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Although seismological effects on the damping modification factor of an acceleration response spectrum (DMF a ) are important, seismological parameters in existing formulations are generally not specified in seismic codes. This study aims to propose a practical DMF a  formulation using parameters available from seismic codes to reflect the seismological effects. To this end, an analytical approach is developed to explore the seismological effects on DMF a . It is found that a bandwidth factor defined as the ratio of acceleration spectral values at 6 and 0s can appropriately reflect the seismological effects, and thus is incorporated into the proposed DMF a  formulation for seismic design.

Damping Modification Factor of Acceleration Response Spectrum considering Seismological Effects