Developing the Next Generation of Cost-Effective High Performance Damping Systems for Seismic and Wind Hazards Mitigation

开发下一代经济高效的高性能阻尼系统以减轻地震和风灾

• 批准号: 1300960
• 负责人: Simon Laflamme
• 金额: $ 20.07万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1300960&HistoricalAwards=false
• 关键词: Developing; Next; Generation; Cost; Effective

High performance damping devices for structural system should be robust, reliable, and deliver large damping force to be effective at mitigating earthquake and wind loading impact. A semi-active modified friction device using technology of drum brakes has a potential of providing large damping force under small velocity of the structural system movement. It is proposed to develop such a device in a laboratory and assess its performance under dynamic loading. If the laboratory model is found to be viable, a prototype can be fabricated in the future to perform large scale testing for its efficacy in practice.The research proposes to: (1) construct a laboratory scale modified friction device; (2) characterize its dynamic behavior; and (3) assess its cost-effectiveness for use as dampers in multi-story buildings. The key components of the device are robust drum-brake technology and battery-based semi-active control. The laboratory tests will involve assessing relationship between the damping force at varying control inputs and movement of the structural system. Effectiveness of the damping device in building frames under earthquake and wind loading will be pursued numerically. In addition, analyses will be performed to assess cost-effectiveness of the device. Mechanical fabrication and construction expertise of an industrial company will assist in establishing efficacy of the damping device.

结构体系的高性能阻尼装置应具有坚固、可靠、阻尼力大的特点，才能有效地减轻地震和风荷载的影响。采用鼓式制动器技术的半主动改进摩擦装置具有在结构系统运动小速度下提供大阻尼力的潜力。建议在实验室开发该装置，并对其在动载下的性能进行评估。如果实验室模型被证明是可行的，未来可以制造一个原型来进行大规模的测试，以验证其在实践中的有效性。研究建议：(1)构建实验室规模的改进型摩擦装置；(2)表征其动力特性；(3)评估其作为多层建筑阻尼器的成本效益。该装置的关键部件是稳健鼓式制动技术和基于电池的半主动控制。实验室测试将包括评估在不同控制输入下阻尼力与结构系统运动之间的关系。在地震和风荷载作用下，对建筑框架阻尼装置的有效性进行数值研究。此外，还将进行分析以评估该设备的成本效益。工业公司的机械制造和施工专业知识将有助于建立阻尼装置的功效。