吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (11): 2644-2652.doi: 10.13229/j.cnki.jdxbgxb20210393
• 交通运输工程·土木工程 • 上一篇
张彦玲1,2(),王灿1,2,张旭1,2,王昂洋3,李运生1,2()
Yan-ling ZHANG1,2(),Can WANG1,2,Xu ZHANG1,2,Ang-yang WANG3,Yun-sheng LI1,2()
摘要:
为研究结构细节对人行悬索桥人致振动响应及行人舒适度的影响,以某人行玻璃悬索桥为工程实例,分别建立了竖直吊杆模型和倾斜吊杆模型,分析了不同吊杆对自振特性和人致振动响应的影响,并基于德国EN03规范对行人舒适度进行了评估.结果表明:竖直吊杆模型横向及竖向基频均小于倾斜吊杆模型,但两种吊杆模型下该桥的振动频率均较低,说明结构整体柔性较大;两种吊杆模型中,计入人群质量后,各阶自振频率和主梁最大加速度均随行人密度的增加而减小;同一人流量下,主梁在对应不同模态的行人步频下加速度最大值均不同,但同一工况下倾斜吊杆模型的横弯和竖弯加速度数值均较竖直吊杆模型有所下降;两种吊杆模型的横向舒适度综合评价相同,竖向舒适度综合评价倾斜吊杆模型更优,倾斜吊杆可以有效加强改人行悬索桥的横向和竖向刚度。
中图分类号:
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