Week 9 Challenge

1.

To design a 3 hinged pitched roof frame of a steel building.

Given: Assume no wind load acting on the walls and roof. Analyse the frame structure and draw bending moment, shear force and axial force diagrams of the frame. The slope of the roof is 1 in 10 and the roof is accessible for maintenance purpose (assume 75 kg/m2) only. Dead load on the roof are given below. Assume bay spacing as 5 m and frame width is 20m. (Design code as per AISC:ASD. No seismic load consideration required)

Weight of roofing sheet — 5kg/m2

Weight of purlins + tertiary members = 25 kg/m2

Let us assume the height of column = 5 m.

2.To draw a Bending moment diagram for the given cases.

3.

To determine the followings:

1. Determine the lateral deflection at point A & Vertical deflection at mid section of beam between B & C from Figure I in previous challenge.

2. Determine the lateral deflection at point A & Vertical deflection at mid section of beam between A & B from Figure 2 in previous challenge.

3. Determine the lateral deflection at point A & point B from Figure 3 in previous challenge.