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Match each limit state with what it represents.
List I
A. Serviceability
B. Ultimate
C. Damage
D. Failure
List II
1. an accepted degree of armour displacement
2. function impaired but the structure survives
3. the structure no longer performs its purpose
4. structural collapse or loss of the works

  • A.A-3, B-1, C-4, D-2
  • B.A-2, B-4, C-1, D-3
  • C.A-4, B-2, C-1, D-3
  • D.A-2, B-4, C-3, D-1

Answer: B

Rubble mound design in particular accepts a defined level of damage rather than none at all. This makes the choice of an acceptable damage level a central design decision. Repair cost and accessibility both bear on the choice.

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