PSI - Issue 22

Available online at www.sciencedirect.com

ScienceDirect

Available online at www.sciencedirect.com

Structural Integrity Procedia 00 (2018) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 22 (2019) 401–406

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers Abstract Racking systems, applied in logistics warehouses, are often built using zinc-coated thin steel plates that are joining by bolted connections. In fully automatic systems, these structures are loaded 7/7 days and 24/24 hours raising fatigue issues due to the cyclic nature of the resulting stresses. FASTCOLD project intends to provide fatigue design rules because until nowadays there is no reference about fatigue rules of bolted connections between thin-walled cold-formed steels, under diverse preloaded bolts, including snug tight condition. This work revealed differences between S-N curves suggested by Eurocode 3 and fatigue data obtained experimentally. In addition, preloaded bolts presented better fatigue resistance than snug tight bolts; the use of multiple bolted joints also improves the fatigue resistance due to the joint effect of bolts. Failed specimens showed that if the bolts preload and applied load level are respectively high and low enough, the specimen failures occurs along the gross cross-section, near the hole vicinity, instead of the typical net cross-section failure as occurred in single and multiple connections with snug tight bolts. © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. p IRAS 2019 – First International Symposium on Risk Analysis and Safety of Complex Structures and Components Fatigue Behaviour of Bolted Connections Applied in Racking Structures. Experimental Perspective V.M.G. Gomes a *, A.M.P. De Jesus ab , M. Figueiredo a , José A.F.O. Correia ab , L. Abatta c , G. Lesiuk d , António A. Fernandes ab a Faculty of Engineering of the University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal b INEGI, University of Porto, Rua Dr.Roberto Frias, 4200-465, Porto, Portugal c Universidad de las Fuerzas Armadas ESPE, Ecuador d Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Wrocław

Keywords: Racking Structure, Bolted Connections, Fatigue Behaviour, S-N curves, Fatigue Failure Modes

* Corresponding author. Tel.: +351 22 508 1740; fax:+351 22 508 1440. E-mail address: vtgomes@fe.up.pt

2452-3216 © 2018 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the First International Symposium on Risk and Safety of Complex Structures and Components organizers 10.1016/j.prostr.2020.01.050