Potential of structural multi-objective optimization of reinforced concrete slabs in the context of sustainable development

Abstract

Reducing material usage and ensuring adequate performance and safety of bearing structures became fundamental aspects of modern engineering design and optimization. Reinforced concrete slabs in multi-storey buildings transfer vertical floor loads and horizontal shear loads to other bearing elements, such as walls, columns, or beams. They provide stability and contribute to overall structural integrity. Especially in large structures with a repeating floor plan over several storeys, material consumption in reinforced concrete slabs can add up quickly. Structural optimization aimed at reducing material usage can provide significant benefits in terms of sustainability and conservation of resources. This paper presents a recommendation for a framework of structural multi-objective optimization (MOO) of storey slabs made of reinforced concrete and highlights the need for efficient use of resources, especially in the context of sustainable development. A case study of the suggested structural MOO-framework is carried out on an existing concrete slab of a large residential building using “C-SLOP” (Concrete SLab OPtimizer), a tool developed for this purpose. Using the case study results as a basis, input parameters for the optimization process were calibrated in order to obtain more realistic results, to consider the structural aspects from the execution phase and to find an optimized design solution. The paper highlights the importance of multi-objective structural optimization of simple common bearing parts, such as reinforced concrete slabs, in early stages of structural design and emphasizes the potential for material savings in the construction industry.