000009455 001__ 9455
000009455 005__ 20141205150207.0
000009455 04107 $$aeng
000009455 046__ $$k2008-10-12
000009455 100__ $$aAvsar, Ozgur
000009455 24500 $$aEffect of Cap Beam to Column Inertia Ratio on Transverse Seismic Response of Multi Column Bridge Bents

000009455 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009455 260__ $$b
000009455 506__ $$arestricted
000009455 520__ $$2eng$$aIn seismic design of bridge bents typically plastic deformations are allowed to occur at bridge column ends while the rest of bridge components remain essentially elastic due to maintenance and retrofit concerns. Based on observations of failures at past major earthquakes, CALTRANS bridge seismic code is structured in such a way that a ductile seismic response is preferred over a more rigid and brittle seismic response that targets to eliminate or minimize shear failures at bridge columns. Cap beam, expected to remain in essentially elastic range, can indirectly affect displacement ductility capacity of these bents. However, there exists considerable amount of examples of bridge bents having stumpy and rigid columns and flexible cap beam. In such a case, development of flexural plastic hinges takes place at cap beam and columns can experience shear failure before occurrence of flexural plastic hinges, showing a brittle mode of bridge failure. To investigate the consequences of such conditions, two different multi-column bridge bent examples are studied in transverse direction of bridge through pushover analysis. Bridge bent with a flexible cap beam, which is designed according to current design philosophy, has lower displacement ductility capacity due to the greater yield displacement capacity of bent. Pushover analysis showed that bridges having bents with stronger columns and weaker cap beam can display poor seismic behavior due to shear failure of columns or localizing inelastic region only at cap beam through formation of plastic hinges. Damaged cap beams can also risk unseating of superstructure.

000009455 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009455 653__ $$abridge bent, seismic performance, displacement ductility

000009455 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009455 720__ $$aAvsar, Ozgur$$iCaner, Alp$$iYakut, Ahmet
000009455 8560_ $$ffischerc@itam.cas.cz
000009455 8564_ $$s308600$$uhttps://invenio.itam.cas.cz/record/9455/files/06-0024.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 06-0024.
000009455 962__ $$r9324
000009455 980__ $$aPAPER