CVEN 444 Exam 1

We need safety factors (phi, alpha) in RC design because

all design variables are random in nature

Load combinations are used in design because there is

a low probability of all maximums occurring at the same time

The bending stresses in a reinforced concrete element before yielding can be determine

using Hooke’s Law

An under-reinforced section is one in which the tension steel reinforcement

yields before the concrete has reached its maximum usable strain

A balanced condition occurs when the tension steel yields

at the same time the concrete reaches its maximum usable strain

Compression reinforcement helps increases….

the ductility of an RC section

A minimum steel reinforcement requirement is imposed in beam design to

prevent a brittle type failure from occurring

Concrete cover is important because

it protects the reinforcement from corrosion and overheating

concrete is a material stronger in __________ than it is in ____________

compression, tension

an over-reinforced section is one in which

the steel reinforcement yields after the concrete has reached its maximum usable strain

the stress-strain behavior of concrete in compression is linear at stress levels

up to about f’c/2