延安火车站张弦梁结构隔震支座减震控制.pdf

2010年11月 施工技术 第39卷第11期 CONSTRUCTION TECHNOLOGY 21 延安火车站张弦梁结构隔震支座减震控制 梁建文 (中铁十二局集团西安北站工程指挥部，陕西西安710021) [摘要]将隔震支座引人张弦梁结构中，采用通用显式动力分析程序LS-DYNA软件对一实际工程的单榀张弦梁结 构进行隔震情况下和非隔震情况下地震响应分析，并分析了隔震支座水平刚度和阻尼大小对张弦梁结构的减震影 响，计算分析结果表明，隔震支座对张弦梁结构的减震效果比较明显，可有效应用于张弦梁结构的振动控制. [关键词]张弦梁结构；隔震；减震分析 [中图分类号]TU393.3 [文献标识码]A [文章编号]1002-8498(2010)11-0021-04 Vibration Reducing Analysis of Beam String Structure with Isolation Bearings in the Yan'an Railway Station Liang Jianwen Xi'an North Raileay Station Engineering Headquarters China Railway 12th Bureau Group Co.Ltd.Xi'an Shaanxi 710021 China) Abstract:A vibration reducing system about isolation bearings is introduced into beam string structures (BSS).The vibration control on seismic response of beam string structures with isolation bearings is discussed.Firstly finite element models for different analysis are established by using explicit dynamic analysis program LS-DYNA.Then the seismic response analysis is performed on a single beam string structure with or without seismic isolation bearings which investigate the effectiveness of isolation bearings in reducing vibration response of BSS.Furthermore parametric analysis on isolation is conducted which examine the effects of lateral stiffness and damping of isolation bearings.The analytical results indicate that the vibration reducing system can effectively reduce vibration response and can be used for controlling vibration of BSS very well. Key words:beam string structure;isolation;vibration reducing anal...