Showing papers by "Elena Mele published in 2014"
TL;DR: In this paper, a first step toward a systematic and comprehensive study of geometrical patterns for diagrids is provided for a 90-story model building, according to procedures either provided in the literature or suggested by the authors.
66 citations
TL;DR: In this article, an overview on application of tubular structures to high-rise buildings is carried out; in particular, in the first part of the paper, the peculiarities of diagrid systems are described: starting from the analysis of the internal forces arising in the single diagris module due to vertical and horizontal loads, the resisting mechanism of diaggrid buildings under gravity and wind loads is described, and recent researches and studies dealing with the effect of geometry on the structural behavior are discussed.
Abstract: SUMMARY
The originality of form is one of the new trends that can be identified in the current design of tall buildings. In this design trend, the so-called diagrid structures, which represent the latest mutation of tubular structures, play a major role due to their inherent esthetic quality, structural efficiency and geometrical versatility. In this paper, an overview on application of such typology to high-rise buildings is carried out; in particular, in the first part of the paper, the peculiarities of diagrid systems are described: starting from the analysis of the internal forces arising in the single diagrid module due to vertical and horizontal loads, the resisting mechanism of diagrid buildings under gravity and wind loads is described, and recent researches and studies dealing with the effect of geometry on the structural behavior are discussed. In the second part of the paper, a comparative analysis of the structural performance of some recent diagrid tall buildings, characterized by different number of stories and different geometries, namely the Swiss Re building in London, the Hearst Headquarters in New York and the West Tower in Guangzhou, is carried out, and some general design remarks are derived. Copyright © 2012 John Wiley & Sons, Ltd.
61 citations
TL;DR: In this article, stiffness and strength design criteria for diagrid structures are examined and translated in simplified formulae for quick member sizing, and the application of the two approaches for the design of a 100-storey building model, carried out for different diagonality geometrical patterns, gives the opportunity of discussing the relative influence on the design outcomes, in terms of resulting diagonal cross sections and steel weight, as well as on the structural performance.
Abstract: SUMMARY
The procedures and formulations suggested in literature for the design of diagrid structures start from the assumption that diagonal sizing process is governed by the stiffness requirements, as usually occurs for other, less efficient, structural types, and that member strength demand is automatically satisfied by the cross section resulting from the stiffness requirements. However, thanks to the high rigidity of the diagonalized facade, strength requirements can be of paramount importance and even be the governing design criterion. In this paper, stiffness and strength design criteria for diagrid structures are examined and translated in simplified formulae for quick member sizing. The application of the two approaches for the design of a 100-storey building model, carried out for different diagrid geometrical patterns, gives the opportunity of discussing the relative influence of stiffness and strength on the design outcomes, in terms of resulting diagonal cross sections and steel weight, as well as on the structural performance. Copyright © 2013 John Wiley & Sons, Ltd.
55 citations
TL;DR: In this article, the authors define a framework for assessing the local structural issues in the design of diagrid tall buildings, and present a methodology for establishing the need for a specific secondary bracing system (SBS) as a function of the diaggrid geometry.
35 citations