000009330 001__ 9330
000009330 005__ 20141205150155.0
000009330 04107 $$aeng
000009330 046__ $$k2008-10-12
000009330 100__ $$aAbdel Raheem, Shehata E.
000009330 24500 $$aSpatial Variation Effects on Seismic Response Control of Cable-Stayed Bridges

000009330 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009330 260__ $$b
000009330 506__ $$arestricted
000009330 520__ $$2eng$$aThe spatial variability of the input ground motion at the supporting foundations plays a key role in the structural response of flexible long span bridges such as cable-stayed and suspension bridges, therefore the spatial variation effects should be included in the analysis and design of effective vibration control systems for such horizontally extended structures. The control of long-span bridges represents a challenging and unique problem, with many complexities in modelling, control design and implementation, the control system should be designed not only to mitigate the dynamic component of the structural response but also to counteract the effects of the pseudo-static component of the response. The feasibility and efficiency of seismic control systems for the vibration control of cable-stayed bridge under multiple support excitations are investigated. The effect of the spatial variability of the ground motion in the analysis of seismically controlled long span bridges is considered based on the decomposition of the total structural response into a dynamic component and a pseudo-static component. The assumption of uniform earthquake motion along the entire bridge could be unrealistic for long span bridges since the differences in ground motion among different supports due to travelling seismic waves may result in quantitative and qualitative differences in seismic response as compared with those produced by uniform motion at all supports. Comparison of the response due to non-uniform input with the response due to uniform input demonstrates the importance of accounting for spatial variability of excitations; different wave propagation velocities are undertaken in the dynamic analysis of the controlled cable-stayed bridge.

000009330 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009330 653__ $$aCable-stayed bridges, vibration control, ground motion spatial variation, seismic design

000009330 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009330 720__ $$aAbdel Raheem, Shehata E.$$iHayashikawa, Toshiro$$iDorka.U.,
000009330 8560_ $$ffischerc@itam.cas.cz
000009330 8564_ $$s535188$$uhttps://invenio.itam.cas.cz/record/9330/files/05-02-0015.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0015.
000009330 962__ $$r9324
000009330 980__ $$aPAPER