A Hybrid Sliding Isolation System with Controllable Friction Bearings

具有可控摩擦轴承的混合滑动隔震系统

• 批准号: 9223234
• 负责人: Maria Feng
• 金额: $ 32.24万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223234&HistoricalAwards=false
• 关键词: Hybrid; Sliding; Isolation; System; Controllable

Recently, a hybrid sliding isolation system employing computer-controllable friction bearings has been developed and proven to be more effective in controlling the seismic response of a single-degree-of-freedom system than the corresponding conventional passive sliding system. This proposed research intends to extend the applicability of this hybrid isolation system to multistory buildings by conducting a series of analytical and experimental investigations to develop an improved isolation system design. Analytical work will involve development of two control algorithms and computer simulation studies with different structural and isolation system parameters and different input motions. The experimental work will involve shaking table laboratory test on the proposed computer controllable isolation devices. The hybrid sliding isolation systems are more advantageous over the conventional passive systems in that they are more effective for earthquakes with a broad intensity range, and tend to be more robust. However, to fully implement such a system with confidence in practice, there appear to exist several major technical and practical problems that are yet to be overcome. The proposed research will develop: (1) improved friction controllable bearings with proper consideration of the problems of the possibility of uplifting and its prevention, choice of the proper materials for sliding interface, chamber pressure control, energy supply, and system maintenance, (2) robust control algorithms to satisfy requirements for simultaneously controlling three-dimensional multitudinous responses, such as floor acceleration, interstory deformation, and sliding displacement, and to prevent excessive overturning moment and uplifting problems associated with buildings, and (3) a unified computer codes package to conduct simulation studies of isolation performance on various building models under different earthquake excitations. The laboratory tests for component performance and scaled building model tests using a shaking table as well as the redesign of systems incorporating the changes suggested by the experimental results will also be performed in this study. The proposed research will resolve the remaining technical as well as practical problems existing with the innovative hybrid sliding isolation system - thus paving the way for its broad applications in building structures constructed in active seismic areas.

最近，一种混合滑动隔震系统， 研制了计算机控制的摩擦轴承 并被证明能更有效地控制地震 单自由度系统的响应比 相应的传统被动滑动系统。 这 拟议的研究旨在扩大适用性， 将这种混合隔震系统应用于多层建筑， 进行了一系列的分析和实验 研究开发改进的隔离系统 设计 分析工作将涉及制定两个 控制算法和计算机模拟研究， 不同的结构和隔震系统参数， 不同的输入动作。 实验工作将涉及 在建议的计算机上进行振动台实验室试验 可控隔离装置。 混合滑移隔震系统具有更大的优越性 相比传统的被动系统， 对强度范围较宽的地震有效， 趋向于更健壮。 然而，要全面落实这一 在实践中有信心的制度，似乎存在 一些主要的技术和实际问题， 被征服 本研究的目的是：（1） 改进的摩擦可控轴承， 考虑可能性的问题 隆起及其预防，选择合适的材料 用于滑动界面、腔室压力控制、能量 供应和系统维护，（2）鲁棒控制 同时满足要求的算法 控制三维众多的反应， 如楼板加速度、层间变形和滑动 位移，并防止过度的倾覆力矩 和与建筑物有关的隆起问题，以及（3） 进行模拟研究的统一计算机代码包 各种建筑模型的隔震性能， 不同的地震激励。 实验室测试 构件性能和比例建筑模型测试， 一个振动台以及系统的重新设计 结合实验提出的变化， 结果也将在本研究中进行。 这项研究将解决剩余的技术问题。 以及创新存在的实际问题， 混合滑动隔震系统-从而为 其在建筑结构中的广泛应用， 活跃的地震区。