S-N curve for screw fastenings of trapezoidal steel sheeting

The paper deals with the design of fastenings of trapezoidal sheeting to the supporting structure under repeated uplift loads. These loads caused by wind or passing traffic (especially trains) can lead to a premature pull-through failure at points of fastening. Trapezoidal sheeting as part of the building envelope is subject to repeated wind loads. The wind suction peaks that occasionally occur in (Central) Europe are covered on the resistance side by a generalized reduction factor cycl. The background of this factor is explained briefly. However, it only covers a number of wind suction peaks in the four-digit range. Both older studies from Sweden and recent studies from Australia extend the knowledge to the fivedigit range of wind suction peaks. This range is sufficient for wind suction loads from tropical storms, which were the trigger for the investigations, but not for the passing trains mentioned at the beginning, which are associated with a number of repeated loads in the six- to seven-digit range. For the design of the fastenings for this range the number of repeated loads, tests were required, the performance and evaluation of which are presented here. The result is an S-N curve for the design of the fastenings of trapezoidal sheeting.