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A global retrofit strategy is one that

  • A.repairs cracks and surface damage without changing the strength of any member
  • B.replaces the finishes and services of the building while leaving the frame untouched
  • C.alters the response of the whole building
  • D.strengthens one individual member at a time without regard to the rest of the frame

Answer: C

Adding shear walls or bracing, isolating the base or installing dampers all change the periods, the force distribution and the drift of the entire structure. Local measures raise the capacity of particular members without altering how the building responds.

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