City Research Online

Abstract

This paper studies for the first time the effect of the Spatial Variability of Ground Motions (SVGM) with large intensities on the inelastic seismic response of the pylons which are responsible for the overall structural integrity of cable-stayed bridges. The svgm is defined by the time delay of the earthquake at different supports, the loss of coherency of the seismic waves and the incidence angle of the ground motion. An extensive study is conducted on cable-stayed bridges with ‘H’- and inverted ‘Y’-shaped pylons and with main spans of 200, 400 and 600 m. The svgm is most detrimental to the pylon of the 200-m span bridge owing to the large stiffness of this bridge compared to its longer counterparts. The stiff configuration of the inverted ‘Y’-shaped pylon makes it more susceptible against the multi-support excitation than the flexible ‘H’-shaped pylon, especially in the transverse direction of the response. Finally, the earthquake incidence angle is strongly linked with the svgm and should be included in the seismic design of cable-stayed bridges.

Publication Type:	Article
Additional Information:	This is a post-peer-review, pre-copyedit version of an article published in Bulletin of Earthquake Engineering. The final authenticated version is available online at: https://doi.org/10.1007/s10518-021-01079-z
Publisher Keywords:	spatial variability, cable-stayed bridges, pylon, incidence angle, non-linear dynamic analysis, incoherence effect, wave-passage effect
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TG Bridge engineering
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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