Experimental and numerical investigation on the reinforced concrete boundary beam-wall system subjected to axial compression.

PLoS One

Housing Construction Method Development Team, DL E&C, Ltd., Seoul, Republic of Korea.

Published: April 2024

This paper proposes a reinforced concrete (RC) boundary beam-wall system that requires less construction material and a smaller floor height compared to the conventional RC transfer girder system. The structural performance of this system subjected to axial compression was evaluated by performing a structural test on four specimens of 1/2 scale. In addition, three-dimensional nonlinear finite element analysis was also performed to verify the effectiveness of the boundary beam-wall system. Three test parameters such as the lower wall length-to-upper wall length ratio, lower wall thickness, and stirrup details of the lower wall were considered. The load-displacement curve was plotted for each specimen and its failure mode was identified. The test results showed that decrease in the lower wall length-to-upper wall length ratio significantly reduced the peak strength of the boundary beam-wall system and difference in upper and lower wall thicknesses resulted in lateral bending caused by eccentricity in the out-of-plane direction. Additionally, incorporating cross-ties and reducing stirrup spacing in the lower wall significantly improved initial stiffness and peak strength, effectively minimizing stress concentration.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11023235PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0301622PLOS

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