A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on vibration comfort of steel structure pedestrian bridges in slow moving systems
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.
Research on vibration comfort of steel structure pedestrian bridges in slow moving systems
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.
Research on vibration comfort of steel structure pedestrian bridges in slow moving systems
Atlantis Highlights in Engineering
Zhao, Gaofeng (editor) / Mei, Guoxiong (editor) / Xu, Zengguang (editor) / Zhang, Fei (editor) / Xiong, Zhenwei (author) / Zhang, Yongping (author) / Wu, Changgen (author) / Zhang, Shougui (author) / Li, Genqin (author)
International Conference on Civil Architecture and Urban Engineering ; 2023 ; Xiamen, China
2024-02-11
10 pages
Article/Chapter (Book)
Electronic Resource
English
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