Statement attached Statement attached All code references are to ACI 318-14. Rea

Question

Statement attached Statement attached All code references are to ACI 318-14. Read each problem CAREFULLY!! The resistance factor for elements that are compression controlled is elements that are tension controlled? 1. a) Greater than b) Less than c) Equal to d) Not enough information 2. A reinforced concrete beam that is compression controlled will have what kind of failure? a) Ductile b) Brittle c) Desirable d) Tension 3. When performing a design iteration, which of the following will increase the nominal moment capacity of a reinforced concrete beam? a) Increase the d (distance to tension steel) b) Increase Concrete Strength Both a & b None of the above c) d) 4. Per ACI 9.3, what is the minimum distance d for a simply supported beam spanning 28 ft and reinforced with steel of f-80 ksi located 3" from the bottom? 18 b) 21.6 c) 22.2 d) 25.2 podo 3" Problem 3 5. Per ACI 9.6.3, is A, required if h-9" and Vu20v? )) No b) Yes 6. The effective moment of inertia takes into account which of the following parameters? a) Gross moment of inertia b) Cracking moment c) Cracked moment of inertia d) a & b e) All of the above

Explanation / Answer

1) b - less than

2) b - Brittle

3) c - both a and b - increase the d and increase the concrete strength

4) a - 18"

5) a - No

6) e - All the above

Gross moment of inertia, cracking moment and cracked moment of inertia taken into account.

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