公路工程
公路工程
공로공정
JOURNAL OF HIGHWAY ENGINEERING
2014年
6期
247-249,325
,共4页
冲刷计算%拱桥垮塌%基础沉降%有限元分析
遲刷計算%拱橋垮塌%基礎沉降%有限元分析
충쇄계산%공교과탑%기출침강%유한원분석
scouring calculation%collapsed arch bridge%foundation settlement%the finite element analysis
众所周知,多数圬工拱桥结构的破坏都是由于其下部基础的沉降、变位等原因引发的。但具体的基础变形量计算方法及其对上部结构的影响程度并没有被人们详细研究,这里对发生垮塌事故的北方地区某三跨乱石拱桥进行分析。根据现场勘测数据进行桥位处水文、冲刷计算,确定1#桥墩基础的沉降量及变形量,并借助 MI-DAS/CIVIL有限元计算软件模拟这种基础变位对上部主拱圈结构的影响程度,得出了导致该桥坍塌的根本原因。可为类似桥梁工程的养护管理及事故鉴定等提供思路和参考。
衆所週知,多數杇工拱橋結構的破壞都是由于其下部基礎的沉降、變位等原因引髮的。但具體的基礎變形量計算方法及其對上部結構的影響程度併沒有被人們詳細研究,這裏對髮生垮塌事故的北方地區某三跨亂石拱橋進行分析。根據現場勘測數據進行橋位處水文、遲刷計算,確定1#橋墩基礎的沉降量及變形量,併藉助 MI-DAS/CIVIL有限元計算軟件模擬這種基礎變位對上部主拱圈結構的影響程度,得齣瞭導緻該橋坍塌的根本原因。可為類似橋樑工程的養護管理及事故鑒定等提供思路和參攷。
음소주지,다수오공공교결구적파배도시유우기하부기출적침강、변위등원인인발적。단구체적기출변형량계산방법급기대상부결구적영향정도병몰유피인문상세연구,저리대발생과탑사고적북방지구모삼과란석공교진행분석。근거현장감측수거진행교위처수문、충쇄계산,학정1#교돈기출적침강량급변형량,병차조 MI-DAS/CIVIL유한원계산연건모의저충기출변위대상부주공권결구적영향정도,득출료도치해교담탑적근본원인。가위유사교량공정적양호관리급사고감정등제공사로화삼고。
It is well known that most structural damage of the masonry arch bridge is due to the settlement and displacement in its lower base.But the specific foundation deformation calculation method and its influence of the upper structure has not been researched in detail.Here is the cause analysis of collapse accident of a three span bridge in the northern region.Based on the field survey data,we do hy-drology and erosion calculation at the bridge site,determine the foundation settlement and deformation of the first bridge pier.And with the help of MIDAS/CIVIL finite element software,we simulate the effect of the foundation displacement on the upper main arch ring structure and conclude the primary cause of the collapsed bridge.It provides ideas for the maintenance management and accident identification of similar bridges.