...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Experimental validation of a simplified model for rolling isolation systems
【24h】

Experimental validation of a simplified model for rolling isolation systems

机译：滚动隔离系统简化模型的实验验证

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rolling isolation systems (RISs) protect mission-critical equipment and valuable property from earthquake hazards by decoupling the dynamic responses of vibration-sensitive objects from horizontal floor motions. These responses involve the constrained rolling of steel balls between bowl-shaped surfaces. The light damping of steel balls rolling between steel plates can be augmented by adhering thin rubber sheets to the plates, thereby increasing the rolling resistance and decreasing the displacement demand on the RIS. An assessment of the ability of lightly- and heavily-damped RISs to mitigate the hazard of seismically induced failures requires high-fidelity models that can adequately capture the systems' intrinsic nonlinear behavior. The simplified model presented in this paper is applicable to RISs with any potential energy function, is amenable to both lightly- and heavily-damped RISs, and is validated through the successful prediction of peak responses for a wide range of disturbance frequencies and intensities. The validated model can therefore be used to compute the spectra of peak floor motions for which displacement demands equal capacity. These spectra are compared with representative floor motion spectra provided by the American Society of Civil Engineers 7-10. The damping provided by rolling between thin viscoelastic sheets increases the allowable floor motion intensity by a factor of 2-3, depending on the period of motion. Acceleration responses of isolation systems with damping supplied in this fashion do not grow with increased damping, even for short-period excitations.
机译：滚动隔离系统（RIS）通过将振动敏感对象的动态响应与水平地面运动分离开来，从而保护关键任务设备和有价值的财产免受地震危害。这些响应涉及碗形表面之间钢球的约束滚动。可以通过将薄橡胶片粘附到钢板上来增加在钢板之间滚动的钢球的光阻尼，从而增加滚动阻力并减少对RIS的位移要求。要评估轻度和重度阻尼RIS减轻地震引起的故障的危害的能力，就需要能够充分捕获系统固有非线性行为的高保真模型。本文介绍的简化模型适用于具有任何势能函数的RIS，适用于轻度和重度阻尼的RIS，并且已通过成功预测各种干扰频率和强度的峰值响应进行了验证。因此，经过验证的模型可用于计算位移需要相等容量的峰底运动频谱。这些频谱与美国土木工程师学会7-10提供的代表性地面运动频谱进行了比较。薄的粘弹性片材之间滚动产生的阻尼取决于运动周期将允许的地板运动强度提高2-3倍。以这种方式提供的带有阻尼的隔离系统的加速度响应不会随着阻尼的增加而增加，即使对于短周期的激励也是如此。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号