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

结构系统的高性能减振装置应具有坚固、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型摩擦装置具有在结构系统运动速度小的情况下提供大阻尼力的潜力。建议在实验室中开发这种装置，并评估其在动态载荷下的性能。如果实验室模型被发现是可行的，未来可以制造一个原型来对其在实践中的效果进行大规模测试。本研究建议：(1)构建实验室尺度的改进型摩擦装置；(2)表征其动态特性；(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坚固的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不同控制输入的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，该减震装置在建筑框架中的有效性将被数值研究。此外，还将进行分析，以评估该装置的成本效益。一家工业公司的机械制造和施工专业知识将帮助确定减震装置的功效。

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.