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

  • Giulia Milana
  • Pierluigi Olmati
  • Konstantinos Gkoumas Sapienza University of Rome
  • Franco Bontempi

Abstract

One of the evocative structural design solutions for tall buildings is recently embraced by the diagrid (diagonal grid) structural system. Diagrid, with a perimeter structural configuration characterized by a narrow grid of diagonal members involved both in gravity and in lateral load resistance, requires less structural steel than a conventional steel frame, provides for a more sustainable structure and has emerged as a new design trend for tall-shaped complex structures due to aesthetics and structural performance. The purpose of this study is twofold. First, to assess the optimal structural design of a diagrid tall-building, also compared to a typical outrigger building, focusing on the sustainability (the use of structural steel) and the structural safety and serviceability. To this aim, dierent diagrid geometries are tested and compared. Second, to provide some insight on the residual strength of diagrid structures, also in the damaged state (modelled by the elimination of diagonal grids). Both goals are accomplished using FEM nonlinear analyses.

Keywords

diagrid, steel-framed, structural design, capacity curves, pushover analysis, structural robustness, sustainability
Published in Onlinefirst
01-06-2015
How to Cite
MILANA, Giulia et al. Ultimate Capacity of Diagrid Systems for Tall Buildings in Nominal Configuration and Damaged State. Periodica Polytechnica Civil Engineering, [S.l.], v. 59, n. 3, p. 381-391, 2015. ISSN 1587-3773. Available at: <https://pp.bme.hu/ci/article/view/7795>. Date accessed: 11 dec. 2017. doi: https://doi.org/10.3311/PPci.7795.
Section
Research Article