Pedestrian's evaluation of structural vibration

当代建筑材料优异的机械性能和避免气候变化的迫切需要导致了非常细长、轻便和环保的行人结构。这些结构容易受到人类活动引起的过度振动的影响，伦敦千禧大桥和巴黎L-S-森戈尔帕塞莱尔大桥的不舒服振动就是明证。这些事件表明，人的振动舒适性已成为行人结构设计的主导标准。自那时以来，在模拟人类动态行为和由此产生的结构振动方面取得了重要进展；然而，模拟行人对结构振动的反应这一关键的最后步骤仍然不可靠。国家和国际设计准则之间存在着严重的不一致，每个准则都忽略了至少五个影响因素中的三个(振动幅度、振动频率、人体姿势、暴露时间和起搏频率)。感觉(行人对结构振动的评价)将首次考虑所有五个影响因素，使新的行人结构设计发生阶段性变化。对行人振动影响的主观和客观评估将通过使用埃克塞特最近建造的独特实验设施进行测量：运动模拟器VSim和生动的埃克塞特人行桥，EF。该项目将受益于很少在一个地方获得的技能和知识的结合：我在人为因素方面的专业知识，以及东道主在振动工程、人类运动科学和心理学方面的领导能力。结果(振动感知和可接受阈值以及相当的舒适性等高线)将使结构设计达到所需的舒适性和幸福感标准，并确立我在该研究领域的领导地位。

Excellent mechanical properties of contemporary construction materials and the urgent need to avert climate change are resulting in exceptionally slender, lightweight, and environmentally friendly pedestrian structures. These structures are susceptible to excessive vibrations due to human activities, as evidenced by uncomfortable vibrations at the opening of the Millennium Bridge in London and the Passerelle Léopold-Sédar-Senghor in Paris. These incidents have demonstrated that human's vibration comfort has become governing criterion in design of pedestrian structures. Important progress in modelling human dynamic actions and the resulting structural vibration has been made since then; however the crucial final step of modelling pedestrian's response to structural vibration remains unreliable. Significant inconsistencies exist across national and international design guidelines, each of which neglects at least three out of five influential factors (vibration amplitude, vibration frequency, human posture, exposure time and pacing frequency). SENSATION (pedeStrian's EvaluatioN of Structural vibrATION) will make a step-change in design of new pedestrian structures by considering all five influential factors for the first time. Both subjective and objective assessment of vibration effect on pedestrians will be measured by utilising unique experimental facilities recently built in Exeter: motion simulator, VSim, and lively Exeter Footbridge, EF. The project will benefit from a combination of skills and knowledge that are rarely available in one place: my expertise in human factors and host's leadership in vibration engineering, human motion science and psychology. The outcomes (vibration perception and acceptability thresholds and equivalent comfort contours) will enable design of structures with required standard of comfort and wellbeing and establish my leadership in this research field.