大跨度楼盖结构在运动荷载下的振动性能

Vibration characteristic of large span floor structure under moving load

摘要:

为研究人员运动荷载下大跨度楼盖的振动特性，以内蒙古伊旗全民健身体育中心大跨度张弦梁楼盖体系为背景，采用生物力学测力平台进行人员行走、跑步、跳跃、起立等运动荷载实测和相关分析研究.考虑可能出现的各种运动荷载工况，对大跨度张弦梁楼盖区振动开展有限元分析和现场实测.分析表明：行走、跑步及跳跃荷载工况下，人员动力放大系数分别约为1.2、2.4及4.9，大跨度楼盖在人员运动荷载数值模型激励下，所得有限元分析结果与现场实测竖向加速度峰值及理论计算值吻合较好.

Abstract:

To explore vibration characteristic of large span floor structure under moving load, based on the large span beam string floor structure of the National Fitness Center in Ejin Horo Banner, Inner Mongolia, the loading measurement and analysis of walking, running, jumping and standing up were conducted by using biomechanical force measuring platform. Considering all kinds of possible load condition, the finite element analysis (FEA) and field measurement were performed for vibration of large span beam string structure floor area. The results show that the dynamic magnification factor of walking, running and jumping is 1.2, 2.4 and 4.9 respectively. The FEA results of large-span floor vertical acceleration induced by pedestrian load excitation are in good agreement with field measurement results and theoretical calculation values.