Field Measurement and Serviceability Assessment of a Series of Footbridges with Different Configuration
Many footbridges may suffer from the intensive vibration induced by human activities. To be a direct and effective approach ,field measurement is widely utilized to assess the vibration serviceability of footbridge. Several typical footbridges with different structural configuration are taken as real examples to investigate the pedestrian -induced vibration through field measurement. The dynamic responses of the example footbridge under ambient excitations are collected through field measurement to identify the natural frequencies and mode shape of the footbridge by using Natural Excitation Technique ( NexT) and Eigensystem Realization Algorithm (ERA). The effects of footbridge configuration on structural dynamic properties are investigated based on collected dynamic re -sponses. The footbridges with similar structural configuration are compared each other to explore the influence of various parameters such as , span, width and etc on structural natural frequencies and dynamic serviceability. The vibration serviceability of the footbridge is evaluated based on dynamic responses made from field measurement in line with the specifications such as ISO 10137 and BS5400. The analytical results in this study can be taken as the references for the assessment of the pedestrian-induced vibration and dynamic serviceability of footbridges.
Bo CHEN Weiping XIE Na ZHAO
Key Laboratory of Roadway Bridge and Structural Engineering ,Wuhan 430070,China School of Civil Engineering and Architecture , Wuhan University of Technology ,Wuhan 430070,China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
561-567
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）