Chapter 10 - Two-way Slabs

Question 1

What are the dimensional limits for a 2-way slab?

Answer 1

lmax/lmin < 2.

Question 2

What is x/d limited to for 2-way slabs?

Answer 2

x/d = 0.15 or 0.25.

Question 3

What does a double and single hatch mean on a slab diagram?

Answer 3

Single hatch = simply supported at edge.

Double hatch = fixed at edge.

Question 4

What is the equation for external work in a section of a 2-way slab?

Answer 4

W(external) = external load * displacement at position of load.

Question 5

What is the equation for internal work along a yield line of a 2-way slab?

Answer 5

W(internal) = moment capacity * rotation * yield line length.

Question 6

How do you relate the angle of rotation and displacement?

Answer 6

θ = δ/L

Question 7

How are positive and negative moment yield lines shown on a slab diagram?

Answer 7

Positive moment yield lines are shown using a dashed line.

Negative moment yield lines are shown using a full line.