针对高层结构在水平及竖向(双向)地震共同作用下的振动控制问题,基于隔震和调谐质量阻尼器振动控制原理,文章研究单一组合调谐质量阻尼器(single combined tuned mass damper,SC-TMD)体系、多重组合调谐质量阻尼器(multiple combined tuned mass damper,MC-TMD)体系、隔震体系、SC-TMD与隔震混合体系、MC-TMD与隔震混合体系5种控制策略在双向地震作用下结构的振动控制效果,选取20层钢结构Benchmark模型,采用ANSYS软件建立各体系的有限元模型,分析对比结构在双向地震作用下水平和竖向的振动响应.结果表明:MC-TMD体系、SC-TMD体系及SC-TMD与隔震混合体系对水平振动的控制效果更优;隔震体系抑制水平响应明显但会放大竖向加速度;MC-TMD与隔震混合体系对2个方向的结构振动响应均有良好的抑制效果.
Research on vibration control strategy of high-rise structures under joint action of horizontal and vertical earthquakes
Aiming at the vibration control problem of high-rise structures under the joint action of horizontal and vertical(bidirectional)earthquakes,based on the vibration control principle of seismic isolation and tuned mass damper(TMD),the structural vibration control effect of five control strategies of the single combined tuned mass damper(SC-TMD)system,multiple combined tuned mass damper(MC-TMD)system,seismic i-solation system,hybrid system of SC-TMD and seismic isolation,and hybrid system of MC-TMD and seismic isolation under the action of bidirectional earthquake was studied.Based on the Benchmark 20-story steel structure model,the finite element model of each system was established by ANSYS software,and the vibra-tion response of the structure in both horizontal and vertical directions under the action of bidirectional earth-quake was analyzed.The results show that the MC-TMD system,SC-TMD system,and hybrid system of SC-TMD and seismic isolation have better control effect on horizontal vibration.The horizontal response of the isolation system is obvious,but it will lead to the increase of vertical acceleration.The hybrid system of MC-TMD and seismic isolation has good suppression effect on the vibration response of the structure in both directions.
vibration controlbidirectional earthquakescombined tuned mass dampersmultiple dampers
万方数据
维普
