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Understanding Lateral Ties in RC Columns
Lateral ties, also known as transverse reinforcement, play a crucial role in reinforced concrete (RC) columns. Their primary function is to enhance the structural integrity and stability of the column.
Key Functions of Lateral Ties:
- Resistance to Buckling:
Lateral ties are primarily designed to prevent the buckling of longitudinal steel bars under compressive loads. Buckling is a failure mode that can occur when the slenderness ratio of the column is high. The ties provide lateral support, ensuring that the longitudinal bars remain straight and adequately restrained.
- Maintaining Bar Position:
They help maintain the correct spacing and alignment of the longitudinal reinforcement during the concrete pouring process. This ensures that the concrete can effectively bond with the steel, maximizing the strength of the column.
- Shear Resistance:
Although shear resistance is generally provided by stirrups in beams, lateral ties can also contribute to resisting shear forces in columns. However, their primary role is not to resist shear but to facilitate the effective functioning of the longitudinal reinforcement.
Conclusion:
In summary, while lateral ties can have a minor role in shear resistance, their main purpose is to prevent the buckling of longitudinal steel bars. Therefore, the correct answer to the question regarding the function of lateral ties in RC columns is option 'C'—to resist buckling of longitudinal steel bars. This understanding is essential for designing safe and effective RC structures.