Question

What should be the effective slenderness ratio of the laced column in order to account for the shear deformation effects?
1. 1.20 times the ideal maximum slenderness ratio
2. 1.05 times the actual maximum slenderness ratio
3. 1.25 times the ideal nominal slenderness ratio
4. 1.15 times the actual nominal slenderness ratio

Answer 1

Correct Answer - Option 2 : 1.05 times the actual maximum slenderness ratio

Explanation:

The effective slenderness ratio of a battened column is increased by 10 % and the effective slenderness ratio of a laced column is increased by 5 %.

Note:

The increase in the effective slenderness ratio of battened columns is two times the increase in the effective slenderness ratio of laced columns.

• As per IS 800: 2007, the effective slenderness ratio of battened columns, shall be taken as 1.1 times the (KL/r), the maximum actual slenderness ratio of the column, to account for shear deformation effects.
• As per CI. 7.6.1.5 of IS 800:2007 states that the effective slenderness ratio of laced columns should be 5 % more than the actual maximum slenderness ratio so that shear deformation effects are accounted for.