Wind-induced fatigue analysis of high-rise guyed lattice steel towers

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Ribeiro, D (Author) Other; Braganca, C (Author) Other; Pedro Aires Montenegro (Author) FEUP; Carvalho, H (Author) Other; Costa, B (Author) Other; Marques, F (Author) Other

Journal

Title: Structures

Vol. 36

Pages: 719-734

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00W-09R

DOI: 10.1016/j.istruc.2021.12.017

Abstract (EN): Wind-induced fatigue is a major issue for the design of slender high-rise structures. However, there are still few studies focused on this topic, resulting in a lack of practical design procedures for this type of structures. This paper aims to fill this gap by presenting a complete and practical methodology for the wind-induced fatigue life assessment of high-rise towers and its application to a 120 m cable-stayed steel tower composed by a modular lattice. The wind actions were considered as the sum of the quasi-static component according to international codes and a numerically generated, trough an ergodic stochastic process, turbulent component which is based on the Kaimal wind spectrum. Real wind measurements were also taken for a period of 15 months on a nearby MET station which, when compared with the normative scenario, proved to be much less conservative and were not used for the safety analysis. The wind velocities were used as inputs for a nonlinear dynamic analysis from which stress time histories were derived for 10 potentially critical structural details. The damage in each detail was computed through the application of the Rainflow counting algorithm and Palmgren-Miner's damage accumulation law, indicating the connection region between the modules as the critical detail with respect to fatigue damage.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16