第42卷第4期2023年4月Vol.42No.4Apr.2023重庆交通大学学报(自然科学版)JOURNALOFCHONGQINGJIAOTONGUNIVERSITY(NATURALSCIENCE)DOI:10.3969/j.issn.1674-0696.2023.04.03广义李特公式在700m钢管混凝土拱桥试设计中的应用周水兴1,王鹏彳,宋功谭1,张敏1(1.重庆交通大学土木工程学院，重庆400074；2.中交公路规划设计院有限公司贵州分公司，贵州贵阳550003)摘要:大跨度钢管混凝土拱桥常采用变截面拱肋,以满足受力需要。围绕钢管拱肋变截面高度设计,在李特公式基础上推导了广义李特公式，将其应用于一座700m跨钢管混凝土拱桥试设计中，开展了不同抛物线次数下钢管拱内力、弹性稳定、动力特性及主拱刚度的计算.分析结果表明:主要参数均能满足规范要求;相比于李特公式,釆用广义李特公式设计的变截面钢管拱,由于减小了拱脚截面负弯矩，使截面上、下弦管的轴向力分布更趋均匀。关键词:桥梁工程;钢管混凝土拱桥;李特公式;广义李特公式;变截面高度;试设计中图分类号:U442.54文献标志码:A文章编号:1674-0696(2023)04-021-06ApplicationofGeneralizedRitterFormulainTrialDesignof700mConcreteFilledSteelTubularArchBridgeZHOUShuixing1,WANGPeng2,SONGGongtan1,ZHANGMin1(1.SchoolofCivilEngineering,ChongqingJiaotongUniversity,Chongqing400074,China;2.GuizhouBranchofCCCCHighwayPlanningandDesignInstituteCo.,Ltd.,Guiyang550003,Guizhou,China)Abstract：Variablesectionarchribsareoftenusedinlong-spanconcretefilledsteeltubular(CFST)archbridgetomeetthemechanicsdemands.Focusingonthevariablesectionheightdesignofsteeltubearchrib,thegeneralizedRitterformulawasderivedbasedontheRitterformula,whichwasappliedtothetrialdesignofa700mspanconcretefilledsteeltubearchbridge.Theinternalforces>elasticstability,dynamiccharacteristicsandmainarchstiffnessofsteeltubearchunderdifferentparabolatimeswerecalculatecLTheanalysisresultsshowthatallthemainparameterscanmeetthespecificationrequirements.ComparedwiththeRitterformula,thevariablesectionsteeltubearchdesignedbythegeneralizedRitterformulamakestheaxialforcedistributionoftheupperandlowerchordsmoreuniform,becausethenegativebendingmomentofthearchfootsectionisreduced.Keywords：bridgeengineering；concretefilledsteeltubulararchbridge;Ritterformula;gene...
