Control of seismically excited cable-stayed bridge using a resetting semi-active stiffness damper
Control of seismically excited cable-stayed bridge using a resetting semi-active stiffness damper
复制标题
使用复位半主动刚度阻尼器控制地震激励斜拉桥
DOI：
10.1109/acc.2001.945867
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
W. He
中科院分区：
文献类型：
--
作者：
A. Agrawal;W. He
斜拉桥由于柔度大、质量小、固有阻尼小，容易发生大幅振动。因此，降低斜拉桥的地震或风致振动对斜拉桥的安全性和使用性能至关重要。针对S.J.Dyke等（2000）提出的斜拉桥地震响应峰值控制的基准问题，利用复位半主动刚度阻尼器（RSASD）对斜拉桥地震响应峰值进行控制。基准斜拉桥的模型基于美国密苏里州吉拉多角正在建设的实际斜拉桥。本研究的主要目的是研究保护装置的应用，如半主动和被动阻尼器，在减少位移的甲板，以及在塔的基础上的基础剪力和力矩。在这项研究中，我们研究了复位半主动阻尼器（RSASD）以及被动粘滞阻尼器和流体阻尼器的基准桥梁问题的应用。通过在桥墩和桥面之间安装RSASD装置以及被动粘滞阻尼器和摩擦阻尼器进行了数值模拟。数值结果表明，安装这些保护装置后，塔底的剪力和弯矩以及桥面的位移都有明显的减小。
Cable-stayed bridges are prone to exhibit large amplitude oscillations due to the large flexibility, small mass and small inherent damping. Hence, the reduction of seismic or wind-induced vibration of cable-stayed bridges is vital for their safety and serviceability. A resetting semi-active stiffness damper (RSASD) is utilized to control the peak dynamic response of a benchmark problem on cable-stayed bridge subject to earthquakes developed recently by S.J. Dyke et al (2000). The model of the benchmark cable-stayed bridge is based on the actual cable-stayed bridge that is under construction on Cape Girardeau, Missouri, USA. The prime aim of the study is to investigate the application of protective devices, such as semi-active and passive dampers, in reducing the displacement of the deck as well as base shear and moments at the base of the towers. In this research, we have investigated the applications of resetting semi-active damper (RSASD) as well as passive viscous and fluid dampers to the benchmark bridge problem. Numerical simulations are conducted by installing RSASD devices as well as passive viscous and friction dampers between the pier and the deck of the bridge. Numerical results clearly indicate that the displacement of the deck, and those of the shear and moment at the base of the towers are reduced substantially by installing these protective devices.