3. Basic Concept of Pre-stressing

Try these first

1. 1.

   What is pre-stressing?

   Hint

   Think about how we can reinforce concrete to handle more weight.

2. 2.

   What is the unit of measurement for stress often mentioned?

   Hint

   It's a metric unit for pressure.

3. 3.

   What is the primary purpose of pre-stressing concrete?

   • To improve aesthetics
   • To enhance load-bearing capacity
   • To reduce costs

   Hint

   Think about what happens when you add tension.

4. 4.

   True or False: Pre-tensioning happens after the concrete is cast.

   • True
   • False

   Hint

   Remember the sequence of stressing methods.

5. 5.

   Design a pre-stressed concrete beam for a bridge, considering the necessary stresses and loads expected. What factors will you consider?

   Hint

   Think about transport, placement, and long-term durability.

6. 6.

   Evaluate how the pre-stressing of a concrete pile might influence its application in seismic zones. What advantages could this provide?

   Hint

   Connect pre-stressing to resistance in stressful conditions.