Discussion
Lateral ties in RC columns are provided to resist :
Answer: D
Lateral ties are provided to resist buckling of longitudinal steel bars.
The longitudinal bars of a column are slender and heavily compressed. Without restraint they would bow outward and burst the concrete cover. Lateral ties hold each bar in position at close intervals, preventing this buckling, and they also confine the core concrete.
Columns are designed mainly for axial load with some moment, which the longitudinal steel and concrete resist. Shear in ordinary columns is small, and ties are not sized for bending or shear, so the other options are wrong.
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