This paper deals with the assessment of the seismic response of a portal frame pier belonging to an old reinforced concrete viaduct. A series of tests, consisting of cyclically imposed displacements, were carried out on three 1:4 scale mock-ups. The objective of the experimental campaign is twofold: (1) identification and evaluation of the local failure mechanisms and (2) calibration of a numerical model including all observed nonlinear phenomena. The experimental results show that the shear strength of the transverse beam and of the beam–column joints characterizes the post-elastic behavior of the piers. Other phenomena, like bond-slip and buckling of the longitudinal bars of the columns, typical of old reinforced concrete structures have also been observed. Finally, a numerical model, built in OpenSEES, was calibrated to reproduce in a satisfactory way the experimental results and to provide a reliable tool for the evaluation of the seismic response of the pier.
Paolacci F, & Giannini R (2012). An experimental and numerical investigation on the cyclic response of a portal frame pier belonging to an old reinforced concrete viaduct. EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 41(6), 1109-1127 [10.1002/eqe.1175].
Titolo: | An experimental and numerical investigation on the cyclic response of a portal frame pier belonging to an old reinforced concrete viaduct | |
Autori: | ||
Data di pubblicazione: | 2012 | |
Rivista: | ||
Citazione: | Paolacci F, & Giannini R (2012). An experimental and numerical investigation on the cyclic response of a portal frame pier belonging to an old reinforced concrete viaduct. EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 41(6), 1109-1127 [10.1002/eqe.1175]. | |
Abstract: | This paper deals with the assessment of the seismic response of a portal frame pier belonging to an old reinforced concrete viaduct. A series of tests, consisting of cyclically imposed displacements, were carried out on three 1:4 scale mock-ups. The objective of the experimental campaign is twofold: (1) identification and evaluation of the local failure mechanisms and (2) calibration of a numerical model including all observed nonlinear phenomena. The experimental results show that the shear strength of the transverse beam and of the beam–column joints characterizes the post-elastic behavior of the piers. Other phenomena, like bond-slip and buckling of the longitudinal bars of the columns, typical of old reinforced concrete structures have also been observed. Finally, a numerical model, built in OpenSEES, was calibrated to reproduce in a satisfactory way the experimental results and to provide a reliable tool for the evaluation of the seismic response of the pier. | |
Handle: | http://hdl.handle.net/11590/135549 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |