• Title/Summary/Keyword: 납고무받침

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Guidelines of Designing Lead Rubber Bearing for a Cable-Stayed Bridge In Control Seismic Response (사장교의 지진 응답 제어를 위한 납고무 받침의 설계 기준 제안)

  • 이성진;박규식;김춘호;이인원
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2003.10a
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    • pp.509-516
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    • 2003
  • In tile design of base isolation system for building and short-span bridge, shift of the natural period of the structure is main objective. But, most long-span bridges such as a cable-stayed bridges have a number of long-period modes due to their flexibility and small structural damping. thus the design concept of base isolation system for building and short-span brigde may be difficult to use directly to these structures. However, the effectiveness of LRB for cable-stayed bridges is indicated by Ali and Abdel-Ghaffar. In this study, the design procedure and guidelines of LRB for a seismically excited cable-stayed bridge are investigated. The design properties of LRB are chosen that the design index(DI) is minimized or little changed for variation of properties. This result show that the stiffer rubber and bigger lead core size are need to cable-stayed bridges. And the seismic performance of designed LRB is also investigated. The consequences show that the perforamnce of designed LRB is better than that of Naeim-Kelly mettled designning LRB for general building structures. Moreover, the design properties of LRB are researched to several diffrent dominant frequency of earthquake. The results present that the plastic and elastic stiffness of LRB are affected by the dominant frequency of earthquake.

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