2023 Volume 69B Pages 315-325
A formula to predict the peak displacement response for low-to-mid rise buildings deforming in flexure had been previously proposed. This formula is applicable to buildings with fundamental periods within the constant velocity range of the design spectra and is a function of the damping correction coefficient and the ductility factor.
In this study, the equivalent damping coefficient was calculated considering the energy dissipated through a one-cycle loop encompassing the maximum response obtained from earthquake response analysis. Furthermore, the damping correction coefficient equation based on the ductility response and elastic damping coefficient was found to be reasonably accurate based on structural analysis. The product of the response reduction factor due to damping and the square root of ductility response was approximately 1.0, which allowed the previously proposed displacement estimate equations to be simplified further. In addition, the previous method underestimated the displacement response at greater ductility values, so a new equation was proposed for such cases.
