a) How does increasing the yield stress of the tension reinforcement affect the
ID: 1920083 • Letter: A
Question
a) How does increasing the yield stress of the tension reinforcement affect the nominal strength and ductility of a reinforced concrete beam? Why?
a) How does increasing the specified concrete strength affect the nominal strength and ductility of a reinforced concrete beam? Why?
What does over-reinforced mean? What does under-reinforced mean? Which is desirable and why?
How would your Moment-Curvature plot be affected if the amount of tension steel was doubled?
How would your Moment-Curvature plot from part a be affected if compression steel was added to the cross-section?
What is the significance of the yield moment?
Explanation / Answer
A) Increasing the yield strength of steel decreases the ductility. The strength and ductility characteristics of reinforced concrete members are strictly related
Over reinforced means steel provided is more than in balanced section and in this concrete will fail first without any sign of faliure.
Under rienforced means steel provided id less than in balanced section and in this steel will yield first
under reinforced is desirable as it will give indication of failure in the form of cracks before the structure fails ultimately
Yield moment is the moment where concrete will fail due to bending and it is of much importance in design of concrete and in prediction of failure
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