大跨度钢拱桥构件评级体系研究.pdf

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1、桥梁建设２０１７年第４７卷第４期（总第２４５期）８４BridgeConstruction，Vol．４７，No．４，２０１７（TotallyNo．２４５）文章编号：１００３－４７２２（２０１７）０４－００８４－０６大跨度钢拱桥构件评级体系研究１，２１１１苏成，廖威，秦帆，黄建靖（１．华南理工大学土木与交通学院，广东广州５１０６４０；２．华南理工大学亚热带建筑科学国家重点实验室，广东广州５１０６４０）摘要：为对大跨度钢拱桥构件制定合理的检查和养护策略，根据该类桥梁的特点开展构件评级体系研究。从安全性和耐久性２个角度对构件进行评级，构建多个安全性和耐久性因子，对安全性和耐久

2、性因子的分析结果设置一个评分标准，采用层次分析法确定各因子的权重，计算构件的安全性和耐久性综合得分，据此建立构件评级矩阵，并制定适当的桥梁构件检查和养护策略。采用该构件评级体系对广州新光大桥进行构件评级，结果显示，该桥主跨桥面横梁的安全性等级偏低，边、主跨吊杆的耐久性等级也偏低，在制定检查周期和养护策略时，应重点关注这几类构件。关键词：钢拱桥；构件评级；安全性；耐久性；承载能力；疲劳寿命；检查周期；养护策略中图分类号：U４４８．２２；U４４５．７文献标志码：AResearchofRatingSystemforComponentsofLongSpanSteelArchB

3、ridges１，２１１１SUCheng，LIAOWei，QINFan，HUANGJianjing（１．SchoolofCivilEngineeringandTransportation，SouthChinaUniversityofTechnology，Guangzhou５１０６４０，China；２．StateKeyLaboratoryofSubtropicalBuildingScience，SouthChinaUniversityofTechnology，Guangzhou５１０６４０，China）Abstract：Forthepurposeofformulating

4、thereasonableinspectionperiodsandmaintenancestrategyforthecomponentsoflongspansteelarchbridges，theresearchoftheratingsystemforthecomponentswascarriedoutinthelightofthecharacteristicsofthebridges．Fromthe２aspectsofthesafetyanddurability，thecomponentswererated，themultiplesafetyanddurabilit

5、yfactorswerebuiltupandaratingscorecriterionfortheanalysisofthefactorswasestablished．Theweightofthedifferentfactorswasdetermined，usingtheanalytichierarchyprocess．Thecompre‐hensiveratingscoresofthesafetyanddurabilityofthecomponentswerecalculatedandaccordingtothecalculatedscores，theratingm

6、atrixforthecomponentswascreatedandtheappropriatein‐spectionperiodsandmaintenancestrategyforthecomponentswereworkedout．Withthere‐searchedratingsystemherewith，thecomponentsoftheXingguangBridgeinGuangzhouwerera‐ted．Theresultsyieldthatthesafetyratingofthefloorbeamsofthemainspanofthebridgeis

7、abitlowandthedurabilityratingofthehangersofthesideandmainspansisalsolow．Itishenceclaimedthatwhentheinspectionperiodsandmaintenancestrategyareformulated，attentionshouldbespeciallypaidtothecomponentsofsuchtype．Keywords：steelarchbridge；ratingofcomponent；safety；durability；bearingca