（1 浙江精工钢结构集团有限公司， 绍兴 312030; 2 上海路博减振科技股份有限公司， 上海 201401）

［摘要］采用时程分析的模拟计算方法，以竖向振动加速度峰值作为评价标准，对那曲地区藏北高原商业生态长廊建设项目钢连廊竖向振动加速度进行分析与控制。根据人群密度，考虑五种不同时程工况，对布置TMD前后的钢连廊分别进行时程分析，较为全面地揭示了钢连廊的竖向振动。分析结果表明，在1.95Hz的人群荷载激励下，钢连廊产生了非常明显的共振，跨中峰值加速度达到39.96cm/s2，会引起行人心里不适，竖向振动加速度也超出了规范限值，需要进行减振控制；布置TMD后，在人群荷载激励下，钢连廊的竖向振动加速度得到了很好的控制，峰值小于15cm/s2，减振率可达到13%～65%。

［关键词］钢连廊； 竖向振动加速度； 时程分析； TMD

中图分类号：TU318文献标识码：A文章编号：1002-848X(2021)02-0046-04

Research on time history analysis and control of vertical vibration acceleration of steel corridor

WU Guosong1, ZHANG Quanwu2

（1 Zhejiang Seiko Steel Structure Group Co., Ltd.， Shaoxing 312030， China; 2 Shanghai RB Vibration Science and Technologies Co., Ltd.， Shanghai 201401， China)

Abstract:The simulation calculation method of time-history analysis was adopted, and the vertical vibration acceleration peak value was used as the evaluation standard to analyze and control the vertical vibration acceleration of the steel corridor of the commercial ecological corridor construction project on the Northern Tibetan Plateau in Nagqu area. According to the crowd density, five different time-history conditions were considered, and the time-history analysis of the steel corridors before and after the TMD arrangement was carried out, which reveals the vertical vibration of the steel corridors more comprehensively. The analysis results show that under the excitation of the crowd load of 1.95Hz, the steel corridor has a very obvious resonance,  the peak  acceleration of mid-span reaches 39.96cm/s2, which will cause discomfort to the pedestrians.  The vertical vibration acceleration also exceeds the specification limit, and vibration reduction control is required. After the TMD is arranged, the vertical vibration acceleration of the steel corridor is well controlled under the excitation of the crowd load, the peak value is less than 15cm/s2, and the vibration reduction rate can reach 13%~65%.

Keywords:steel corridor; vertical vibration acceleration; time history analysis; TMD

作者简介：吴国松，学士，工程师，Email: 806541620@qq.com。