Question

What type of stresses are artificially induced by prestressed concrete in a structure before it is loaded?

• A. Tensile
• B. Compressive
• C. Shear
• D. Torsional

Hint:

Purpose of prestressing: \[ \boxed{ \text{Introduce compressive stress to counteract tensile stress due to external loading.} } \]

Answer 1

The Correct Option is B

Step 1: Recall the concept of prestressing. Prestressing introduces internal stresses in concrete before external loads are applied.

Step 2: Identify the induced stress. The induced stresses are compressive so that the tensile stresses caused by service loads are reduced or eliminated. Thus, \[ \boxed{\text{Compressive stresses}} \] are introduced. Hence, \[ \boxed{(B)} \] is the correct answer.