000018940 001__ 18940
000018940 005__ 20170118182249.0
000018940 04107 $$aeng
000018940 046__ $$k2017-01-09
000018940 100__ $$aWang, Yuandong
000018940 24500 $$aSeismic Assessment for Retrofitted Skewed Reinforced Concrete Box Girder Bridges With Buckling Restrained Braces

000018940 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018940 260__ $$b
000018940 506__ $$arestricted
000018940 520__ $$2eng$$aIn this study, buckling restrained braces (BRBs) are implemented as a potential retrofit strategy to mitigate damage in skewed bridges. For this purpose, a three-span reinforced concrete (RC) box girder skewed bridge was used as a case study. A three-dimensional (3-D) model was developed in OpenSees to incorporate BRBs between bent columns. The model includes soil-structure interaction effects adjusted by recent results from skewed backfill-abutment interaction experiments. This paper assesses the impacts of five different BRB designs on the performance of skewed concrete box girder bridges with different skewed angles. Nonlinear time history analyses (THAs) were performed to assess effect of BRBs on the seismic performance of skewed bridges. The seismic behavior of skewed bridges can be significantly different from that of straight bridges due to potential torsional effects caused by the combination of longitudinal and transverse seismic responses. Therefore, optimized BRB designs were developed for a certain skew angle. The results present a considerable vulnerability of original skewed bridges to deck rotation and shear key failure. After retrofit implementation, the BRBs in column bents can redistribute and dissipate energy in transverse direction of the skewed bridges, reducing the potential failure of the abutment shear keys and concrete columns. The influence of skew angle and BRB properties were also identified.

000018940 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018940 653__ $$aSkewed bridges; Buckling restrained braces; Seismic retrofit; Optimization design

000018940 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018940 720__ $$aWang, Yuandong$$iIbarra, Luis$$iPantelides, Chris
000018940 8560_ $$ffischerc@itam.cas.cz
000018940 8564_ $$s1562511$$uhttps://invenio.itam.cas.cz/record/18940/files/2531.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2531.
000018940 962__ $$r16048
000018940 980__ $$aPAPER