Structural Behaviour Of Ultra High Strength Concrete Columns Under Biaxial Loading
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 10
Abstract
Ultra High Strength Concrete (UHSC) is characterized by extraordinary mechanical properties (high compressive and tensile strength, large E-modulus) and has excellent durability properties regarding corrosion of concrete and reinforcement. Until the peak load the behavior is predominantly linear-elastic, large deformations at peak cannot be observed, and the reached post-peak strain is nearly zero. These facts point out the very brittle material behavior. The structural behavior of UHSC columns was investigated through an experimental program comprising applying biaxial bending on large-scale specimens. The experimental program of this study includes testing of five reinforced concrete square columns. The program was designed to clarity the effect of different eccentricity ratios (e/t = 0, 0.1, 0.2,0.4 and 1.0). The test results cover the cracking behavior and mode of failure, and load-concrete strain response. The test results were analyzed and evaluated to demonstrate the effect of eccentricity ratio on the ultimate capacity of UHSC columns subjected to biaxial bending. The results displayed that increasing the eccentricity from (e/t =0) to (e/t =1.0) resulted in significant reduction in ultimate load capacity by 95%. the design provisions for slender columns subjected to biaxial bending in the Egyptian Code for Design and Construction of Reinforced Concrete Structures ECP 203-2007 were evaluated and compared to the experimental results.
Authors and Affiliations
Dr. Ghada D. Abd- Elhamid, Dr. Enas A. A. Khattab, Dr. Omnia F. H. Mahmoud
Keywords
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- EP ID EP401983
- DOI 10.9790/9622-0810024450.
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