Wheel prints and axle geometries for static and fatigue load models of expansion joints for road bridges

Abstract

<p>For the design and verification of expansion joints and details of bridge decks not only the axle and wheel loads, but also the wheel print and axle geometries are crucial. The exact contact stress distribution is normally of lesser importance. Modified axle geometries and wheel prints are proposed for the tandem systems of the static load models and the axle types of the fatigue load models FLM1, FLM2 and FLM4 of EN 1991-2. Examples of the required static strength and fatigue resistance of expansion joints with existing regulations, with EN 1991-2 and with the modified axle geometries are shown. Conclusions are drawn about the consequences of the current regulations and the proposal of the modified wheel print and axle geometries.</p>