Effect of Column-to-Beam Strength Ratio on Earthquake Responses of Steel Moment Frames

(Part 2; Response Characteristics of Frames Involving Column Yielding)

Abstract

This paper examined the effects of the column-to-beam strength ratio on the earthquake response of steel moment frames. A series of numerical analysis was conducted for columnto-strength ratios successively decreased from the ratio for ensuring the column-elastic response. The change in response is not abrupt but gradual with the decrease of the ratio, and quantitative information is provided for the degree of change in the maximum story drift and beam and column maximum rotations with respect to the ratio.Additional analysis was carried out to investigate the effects of column base strength, PE moment, and strain hardening.