Numerical analysis of bridge falsework Cuplok systems

What is it about?

Bridge falsework systems are one of the most common temporary structures used in the construction industry, namely to support the formwork during the construction of cast-in-place concrete bridges. In this paper, the results of advanced numerical studies of selected structural systems are presented using a novel joint finite element and information gathered from an extensive experimental campaign of various types of joints commonly found on Cuplok® falsework structures.

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Why is it important?

Different hazardous scenarios identified as being critical to the structural performance of bridge falsework systems are analysed, such as (i) ground settlements, (ii) bracing configurations and (iii) falsework systems using steel beam girders. For each considered hazardous scenario, the structural behaviour and resistance are analysed and discussed. From the results, relevant practical information was obtained which 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 by more than 10% the resistance of the system. In addition, for falsework systems using steel beam girders, it was demonstrated that inappropriate bracing of falsework towers could lead to a 50% reduction of resistance of the system.