PSAD Civil Engineering Licensure Examination (CELE) Practice Test

In the steel ratio expressions, what does β1 represent?

A factor accounting for the effect of concrete strength on reinforcement ratio The yield strength of steel A factor for ductility A geometric ratio of concrete cover

Correct Answer:

A factor accounting for the effect of concrete strength on reinforcement ratio

Explanation:

β1 is the factor that defines the depth of the equivalent rectangular compression stress block used in concrete in flexural design. It captures how the strength of concrete (fc') influences the distribution of compressive stress and, by changing the block depth, affects the neutral axis location and the lever arm, which in turn influences how much reinforcement is needed to reach the target moment capacity. It varies with fc', typically decreasing as fc' increases, and is not a property of the steel itself, such as yield strength or ductility, nor a geometric ratio of concrete cover. In this sense, it embodies the influence of concrete strength on the reinforcement ratio.

Access more questions from this quiz

Continue to PSAD Civil Engineering Licensure Examination (CELE) Practice Test for more practice questions and the full quiz experience.

Access More Questions