Influence of loading sequence on wind induced fatigue assessment of bolts in TV-tower connection block

  • Bolted connections are widely employed in structures like transmission poles, wind turbines, and television (TV) towers. The behaviour of bolted connections is often complex and plays a significant role in the overall dynamic characteristics of the structure. The goal of this work is to conduct a fatigue lifecycle assessment of such a bolted connection block of a 193 m tall TV tower, for which 205Bolted connections are widely employed in structures like transmission poles, wind turbines, and television (TV) towers. The behaviour of bolted connections is often complex and plays a significant role in the overall dynamic characteristics of the structure. The goal of this work is to conduct a fatigue lifecycle assessment of such a bolted connection block of a 193 m tall TV tower, for which 205 days of real measurement data have been obtained from the installed monitoring devices. Based on the recorded data, the best-fit stochastic wind distribution for 50 years, the decisive wind action, and the locations to carry out the fatigue analysis have been decided. A 3D beam model of the entire tower is developed to extract the nodal forces corresponding to the connection block location under various mean wind speeds, which is later coupled with a detailed complex finite element model of the connection block, with over three million degrees of freedom, for acquiring stress histories on some pre-selected bolts. The random stress histories are analysed using the rainflow counting algorithm (RCA) and the damage is estimated using Palmgren-Miner's damage accumulation law. A modification is proposed to integrate the loading sequence effect into the RCA, which otherwise is ignored, and the differences between the two RCAs are investigated in terms of the accumulated damage.show moreshow less

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Document Type:Article
Author:Dr.-Ing. Sharmistha ChowdhuryORCiDGND, Dr.-Ing. habil. Volkmar ZabelGND
DOI (Cite-Link):https://doi.org/10.1016/j.rineng.2022.100603Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20221028-47303Cite-Link
URL:https://www.sciencedirect.com/science/article/pii/S2590123022002730?via%3Dihub
Parent Title (English):Results in Engineering
Publisher:Elsevier
Place of publication:Amsterdam
Language:English
Date of Publication (online):2022/08/28
Date of first Publication:2022/08/28
Release Date:2022/10/28
Publishing Institution:Bauhaus-Universität Weimar
Institutes and partner institutions:Fakultät Bauingenieurwesen / Institut für Strukturmechanik
Volume:2022
Issue:Volume 16, article 100603
Pagenumber:18
First Page:1
Last Page:18
Tag:Damage accumulation; Fatigue life; Loading sequence; Rainflow counting algorithm; Wind load
GND Keyword:Schadensakkumulation; Lebenszyklus; Windlast
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften
BKL-Classification:56 Bauwesen
Open Access Publikationsfonds:Open-Access-Publikationsfonds 2022
Licence (German):License Logo Creative Commons 4.0 - Namensnennung-Nicht kommerziell-Keine Bearbeitung (CC BY-NC-ND 4.0)