Abstract
In view of the current global climate challenges, the urgency for reduction of material consumption in the construction sector becomes clear. In this context, the present study concentrates on enhancing resource efficiency in concrete construction via the use of structural optimisation software tools as a guide for finding the geometry of optimised, mass-reduced concrete girders. Within a test series of eight specimens, varying parameters regarding the consulted optimisation strategy, the stirrup reinforcement type and concrete coverage were assessed. The experimental investigation was followed by a profound structural analysis, identifying peculiarities in the load-bearing behaviour and stiffness as well as two main failure modes characteristic of the optimised girder geometries. The comparison with full concrete girders illustrates the achieved reduction in concrete mass, the decrease of the Global Warming Potential of the production phase as well as the increase in the overall performance.
Published Version
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