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- W3042881497 abstract "The starting point of this work is the definition of an automatic procedure for evaluating the axial force-biaxial bending yield surface of steel and reinforced concrete sections in fire. It provides an accurate time-dependent expression of the yield condition by a section analysis carried out once and for all, accounting for the strength reduction of the materials, which is a function of the fire duration. The equilibrium state of 3D frames with such yield conditions, once discretized using beam finite elements, is then formulated as a nonlinear vectorial equation defining a curve in the hyperspace of the discrete variables and the fire duration. An incremental-iterative strategy is proposed for tracing this curve evaluating a sequence of safe states at increasing fire durations up to the limit fire duration, that is the time of exposure which leads to structural collapse. The procedure represents a global fire analysis able to take account of the stress redistribution over the frame. Numerical examples are given to illustrate the proposal." @default.
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- W3042881497 date "2020-07-17" @default.
- W3042881497 modified "2023-09-27" @default.
- W3042881497 title "Limit Fire Analysis of 3D Framed Structures Based on Time-Dependent Yield Surfaces" @default.
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- W3042881497 doi "https://doi.org/10.1007/978-3-030-48834-5_4" @default.
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