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

人-结构相互作用（HSI）是一个严重误解的工程研究领域，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，它在土木和结构学科中具有重要意义。例如，伦敦千禧人行桥在开放当天和周末突然出现横向振动和摇晃。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佳方式建造。随着科学、技术、工程和数学（STEM）领域的不断进步，理解未知现象的需求推动着我们创造一个更美好的生活世界。在城市的基础设施中，平民的安全是最重要的。因此，结构的可用性和维护是确保它的关键。这个研究领域非常独特，因为它从大量的工程学科中汲取，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、非线性动力学和群体动力学是至关重要的领域。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与人之间的机制？恒指的动态反馈如何可能产生复杂和意想不到的共振？本研究旨在探讨不同人体负荷情况下的HSI现象。具体来说，在桥梁和看台结构中，人类的步态，跳跃和摆动。本研究的框架将包括理论和实验工作。将完成对桥梁人群加载事件的全尺寸数据的分析。系统识别技术将用于有效地处理和分类数据。它将被用来更好地理解和分类所涉及的潜在机制。同时，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这些模型检验中的应用。这将通过使用计算软件MATLAB进行深入的参数化研究来模拟响应。其目的是简化他们在一个明确的方式持有的主要特点和基本原则，同时仍然提供准确的结果。目标是将其发展成一个全局系统结构，可以用作设计目的的一般案例。这项研究的结果将创建精确的动态模型，以帮助土木和机械结构的设计、建造和维护。它可能导致系统补偿器的进步，如逆变器；比如f1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.