1. Week 2 Experimentation
TS Term 2

2. What are we testing? Diagrams?
Relationship of column to the ground types:
Hinged
Pinned
Rotating
Fixed and pinned
Different length and width
Different sections
Diagrams?

3. 1. Columns and their relationship to the ground
Relationship type
Amount of buckling
(cm)
Half a bottle
Full bottle
1. hinged on bottom, free on top
.5cm
1cm
2. hinged on bottom and hinged on top
.2cm
.8cm
3. rotating on top, hinged on bottom
.7cm
1.2cm
4. hinged on bottom, pinned on top
1.5cm
3cm
5. pinned to fixed surface on top, hinged on bottom
6. pinned to fixed surfaces on top and bottom
3.5cm
4cm

4. Hinged on bottom, free on top
Diagram of connection
Half bottle: .5cm
full bottle: 1cm

5. Hinged on bottom and hinged on top
Half bottle: .2cm
full bottle: .8cm
Diagram

6. Rotating on top, hinged on bottom
Half bottle: .7cm
full bottle: 1.2cm
Diagram

7. Hinged on bottom, pinned on top
Half bottle: 1.5cm
Full bottle: 3cm
Diagram

8. Pinned to fixed surface on top, hinged on bottom
Half bottle: .5cm
full bottle: .8cm
Diagram

9. Pinned to fixed surfaces on top and bottom
Diagram
Half bottle: 3.5cm
full bottle: 4cm

10. 2. Different length and width
1) 1*1*30cm
Original size, hinged bottom with free on top.
The largest deflection.
2) 1*1*15cm
Half in height.
Deflected only slightly (1mm) with the same load.
3) 2*2*30cm
Double dimension with original height.
Barely deflected.
4) 1*2*30cm
One dimension is doubled.
Deflects towards the plane with the longer dimension.

11. 3. Different sections with same area size (1cm2)
1) Original square section. Hinged bottom with free on top.
2) Square frame section.
Stiffer than square section.
3) I section.
It was also stiff and did not bend like normal square section.