期刊文献+

基于近断层地震LRB桥梁支座屈服力优化 被引量:4

Optimum yield strength of LRB for isolated bridges under near-fault earthquake
下载PDF
导出
摘要 在近断层地震作用下,LRB桥梁的响应较大,为了降低LRB支座相对位移过大给桥梁结构带来的不利影响,对LRB支座的屈服力进行了优化研究。选用了典型的近断层地震波,对具有不同力学特性和支座参数的LRB桥梁进行了考虑隔震支座非线性的地震时程分析。根据LRB桥梁的响应结果,提出了以桥面加速度、墩顶位移、支座相对位移和铅芯直径为变量的LRB桥梁的整体响应函数。通过研究发现,可以优化LRB的屈服力,使得桥梁的整体响应降低,且支座的最优屈服力与桥墩频率相关。 Large responses usually appear on isolated bridges with LRB(Lead-Rubber-Bearings) under near-fault earthquake and the isolated bridge may perform poorly because of excessively large deformation of LRB,so it is necessary to study the optimum yield strength of LRB.For this purpose,non-linear time history analyses in accordance with different mechanical properties and bearing parameters of isolated bridges were performed.According to the results of LRB bridge's responses,the system response function with acceleration of deck,displacement of pier top,displacement of LRB and dimension of lead diameter as variables were derivated.It is found that there is an optimum yield force of LRB which makes the bridge's response to be relatively small,and the optimum yield strength of LRB is related with pier's natural frequency.
出处 《振动与冲击》 EI CSCD 北大核心 2011年第6期134-138,共5页 Journal of Vibration and Shock
基金 湖北省自然科学基金项目(2009CDB418)
关键词 近断层地震 LRB桥梁 整体响应函数 屈服力优化 near-fault earthquake isolated bridge system response function yield strength optimziation
  • 相关文献

参考文献14

  • 1Buckle I C, Mayes R L. Seismic isolation: History, application and performance a world view [ J ]. Earthquake Spectra, 1990, 6(2): 161-201. 被引量:1
  • 2唐家祥 刘再华.建筑结构基础隔震[M].武汉:华中理工大学出版社,1993.. 被引量:81
  • 3Skinner R I, Robinson W H, McVerry G H. An introduction to seismic isolation[ M]. NY: John Wiley & Sons, 1999. 被引量:1
  • 4Imbsen R A. Use of isolation for retrofitting bridge [ J ]. J Bridge Eng ASCE, 2001, 6(6) :425 -438. 被引量:1
  • 5Bessason B, Haflidason E. Recorded and numerical strong motion response of a base-isolation bridge [ J ]. Earthquake Spectra, 2004,2 : 309 - 332. 被引量:1
  • 6Heaton T H, Hall J F, Wald D J, et al. Response of high- rise and base-isolated building to a hypothetical MW 7. 0 blind Trust earthquake[ J ]. Science, 1995,267 : 206 - 211. 被引量:1
  • 7Hall J F, Heaton T H, Halling M W, et al. Near-source ground motion and its effects on flexible building I J ]. Earthquake Spectra, 1995, 11:596 - 605. 被引量:1
  • 8Dilclei M, Baddaram S. Effect of isolator and ground motion characteristics on the performance of semic-isolated bridges [J]. Earthquake Eng Struc Dyn, 2006, 35:233-250. 被引量:1
  • 9Jangid R S. Optimal lead-rubber isolation bearings for near- fault motions[ J ]. Eng Struct, 2007, 29 : 2503 - 2513. 被引量:1
  • 10Zhang J, Huo Y L. Evaluating effectiveness and optimum design of isolation devices for higway bridge using the fragility function method [ J ]. Eng Struct,2009,31 : 1648 - 1660. 被引量:1

二级参考文献15

共引文献138

同被引文献92

引证文献4

二级引证文献98

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部