Study on bending properties of double-limb C-type light steel partially encased fiber reinforced self-compacting lightweight aggregate concrete composite columns (major axis)
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NETL
NSTL
Elsevier
To investigate the mechanical properties of the double-limb C-type light steel partially wrapped fiber reinforced self-compacting lightweight aggregate concrete (FSLC) composite columns under major-axial bending, eight specimens were designed for monotonic loading tests under eccentric compression. Three varying parameters of relative eccentricity, FSLC strength grade, and batten plate spacing were considered. In the experiments, the failure process and morphology of such a new type of composite column were observed, and important data including stress distribution, deformation, ultimate bearing capacity, and load-deformation curves were obtained. Moreover, the influence of relative eccentricity, FSLC strength grade, and batten plate spacing on the ultimate bearing capacity of the specimens was analyzed. The research results showed that the bending failure process and morphology of the double-limb C-type light steel partially wrapped FSLC composite column were similar to those of partially encased steel-concrete (PEC) columns. Depending on the eccentricity, two forms of failure, including large-eccentric loading failure and small-eccentric loading failure, were exhibited. The ultimate bearing capacity of the specimens decreased with the increase of the relative eccentricity, while increasing the FSLC strength grade and decreasing the batten plate spacing can effectively improve the bearing capacity of the specimens. Based on the modified plane section assumption, the formula for calculating the positive sectional ultimate bearing capacity of the section steel double-limb C-type light steel partially wrapped FSLC bending column was derived, and the calculated value was in good agreement with the experimental value.
NETL
NSTL
Elsevier
