Improved effective damping equation for equivalent linear analysis of seismic-isolated bridges

2010-07-25
In this paper, an improved effective damping (ED) equation is proposed to obtain more reasonable estimates of the actual nonlinear response of seismic-isolated bridges (SIB) using equivalent linear (EL) analysis procedure. For this purpose, first, the EL analysis results using AASHTO's ED equation is evaluated. The effect of several parameters such as substructure stiffness, isolator and ground motion properties are considered in the evaluation. It is found that AASHTO's ED equation should incorporate the effective period of the SIB and isolator properties for a more accurate estimation of the seismic response quantities. A new ED equation that includes such parameters is formulated and found to improve the accuracy of the EL analysis.
9th US National and 10th Canadian Conference on Earthquake Engineering 2010

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Citation Formats
M. Dicleli, “Improved effective damping equation for equivalent linear analysis of seismic-isolated bridges,” Toronto, Canada, 2010, vol. 8, p. 6169, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/87142.