某大跨悬挑楼盖结构人行舒适度分析与振动控制

Pedestrian comfort analysis and vibration control for a long-span overhanging structure

结合国内外规范及相关研究成果,采用动力弹性时程分析方法对某大跨悬挑结构实际工程项目进行了人行舒适度分析与振动控制设计。结果表明：对于大跨悬挑结构,在结构强度与变形满足要求的情况下,楼盖舒适度也可能不满足要求;当其自振频率降低到与人群荷载频率接近时,舒适度问题较为明显;通过调谐质量阻尼器等减振措施可以有效地降低楼盖在人群荷载激励下的竖向振动,从而使楼盖满足舒适度使用要求。

Based on the domestic and foreign regulations and research findings,the pedestrian comfort analysis and vibration control design of a practical long-span overhanging structure have been done by using the elastic time history analysis method.The result verifies that even if the bearing capacity and deformation capacity meet the design requirement for long-span overhanging,the pedestrian comfort problem is probably insatiable.When the natural frequency is close to the frequency of the crowd load,the comfort problem is more serious.Using tuned mass damper for vibration control design can reduce the effect of vertical vibration excited by the crowd effectively,so that the pedestrian comfort can meet the design requirements.