Effect of postyield stiffness on the estimation of R factors for seismic design

Martinez-Rueda, J.E. (2008) Effect of postyield stiffness on the estimation of R factors for seismic design In: 7th European Conference on Structural Dynamics, EURODYN 2008, 7-9 Jul 2008, Southampton, UK.

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Abstract

Simplified models to estimate the seismic force reduction factor R have relied on the assumption of an elastic-perfectly plastic response of the structure. However, realistic structures exhibit a non-zero postyield stiffness that can have a significant effect on the maximum base shear the structure can experience. This paper introduces a new formula to estimate the seismic force reduction factor that accounts for the postyield stiffness of the structure. The proposed formula is based on the equal energy criterion. Comparisons between real R factors and those estimated by the proposed formula are critically discussed

Item Type:Contribution to conference proceedings in the public domain ( Full Paper)
Uncontrolled Keywords:seismic force reduction factor, equal-energy rule, postyield stiffness
Subjects:H000 Engineering > H200 Civil Engineering > H210 Structural Engineering
H000 Engineering > H200 Civil Engineering
Faculties:Faculty of Science and Engineering > School of Environment and Technology > Ground water and structural engineering
Faculty of Science and Engineering > School of Environment and Technology
ID Code:5011
Deposited By:editor environment
Deposited On:11 Mar 2010
Last Modified:25 Apr 2012 13:45

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