Story Drifts and Connection Rotations of Semi-Rigid Steel Frames

Abstract

Story Drifts and Connection Rotations of Semi-Rigid Steel Frames Story drifts, connection rotations and story drift-connection rotation relationships of 6 partial strength/semi-rigid and 2 rigid frames having 7.0m and 9.0m span lengths and four different connection capacities are investigated with nonlinear dynamic analyses. In dynamic analyses 25 real ground motion records with 2 different earthquake levels and 9 far field and 9 near field artificial records are generated by using three different attenuation relations and scaled to 2 different earthquake levels are used. As a result of the analyses, the story drift ratios and the connection rotations of the frames are determined and their performance limit controls are done and the story drift ratios of partial strength/semi rigid frames and rigid frames are compared. Finally, the story drift-connection rotation relationships are investigated and the effect of connection capacity, connection hysteresis model and the distance from the fault are searched.