Research on the Influence of Linear Stiffness Design on Human-Induced Vibration Comfort of Steel Box Girder Footbridge

DOI

10.2991/978-94-6463-658-1_94How to use a DOI?

Keywords

Slow traffic system; Footbridge; Vibration comfort; Steel box girder; Peak acceleration; Linear stiffness

Abstract

This study investigates and analyzes the sensitive parameters affecting the comfort of simply-supported steel box girder pedestrian bridges. In response to human-induced vibrations, this study explores the relationship between structural bending stiffness, span length, and peak acceleration. The concept of linear stiffness is introduced, and employing the dynamic response limitation method, the threshold values for linear stiffness required to fulfill the comfort criteria for simply supported steel box girder pedestrian bridges across diverse spans are established. From a design perspective, this study proposes recommended values for bending stiffness that ensure adherence to comfort standards, accompanied by a methodology for evaluating the comfort levels of pedestrian bridges subjected to human-induced vibrations. The results demonstrate that for steel box girder bridges with spans up to 20m, the natural frequency of the structure typically exceeds 3 Hz, thereby enabling the fulfillment of comfort requirements through the avoidance of resonance with critical frequencies. However, for spans exceeding 20m, where the natural frequency typically falls below 3 Hz, adherence to the linear stiffness criteria presented in this study is essential, as determined by the dynamic response limitation method. The initial assessment of comfort should be based on the natural frequency method; if the natural frequency criteria are not met, a subsequent analysis should be conducted using the dynamic response limitation method.

Copyright

© 2025 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  - Liang Zeng
AU  - Xilong Chen
AU  - Fucheng Wu
AU  - Huimin Chen
PY  - 2025
DA  - 2025/03/03
TI  - Research on the Influence of Linear Stiffness Design on Human-Induced Vibration Comfort of Steel Box Girder Footbridge
BT  - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024)
PB  - Atlantis Press
SP  - 896
EP  - 909
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-658-1_94
DO  - 10.2991/978-94-6463-658-1_94
ID  - Zeng2025
ER  -