000019025 001__ 19025
000019025 005__ 20170118182255.0
000019025 04107 $$aeng
000019025 046__ $$k2017-01-09
000019025 100__ $$aDusicka, Peter
000019025 24500 $$aSeismic Retrofitting of Reinforced Concrete Bridge Bents Utilizing Hysteretic Dampers

000019025 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019025 260__ $$b
000019025 506__ $$arestricted
000019025 520__ $$2eng$$aTypical reinforced concrete bridge bents constructed in the 1950 to mid-1970 in the Pacific Northwest of the United States were designed and built with minimum seismic considerations. As a result of this design practice, bridge bents have numerous deficiencies making them highly susceptible to damage following an earthquake. In this study, the performance assessment of a representative reinforced concrete bridge bent retrofitted using hysteretic dampers is investigated by performing nonlinear time history analysis. A refined numerical model is presented and validated in order to perform the nonlinear analyses. Special attention is put on assessing the bridge bent subjected to subduction zone ground motions. Buckling restrained braces (BRBs) is the main hysteretic damper investigated in this study. Other potential hysteretic devices for retrofitting RC bridge bents are also presented such as eccentrically braced frames (EBFs) and U-shaped dampers. The results of this study demonstrate the effectiveness of utilizing hysteretic dampers for achieving high displacement ductility of the retrofitted structure, while also controlling the damage of the existing vulnerable reinforced concrete bridge bent up to the required design performance level. The potential of improving the overall seismic behavior and the design performance levels with hysteretic dampers offers structural design professionals a viable method for performance driven retrofit of reinforced concrete bridge bents.

000019025 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019025 653__ $$aBridge seismic retrofit; reinforced concrete bridge bents; hysteretic dampers.

000019025 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019025 720__ $$aDusicka, Peter$$iBazaez, Ramiro
000019025 8560_ $$ffischerc@itam.cas.cz
000019025 8564_ $$s1235684$$uhttps://invenio.itam.cas.cz/record/19025/files/2703.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2703.
000019025 962__ $$r16048
000019025 980__ $$aPAPER