QUIZ ULS - MOMENT RESISTANCE

What is the primary focus of the Ultimate Limit State (ULS) design?

• To maximize the use of materials

• To minimize construction costs

• To ensure aesthetic appeal

• To ensure sufficient moment and shear capacity

What is the partial factor of safety on loads and materials in prestressed concrete design?

• 1.0

• 0.8

• 0.9

• 1.5

What is the ultimate moment resistance of a prestressed beam calculated based on?

• Both compressive and tensile forces

• The area of the beam

• The tensile force in steel

• The compressive force in concrete

What is the typical ultimate strain for concrete class ≤ C50/60?

• 0.0040

• 0.0035

• 0.0030

• 0.0025

What happens to a prestressing steel when loads increase above working values?

• It behaves as conventional reinforcement

• It becomes ineffective

• It remains unchanged

• It loses its strength

What is the behavior of steel in tension and compression?

• It only behaves in compression

• It only behaves in tension

• It behaves linearly in elastic range

• It behaves differently

What is the significance of the depth of the neutral axis (NA) in ULS?

• It affects the moment resistance

• It determines the aesthetic of the structure

• It is only relevant in SLS

• It has no significance

What is the maximum depth of the neutral axis limited to in ULS for concrete ≤ C50/60?

• 0.4d

• 0.6d

• 0.45d

• 0.5d

What is the purpose of additional reinforcement in prestressed concrete?

• To simplify construction

• To improve aesthetics

• To increase the ultimate moment of resistance

• To reduce costs

What is the stress-strain relationship for concrete characterized by?

• Constant relationship

• Exponential relationship

• Parabolic relationship

• Linear relationship