Pushover Analysis of Shear-Critical Frames: Verification and Application

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Title: Pushover Analysis of Shear-Critical Frames: Verification and Application

Author(s): Serhan Guner and Frank J. Vecchio

Publication: Structural Journal

Volume: 107

Issue: 1

Appears on pages(s): 72-81

Keywords: frame; modeling; monotonic; nonlinear analysis; pushover; reinforced concrete; sectional; shear; simulation.

Date: 1/1/2010

Abstract:
An analytical procedure was recently developed for the nonlinear analysis of reinforced concrete frame structures consisting of beams, columns, and shear walls under monotonic and pushover loading. The advantage of the procedure lies in its inherent and accurate consideration of shear effects and significant secondorder mechanisms within a simple modeling process suitable for use in practice. Herein, the application of the procedure to 33 previously tested specimens, two-thirds of which were shear-critical, is presented to verify the algorithms developed. Important considerations in nonlinear modeling are also discussed to provide guidelines for general modeling applications. The procedure is found to simulate the experimental behaviors of the specimens examined with a high level of accuracy. Experimental strengths, stiffnesses, ductilities, and failure modes were all calculated accurately. Computed parameters such as crack widths, reinforcement strains, and member deformations were also represented successfully. The procedure exhibits excellent convergence and numerical stability, requiring little computational time.