000009341 001__ 9341
000009341 005__ 20141205150156.0
000009341 04107 $$aeng
000009341 046__ $$k2008-10-12
000009341 100__ $$aAdhikari, Gopal
000009341 24500 $$aIs Direct Displacement Based Design Valid for Long Span Bridges?

000009341 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009341 260__ $$b
000009341 506__ $$arestricted
000009341 520__ $$2eng$$aThe paper investigates the applicability of current direct displacement based seismic design (DDBD) procedure, developed by Priestley and his coworkers, for straight long span bridges under transverse seismic excitation synchronous to all supports. This category of bridges often possess some additional features such as massive tall piers, highly irregular distribution of mass and stiffness due to unequal superstructure spans and pier heights, large deformation capacity etc. that are absent in short-to-moderate span bridges for which DDBD has extensively been verified. It is shown that DDBD in its current form is unable to capture both displacement and base shear demand when compared with nonlinear dynamic analysis results. Accordingly, a simple mechanics based extension of the current procedure that takes into account the effect of pier mass while computing base shear demand as well as a modal combination rule for estimating displacement demand is proposed and validated using a series of parametric studies. The new procedure also allows engineer to allocate strength at the potential plastic hinge location in more general terms.

000009341 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009341 653__ $$aBridge analysis, direct displacement based design, long span bridges.

000009341 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009341 720__ $$aAdhikari, Gopal$$iPetrini, Lorenza$$iCalvi, Gian M.
000009341 8560_ $$ffischerc@itam.cas.cz
000009341 8564_ $$s413177$$uhttps://invenio.itam.cas.cz/record/9341/files/05-02-0098.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0098.
000009341 962__ $$r9324
000009341 980__ $$aPAPER