Under the large forces transmitted by a bridge structure during an earthquake, a bridge abutment may undergo significant displacements deriving from the mobilisation of both the soil and the structural strength. In some cases a controlled yielding of the abutment may produce favourable effects, dissipating seismic energy and limiting the seismic actions into the superstructure. In fact, the bridge design could explicitly account for dissipative features of the soil-abutment system, allowing a certain amount of irreversible displacements compatible with a prescribed performance level. The present paper focuses on the plastic response of the soil-abutment system, examining its potential plastic mechanisms. With the aid of numerically-evaluated limit analysis solutions, different plastic mechanisms are identified, including those associated with combined yielding of the soil and the abutment structure. On the basis of the above results, the paper presents a model describing the capacity surface of bridge abutments subjected to multi-axial loading conditions, that can be identified through the calibration of a limited number of parameters. It is shown that the inertial effects associated to the seismic loading can be incorporated into the model through a contraction and a rotation of the ultimate limit surface. The proposed model can be either included in a plasticity-based macro-element to model the bridge abutments, or it can be used for a direct evaluation of abutment in a force-based approach.

Ultimate design capacity of bridge abutments / Gorini, DAVIDE NOE'; John Whittle, Andrew; Callisto, Luigi. - (2019), pp. 2682-2689. [10.1201/9780429031274].

Ultimate design capacity of bridge abutments

Davide Noè Gorini
Primo
;
Luigi Callisto
Ultimo
2019

Abstract

Under the large forces transmitted by a bridge structure during an earthquake, a bridge abutment may undergo significant displacements deriving from the mobilisation of both the soil and the structural strength. In some cases a controlled yielding of the abutment may produce favourable effects, dissipating seismic energy and limiting the seismic actions into the superstructure. In fact, the bridge design could explicitly account for dissipative features of the soil-abutment system, allowing a certain amount of irreversible displacements compatible with a prescribed performance level. The present paper focuses on the plastic response of the soil-abutment system, examining its potential plastic mechanisms. With the aid of numerically-evaluated limit analysis solutions, different plastic mechanisms are identified, including those associated with combined yielding of the soil and the abutment structure. On the basis of the above results, the paper presents a model describing the capacity surface of bridge abutments subjected to multi-axial loading conditions, that can be identified through the calibration of a limited number of parameters. It is shown that the inertial effects associated to the seismic loading can be incorporated into the model through a contraction and a rotation of the ultimate limit surface. The proposed model can be either included in a plasticity-based macro-element to model the bridge abutments, or it can be used for a direct evaluation of abutment in a force-based approach.
2019
Earthquake Geotechnical Engineering for Protection and Development of environment and constructions
978-0-367-14328-2
plastic mechanisms; bridge abutments; inertial effects; capacity surface
02 Pubblicazione su volume::02a Capitolo o Articolo
Ultimate design capacity of bridge abutments / Gorini, DAVIDE NOE'; John Whittle, Andrew; Callisto, Luigi. - (2019), pp. 2682-2689. [10.1201/9780429031274].
File allegati a questo prodotto
File Dimensione Formato  
GORINI_Ultimate_2019.pdf

solo gestori archivio

Note: https://www.crcpress.com/Earthquake-Geotechnical-Engineering-for-Protection-and-Development-of-Environment/Silvestri-Moraci/p/book/9780429031274
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 907.4 kB
Formato Adobe PDF
907.4 kB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1332054
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 1
social impact