14.3.1.3 - Probability of Failure
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Practice Questions
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What does safety provisions refer to?
💡 Hint: Think about protection factors in engineering designs.
Name one factor that affects variability in resistance.
💡 Hint: Consider where and how materials are sourced and applied.
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Interactive Quizzes
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What is the primary goal of safety provisions in structural engineering?
💡 Hint: Think about what ensures buildings are secure.
True or False: A reliability index of 3.5 indicates a higher risk of failure.
💡 Hint: Recall our discussion on reliability indices.
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Challenge Problems
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Calculate the reliability index for a structural member given its load-carrying capacity and the expected load. If the load-carrying capacity is 9,000 lbs and expected loads vary but average at 8,500 lbs, can you assume it’s sufficient based on P = 1 - social concern?
💡 Hint: Think about how normal distribution defines safety in margins.
Discuss what changes would need to occur if a structure was found to have a low reliability index after completion. What steps should an engineer take?
💡 Hint: Consider all alternatives engineers utilize to enhance structural integrity.
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