Time-Dependent Buckling Testing of Eccentrically Loaded Slender High-Strength Concrete Panels

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Title: Time-Dependent Buckling Testing of Eccentrically Loaded Slender High-Strength Concrete Panels

Author(s): Yue Huang, Ehab Hamed, Zhen-Tian Chang, and Stephen J. Foster

Publication: Structural Journal

Volume: 115

Issue: 01

Appears on pages(s): 41-51

Keywords: buckling; cracking; creep; high-strength concrete; panels

Date: 1/1/2018

Abstract:
The results of nine full-scale high-strength concrete panels tested under eccentric sustained loads are presented in this paper. The panels were uniaxially loaded for up to 4 months. Four panels failed due to creep buckling at different times under sustained loads that are lower than their short-term capacities. The other panels exhibited a long-term stable behavior; they were then loaded to failure without the release of the existing sustained loads and exhibited a reduction in their residual strength due to creep. The study investigates the influences of aging of concrete, magnitude of the applied load, and the slenderness ratio. The experimental results are compared to theoretical predictions generated from a theoretical analysis that was previously developed by the authors. The formulation is based on the rheological generalized Maxwell model and it accounts for large deformation kinematics in the structural level. A close correlation is achieved between the experimental and theoretical results.