4.8. Modeling Creep and Shrinkage in Design

Try these first

1. 1.

   Define creep in the context of concrete.

   Hint

   What happens to concrete over time under a constant load?

2. 2.

   What does the creep coefficient represent?

   Hint

   Think about how we calculate strain under long-term load.

3. 3.

   What is the definition of creep in concrete?

   • Immediate deformation
   • Time-dependent increase in strain
   • Volume change due to moisture loss

   Hint

   Think about how strain develops over time.

4. 4.

   True or False: The total strain equation includes only immediate elastic strain.

   • True
   • False

   Hint

   What does the total strain equation include?

5. 5.

   Given a concrete beam subject to a known load, use the total strain equation to determine the expected total strain after one year. Assume values for each strain type.

   Hint

   What baseline values can you consider for elastic strain and creep?

6. 6.

   Discuss how differing environmental conditions may affect creep in a precast versus cast-in-situ structure. Provide examples.

   Hint

   Think about the differences in exposure these structures face.