A new field of application for dowel strips are orthotropic composite roadway slabs. In contrast to conventional composite steel bridge construction, the dowel strips create a two‐dimensional bond. As a result, they are not only exposed to longitudinal but also to transverse shear forces. Up to now, neither the load‐bearing capacity nor the load‐deformation behavior under transverse shear forces have been investigated. Furthermore, there are design related deviations from the current approval in form of a lower dowel distance. This paper presents two different types of push‐out tests, which provide new insights into small composite dowel strips under longitudinal and transverse loads. Based on these tests and numerical investigations, the effects of smaller dowel strips are analyzed and special features of the load transfer mechanism under transverse shear forces are highlighted. The investigations presented here were carried out as part of the AiF‐FOSTA research project P 1265 [1].
<p>Increases in traffic loads led to extensive fatigue damages to existing orthotropic steel roadway slabs. Reinforced concrete slabs are less susceptible to fatigue but considerably heavier. With the so-called ortho-composite-slab a light and robust construction is developed as an alternative to ex- isting construction methods for bridge decks. The experimental test program planned within the framework of the AiF-FOSTA research project P 1265 [1] is used to determine the load-bearing and fatigue behavior of ortho-composite-slabs with composite dowel strips. The following article pre- sents the construction and the experimental test program.</p>
Large increases in traffic loads led to extensive fatigue damage to existing orthotropic steel roadway slabs of bridges. Reinforced concrete bridges and conventional composite bridges are less susceptible to fatigue but considerably heavier. With the so‐called ortho‐composite‐slab (OC‐slab) a lightweight and robust construction is currently being developed as an alternative to existing construction methods. The basic ideas for the design are explained and an overview of the objectives of the AiF‐FOSTA research project P1265 [1] is given. An overview of the experimental test program is given in section 3.3 It is used to determine the load‐bearing and fatigue behavior of the OC‐slab with composite dowel strips. Detailed information on tests on dowel strips in longitudinal and transverse direction are presented in [9]. Furthermore, application examples in practice are shown in section 4.
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