000013539 001__ 13539
000013539 005__ 20161114165845.0
000013539 04107 $$aeng
000013539 046__ $$k2011-05-25
000013539 100__ $$aKappos, A.
000013539 24500 $$aAn Improved Displacement-Based Seismic Design Methodology for Bridges Accounting for Higher Mode Effects

000013539 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013539 260__ $$bNational Technical University of Athens, 2011
000013539 506__ $$arestricted
000013539 520__ $$2eng$$aWeaknesses of existing methods for direct displacement-based design (DDBD) of bridges are pointed out and an improvement is suggested to account for higher mode effects, the key idea being not only the proper prediction of a target-displacement profile through the effective mode shape (EMS) method (wherein all significant modes are considered), but also the proper definition of the corresponding peak structural response. The proposed methodology is then verified by applying it to an actual bridge wherein the different pier heights and the unrestrained transverse displacement at the abutments result in an increased contribution of the second mode. A comparison between the extended and the 'standard' DDBD is conducted, while further issues such as additional design criteria leading to optimum design, the proper consideration of the degree of fixity at the pier’s top, and the effect of the deck’s torsional stiffness are also investigated. The resulting designs are evaluated using nonlinear response-history analysis (NLRHA) for a number of spectrum-compatible motions. Unlike the 'standard' DDBD, the extended procedure adequately reproduced the target-displacement profile providing at the same time a good estimate of results regarding additional design quantities such as yield displacements, displacement ductilities etc., closely matching the results of the more rigorous NLRHA. However, the need for additional iterations clearly indicates that practical application of the proposed procedure is feasible if it is fully ‘automated’, i.e. implemented in a software package.

000013539 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013539 653__ $$aDisplacement-Based Seismic Design, Bridges, Reinforced Concrete, Higher Mode Effects.

000013539 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013539 720__ $$aKappos, A.$$iGkatzogias, K.$$iGidaris, I.
000013539 8560_ $$ffischerc@itam.cas.cz
000013539 8564_ $$s1656433$$uhttp://invenio.itam.cas.cz/record/13539/files/256.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 05 Analysis Methods for the Seismic Design and Assessment of Bridges.
000013539 962__ $$r13401
000013539 980__ $$aPAPER