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Analytical Model for Geometric and Material Nonlinear Analysis of Externally Prestressed Beams |
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| Authors: | Andrea Dall’Asta Laura Ragni Alessandro Zona |
| Affiliation: | 1Professor, Dipartimento di Progettazione e Costruzione dell’Ambiente, Univ. of Camerino, Viale della Rimembranza, 63100 Ascoli Piceno, Italy (corresponding author). E-mail: dallasta@unicam.it 2Assistant Professor, Dipartimento di Architettura, Costruzioni e Strutture, Marche Polytechnic University, via Brecce Bianche, 60131 Ancona, Italy; formerly, Ph.D. Candidate, Dipartimento di Progettazione e Costruzione dell’Ambiente, Univ. of Camerino, Viale della Rimembranza, 63100 Ascoli Piceno, Italy. E-mail: laura.ragni@univpm.it 3Assistant Professor, Dipartimento di Progettazione e Costruzione dell’Ambiente, Univ. of Camerino, Viale della Rimembranza, 63100 Ascoli Piceno, Italy. E-mail: alessandro.zona@unicam.it |
| Abstract: | The analysis of beams prestressed by external slipping tendons involves various difficulties related to the coupling between the local strain of the tendons and the global deformation of the beam. The structural behavior of the beam–tendon system at collapse is ruled both by the nonlinearity of materials and by geometric nonlinear effects. Recent scientific papers have shown the relevance of the geometric effects in evaluating the failure load of externally prestressed beams by considering the tendon eccentricity variation. The change of eccentricity is however only one of the geometric nonlinear effects. In this work the writers present a complete geometric and mechanical nonlinear analytical model based on the theory of small strains and moderate rotations deduced from the finite deformation theory. |
| Keywords: | Prestressing Nonlinear analysis Material properties Beams Deformation |