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UGGs Outlet 桥梁结构

 
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PostPosted: Sun 20:51, 09 Jan 2011    Post subject: UGGs Outlet 桥梁结构

桥梁结构的损伤识别研究
o技术。采用全局收敛优化算法的完全非线性反演方法.在数据误差条件下显示出较强的抗噪能力。总之,基于振动的损伤识别方法利用损伤前后结构动态特性的变化来诊断结构的损伤。其优点是可将振动的外界因素作为激励源,损伤检测的过程不影响结构的正常使用,能方便地完成结构损伤的检测和识别。除了整体检测的优点外。对于桥梁等大型土木工程结构。可以利用环境激励引起的结构振动来对结构进行检测,从而实现实时监测。COMMUNICATIONSSTANDARDIZATIONISSUENo.156·公路工曩与运辊阿囱嗣国锄回徐保友,[link widoczny dla zalogowanych],郑万新,冯淑美(山东省高唐公路管理局.山东聊城252800)摘要:沙河沟桥是山东聊城首座采用锚喷混凝土加固的双曲拱桥。通过对沙河沟桥的加固设计及施工.并与同类桥梁进行经济效益的比较分析,证明采用锚喷混凝土技术加固桥梁是比较经济的,而且其还具有施工快速简便、可不中断交通的优势,值得大力推广。关键词:沙河沟桥;锚喷混凝土技术;桥梁加固中图分类号:U445.72文献标识码:B文章编号:1002--4786(2006)08-0025—02ReinforcingofShahegouBridgeXUBao-you,[link widoczny dla zalogowanych],ZHENGWan-xin,FENGShu-mei(ShandongProvincialGao-tangHighwayAdministrationBureau,Liaocheng252800,China)Abstract:ShahegoubridgeisadoublearchbridgeinShandongLiaochengcitythatfirstlyuseanchorspraycementconcretetoreinforce.WithreinforcedesignandconstructionofShahegoubridgeandcomparingeconomicbenefitswithotherbridges,itprovesthatitiseconomicalmethodthatusesanchorspraycementconcretetoreinforcebridge,itsconstructionisquicklyandeasily,andtrafficisno—bread,[link widoczny dla zalogowanych],thereforeitworthbeingextended.Keywords:Shahegoubridge;anchorspraycementconcrete,[link widoczny dla zalogowanych];bridgereinforcing随着经济的发展。公路交通量与日俱增,为保证桥梁的安全运营与使用寿命。有必要对一些旧桥进行加固维修。以提高其承载能力,适应实际通行需求,使公路运输更加安全、畅通。就此我们以旧双曲拱桥的加固为例作为本文的论述内容。1桥梁简况沙河沟桥位于山东省高唐县城西G308公路线上.桩号为I34+875,旧桥部分建于1979年,设计荷载为汽一15、挂一80。上部结构为三孑L空腹式双曲拱。每孔净跨径L。=lOre,现净矢高fo=1.75m,主拱圈横断面由5肋4波组成。拱圈宽度达7.33m.正交;桥墩为双柱式盖梁,钻孑L灌注桩基础。桥台下部与桥墩型式相同,增加了U形台身。1993年在本桥的北侧进行了加宽,并对原桥的护栏进行了改造。加宽部分设计荷载为汽一20、挂一100。2病害状况根据2003年8月山东省公路桥梁检测中心对该桥进行的检测,其被评为四类桥梁。旧桥部分整体工作状态处于损坏状态.具体表现为:a)全桥100%拱肋钢筋锈蚀。混凝土胀裂严重,[link widoczny dla zalogowanych],且局部混凝土胀裂脱落:b)1#盖梁底面局部钢筋严重
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