速度脉冲地震下偏心重力柱-核心筒结构的 弹塑性地震响应分析

研究了结构偏心和速度脉冲强震双重不利因素对新型重力柱-核心筒结构体系地震响应的影响。选取3条速度脉冲和对应的3条非速度脉冲地震记录作为地震动输入，采用CANNY软件对偏心重力柱-核心筒结构进行了非线性动力时程分析，研究速度脉冲效应和偏心率对弹塑性地震响应的影响规律。研究结果表明，速度脉冲地震下的结构层间剪力、层间位移、层间扭矩和层间扭转角均明显高于非速度脉冲地震下的对应值。偏心率对结构弹塑性抗震需求影响显著。顶点位移、层间位移角、层间扭矩和层间扭转角随着偏心率的增大而增大，层间剪力则呈现出减小的趋势。因此，在新型重力柱-核心筒结构设计中，应考虑速度脉冲地震和偏心率的影响。

An Elastoplastic Seismic Response Analysis of Eccentric Gravity Column-Core Tube Structure Under Velocity Pulse Earthquake

A research has been carried out on the influence of structural eccentricity and velocity pulse earthquake on the seismic response of the new gravity column-core tube structure. With three velocity pulses along with three corresponding non-velocity pulse seismic records selected as the ground motion input, and by using CANNY software, a nonlinear dynamic time history analysis of eccentric gravity column core tube structure has been made to study the influence of velocity pulse effect and eccentricity on elastic-plastic seismic response. The results show that the inter-story shear force, inter-story displacement, inter-story torque and inter-story torsion angle of the structure are greatly higher than those under velocity pulse earthquake, with the eccentricity exerting great effect on the elasto-plastic seismic criteria of the structure. Specifically, the vertex displacement, inter-story displacement angle, inter-story torque and inter-story torsion angle increase positively with the increase of eccentricity, while the inter-story shear shows a decreasing trend. Therefore, it is suggested that the effects of velocity pulse earthquake and eccentricity should be taken into consideration in the design of new gravity column core tube structure.