【摘要】 为研究某大悬挑钢结构平台在人致激励下的结构振动舒适度，采用SAP2000对其进行有限元分析，并针对大悬挑平台楼盖在人群激励下的加速度响应超过舒适度限值的问题提出减振方案。结果表明，楼盖的端部中点为最不利振动点；当人致振动频率与楼盖竖向自振频率呈整数倍关系时，楼盖加速度响应最大；采取布置调谐质量阻尼器(tuned mass damper, TMD)的方案减振效果最为显著，且布置位置和数量对减振效果有较大影响；最不利振动点位置是影响TMD的最佳布置位置的主要因素。本工程综合减振效果与经济性，确定TMD最佳布置方案，类似工程可根据实际情况酌情决定。更多还原

【Abstract】 To study the structural vibration comfort of a large cantilever steel structure platform under human-induced excitation, SAP2000 was used for finite element analysis, and a vibration reduction scheme was proposed for the issue of the acceleration response of the large cantilever platform floor exceeding the comfort limit under crowd excitation. The results show that the midpoint of the end of floor is the most unfavorable vibration point; when the human-induced vibration frequency is an integer multiple of the vertical natural frequency of the floor, the floor’s acceleration response reaches its maximum; the scheme of deploying tuned mass dampers(TMDs) achieves the most significant vibration reduction effect, and the placement and quantity have a significant impact on the vibration reduction effect; the location of the most unfavorable vibration point is the main factor affecting the optimal placement of TMDs. The optimal arrangement scheme of the tuned mass damper(TMD) has been determined by comprehensively considering the vibration reduction effect and economic efficiency, and similar projects can be decided according to actual conditions.更多还原