Composite Sections

Question 1

How are nelson (shear) studs attached to beam flanges?

Answer 1

spot welded

Question 2

In composite steel construction, what stress is transmitted by a shear stud?

Answer 2

Shear stress

Question 3

What is an advantage of using composite construction?

Answer 3

Smaller steel sections
Strength increase
Reduced deflection
Longer spans (better for long spans)
Smaller overall floor depth (reduced floor to floor height)
Reduced overall dead load of the system

Question 4

In composite construction, can the effective width of the concrete slab (flange) ever be larger than the on-center spacing of the steel sections?

Answer 4

No

Question 5

For composite sections, why is the concrete in tension neglected?

Answer 5

concrete is extremely weak in tension, and cracks

Question 6

What is the term for the steel connectors welded along the top flange of a beam to mechanically connect the steel section to the concrete slab above?

Answer 6

A shear stud, or Nelson stud

Question 7

In a composite section is it possible for the steel beam to be placed in both tension and compression at the same time?

Answer 7

Yes, when the N.A. falls in the area of the steel section.

Question 8

In a composite section is it possible for the steel beam to be placed in completely in tension?

Answer 8

Yes, when the N.A. falls in the area of the concrete slab.

Question 9

While all beam sections using combined materials may be properly thought of as composite sections, to what does the term composite generally refer?

Answer 9

A concrete slab acting integrally with a steel beam

Question 10

What is meant by a non-composite beam-slab section?

Answer 10

The steel beam must carry the entire load without any benefit of the concrete slab.

Question 11

How is the effective width of the concrete slab chosen based on the three given criteria?

Answer 11

Choose the least distance.

Question 12

What approach did we use in class to analyze the composite sections? ASD or LRFD

Answer 12

LRFD