The paper proposes a strategy for the treatment of load combinations making the shakedown analysis an affordable design tool for practical applications. The paper refers to 3D frames subjected to complex combinations of statical and dynamical loads defined according to Eurocode rules. The yield surface of the sections is defined by its support function values associated to presso-flexural mechanisms and it is approximated as Minkowski sum of ellipsoids. The detection of the significant vertexes of the elastic envelope is made possible by an efficient algorithm suitable for use in the case of response spectrum analyses.
CitationLeonetti, Leonardo; Casciaro, Raffaele; Garcea, Giovanni. Shakedown analysis of 3D frames subjected to complex statical and seismic load combinations. A: COMPLAS XIII. "COMPLAS XIII : proceedings of the XIII International Conference on Computational Plasticity : fundamentals and applications". CIMNE ed. Barcelona: CIMNE, 2015, p. 894-905.
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