SBIR PHASE I: Electrorheological Fluid Dampers for Control and Damage Reduction of Earthquake Motion in Buildings and Bridges

SBIR 第一阶段：用于控制和减少建筑物和桥梁地震运动损害的电流变流体阻尼器

• 批准号: 9560256
• 负责人: Douglas Taylor
• 金额: $ 7.41万
• 依托单位: TAYLOR DEVICES, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-02-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9560256&HistoricalAwards=false
• 关键词: SBIR; PHASE; Electrorheological; Fluid; Dampers

9560256 Taylor The purpose of this SBIR Phase I grant is to construct and test a full size fluid damper using electrorheological (ER) fluid as its operating medium. The damper can be installed within the frame of a building or bridge to increase the structure's capability to resist earthquake loads. The damper uses a unique monolithic control valve having no moving parts and using internal flows of the ER fluid. The valve is electronically activated by a control signal to alter the damping constant of the damper. When activated, ER fluids radically increase in viscosity, approaching a gel-like state. This change of state can occur instantaneously and disturbs flow through the control valve, thus greatly increasing the damper's resistance. This also allows the damper to respond to the extremely broad range of frequencies existing in a structure during a seismic event This research will allow the active control of building and bridges subjected to earthquakes motions, reducing or eliminating damage during maximum credible seismic motions. The damping forces dissipate the seismic energy, thus greatly reducing damage to the structure. Because the required power to operate an ER damper us very low, even conventional batteries become effective sources of control power for massive structures. Specific structures which will show the greatest improvements are steel frame buildings and reinforced concrete highway bridges.

9560256 Taylor SBIR 第一阶段拨款的目的是建造和测试使用电流变 (ER) 流体作为工作介质的全尺寸流体阻尼器。 阻尼器可以安装在建筑物或桥梁的框架内，以提高结构抵抗地震荷载的能力。 阻尼器采用独特的整体式控制阀，没有移动部件，并使用 ER 流体的内部流动。 该阀门由控制信号以电子方式激活，以改变阻尼器的阻尼常数。 激活后，缓释液的粘度急剧增加，接近凝胶状态。 这种状态的变化可以瞬间发生并扰乱通过控制阀的流动，从而大大增加阻尼器的阻力。 这也使得阻尼器能够在地震事件期间对结构中存在的极宽范围的频率做出响应。这项研究将允许主动控制遭受地震运动的建筑物和桥梁，减少或消除最大可信地震运动期间的损坏。 阻尼力消散地震能量，从而大大减少对结构的损坏。 由于操作 ER 阻尼器所需的功率非常低，因此即使是传统电池也能成为大型结构的有效控制电源。 改进最大的具体结构是钢框架建筑和钢筋混凝土公路桥梁。