转动地震动对隔震结构动力响应的影响分析

韩淼,王延森,杜红凯,孙猛,刘永波

振动与冲击 ›› 2022, Vol. 41 ›› Issue (10) : 133-139.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (10) : 133-139.
论文

转动地震动对隔震结构动力响应的影响分析

  • 韩淼,王延森,杜红凯,孙猛,刘永波
作者信息 +

Influence of rotational ground motions on the dynamic responses of isolated structures

  • HAN Miao,WANG Yansen,DU Hongkai,SUN Meng,LIU Yongbo
Author information +
文章历史 +

摘要

地震动转动分量对隔震结构动力响应影响的认识还存在不足。建立钢筋混凝土框架抗震和隔震结构模型,对地震动平动分量和转动分量单独及耦合作用下的结构动力响应进行分析,结果表明转动分量与平动分量耦合作用相比于平动分量单独作用,隔震结构y向最大楼层加速度响应的增幅可达100%以上,最大层间位移响应的增幅可达25%,x向最大角柱剪力响应的增幅可达18%,楼层扭转角响应主要由转动分量贡献,结构中下部的增幅可达10倍以上。含有速度脉冲地震动作用的隔震结构动力响应,相比无速度脉冲地震动作用,明显增大。隔震对转动分量作用的结构响应减震效果,比对平动分量作用的差;含有速度脉冲地震动作用的结构响应减震效果,比对无速度脉冲地震动的差。

Abstract

The understanding of the influence of rotational component of ground motion on the dynamic response of isolated structures is insufficient. The seismic and isolation structure model of reinforced concrete frame is established. The dynamic response of the structure under the action of translational and rotational components of ground motion alone and coupled is analyzed. The coupling effect of rotational and translational components is compared with that of translational components acting alone. The increase in the y-directional maximum floor acceleration response of the seismic isolation structure can be more than 100%., the maximum interfloor displacement can increase by 25%, and the maximum angle column shear can increase by 18% in x-direction. The floor torsion angle is mainly contributed by rotational component, and the increase of the middle and lower part of the structure is more than 10 times. The dynamic response of isolated structures under the action of velocity pulse is significantly increased compared with that without velocity pulse. The effect of seismic isolation on the response of rotating component is worse than that of translational component. The damping effect of the structure under the action of the velocity pulse is worse than that without the velocity pulse.

关键词

隔震结构 / 转动分量 / 动力响应 / 耦合作用 / 减震效果

Key words

Isolation structure / Rotational component / Dynamic response / Coupling effect / Damping effect

引用本文

导出引用
韩淼,王延森,杜红凯,孙猛,刘永波. 转动地震动对隔震结构动力响应的影响分析[J]. 振动与冲击, 2022, 41(10): 133-139
HAN Miao,WANG Yansen,DU Hongkai,SUN Meng,LIU Yongbo. Influence of rotational ground motions on the dynamic responses of isolated structures[J]. Journal of Vibration and Shock, 2022, 41(10): 133-139

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