Seismic assessment of reinforced concrete (RC) buildings under seismic loading requires the ability to model the effective non-linear response and to identify the relevant failure modes of the structure. Due to the lack of application of capacity design principles, existing RC structures can exhibit premature shear failures with a reduction of available strength and ductility. In the last couple of decades some state-of-the-art simplified models aiming at capturing the complex interaction between shear and flexural damage mechanisms have been proposed and implemented in regulatory building codes and guidelines. The present paper presents how the shear–flexure interaction can be implemented in finite-element analysis. A beam-column element has been developed assembling together different sub-elements which interact throughout the analysis to simulate inelastic flexural, bonding and shear response. In particular, the sub-element accounting for the shear behaviour explicitly provides strength degradation with the increase of the inelastic curvature demand. Based on this model, a series of validation analysis have been performed, in order to verify the reliability of the formulation.
Flexure-Shear Interaction in Seismic Assessment of Reinforced Concrete Buildings
Alessandro RASULO;
2019-01-01
Abstract
Seismic assessment of reinforced concrete (RC) buildings under seismic loading requires the ability to model the effective non-linear response and to identify the relevant failure modes of the structure. Due to the lack of application of capacity design principles, existing RC structures can exhibit premature shear failures with a reduction of available strength and ductility. In the last couple of decades some state-of-the-art simplified models aiming at capturing the complex interaction between shear and flexural damage mechanisms have been proposed and implemented in regulatory building codes and guidelines. The present paper presents how the shear–flexure interaction can be implemented in finite-element analysis. A beam-column element has been developed assembling together different sub-elements which interact throughout the analysis to simulate inelastic flexural, bonding and shear response. In particular, the sub-element accounting for the shear behaviour explicitly provides strength degradation with the increase of the inelastic curvature demand. Based on this model, a series of validation analysis have been performed, in order to verify the reliability of the formulation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
