A Method to Improve Distribution of Story Drift Angle Responses in CFT Moment-Resistant Frames Under Severe Earthquakes

As the performance-based design will be widely used, it will be more necessary for a frame to be evaluated by the responses obtained from a dynamic analysis. In this paper, we proposed a simple method to modify the story shear strength so as to make the story drift distribution smooth over the building height, being based on a pre-calculated story responses. The method is derived from the theory of damage concentration by Akiyama. The applicability of the method was confirmed by a numerical calculation of a full nonlinear frame analysis.