Study on the Dynamic Behavior of Semi-Rigid Frames
The dynamic behavior of semi-rigid concrete filled steel tube frames is different from that of their rigid counterparts. ANSYS was employed to model ten-story concrete filled steel tube frames with three different connection types（ rigid, semi-rigid and flexible）. Natural period, inter-story drifts and total drifts of the frames subjected to design response spectra excitation were analyzed. Time-history analyses when the frames subjected to two different earthquakes were studied. It seems that connection flexibility noticeably increases the natural periods of the lower modes, however, its effect on higher modes is negligible. The use of rigid frames may not be the best option in seismic region. The seismic design suggestions of the frames were proposed.
Yong Huang, Tai Bao and Hong Wang
X. L. Sun "Study on the Dynamic Behavior of Semi-Rigid Frames", Advanced Materials Research, Vols. 671-674, pp. 864-867, 2013