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1、第33卷第2期河南理工大學(xué)學(xué)報(bào)(自然科學(xué)版)V01.33NO.22014年4月JOURNALOFHENANP0LYTECHNICUNIVERSITY(NATURALSCIENCE)Apr.2014大跨度上承式拱橋施工監(jiān)控技術(shù)王一新一,姚小平,孫榮玲(1.河南理工大學(xué)土木工程學(xué)院河南焦作454000;2.天津大學(xué)建工學(xué)院天津300072;3.河南工業(yè)和信息化職業(yè)學(xué)院,河南焦作454000)摘要:大跨度上承式拱橋的結(jié)構(gòu)復(fù)雜,施工難度大,為保證橋梁施工安全,必須制定合理的施工監(jiān)控方案.以大同市御河橋?yàn)檠芯繉ο?,選
2、擇了7個應(yīng)力監(jiān)測斷面和56個應(yīng)變監(jiān)測點(diǎn)模擬進(jìn)行橋梁應(yīng)力及應(yīng)變的監(jiān)測,并用有限元理論,模擬了該橋在l0個特定工況條件下的受力及變形,分析顯示模擬結(jié)果與實(shí)際情況較為接近.結(jié)果表明,御河大橋的監(jiān)測斷面及監(jiān)測點(diǎn)選擇合理,模擬方法合適,御河大橋的監(jiān)測方案可為其他相似形式橋梁的施工監(jiān)測提供借鑒.關(guān)鍵詞:上承式拱橋;施工監(jiān)控;有限元分析;應(yīng)力監(jiān)測;位移監(jiān)測中圖分類號:U446.3文獻(xiàn)標(biāo)識碼:A文章編號:1673·9787(2014)02—0232—07Researchonconstructionmonitoringofl
3、ong·-spandeck·-typearchbridgeWANGYi.xin一,YAOXiao—ping,SUNRong—ling(1.SchoolofCivilEngineering,HenanPolytechnicUniversity,Jiaozuo454000,Henan,China;2.SchoolofCivilEngineering,TianjinUniversi—ty,Tianfin300072,China;3.HeartCollegeofIndustry&InformationTechnol
4、ogy,Jiaozuo454000,Henan,China)Abstract:Itishardtoconstructalong—spandeck—typearchbridgeforitscomplexstructure.Inordertoensuretheconstructionsafety,theconstructionmonitoringofalong—spandeck—typearchbridgeismoreimportantthanthatofothertype.TheYuRiverbridgein
5、Datongcitywaschosenasthesubjectinvestigated.Stressno·nitoringandpositionmonitoringwereperformedin7monitoringsectionsand56measuringpoints,andfiniteelementanalysiswasusedtosimulatethestressanddeformationofthebridgein10workconditions.There-sultofsimulationagr
6、eedwiththetruecondition.ThechoiceofmonitoringsectionsandmeasuringpointswasreasonableforYuRiverbridge,andthewayofsimulationwasappropriate.Thusly,itcanprovideareferencefortheconstructionmonitoringofothersimilarbridges.Keywords:deck·typearchbridge;constructio
7、nmonitoring;finiteelementanalysis;stressmonitoring;posi—tionmonitoring.下橋梁各個構(gòu)件的內(nèi)力、應(yīng)力和變形值,以此來對0引言某個工程情況的安全性進(jìn)行評估,并以此來安排大跨度橋梁的施工控制是一個預(yù)告一施工一下一個環(huán)節(jié)的施工工作?.上承式拱橋結(jié)構(gòu)復(fù)測量一識別一修正一預(yù)告一施工的循環(huán)過程.在雜,施工工藝特殊,施工過程中橋梁的受力及變形橋梁施工過程中,通過監(jiān)測重點(diǎn)位置或重點(diǎn)斷面復(fù)雜,施工監(jiān)測的難度較大.主要原因在于難以確的應(yīng)力、位移及溫度等,對橋梁
8、的受力變形有影響定能反映大跨度上承式拱橋在施工過程中的受力的因素來模擬橋梁施工過程中各個工程情況條件與變形的有代表性的監(jiān)測位置和監(jiān)測斷面,并通收稿日期:2013.11.24基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目(51108161);2009年度河南省科技計(jì)劃項(xiàng)目(092400440083)作者簡介:王一新(198O一),男,河南焦作人,博士生,講師,主要從事工程項(xiàng)目管理方面的研究工作E-mail:wyx@hpu.ed