Prediction of Residual Displacement of SDOF System from its Peak Inelastic Displacement

Abstract:

Residual displacement is an important measure of post-earthquake functionality of engineering structures. Empirical equations for prediction of residual displacement of SDOF system from its peak inelastic displacement were proposed through a comprehensive statistical analysis. An inelastic seismic analysis model including the P-Δ effect was employed to assess the residual and peak inelastic displacements of SDOF system under horizontal and vertical excitations. The correlation and empirical equations between residual and peak inelastic displacements were discussed based on 69 selected earthquake records. Results show that the correlation between residual and peak inelastic displacements are of high correlation, and the mean of residual-to-peak displacement ratio increases with the increase of period of vibration or stability factor. Furthermore, the coefficient of variation of residual-to-peak displacement ratio decreases with the increase of the period of vibration dramatically for rigid systems and is generally independent of the stability factor and the normalized yield strength.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 1415-1418
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.1415
• Online since: January 2013
• Authors: Bo Yu, Di Liu, Lu Feng Yang
• Keywords: Peak Inelastic Displacement, P-Δ Effect, Residual Displacement

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