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深圳北站东西广场人行天桥位于深圳火车北站站房北侧。针对人行天桥大跨度桥面的振动舒适度问题,建立天桥的整体有限元模型,以IABSE建议的单人步行激励为基础,人行步频1.6～2.4Hz,考虑行人起步相位随机分布,通过多点输入时程分析方法求得结构的加速度响应,并参考ATC给出天桥的人行舒适度性能水准对该天桥进行人行走舒适度分析。分析研究表明该天桥具有适宜的人行舒适度,计算分析找到结构响应较大处,结构设计据此进行了针对性的加强,可更有效地提高其舒适度。
Shenzhen North Station East Square pedestrian bridge is located in Shenzhen North Railway Station Station North. Aiming at the vibration comfort of long-span deck of footbridge, the finite element model of flyover is established. Based on IABSE’s single-step walking stimulus, the walking frequency is 1.6-2.4Hz. Considering the random distribution of pedestrian starting phase, Enter the time history analysis method to obtain the acceleration response of the structure, and refer to the comfort performance level of the pedestrian bridge given by the ATC to analyze the walking comfort of the pedestrian bridge. The analysis and research shows that the flyover has appropriate pedestrian comfort, and the structural response of the flyover is larger after calculation and analysis. The structural design is targeted to be strengthened accordingly, and the comfort of the flyover can be more effectively improved.