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Effect of TMD on fatigue life of steel-glass footbridge model
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Fa-rong Ma1, 2, Qian-kun Zhu2, Xing-long Pu1, 2, Yong-feng Du2
Journal of Vibration Engineering | 2024, 37(6) : 928 - 936
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Journal of Vibration Engineering | 2024, 37(6): 928-936
Effect of TMD on fatigue life of steel-glass footbridge model
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Fa-rong Ma1, 2, Qian-kun Zhu2, Xing-long Pu1, 2, Yong-feng Du2
Affiliations
  • 1School of Civil Engineering, Hexi University, Zhangye 734000, China
  • 2Institute of Earthquake Prevention and Disaster Reduction, Lanzhou University of Technology, Lanzhou 730050, China
Published: 2024-06-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.06.003
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Research on the increasingly significant issue of fatigue failure in pedestrian structures due to crowd-induced vibrations is limited. This paper uses a steel-glass footbridge as a test platform to study the fatigue performance of the footbridge before and after the installation of a Tuned Mass Damper （TMD）. The APS400 electronic shaker is used to simulate pedestrian load，and long-term strain monitoring data is analyzed to determine the fatigue stress spectrum and daily average damage degree of the structure，which is then used to estimate its fatigue life. The results show that the installation of the TMD reduced the peak acceleration at half of the structure from 0.15 m/s2 to 0.084 m/s2，a vibration reduction rate of 44.0%. The peak displacement was reduced from 2.98 mm to 0.92 mm，a vibration reduction rate of 69.1%； and the strain amplitude was reduced from 40 to 13，a vibration reduction rate of 67.5%. The amplitude of the equivalent effect force across the middle of the structure is the largest，and the fatigue life is the shortest，at 74 years. After the installation of the TMD，the fatigue life of the structure span increased to 2880 years，nearly 39 times longer，and the fatigue life at other measurement points extended by 3.95 times and 7.41 times.

steel-glass footbridge  /  fatigue damage  /  strain monitoring  /  fatigue stress spectrum  /  fatigue life
Fa-rong Ma, Qian-kun Zhu, Xing-long Pu, Yong-feng Du. Effect of TMD on fatigue life of steel-glass footbridge model[J]. Journal of Vibration Engineering, 2024 , 37 (6) : 928 -936 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.06.003
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doi: 10.16385/j.cnki.issn.1004-4523.2024.06.003
  • Receive Date：2022-08-25
  • Online Date：2026-02-09
  • Published：2024-06-28
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  • Received：2022-08-25
  • Revised：2022-10-27
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Affiliations
    1School of Civil Engineering, Hexi University, Zhangye 734000, China
    2Institute of Earthquake Prevention and Disaster Reduction, Lanzhou University of Technology, Lanzhou 730050, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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