Analysis of the impact of rotational components from near-fault earthquakes with and without pulses on the seismic response of steel frame structures with different height-width ratios
Analysis of the impact of rotational components from near-fault earthquakes with and without pulses on the seismic response of steel frame structures with different height-width ratios
Three steel frame structure models with different height-width ratios were established,and five near-fault ground motions with and without velocity pulses were selected.The rocking component and torsional component were synthesized by frequency-domain method,and the response of the structure was analyzed considering the input of translational ground motion,translational coupled rocking motion and translational coupled torsional motion.The results show that:(1)Compared with the independent action of the translational component,both the translational coupled rocking motion and translational coupled torsional motion increase the structural response;The increase rate under pulsed ground motion is higher than that without pulsed ground motion.(2)The translational coupled with torsional component has the greatest effect on the response of the corner column,followed by the side column and the middle column.(3)With the increase of the height-width ratio of the structure,the increase of the middle column response of the translational component coupled with the rocking component is greater than that of the translational component coupled with the torsional component.
关键词
摇摆分量/扭转分量/速度脉冲/高宽比
Key words
rocking component/torsion component/velocity pulse/aspect ratio
维普
万方数据