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Bidirectional seismic behavior of controlled rocking four-legged bridge steel truss piers in Journal of structural engineering, Vol. 136 N° 12 (Décembre 2010)
Bidirectional seismic behavior of controlled rocking four-legged bridge steel truss piers [texte imprimé] / Michael Pollino, Auteur ; Michel Bruneau, Auteur . - 2011 . - pp. 1512-1522.
Génie Civil
Langues : Anglais (eng)
in Journal of structural engineering > Vol. 136 N° 12 (Décembre 2010) . - pp. 1512-1522
Mots-clés : Controlled rocking Seismic Behavior Design Bridge piers Rocking Passive energy dissipation Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The behavior and design of four-legged controlled rocking bridge steel truss piers to three components of seismic excitation are presented in this paper. The controlled rocking approach for seismic protection allows a pier to uplift from its base, limiting the force demands placed on the bridge pier and deck, and can allow the structure to remain elastic during an earthquake, preventing damage toward the goal of keeping the bridge operational immediately following the earthquake. Passive energy dissipation devices [steel yielding devices (SYDs) or fluid viscous dampers (VDs)] are used at the uplifting location to control pier response. The bidirectional kinematic and hysteretic cyclic behavior of controlled rocking piers with SYDs is presented and verified with nonlinear static pushover analysis. This fundamental behavior is used to develop design equations to predict peak pier displacements, uplifting displacements, and forces (frame shear and leg axial force). Dynamic response history analyses are performed, compared with the design equations, and shown to provide reasonably accurate results for design. The use of fluid VDs in the controlled rocking system is then discussed.
DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v136/i12/p1512_s1?isAuthorized=no
