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Shock and Vibration
Volume 2017, Article ID 2031248, 19 pages
https://doi.org/10.1155/2017/2031248
Research Article

Structural Improvements for Tall Buildings under Wind Loads: Comparative Study

1Politecnico di Milano, Milan, Italy
2University of Trento, Trento, Italy
3Louisiana State University, Baton Rouge, LA, USA

Correspondence should be addressed to Aly Mousaad Aly; ude.usl@yla

Received 27 April 2017; Revised 13 September 2017; Accepted 26 September 2017; Published 6 November 2017

Academic Editor: Evgeny Petrov

Copyright © 2017 Nicola Longarini et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The behavior of a very slender building is investigated under wind loads, to satisfy both strength and serviceability (comfort) design criteria. To evaluate the wind effects, wind tunnel testing and structural analysis were conducted, by two different procedures: (i) Pressure Integration Method (PIM), with finite element modeling, and (ii) High Frequency Force Balance (HFFB) technique. The results from both approaches are compared with those obtained from Eurocode 1 and the Italian design codes, emphasizing the need to further deepen the understanding of problems related to wind actions on such type of structure with high geometrical slenderness. In order to reduce wind induced effects, structural and damping solutions are proposed and discussed in a comparative study. These solutions include () height reduction, () steel belts, () tuned mass damper, () viscous dampers, and () orientation change. Each solution is studied in detail, along with its advantages and limitations, and the reductions in the design loads and structural displacements and acceleration are quantified. The study shows the potential of damping enhancement in the building to mitigate vibrations and reduce design loads and hence provide an optimal balance among resilience, serviceability, and sustainability requirements.