14.1.1. Variability in Resistance

Try these first

1. 1.

   What does the term 'reserve load' refer to?

   Hint

   Think about what extra is planned in the design.

2. 2.

   Define the factor of safety in structural design.

   Hint

   Consider it a safety net for design.

3. 3.

   What does variability in resistance refer to?

   • Only material strength
   • Only dimension accuracy
   • Differences in resistance due to various factors

   Hint

   Think broadly about the influencing factors.

4. 4.

   True or False: The variability in live loads is generally less than that of dead loads.

   • True
   • False

   Hint

   Recall the definitions of live and dead loads.

5. 5.

   Critically analyze a failed concrete structure and identify how variability in resistance could have contributed to the failure. Provide a detailed account of each factor.

   Hint

   Reflect on real-life case studies to get examples of these failures.

6. 6.

   Design a safety plan for a hypothetical structure in an area with unpredictable live loads, detailing the safety factors you would implement. Justify your choices.

   Hint

   Think about higher safety factors in relation to load uncertainties and potential impacts.