List of top Structures Questions on Structural Analysis

A simply supported Aluminium column of length 1 m and rectangular cross-section \( w \times t \) with \( t \leq w \), is subjected to axial compressive loading.
Young’s modulus is 70 GPa. Yield stress under uniaxial compression is 120 MPa.
The value of \( t \) at which the failure load for yielding and buckling coincide is _________ mm.

For a thin-walled I section, the width of the two flanges as well as the web height are the same, i.e., \( 2b = 20 \, \text{mm} \). Thickness is 0.6 mm.
The second moment of area about a horizontal axis passing through the centroid is _________ mm\(^4\).