caa a22 4500 445847484 CHVBK 20180317145403.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10518-010-9203-9 doi (NATIONALLICENCE)springer-10.1007/s10518-010-9203-9 Nonlinear dynamic v elastic analysis for seismic deformation demands in concrete bridges having deck integral with the piers [Elektronische Daten] [Vasilios Bardakis, Michael Fardis] Seismic deformations in concrete bridges having fairly long continuous deck integral with the piers and restrained transversely at the abutments but free to slide there longitudinally, are estimated via nonlinear dynamic analysis and compared to the corresponding outcomes of modal response spectrum analysis with 5% damping. Eight bridge configurations are studied, all with a box girder deck prestressed with bonded tendons, having three or five spans and piers of various cross-sections and about equal or very different heights. Two versions of each bridge are considered: one of conventional, force-based design and another having much less overstrength in the piers and developing less inelastic action in the deck. The piers are taken in the analysis with effective elastic stiffness equal to the secant stiffness to the yield point of their end section(s). The deck is discretized longitudinally into a string of nonlinear elements, whose moment-rotation relations are derived from moment-curvature analysis of the section in the two main directions of bending. Seven spectrum-compatible motions with Peak Ground Acceleration (PGA) of 0.25, 0.35 and 0.45 g on rock are applied in the longitudinal or transverse direction. Modal response spectrum analysis with 5% damping gives on average good—or at least safe-sided—predictions of inelastic deformation demands at the deck and the piers of regular bridges, especially under longitudinal earthquake. However, it underestimates inelastic deformation demands in bridges having piers of very different height, even when design measures are taken to harmonize stiffness across the piers. The stronger the ground motion, the larger are on average the elastic predictions of deformations relative to those from nonlinear dynamic analysis. Springer Science+Business Media B.V., 2010 Concrete bridges nationallicence Nonlinear dynamic analysis nationallicence Seismic design nationallicence Seismic response analysis nationallicence Bardakis Vasilios University of Patras, P.O. Box 1424, 26504, Patras, Greece aut Fardis Michael University of Patras, P.O. Box 1424, 26504, Patras, Greece aut Bulletin of Earthquake Engineering Springer Netherlands 9/2(2011-04-01), 519-535 1570-761X 9:2<519 2011 9 10518 https://doi.org/10.1007/s10518-010-9203-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10518-010-9203-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bardakis Vasilios University of Patras, P.O. Box 1424, 26504, Patras, Greece aut NATIONALLICENCE 700 1- Fardis Michael University of Patras, P.O. Box 1424, 26504, Patras, Greece aut NATIONALLICENCE 773 0- Bulletin of Earthquake Engineering Springer Netherlands 9/2(2011-04-01), 519-535 1570-761X 9:2<519 2011 9 10518 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer