000019357 001__ 19357
000019357 005__ 20170118182314.0
000019357 04107 $$aeng
000019357 046__ $$k2017-01-09
000019357 100__ $$aErochko, Jeffrey
000019357 24500 $$aImproving the Seismic Performance of Existing Bridge Structures Using Self-Centering Dampers

000019357 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019357 260__ $$b
000019357 506__ $$arestricted
000019357 520__ $$2eng$$aSelf-centering (SC) systems are relatively new seismic resistant structural systems that reduce or eliminate the residual drifts and deformations of structures caused by earthquakes. In engineering practice, although some of the earliest applications of self-centering systems were in bridges, the majority of existing self-centering systems are for building applications to increase the chance that the building will still be serviceable after an earthquake. Bridge structures can suffer similar excessive drifts or residual displacements in earthquakes, which can result in lengthy traffic closures, costly repair or even demolition after an earthquake. The goal of this study is to improve bridge performance by using a self-centering lateral load resisting cross brace element that was designed originally for use in buildings. This brace, the self-centering energy-dissipative (SCED) brace may be applied to a bridge as a retrofit solution, unlike many other currently used selfcentering bridge systems which require rocking piers. This is especially important since the vast majority of necessary bridges are already built and many of them are currently deficient. The benefits of employing the self-centering brace to retrofit two seismically deficient bridges are investigated. The bridges are modeled using OpenSEES and are subjected to simulated earthquakes at the maximum credible hazard level. The performance of the self-centering retrofitted bridges are evaluated and compared with those of the original structures. The results demonstrate the self-centering brace systems are effective in reducing the maximum drift and eliminating the residual displacement of the bridges during and after the seismic events.

000019357 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019357 653__ $$aSelf-centering, Retrofit, Bridges, Reinforced Concrete, Seismic Performance

000019357 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019357 720__ $$aErochko, Jeffrey$$iLau, David$$iCheng, Xi
000019357 8560_ $$ffischerc@itam.cas.cz
000019357 8564_ $$s1431239$$uhttps://invenio.itam.cas.cz/record/19357/files/3465.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3465.
000019357 962__ $$r16048
000019357 980__ $$aPAPER