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MERLIN, A. J. (2006). Probabilistic analysis of the long-term behavior of partially precast elements, with emphasis on deflections of slabs with lattice reinforcement. São Carlos, 2006. 212p + appendix. Thesis (Ph.D.) – Escola de Engenharia de São Carlos, Universidade de São Paulo. The goal of this research is to present a probabilistic analysis model of the long-term behavior of concrete structures. For that, the probabilistic analysis is carried out together with numerical analysis. The numerical analysis is carried out using a software based on the finite element method that takes into account the nonlinear and time dependent behavior of the materials, as well as the evolutionary construction process. A probabilistic analysis is carried out in order to determine the effects of the uncertainties of the parameters, using latin hypercube sampling method. The presented model can be applied in the probabilistic analysis of the long-term behavior of concrete structures in general. However, it was applied in the analysis of the long-term deflections of precast slabs made by joist with lattice reinforcement. By this analysis, a multiplier coefficient of immediate deflections to evaluate long-term deflections could be proposed. The multiplier coefficient obtained for precast slabs made by joist with lattice reinforcement can reach values much higher than the factor f α recommended by NBR 6118 (2003) for the case of reinforced concrete beams.

Análise probabilística do comportamento ao longo do tempo de elementos parcialmente pré-moldados com ênfase em flechas de lajes com armação treliçada