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3 cards from this section. Quick, good the night before a test.
What is the main purpose of using prestressed concrete?
Think about the advantages over traditional methods.
Name the two methods of prestressing concrete.
One involves tensioning before the concrete is set.
What is the primary purpose of prestressed concrete?
Look for benefits of construction methods.
True or False: Posttensioning occurs before the concrete is poured.
Consider the order of operations.
A simply supported beam is prestressed using a tendon that introduces a 120 ksi initial stress. After considering creep and shrinkage, what is the effective stress left in the steel if the losses amount to 20 ksi?
Identify the initial stress and subtract the specified losses.
Compare the performance of a 30 feet R/C beam with 5 inches of deflection to a P/C beam subjected to the same load. Assuming the P/C design reduces deflection by 50%. What would the new deflection of the P/C beam be?
Calculate based on the reduction percentage given.
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