System Identification & investigation of Human-Structure-Interaction (HSI) phenomena in differing biomechanical loading situations

人-结构相互作用(HSI)是工程界一个严重误解的研究领域，严重缺乏现有结构的全尺寸实验数据。由于在以前记录的事件中观察到令人惊讶的复杂行为，这在民事和结构学科中具有严重重要性。例如，伦敦千禧年人行天桥在开放当天和周末突然发生横向振动，摇晃。这就提出了一个问题，即城市内部和整个城市的建筑是否以最好的方式建造。随着科学、技术、工程和数学(STEM)社区不断取得进步，理解未知现象的需要驱使我们创造一个更好的生活世界。民用安全是城市基础设施建设的重中之重。因此，结构的适用性和维护性是确保其正常使用的关键。这一研究领域非常独特，因为它借鉴了大量的工程学科，整合了各种概念和原理，以全面了解在HSI中观察到的现象。生物力学、非线性动力学和人群动力学等领域具有重要意义。我们能否通过生物力学原理有效地模拟人类的反应，以识别和量化观察到的结构和人之间的机制？HSI中的动态反馈是如何产生复杂和意外的共振的？本研究旨在探讨人体在不同负荷状态下的HSI现象。具体地说，在桥和看台结构中，在人类步态、跳跃和上下摆动中。这项研究的框架将包括理论工作和实验工作。将完成对一座桥梁的人群加载事件的全尺寸数据分析。将使用系统识别技术对数据进行有效处理和分类。它将被用来更好地理解和分类所涉及的潜在机制。此外，验证和微调当前的生物力学模型。理论范围将着眼于非线性动力学在检验这些模型中的应用。这将得到一项深入的参数研究的支持，该研究使用计算软件matlab来模拟响应。其目的是以明确的方式简化它们，以掌握主要特征和基本原理，同时仍提供准确的结果。其目的是将其发展成为一种全球体系结构，可作为通用的设计案例。这项研究的结果将创建精确的精细化动力学模型，有助于土木工程和机械结构的设计、施工和维护。这可能会导致惯性装置等系统补偿器的进步；例如，一级方程式赛车中的J阻尼器。

Human-Structure Interactions (HSI) is a severely misunderstood research area in engineering with a serious lack of full-scale experimental data from existing structures. It is of serious importance in the Civil and Structural disciplines due to the surprising complex behaviours observed in previous recorded incidents. For example, the sudden onset of lateral vibrations, wobbling, of the London Millennium Footbridge on its opening day and weekend. This has postulated the question of whether structures within and throughout cities are being constructed in the best manner. As advancements are constantly being made throughout the Science, Technology, Engineering & Mathematical (STEM) communities the need to understand unknown phenomena drives us to create a better world to live in. Civilian safety is of the upmost importance in the infrastructure of a city. Hence, the serviceability and maintenance of structures is crucial in ensuring it. This research area is very unique in that it draws from a large spectrum of engineering disciplines, integrating a variety of concepts and principles, to get a complete understanding of the phenomena observed in HSI. The fields of biomechanics, nonlinear dynamics and crowd dynamics are of crucial importance. Can we effectively model human responses through biomechanical principals to identify and quantify the mechanisms observed between structures and people? How is it possible that the dynamic feedback in HSI produces complex and unexpected resonances? This study aims to investigate the HSI phenomena in differing human loading situations. Specifically, in bridge and grandstand structures during human gait, jumping and bobbing. The framework of this study will comprise both theoretical and experimental work. Analysis of full-scale data from a crowd loading event of a bridge will be completed. System identification techniques will be used to effectively process and classify the data. It will be used to better understand and categorise the underlying mechanisms involved. Also, to validate and fine tune current biomechanical models. The theoretical scope will look at the application of nonlinear dynamics in the examination of these models. This will be supported by an in-depth parametric study using computational software, MATLAB, to simulate responses. The intention is to simplify them in a definitive way to hold the main characteristics and fundamentals whilst still providing accurate results. The objective is to develop this into a global system structure which can be used as a general case for design purposes.The outcome of this research will create accurately refined dynamic models aiding in the design, construction and maintenance of civil and mechanical structures. It could lead to the advancements in system compensators such as inerters; for example, J Dampers in Formula One.