Experimental investigation on the fatigue design of anchor channels

Abstract

Cast‐in anchor channels subjected to repeated cyclic actions need to be verified against fatigue failure. However, the fatigue behavior of these fasteners has rarely been investigated up to now. Consequently, the fatigue verification is not covered by the provisions of EN 1992‐4 and specific design rules apply for this product. This article gives a brief overview of the current design methods for anchor channels under fatigue loading and addresses its limitations. Results of experimental investigations within a recent research project are presented that focused on the fatigue resistance of fastenings under combined static and fatigue loading. Accompanying strain measurements provide insights about the distribution of cyclic tension loads through the channel profile to the anchors. In addition, tests under pulsating and alternating shear perpendicular to the channel axis were performed to outline the suitability under fatigue relevant shear loads. The test results obtained are discussed with respect to the existing state of knowledge. Finally, recommendations for the fatigue design of anchor channels are given.