摘要
研究目的:随着我国西部艰险山区铁路的修建,高墩大跨桥梁的兴起,开展地震区高墩铁路桥梁减震技术研究具有重要意义。本文旨在总结我国高墩铁路桥梁的发展概况,综述铁路桥梁减震技术的原理及工程措施,展望高墩铁路桥梁的发展趋势,为铁路桥梁的减震控制提供建议。研究结论:(1)高墩铁路桥梁常为非规则桥梁,现行桥梁抗震设计规范不适用于这类结构,需开展新的规范研究;(2)轨道约束增加了相邻桥跨间的纵向联系,对相邻墩高相差较大的铁路桥梁,有利于整体抗震,但同时应开展地震后轨道变形对桥梁减隔震的影响研究;(3)附加减震耗能装置比较适合高墩铁路桥梁,应根据具体情况分析确定减震装置的参数及其布置;(4)参考被动耗能技术已在高耸建筑物抗震中的成功应用,可开展被动耗能减震技术在高墩桥梁中的应用;(5)主动、半主动、混合控制技术的应用具有较大发展前景;(6)本研究结果可为高墩铁路桥梁减震研究提供参考。
Research purposes： With large - scale railway construction in complicated geographical mountainous areas inwest China, thousands of large -span bridges with high -pier have been built. It is significant to conduct research onseismic control of high pier railway bridge in earthquake zone. The development of China＇ s high pier railway bridge wassummarized, the main principles and measures of seismic control of railway bridge were reviewed. The developmenttrends of high pier railway bridge were discussed. Some references for damping control of high pier railway bridge wereprovided.Research conclusions： （ 1 ） The high pier railway bridge belongs to irregular structure. Current codes for seismic designdo not apply to this type of bridge structure, thus, new researches need to be carried out. （2） Rail restraints increasethe longitudinal contact of the adjacent bridge span, so it is beneficial to overall seismic for adjacent pier height with alarge difference. Track deformation effect on bridge seismic when the earthquake strikes should be carried out. （3） It issuitable for high pier railway bridge to adopt additional damping devices. It is better to determine the parameters andarrangements of the damping devices according to the specific analysis. （4） According to the successful application ofpassive energy dissipation system in tall buildings, it is possible to introduce passive energy dissipation system to highpier bridge. （5） Active/semi - active/ hybrid control technology has great development prospects. （6） The researchresults can provide the references for the study of seismic control of high pier railway bridge.
出处
《铁道工程学报》
EI
北大核心
2016年第6期72-76,87,共6页
Journal of Railway Engineering Society
关键词
高墩
铁路桥梁
轨道约束
减震技术
被动耗能
high pier
railway bridge
rail restraint
seismic control
passive energy dissipation
