Revision of EN 1993‐1‐11 – fatigue design rules for tension components

Abstract

As part of the ongoing revision of EN 1993‐1‐11 ”Design of structures with tension components“, the current fatigue design rules have been subjected to a critical review. This has resulted in modifications and amendments, including the adjustment of several parameters. This paper provides an introduction to as well as background information on those changes.

Ermüdungsfestigkeit von Zugstäben mit Endgewinden

“…Zurzeit befinden sich DIN EN 1993‐1‐9 [4] und DIN EN 1993‐1‐11 [5] in der Überarbeitung durch die europäischen Normungsgremien. Es ist geplant, das Kerbdetail „Zugstange mit Endgewinde“ über einen Verweis von Eurocode 3 Teil 1‐11 auf Teil 1‐9 zu erfassen [6].…”

Fatigue resistance of steel ropes: failure criterion: Background to the verification in prEN 1993‐1‐11:2020

“…In the past, tests have been carried out on rope systems and on the individual wires used to construct ropes. The fatigue resistance of individual wires appears to be significantly higher than that of rope systems [4]. The main reason for this is that fatigue failure of wires in a rope is related to fretting corrosion at the contact location of crossing wires ('trellis points') [11], [12].…”

“…During the revision process of the standard [2], concerns were raised regarding the correctness of the S-N curve, and an alternative curve was suggested, see [3], [4]. Fig.…”

S‐N curve for full‐locked coil ropes: Background to the verification in prEN 1993‐1‐11:2020

“…However, metal sockets were used for the former, whereas resin sockets were used for the latter, and ropes in resin sockets have a greater endurance. Data on spiral strand ropes in [6] and full-locked coil ropes in [7] are compared in [8], revealing a better fatigue resistance for the former, but the tests employed different termination criterion. A poorer fatigue resistance for full-locked coil ropes is also suggested in [9], but that study was based on a very limited amount of data for full-locked coil ropes.…”

“…Fig. 12 shows the S-N curve finally selected for the updated standard [2], together with the S-N curve in the original standard [1] and a previous alternative according to [8].…”