City Research Online

Abstract

In this paper, experimental and numerical studies were carried out to investigate the performance of recycled aggregate concrete (RA C) filled square steel tubular m embers under lateral impact loading. A total of eleven specimens, including eight RAC filled steel tubular (RACFST) specimens and three normal concrete filled steel tubular (CFST) counterparts, were tested using drop-weight impact test rigs with fixed boundary conditions at both ends. T he parameters studied were: recycled coarse aggregate (RA) replacemen t ratio, axial compressive load ratio and height of the drop-weight. The failure mode and local damages of the specimens were extens ively investigated. The experimental results show that square RACFST specimens have the almost equivalent lateral impact resistance as normal CFST counter parts. Failure mode of steel tube is commonly indentation at the impacted area and buckling at the compression side of the secti on near the mid-span and the supports. Cracking under tension as well as crushed under compression of core concrete are observed at the mid-span and the location near the supports. A finite element analysis (FEA) model was also developed for simulating the performance of square RACFST members under lateral impact loading, and the predicted responses using the FEA model were in good agreement with the experimental results.

Publication Type:	Article
Additional Information:	© 2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords:	Recycled aggregate concrete filled steel tube (RACFST), Square section, Lateral impact loading, Time history response, Impact load, Finite element analysis (FEA)
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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