Research on vibration comfort of steel structure pedestrian bridges in slow moving systems

DOI

10.2991/978-94-6463-372-6_11How to use a DOI?

Keywords

slow moving system bridge; vibration frequency; comfort

Abstract

The current urban life needs a public, very attractive, leisure and entertainment space that can enjoy ecological services. Based on the above requirements, the slow traffic system bridge plays a role of “stringing beads into a chain” in the ecological park around the city. Its design complexity and construction difficulty are increasing, and its vibration comfort problem is becoming increasingly prominent. This paper analyzes the bridge load conditions of the slow traffic system, and summarizes the walking load and pedestrian comfort standards. The finite element model of a long-span steel structure slow travel system bridge in Chengdu was analyzed, and its vibration frequency was calculated to be 2.29 Hz. In this paper, 8 sets of TMDs with a single weight of 0.5 tons are arranged in the middle span of the bridge overpass, and 6 sets of TMDs with a single weight of 0.5 tons are arranged on each side span, with a total mass of 10 tons. The model damping design shows that TMD can play a good damping effect, which can control the vibration caused by pedestrian load within the specification requirements, so that the maximum vertical acceleration under the most unfavorable working conditions is reduced from 65.3 cm/s2 to 17.1 cm/s2, which is less than the 50 cm/s2 required by the comfort standard, and effectively improves the comfort of bridge use.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zhenwei Xiong
AU  - Yongping Zhang
AU  - Changgen Wu
AU  - Shougui Zhang
AU  - Genqin Li
PY  - 2024
DA  - 2024/02/12
TI  - Research on vibration comfort of steel structure pedestrian bridges in slow moving systems
BT  - Proceedings of the 2023 5th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2023)
PB  - Atlantis Press
SP  - 101
EP  - 110
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-372-6_11
DO  - 10.2991/978-94-6463-372-6_11
ID  - Xiong2024
ER  -