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Slider bearing for seismic isolation using material combination .

机译:采用材料组合的隔震滑块轴承。

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摘要

Seismic isolation is one of the earthquake protective technologies used for buildings, bridges and other structures as well as non-structural components. Among the seismic isolation technologies, the newly developed roller bearing system ensures constant and low acceleration of superstructure and regulates bearing displacement. However, due to the limited contact area, to withstand large vertical force, the size of rollers must be large. To overcome this problem, a special slider will be used in this thesis to replace the roller. This slider bearing will have the identical dynamic behavior as the roller bearing and will support considerably large weight. The sliding surface is combined with two different materials with different friction coefficient, so that the slider bearing can provide a desirable friction coefficient to dissipate seismic energy while minimizing bearing displacement.;This thesis comprises both computational and experimental studies to examine the mechanical performance, along with an experimental study to analyze the uni-directional thermo-mechanical performance of this slider bearing system. The experiments are performed using a shaker table in the Structural Engineering and Earthquake Simulation Laboratory (SEESL), University at Buffalo. Four slider bearings are used to support a concrete mass as a superstructure on the table. Selected earthquake records are used as ground excitations. Accelerations of the table and superstructure were measured along with relative displacements between the table and superstructure.;Both the theoretical and experimental studies presented here show great potential of this slider bearing system. The dynamic performance of this seismic isolation slider bearing is virtually identical to the roller bearing, ensuring low level of accelerations and minimum relative displacement. Moreover the slider itself can support more vertical loads with limited working areas.
机译:地震隔离是用于建筑物,桥梁和其他结构以及非结构部件的地震防护技术之一。在隔震技术中,新开发的滚子轴承系统可确保上部结构的恒定和低加速度,并调节轴承位移。但是,由于接触面积有限,为了承受较大的垂直力,滚子的尺寸必须较大。为了克服这个问题,本文将使用特殊的滑块来代替滚筒。该滑动轴承将具有与滚动轴承相同的动态性能,并支撑相当大的重量。滑动表面与两种具有不同摩擦系数的材料组合在一起,因此滑动轴承可以提供理想的摩擦系数以消散地震能量,同时最大程度地减少轴承的位移。通过实验研究来分析此滑动轴承系统的单向热机械性能。实验是使用布法罗大学结构工程与地震模拟实验室(SEESL)的振动台进行的。四个滑动轴承用于支撑混凝土质量,作为桌子上的上部结构。选定的地震记录用作地面激励。测量了工作台和上部结构的加速度,以及工作台和上部结构之间的相对位移。;这里提出的理论和实验研究都表明该滑动轴承系统具有巨大的潜力。这种隔震滑动轴承的动态性能实际上与滚动轴承相同,从而确保了较低的加速度和最小的相对位移。此外,滑块本身可以在有限的工作区域内承受更多的垂直载荷。

著录项

  • 作者

    Abraham, Nijo Alexander.;

  • 作者单位

    State University of New York at Buffalo.;

  • 授予单位 State University of New York at Buffalo.;
  • 学科 Engineering Civil.;Engineering Mechanical.
  • 学位 M.S.
  • 年度 2009
  • 页码 127 p.
  • 总页数 127
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;机械、仪表工业;
  • 关键词

  • 入库时间 2022-08-17 11:38:30

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