Abstract
Bridge falsework systems are one of the most common temporary structures used in the construction industry to support formwork during the construction of cast-in-place concrete bridges. This paper presents the results of advanced numerical studies of selected structural systems using a novel joint finite element and information gathered from an extensive experimental campaign of various types of joints commonly found in Cuplok falsework structures. Different hazardous scenarios identified as being critical to the structural performance of bridge falsework systems are analysed, such as ground settlements, bracing configurations and falsework systems using steel beam girders. For each considered hazardous scenario, structural behaviour and resistance are analysed and discussed. From the results, relevant practical information was obtained that can be used to reduce the risks associated with bridge falsework systems. For example, it was found that even a small value of isolated differential ground settlements could reduce the resistance of the system by more than 10%. In addition, for falsework systems using steel beam girders, it was found that inappropriate bracing of falsework towers could lead to a 50% reduction in system resistance.
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