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1、湖南科技大学桥梁工程毕业设计(论文)摘要本设计为如海河桥主桥上部结构,本桥主跨度是33m+55m+33m,主梁截面为单箱三室,拱肋为钢管混凝土结构,吊杆为柔性吊杆。悬臂桥施工方法用平衡悬臂施工,拱肋钢管采用分段吊装方式施工。设计荷载为公路-Ⅰ级,设计抗震烈度7度。主桥上部结构计算按施工阶段采用“桥梁博士V3.0”进行计算,结合工程实际情况,施工计算共分了39个受力阶段。设计中主桥按先边跨合拢,然后中跨合拢的顺序考虑,合拢温度严格控制在15~16℃。拟定主梁纵、横断面尺寸;采用桥梁博士结构设计程序计算施工阶段和
2、成桥后的主梁各控制截面的恒载内力、活载内力、温度内力及基础沉降引起的内力,分别按承载能力极限状态和正常使用极限状态进行荷载效应组合;估算预应力钢束数量并确定束数;布置钢束位置;对各控制截面进行强度、应力验算,各项验算均满足《公路钢筋混凝土及预应力混凝土桥涵设计规范》要求。关键词:预应力混凝土梁拱组合桥;悬臂浇注施工;分段吊装施工;吊杆;作用效应组合;桥梁博士;Q765978417AbstractThedesignisfortheRu-Hai-Hebridgetopsidestructurethespanofw
3、hichis33m+55m+33m.andthesectionissingleboxgirdercross-sectionofthreerooms,ribofsteelconcretestructure,flexibleboom.ThecantileverbridgeusethemethodofBalancedCantileverconstruction,Archsteelconstructionwithsub-liftingmeans.Asaresultofthedesignloadforone,weuse
4、sevenforsecurity.Calculationofthemainbridgestructureusedbytheconstructionphase,"Dr.BridgesV3.0"calculated,combinedwiththeactualsituationintheproject,constructionofthecalculationisdividedinto39bythepowerstage.Thedesignofthebridgebythefirstsideofthemaincross-
5、fold,aftertheliftingoftheinterimanchor,thelastinordertoconsidercross-fold,closeuptostrictlycontrolthetemperatureinthe15~16℃.Thedevelopmentofthemainlongitudinalbeams,cross-sectionalsize;theuseofthestructuraldesignofthebridge,Dr.calculatedintotheconstructionp
6、haseandafterthebridgegirdercross-sectionofthecontrolofinternalforcesofthedeadload,liveloadinternalforces,temperature,andthebasisforthesettlementofinternalforcescausedbyinternalforces,respectively,accordingtocarryingcapacitylimitstateandserviceabilitylimitst
7、ateloadcombinationeffects;toestimatethenumberofpre-stressedbeamofsteelandtodeterminethenumberofbeam;layoutsteelbeamposition;cross-sectionofthecontrolstrength,stresscheck,thecheckaretomeetthe"HighwayofreinforcedconcreteandprestressedConcreteBridgeDesignCode"
8、requirements.Keywords:Prestressedconcretebeamarchcombinationbridge;cantileverconstructionpouring;BreakErection;Tensioning;portfolioeffect;BridgeDr.Q765978417湖南科技大学潇湘学院本科生毕业设计(论文)目录第一章前言1第二章概述22.1设计依据及标