Week 4:Concrete-Filled HSS

Question 1

List 3 properties of HSS that make them a more sustainable construction material?

Answer 1

1 They are lighter than other steel alternatives
2 They reduce the size of foundations required
3 Concrete filled options provide inherent fire protection

Question 2

What curve is used to design composite sections in Eurocode 4 out of 5 possible curves a to e?

Answer 2

Curve A (which also doubles as the curve for designing hot formed HSS

Question 3

Which curve is used to design composite columns according to CSA S16-14?

Answer 3

Curve in between the Class C curve beneath and the Class H curve above

Question 4

What is n for composite columns according to Canadian standards?

Answer 4

n=1.80 ie average of 1.34 and 2.24

Question 5

Is the confinement effect applicable to RHS?

Answer 5

No

Question 6

What 2 forces are dealt with when eccentricity is introduced into a column?

Answer 6

Axial force and moment

Question 7

Do longer (taller) columns >12 mm benefit from the use of concrete-filled HSS?

Answer 7

No

Question 8

When do you require shear studs in concrete filled HSS?

Answer 8

In very large CHS

Question 9

2 reasons why shear studs required in composite members?

Answer 9

1 To prevent slip

2 to ensure the member acts as one unit

Question 10

What kind of concrete is essential in concrete filled HSS?

Answer 10

Non-shrink concrete

Question 11

Why are vent holes introduces in concrete filled HSS?

Answer 11

To prevent an explosion from steam from heated concrete causing