The performance and the possible improvements of an existing beam spread-plasticity model have been investigated in this work, focusing on the case study of a lightly reinforced shear wall. The experimental response of the CAMUS I wall, tested on a shaking table under a sequence of five accelerograms, has been assumed as a benchmark. The wall response is strongly influenced by two non linear phenomena, namely the strength reduction due to M-N interaction and the stiffness degradation produced by cyclic shear, here quite pronounced due to the small amount of transverse reinforcement. The reproduction of these phenomena have been tackled first of all through an accurate set-up of the numerical model. Secondly, without modifying the model formulation, the hysteretic relationship governing the behaviour of the plastic hinge regions has been upgraded to include both degraded unloading and pinching branches. The numerical results match satis-factorily the experimental data, confirming the model capability in the non linear dynamic analyses of the wall at study.

Macro-scale modelling for the seismic analysis: a case study.

MARTINELLI, PAOLO;MULAS, MARIA GABRIELLA
2006-01-01

Abstract

The performance and the possible improvements of an existing beam spread-plasticity model have been investigated in this work, focusing on the case study of a lightly reinforced shear wall. The experimental response of the CAMUS I wall, tested on a shaking table under a sequence of five accelerograms, has been assumed as a benchmark. The wall response is strongly influenced by two non linear phenomena, namely the strength reduction due to M-N interaction and the stiffness degradation produced by cyclic shear, here quite pronounced due to the small amount of transverse reinforcement. The reproduction of these phenomena have been tackled first of all through an accurate set-up of the numerical model. Secondly, without modifying the model formulation, the hysteretic relationship governing the behaviour of the plastic hinge regions has been upgraded to include both degraded unloading and pinching branches. The numerical results match satis-factorily the experimental data, confirming the model capability in the non linear dynamic analyses of the wall at study.
2006
Computational Modelling of Concrete Structures.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/538771
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