[1] Hui Yingxin, Wang Wenwei, Liu Xinnan, et al. Comfort evaluation of prefabricated and assembledpedestrian cable-stayed bridges [J]. Journal of Southeast University (English Edition), 2023, 39 (1): 26-32. [doi:10.3969/j.issn.1003-7985.2023.01.004]

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Comfort evaluation of prefabricated and assembledpedestrian cable-stayed bridges()

预制拼装人行斜拉天桥舒适度评价

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

39

Issue:

2023 1

Page:

26-32

Research Field:

Traffic and Transportation Engineering

Publishing date:

2023-03-20

Info

Title:

Comfort evaluation of prefabricated and assembledpedestrian cable-stayed bridges

预制拼装人行斜拉天桥舒适度评价

Author(s):

Hui Yingxin¹;  2;  Wang Wenwei³;  Liu Xinnan³

¹ School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
² Ningxia Hui Autonomous Region Engineering Technology Research Center for Maintenance, Yinchuan 750004, China
³ School of Transportation, Southeast University, Nanjing 211189, China

惠迎新¹;  2;  王文炜³;  刘欣楠³

¹ 宁夏大学土木与水利工程学院, 银川 750021; ² 宁夏回族自治区道路养护工程技术研究中心, 银川 750004; ³ 东南大学交通学院, 南京 211189

Keywords:

prefabricated assembled pedestrian cable-stayed bridge;  elastic connection stiffness;  vehicle load;  vibration;  comfort evaluation

预制拼装人行斜拉天桥;  弹性连接刚度;  车辆通行荷载;  振动;  舒适度评价

PACS:

U441.3

DOI:

10.3969/j.issn.1003-7985.2023.01.004

Abstract:

To study the vibration responses of prefabricated assembled structures, the comfort of a prefabricated assembled pedestrian cable-stayed bridge was evaluated by limiting the acceleration behavior of the structure. The mode shapes and natural frequencies of the structure under ambient excitation were determined by installing acceleration sensors at the control points. According to the structural characteristics of the elastic connection of the bridge deck splicing, the stiffness of the elastic connection between adjacent segments was determined. Pedestrian and vehicle traffic load analysis models were established according to relevant guidelines. The peak acceleration and acceleration limit under pedestrian and vehicle traffic loads were compared, and the comfort degree of the pedestrian cable-stayed bridge was evaluated. The results show that the natural vibration frequency and peak acceleration match well with the measured values. Considering the reduction of the structural stiffness caused by the prefabricated assembly, the vibration characteristics of the prefabricated assembly structure can be truly reflected thereafter. The comfort evaluation index of the prefabricated assembly structure is consistent with that of the integral structure. The coupling effect between the pedestrian load and vehicle traffic load can be significantly ignored. The vehicle traffic load has a certain degree of influence on structural comfort.

为深入研究预制拼装结构的人致振动特性, 采用限制结构加速度响应的方法, 对某预制拼装人行斜拉天桥的舒适度进行评价.通过在控制点布设加速度传感器, 获得结构在环境激励下的振型、自振频率及阻尼比;根据桥面拼接的弹性连接结构特性, 确定相邻节段间的弹性连接刚度;参照国内外相关规范, 建立行人和车辆通行荷载分析模型, 获得各种荷载工况下的峰值加速度, 分析人行天桥的舒适度.结果表明:结构的自振频率和峰值加速度与实测值吻合良好, 从而验证了有限元分析模型的有效性;考虑预制拼装对结构刚度的折减可以更真实地反应结构的振动特性, 预制拼装结构的舒适度评价指标与整体式结构一致;人群质量对该结构振动频率的影响较小, 可以不考虑人群荷载与车辆通行荷载的耦合作用;车辆通行荷载对结构的舒适度产生一定程度的影响.

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Memo

Memo:

Biography: Hui Yingxin(1985—), male, doctor, professor, huiyx@seu.edu.cn.
Foundation item: National Natural Science Foundation of China(No. 51578135, 51878156, 52268077), Postgraduate Research and Practice Innovation Program of Jiangsu Province(No. SJCX17_0042, KYCX18_0126), Key R&D Program of Ningxia Hui Autonomous Region(No. 2022 BEG03062).
Citation: Hui Yingxin, Wang Wenwei, Liu Xinnan. Comfort evaluation of prefabricated and assembled pedestrian cable-stayed bridges[J].Journal of Southeast University(English Edition), 2023, 39(1):26-32.DOI:10.3969/j.issn.1003-7985.2023.01.004.

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