TST1501 Theory of Structures Assessment 1 Brief - 2025

TST1501 QUESTION 1

The cross section of a short-reinforced beam is shown in Figure 1. Calculate:

1.1.The stress in the concrete and the stress in the steel if an axial load of 500 kN is applied to the column.
1.2.The force exerted on each material.
1.3.The change in length of the column, if it is 1.5 m long.

Assume that the bond between the steel and the concrete is sufficient to prevent slip. 

TST1501 QUESTION 2

The cross section of a hollow core concrete plank is as shown in Figure 2.

Compute the following sectional properties of the cross section with respect to X-X and Y-Y: 
2.1 The position of the centroid of the section
2.2 The second moment of area about the horizontal axis and vertical axis (l)a and In). 
2.3 The radius of gyration. rx and r1
2.4 The elastic section modulus to the horizontal, Zey,