亢谷景区大跨径人行玻璃悬索桥人致振动响应分析

doi:10.3969/j.issn.1674-0696.2020.12.10

重庆交通大学学报（自然科学版） ›› 2020, Vol. 39 ›› Issue (12): 60-66.DOI: 10.3969/j.issn.1674-0696.2020.12.10

亢谷景区大跨径人行玻璃悬索桥人致振动响应分析

陈思甜，彭庆，杨敏

(重庆交通大学土木工程学院，重庆 400074)

收稿日期:2019-08-27 修回日期:2019-11-06 出版日期:2020-12-18 发布日期:2020-12-18
作者简介:陈思甜（1963—），男，四川宣汉人，教授，主要从事桥梁设计、施工、监控方面的研究。E-mail: sitianchen@qq.com 通信作者：彭庆（1993—），男(土家族)，重庆人，硕士研究生，主要从事桥梁结构理论与设计方面的研究。E-mail: 826928499@qq.com
基金资助:

Human-Induced Vibration Response Analysis of Long-Span Pedestrian Suspension Glass Bridge in Kanggu Parkland

CHEN Sitian, PENG Qing, YANG Min

(College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China)

Received:2019-08-27 Revised:2019-11-06 Online:2020-12-18 Published:2020-12-18
Supported by:

摘要/Abstract

摘要： 大跨度人行悬索桥具有轻柔、低阻尼的特点，其自振频率往往很低，处于行人步频敏感范围内，使得人致振动成为该类桥设计不可忽视的问题，尤其以游客密集的景区悬索桥更甚。基于非线性有限元软件，对亢谷景区大跨径玻璃悬索桥应用直接共振理论，选择典型竖弯和侧弯振型，通过有限元时程分析方法，计算获得不同人群荷载激励下桥面的竖向和侧向加速度响应时程曲线。结果表明：该桥自振频率小，多阶自振频率处于步频敏感范围内；在人群步频激励下易引起桥梁的明显振动，影响桥梁使用舒适性，为此提出相应减振措施。

关键词: 桥梁工程, 玻璃悬索桥, 人致振动, 行人舒适度, 减振措施

Abstract: The long-span pedestrian suspension bridge has the characteristics of light weight and low damping, and its natural vibration frequency is often very low, which is within the sensitive range of pedestrian step frequency. Therefore, human-induced vibration becomes a problem that cannot be ignored in the design of this type bridges, especially for suspension bridges in scenic spot. Based on the nonlinear finite element software, the typical vertical and lateral bending modes of the long-span glass suspension bridge in the Kanggu parkland were selected by using the direct resonance theory.Through the finite element time-history analysis method, the vertical and lateral acceleration response time-history curves of bridge deck under different crowd loads were calculated and obtained. The results show that the natural vibration frequency of the proposed bridge is small and the multi-order natural vibration frequencies are in the sensitive range of human step frequency.It is easy to cause obvious vibration of the bridge under the crowd step frequency excitation, which affects the comfort of the bridge. Therefore, the corresponding vibration reduction measures should be proposed.

Key words: bridge engineering, glass suspension bridge, human-induced vibration, pedestrian comfort, vibration reduction measures

中图分类号:

U441.3

陈思甜，彭庆，杨敏. 亢谷景区大跨径人行玻璃悬索桥人致振动响应分析[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 60-66.

CHEN Sitian, PENG Qing, YANG Min. Human-Induced Vibration Response Analysis of Long-Span Pedestrian Suspension Glass Bridge in Kanggu Parkland[J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(12): 60-66.

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亢谷景区大跨径人行玻璃悬索桥人致振动响应分析

Human-Induced Vibration Response Analysis of Long-Span Pedestrian Suspension Glass Bridge in Kanggu Parkland

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