Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Inelastic Displacement Amplification Factor for Ductile Structures with Constant Strength Reduction Factor

Inelastic Displacement Amplification Factor for Ductile Structures with Constant Strength... Based on elastic-plastic time-history earthquake analysis of the single degree of freedom (SDOF) system, the inelastic displacement amplification factor Cd2 of the elastic-perfectly plastic (EPP) model with the same yield strength reduction was investigated for different normalized periods T/TgR, site types, strength reduction factors R, damping ratios, post yield stiffness ratios and second order (P-Δ) effects. The factor Cd2 can be used to estimate the maximum inelastic response displacement from the elastic displacement under the design seismic conditions. It is found that the probability distribution of Cd2 satisfies the lognormal distribution approximately. The factor Cd2 decreases with decreasing damping (in the medium-long period range) and with increasing post yield stiffness. The existence of the P-Δ effect will increase Cd2 significantly and needs to be considered in future seismic design. Three other hysteretic models: the modified-Clough (MC), shear-slipped (SSP) and bilinear elastic (BIL) models, were analyzed to check the effect of the hysteretic model on Cd2 spectra The results were compared to those of the EPP model and it was found that the Cd2 of the EPP model is the smallest among the four hysteretic models. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Structural Engineering SAGE

Inelastic Displacement Amplification Factor for Ductile Structures with Constant Strength Reduction Factor

Zhao, Yongfeng; Tong, Genshu
Advances in Structural Engineering , Volume 13 (1): 14 – Feb 1, 2010
Download PDF
14 pages

Loading next page...
 
/lp/sage/inelastic-displacement-amplification-factor-for-ductile-structures-51XuGODZxE
Publisher
SAGE
Copyright
© 2010 SAGE Publications
ISSN
1369-4332
eISSN
2048-4011
DOI
10.1260/1369-4332.13.1.15
Publisher site
See Article on Publisher Site

Abstract

Based on elastic-plastic time-history earthquake analysis of the single degree of freedom (SDOF) system, the inelastic displacement amplification factor Cd2 of the elastic-perfectly plastic (EPP) model with the same yield strength reduction was investigated for different normalized periods T/TgR, site types, strength reduction factors R, damping ratios, post yield stiffness ratios and second order (P-Δ) effects. The factor Cd2 can be used to estimate the maximum inelastic response displacement from the elastic displacement under the design seismic conditions. It is found that the probability distribution of Cd2 satisfies the lognormal distribution approximately. The factor Cd2 decreases with decreasing damping (in the medium-long period range) and with increasing post yield stiffness. The existence of the P-Δ effect will increase Cd2 significantly and needs to be considered in future seismic design. Three other hysteretic models: the modified-Clough (MC), shear-slipped (SSP) and bilinear elastic (BIL) models, were analyzed to check the effect of the hysteretic model on Cd2 spectra The results were compared to those of the EPP model and it was found that the Cd2 of the EPP model is the smallest among the four hysteretic models.

Journal

Advances in Structural Engineering – SAGE

Published: Feb 1, 2010

There are no references for this article.