Assessment of human-structure interaction on a lively lightweight GFRP footbridge
Assessment of human-structure interaction on a lively lightweight GFRP footbridge
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DOI：
10.1016/j.engstruct.2019.109687
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发表时间：
2019-11
影响因子：
5.5
通讯作者：
E. Ahmadi;C. Caprani;S. Z̆ivanović;A. Heidarpour
中科院分区：
文献类型：
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作者：
E. Ahmadi;C. Caprani;S. Z̆ivanović;A. Heidarpour
人类活动和占用会引起过度的结构振动。人-结构相互作用（HSI）可以显著影响响应。然而，由于缺乏实验研究，这种现象在许多设计指南中没有考虑到。与此同时，轻质高强度材料如玻璃纤维增强聚合物（GFRP）的应用越来越多。这种结构的振动灵敏度还不是很清楚，尽管由于人与结构的高质量比，它可能是重要的。本文研究了HSI对一座轻型玻璃钢人行桥振动响应预测的影响，并将结果与一座重型混凝土复合人行桥的结果进行了比较。进行了广泛的测试试验，伴随着对步行者的振动感知的调查。量化了高强度对轻型桥梁振动响应的影响。结果发现，非相互作用的移动力模型产生的预测，特别是对玻璃钢桥梁。研究还发现，桥梁的振动对步行力有很大的影响，在较小程度上对人-结构系统的动力学。最后，它被发现，约2的响应因子是适当的，以确定步行者的振动容忍度。
Human activities and occupancy can induce excessive structural vibrations. Human-structure interaction (HSI) can significantly affect responses. However, this phenomenon is not accounted for in many design guidelines due to lack of experimental studies. Concurrently, there is increasing application of lightweight high-strength materials such as glass fibre reinforced polymer (GFRP). The vibration sensitivity of such structures is not yet well known, despite the expectation that it could be important due to high human-to-structure mass ratio. This paper examines the effect of HSI on the vibration response prediction of a lively lightweight GFRP footbridge, and it compares the results to those from a heavy concrete-composite footbridge. An extensive ensemble of test trials was conducted, accompanied by a survey on vibration perception by the walkers. The influence of HSI on the lightweight bridge vibration response is quantified. It is found that the non-interacting moving force models produce poor predictions, especially for the GFRP bridge. It is also found that vibration of the bridge had a strong influence on walking force, and to a lesser extent on the dynamics of the human-structure system. Finally, it is found that a response factor of about 2 is appropriate for determining the vibration tolerance level by walkers.