[article]
Titre : |
Quasi-static and pseudo-dynamic testing of unbonded post-tensioned rocking bridge piers with external replaceable dissipaters |
Type de document : |
texte imprimé |
Auteurs : |
Dion Marriott, Auteur ; Pampanin, Stefano, Auteur ; Alessandro Palermo, Auteur |
Article en page(s) : |
pp. 331-354 |
Note générale : |
Génie Civil |
Langues : |
Anglais (eng) |
Mots-clés : |
Bridge piers Unbonded post-tensioning Cyclic tests Pseudo-dynamic External replaceable dissipaters Energy dissipation |
Index. décimale : |
624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels |
Résumé : |
It has been well documented that following a major earthquake a substantial percentage of economic loss results from downtime of essential lifelines in and out of major urban centres. This has thus led to an improvement of both performance-based seismic design philosophies and to the development of cost-effective seismic structural systems capable of guaranteeing a high level of protection, low structural damage and reduced downtime after a design-level seismic event. An example of such technology is the development of unbonded post-tensioned techniques in combination with rocking-dissipating connections.
In this contribution, further advances in the development of high-performance seismic-resistant bridge piers are achieved through the experimental validation of unbonded post-tensioned bridge piers with external, fully replaceable, mild steel hysteretic dissipaters.
The experimental response of three 1 : 3 scale unbonded, post-tensioned cantilever bridge piers, subjected to quasi-static and pseudo-dynamic loading protocols, are presented and compared with an equivalently reinforced monolithic benchmark. Minimal physical damage is observed for the post-tensioned systems, which exhibit very stable energy dissipation and re-centring properties. Furthermore, the external dissipaters can be easily replaced if severely damaged under a major (higher than expected) earthquake event. Thus, negligible residual deformations, limited repair costs and downtime can be achieved for critical lifeline components. Satisfactory analytical-experimental comparisons are also presented as a further confirmation of the reliability of the design procedure and of the modelling techniques. |
ISSN : |
0098-8847 |
En ligne : |
http://www3.interscience.wiley.com/journal/121502265/abstract |
in Earthquake engineering structural dynamics > Vol. 38 N°3 (Mars 2009) . - pp. 331-354
[article] Quasi-static and pseudo-dynamic testing of unbonded post-tensioned rocking bridge piers with external replaceable dissipaters [texte imprimé] / Dion Marriott, Auteur ; Pampanin, Stefano, Auteur ; Alessandro Palermo, Auteur . - pp. 331-354. Génie Civil Langues : Anglais ( eng) in Earthquake engineering structural dynamics > Vol. 38 N°3 (Mars 2009) . - pp. 331-354
Mots-clés : |
Bridge piers Unbonded post-tensioning Cyclic tests Pseudo-dynamic External replaceable dissipaters Energy dissipation |
Index. décimale : |
624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels |
Résumé : |
It has been well documented that following a major earthquake a substantial percentage of economic loss results from downtime of essential lifelines in and out of major urban centres. This has thus led to an improvement of both performance-based seismic design philosophies and to the development of cost-effective seismic structural systems capable of guaranteeing a high level of protection, low structural damage and reduced downtime after a design-level seismic event. An example of such technology is the development of unbonded post-tensioned techniques in combination with rocking-dissipating connections.
In this contribution, further advances in the development of high-performance seismic-resistant bridge piers are achieved through the experimental validation of unbonded post-tensioned bridge piers with external, fully replaceable, mild steel hysteretic dissipaters.
The experimental response of three 1 : 3 scale unbonded, post-tensioned cantilever bridge piers, subjected to quasi-static and pseudo-dynamic loading protocols, are presented and compared with an equivalently reinforced monolithic benchmark. Minimal physical damage is observed for the post-tensioned systems, which exhibit very stable energy dissipation and re-centring properties. Furthermore, the external dissipaters can be easily replaced if severely damaged under a major (higher than expected) earthquake event. Thus, negligible residual deformations, limited repair costs and downtime can be achieved for critical lifeline components. Satisfactory analytical-experimental comparisons are also presented as a further confirmation of the reliability of the design procedure and of the modelling techniques. |
ISSN : |
0098-8847 |
En ligne : |
http://www3.interscience.wiley.com/journal/121502265/abstract |
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