Multi-Axial Shake Table (MAST) and Data Acquisition/Control System

多轴振动台 (MAST) 和数据采集/控制系统

• 批准号: 405998-2011
• 负责人: Kwon, OhSung
• 金额: $ 10.59万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=472362
• 关键词: Multi; Axial; Shake; Table; MAST

During an earthquake event, structural elements are subjected to multi-axial loads due to the multiple components of ground motions and seismic response of a structural system. Furthermore, the dynamic interaction of soil, foundation, and structure system develops additional rotational and translational components in foundation input motion. To fully understand how the multi-axial loads affect the seismic response of structural elements, it is essential to use equipment which can apply the multi-axial loads to a structural specimen. The equipment that will be acquired through the NSERC RTI Program consists of a Multi-Axial Shake Table (MAST) and data acquisition/control system. The requested MAST system can simulate earthquake motions in four Degree of Freedoms (DOFs), and will be expandable to a full six DOFs system in the future. The data acquisition/control system will be an interface between the MAST and an analytical model. With the requested equipment a critical component of a structure can be represented by a physical specimen while the rest of the structure can be numerically modeled. The two components can be fully integrated using hybrid simulation methods. The requested equipment will be used to support the NSERC Discovery Grant entitled 'Investigation on the effects of liquefaction and soil-structure-interaction (SSI) on the seismic response of structures. Within the research program, the requested equipment will be used to develop hybrid simulation methods for SSI systems. In addition, the equipment will be used to support other research projects including: 1) the effects of vertical and horizontal ground motions on the response of isolation bearings; 2) investigation of the effects of multi-axial loading on the collapse mechanism of a structural system; and 3) investigation of the transition from equivalent viscous damping to hysteretic damping through a series of small scale dynamic experiments. The research carried out with the equipment will have a direct impact on the society by providing advanced methods for the seismic simulation of structures and by increasing our current understanding of the seismic response of structures subjected to multi-axial loads.

在地震事件中，由于地面运动的多个组成部分和结构系统的地震响应，结构元素会承受多轴负荷。此外，土壤，粉底和结构系统的动态相互作用在基础输入运动中发展出其他旋转和翻译成分。为了充分了解多轴载荷如何影响结构元素的地震响应，必须使用可以将多轴负载施加到结构标本的设备。将通过NSERC RTI程序获取的设备由多轴震动表（MAST）和数据采集/控制系统组成。请求的桅杆系统可以模拟四个自由（DOF）的地震运动，并将在将来扩展到完整的六个DOF系统。数据采集​​/控制系统将是桅杆和分析模型之间的接口。使用请求的设备，结构的关键组成部分可以由物理标本表示，而结构的其余部分可以进行数值建模。可以使用混合模拟方法完全集成了这两个组件。请求的设备将用于支持NSERC DISCOVERY赠款，名为“对液化和土壤结构交流（SSI）对结构地震反应的影响的研究。在研究计划中，请求的设备将用于开发SSI系统的混合模拟方法。此外，该设备将用于支持其他研究项目，包括：1）垂直和水平地面运动对隔离轴承响应的影响； 2）研究多轴负荷对结构系统塌陷机制的影响； 3）研究通过一系列小规模动态实验的从等效粘性阻尼到滞后阻尼的过渡。用设备进行的研究将通过提供对结构的地震模拟的先进方法，并通过提高我们当前对受多轴负载结构的地震反应的理解，对社会产生直接影响。