Opis
Steel orthotropic decks are sensitive to stiffener-to-deckplate fatigue. Larger traffic volumes and concentrated wheel loads contribute to this phenomenon. Traditionally, the effect of the wearing courses is taken into account through load dispersal under 45° reducing the stress at the deck plate surface. However for asphalt surfacings this effect is small. A more reliable solution could be present if a structural cooperation were present between the deck and the surfacing. In this paper, the results are presented from a study of various alternatives for a lightweight bridge surfacing contributing to fatigue reduction at the stiffener-to-deckplate intersection. Asphalt, neoprene and composite layers are considered as well as honeycomb sandwich panels. The effect of the solutions is measured by strain gauges on an orthotropic bridge prior to the final surfacing installation. The results are compared with conclusions derived from a finite element model and indicate that depending on the type of layer, a 20 to 30 % reduction of stresses is possible, resulting in a 3 to 5 times longer fatigue life, without increasing the deck weight. Spis treściHans DE BACKER, Amelie OUTTIER, Philippe VAN BOGAERT Alternatives for bridge surfacings with orthotropic plated deck: a fatigue point of view 5 Wojciech GRABOWSKI, Andrzej POZARYCKI Energy absorption in large dimension asphalt pavement samples reinforced with geosynthetics 17 Marek IWAŃSKI, Mariusz POBOCHA Water and frost resistance of gap-graded asphalt modified with the SBS polymer and hydrated lime 29 Mahnaz NIKBAKHT, Romain DIEDERICH The energy absorption potential and its integration in the national European specifications 41 Lysandros PANTELIDIS Determining of the soil strength characteristics through the plate bearing test 55 Zdzisław PAWLAK, Michał GUMINIAK The application of fundamental solutions in static analysis of thin plates resting on the internal elastic support 67 Jan PEIRS, Patricia VERLEYSEN, Joris DEGRIECK The use of hat-shaped specimens for dynamic shear testing 97 Jerzy PIŁAT, Jan KRÓL The evaluation of ageing processes of the polymer modified bitumen by image analysis 113