Sentence 4.1.8.12.(3)

Intent 1:

To limit the probability that the acceleration time-histories used in the numerical time-history method will not be spectrum-compatible and will not take into account how site amplifications affect the response of buildings subjected to ground motions, which could lead to:

• the excessive deformation of, or excessive stress in, the structural elements, which could lead to damage to the building, or
• the excessive deformation of, or excessive stress in, the building structure, which could lead to damage to the building, which could impede the intended use and occupancy of the building.

Intent 2:

To direct Code users to Sentence 4.1.8.4.(9) for the determination of the design spectral response acceleration values, S(T), and their intermediate values.