildings of various heights are optimally designed with braced tubes and diagrids to meet the lateral stiffness requirements. The comparative structural efficiency of the two systems employed for conventional rectangular box form tall buildings is studied first, depending on building heights and height-to-width aspect ratios. The study is further expanded to investigate the structural efficiency of the two systems employed for recently emerging complex-shaped tall buildings, such as twisted, tilted and tapered tall buildings. Parametric structural models are generated to investigate the impacts of various important geometric configurations of complex-shaped tall buildings, such as the rate of twist, angle of tilt and angle of taper. The parametric models are exported to structural engineering software for analyses and design. Based on the study results, comparative structural efficiency of the braced tube and diagrid structures of each complex form category is presented.
Keywords: tall buildings; braced tubes; diagrids; comparative structural efficiency; twisted towers, tilted towers, tapered towers
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