【摘要】 当钢结构登机桥跨度较大时,其竖向自振频率接近人行走或者跑动的频率,容易发生共振。此时,竖向加速度将超过人体舒适度极限,给登机者心理上造成恐慌。采用调谐质量阻尼器(TMD)来达到减少登机桥的竖向振动反应是一个很好的办法。本文结合一座40m跨铜结构登机桥实例,采用sAp2000有限元软件进行人行荷载下不同频率比、质量比、阻尼比TMD的动力分析,得到不同参数对减振效果的影响程度,望能为今后类似工程提供参考。更多还原

【Abstract】 The vertical vibration frequency of long-span aerobridge is close to the normal pedestrian’s frequency,so the resonance is easy to happen.The vertical acceleration might exceed the limit of human comfort to cause the panic.It would be a good method to use tuned mass dampers to reduce the vertical vibration of aerobridge.Based on a 40-meter-steel aerobridge with TMD of different frequency ratio 、 mass ratio 、 damping ratio,dynamic analysis was proceeded using software SAP2000,effect of different parameters was obtained,which would give some reference for similar project.更多还原