Seismic Displacements Reduction for a Long-Span Cable-Stayed Bridge

Abstract:

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Floating or semi-floating systems are usually employed for long-span cable-stayed bridges to lengthen their fundamental periods, and accordingly, to reduce their seismic inertial force, but the structures’ seismic displacements could be increased by utilizing these systems. Taking Yong-jiang railway cable-stayed bridge which has a low center of gravity as engineering background, the function of viscous dampers in controlling seismic displacements is studied. Firstly, the rational parameters of dampers are determined by parametric analysis, and then the seismic displacements and forces of the bridge, utilizing and un-utilizing viscous dampers, are compared. The results show that: viscous dampers are efficient in controlling seismic displacements of the bridge; the seismic shear forces at the bottom of towers are reduced slightly and the corresponding moments are reduced in a larger extent for cable-stayed bridge with low center of gravity.

Info:

Periodical:

Advanced Materials Research (Volumes 255-260)

Edited by:

Jingying Zhao

Pages:

840-845

DOI:

10.4028/www.scientific.net/AMR.255-260.840

Citation:

X. W. Yang and Z. B. Lian, "Seismic Displacements Reduction for a Long-Span Cable-Stayed Bridge", Advanced Materials Research, Vols. 255-260, pp. 840-845, 2011

Online since:

May 2011

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Price:

$35.00

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