In the paper an innovative formulation of a FEM computational model for the analysis of elastoplastic 3D truss-frame structures is developed within the framework of the Theory of Plasticity and Limit Analysis. Reference application is made to a historical iron arch bridge. Original computational features implemented in the solving algorithm allow for tracking the limit structural behavior of the bridge, by reaching convergence with smooth runs up to the true limit load and by tracing the corresponding collapse displacements. This is achieved disregarding for the considerable number of dofs of the whole structural model, ranging in the order of thirteen thousands.

Limit Analysis of a historical iron arch bridge. Formulation and computational implementation.

COCCHETTI, GIUSEPPE;RIZZI, EGIDIO
2016

Abstract

In the paper an innovative formulation of a FEM computational model for the analysis of elastoplastic 3D truss-frame structures is developed within the framework of the Theory of Plasticity and Limit Analysis. Reference application is made to a historical iron arch bridge. Original computational features implemented in the solving algorithm allow for tracking the limit structural behavior of the bridge, by reaching convergence with smooth runs up to the true limit load and by tracing the corresponding collapse displacements. This is achieved disregarding for the considerable number of dofs of the whole structural model, ranging in the order of thirteen thousands.
3D truss-frame structures; Evolutive perfectly-plastic structural analysis; Historical iron arch bridge; Limit Analysis; Non-linear elastoplastic FEM model; “Exact” collapse; Civil and Structural Engineering; Modeling and Simulation; Materials Science (all); Mechanical Engineering; Computer Science Applications1707 Computer Vision and Pattern Recognition
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1011712
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