1,721,050 research outputs found
A nonlinear procedure for the analysis of RC beams
No full textAbstractThis work deals with the development of a computational method for the nonlinear analysis of reinforced concrete beams subjected to general loading and constraint conditions, able to catch crack formation and propagation. To this aim, a layered beam finite element is developed. The displacement field along beam axis and height is modelled through polynomial functions, whose number of terms is varied based on the complexity of the considered problem. The mechanical nonlinearity of the material is taken into account by implementing a smeared constitutive model for cracked reinforced concrete elements. The effectiveness of the proposed procedure, which can be applied to the analysis of both new and existing buildings, is proved through comparison with significant experimental data from technical literature, relative to both statically determinate and indeterminate beams
Su un modello per l'analisi di rocce fessurate, rinforzate con la tecnica della bullonatura
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Nonlinear model for plane reinforced concrete frames
No full textA nonlinear finite element model is proposed in order to analyse reinforced concrete frames. The finite element adopted is constituted by an elastic beam, having axial and flexural stiffness, connected to nodes by means of two potential generalised plastic hinges, having rigid-perfectly plastic behaviour. Activation of plastic hinges occurs as internal forces reach the interaction diagram of the cross-section. The model calculates collapse load, as well as displacements, internal forces, reactions and plastic hinge rotations throughout a load incremental procedure. On the basis of the proposed model a computer program was developed and tested by comparison with numerical data available in literature
Analisi non lineare di elementi in conglomerato armato fibrorinforzato, soggetti a torsione pura
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