7/29/2019 RC exam

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POLYTECHNIC UNIVERSITY OF THE PHILIPPINESCOLLEGE OF ENGINEERING

DEPARTMENT OF CIVIL ENGINEERING

FLOOR PLAN

GIVEN:

Slab 1 & Slab 2: SDL = 0.5 kPa Slab 3: SDL = 0.5 kPa

LL = 2 kPa LL = 3 kPa

Thickness of concrete slab = 4 Thickness of concrete slab = 4

Toppings = 2 Toppings = 2

Unit Weight of Concrete = 24 kN/m3

Unit Weight of Concrete = 24 kN/m3

Unit Weight of Masonry = 23.56 kN/m3

Unit Weight of Masonry = 23.56 kN/m3

A

1

DCB

2

5.5 m 4.5 m 3.5 m

2.5 m Slab 1 Slab 2 Slab 3

B1 B2 CB1

B3

B7

B4

CB1

B5 B6

B8

7/29/2019 RC exam

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POLYTECHNIC UNIVERSITY OF THE PHILIPPINESCOLLEGE OF ENGINEERING

DEPARTMENT OF CIVIL ENGINEERING

Name: ______________________________________________________________ Score: _______________________

Email Add: ________________________________________________________ Student Number: ______________

Contact Number: ______________________________________________________ Signature: ____________________

TEST I: Identification

Direction: Identify the following question. Write your answer after each corresponding problem. Observe proper units as well as number of significant

numbers. Box your final answer.

1. Is a quantity which measures the resistance of mass to being revolved about a line?2. How long after mixing will concrete cannot be transferred from one form to another?3. The single most important factor which determines the strength of a concrete mix is the:4. Which property of reinforced concrete building frame is most important for resisting an earthquake shocks?5. A cantilever beam is loaded by a couple of 100 N.m at a point midway between the support and the free end. The shearing force at any point

along the bar is given by:

6. A method of analyzing continuous beams or frames attributed to Proof. Hardy Cross.7. What is PD 1096 about?8. One in which both the concrete and the steel are so proportional as to work to their full working stresses when the member carries its full

allowable load.

9. Is the ratio of moment of inertia of the cross-section to its length? (as used in analysis of in determinate structures)10.How do you avoid honeycombs in concrete?

7/29/2019 RC exam

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POLYTECHNIC UNIVERSITY OF THE PHILIPPINESCOLLEGE OF ENGINEERING

DEPARTMENT OF CIVIL ENGINEERING

TEST II: Problem Analysis

Direction: Analyse the problem and box your final answer. Make sure you have a solution of your come up answer.

1. Identify what kind of slab is Slab 3?2. What is the maximum moment induced by column C2 due to the load carried by cantilever GB2 & concentrated force produced by beam B6.3. Consider beam B4 to be restrained. What is its maximum moment?4. What is the concentrated load carried by column B2.5. What is the equivalent uniform load carried by beam B2.

Problem 6

10 refers to the following situation.

If RC beam B1 (restrained beam) is taken and need to be analyze as follows?

432mm diameter at tension bars Grade 40 (fy = 414 MPa)228mm diameter at compression bars Grade 40 (fy = 414 MPa)

b = 300 mm; over all depth = 500 mm; concrete cover both tension and compression bars = 70 mm; fc = 21 MPa

6. What is the maximum ultimate moment produced by restrained beam B1?7. What is the depth of the rectangular stress block?8. What is the safe ultimate moment can restrained beam B1 resist?9. With same base width and depth revised the beam to its economical design. What is the steel area required for tension?10. Refer to problem 9, what is the steel area required for compression?