Developments for real-time pseudodynamic (PSD) and hybrid PSD test methods

实时伪动力 (PSD) 和混合 PSD 测试方法的发展

• 批准号: 371627-2009
• 负责人: Mercan, Oya
• 金额: $ 1.75万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=550082
• 关键词: Developments; real; time; pseudodynamic; PSD

The potential for earthquakes to cause loss of life, structural damage and interruption of service is of great concern, and has gained increased awareness in the development of performance based design of structures. Numerous devices (e.g., elastomeric and magnetorheological dampers) have been recently developed as a means of reducing the seismic hazard in structures. To enable widespread use of these load-rate dependent devices, it is necessary to develop performance based design codes which require knowledge of structural performance from real-time tests of structures equipped with these devices. The real-time pseudodynamic (PSD) and hybrid PSD test methods offer ideal ways to address this need, where in the latter method only the critical components are physically tested and the remaining part of the structure is modeled in a computer. In real-time testing, the need to operate hydraulic actuators at fast rates inevitably brings along control issues; and unless the time delays (due to actuator response time, communication, computing time, etc.) are accurately compensated, accuracy and stability problems are likely to occur. The challenges include accurate control of multiple actuators that introduce variable time delay, representative modeling of the analytical substructure and its execution in real-time, and the lack of a standardized tool to establish the quality of the real-time test results. The proposed research program aims to gain an in-depth understanding necessary to handle the current challenges; to develop methodologies to overcome them; and thereby to enable a broader domain of application for these test methods. By presenting structural engineers with enhanced testing methodologies, the proposed program will contribute to the design and understanding of next generation structures.

地震导致生命丧失，结构性损害和服务中断的潜力引起了人们的关注，并且在基于绩效的结构设计发展方面提高了人们的意识。最近开发了许多设备（例如弹性和磁性阻尼器），以减少结构中的地震危害。为了广泛使用这些载荷率依赖设备，有必要开发基于性能的设计代码，这些设计代码需要从配备这些设备的结构的实时测试中了解结构性性能。实时伪动力学（PSD）和混合PSD测试方法提供了满足这种需求的理想方法，在后一种方法中，仅对关键组件进行物理测试，并且结构的其余部分在计算机中建模。在实时测试中，以快速速度操作液压执行器的需求不可避免地会带来控制问题。除非时间延迟（由于执行器响应时间，通信，计算时间等）是准确补偿的，否则可能会出现准确性和稳定问题。挑战包括对多个执行器的准确控制，这些执行器会引入可变的时间延迟，对分析子结构的代表性建模及其实时执行，以及缺乏标准化工具来确定实时测试结果的质量。拟议的研究计划旨在获得应对当前挑战所必需的深入理解。开发方法来克服它们；从而为这些测试方法提供了更广泛的应用领域。通过向结构工程师提供增强的测试方法，该计划将有助于对下一代结构的设计和理解。