空腹式拱桥设计

成都理工大学工程技术学院毕业论文四川荣县旭水大桥空腹式拱桥设计作者姓名：张晋玮专业名称：土木工程指导教师：王刚讲师成都理工大学工程技术学院学位论文诚信承诺书本人慎重承诺和声明：1.本人已认真学习《学位论文作假行为处理办法》（中华人民共和国教育部第34号令）、《成都理工大学工程技术学院学位论文作假行为处理实施细则（试行）》（成理工教发〔2013〕30号）文件并已知晓教育部、学院对论文作假行为处理的有关规定，知晓论文作假可能导致作假者被取消学位申请资格、注销学位证书、开除学籍甚至被追究法律责任等后果。2.本人已认真学习《成都理工大学工程技术学院毕业设计指导手册》，已知晓学院对论文撰写的内容和格式要求。3.本人所提交的学位论文（题目：四川荣县旭水大桥空腹式拱桥设计），是在指导教师指导下独立完成，本人对该论文的真实性、原创性负责。若论文按有关程序调查后被认定存在作假行为，本人自行承担相应的后果。承诺人（学生签名）：20年月日四川荣县旭水大桥空腹式拱桥设计-I-摘要拱桥是我国最常用的一种桥梁型式，其式样之多，数量之大，为各种桥型之冠，特别是公路桥梁，据不完全统计，我国的公路桥中7%为拱桥。本桥是单跨的，净跨径为80m等截面悬链线拱桥。采用空腹式拱上结构，在主拱上侧布置立柱，主拱圈为等截面钢筋混凝土箱型截面。本设计主要包括两方面：一是全桥方案的设计。包括：拱圈、立柱、承台、桥面板及桥面铺装层的材料及尺寸的确定；拱圈几何力学性质的计算；拱轴系数的确定；主桥设计计算。其中主桥设计计算主要包括相关参数的计算、恒载内力计算、活载内力计算、温度变化和混凝土收缩引起的内力计算。二是拱圈整体“强度—稳定”验算，全桥方案设计的验算包括：主拱圈截面强度验算、整体“强度—稳定”验算、拱圈整体“强度—稳定”验算、拱脚直接抗剪强度验算。关键词：拱桥箱型拱内力强度稳定性四川荣县旭水大桥空腹式拱桥设计-II-AbstractArchbridgeisoneofthemostcommonlyusedbridgetypeinourcoun-try,thestyleofthegreatnumberofthem,forallkindsofbridge,hightwayBridges,inparticular,accordingtoincompletestatistics,7%ofChina'shighwaybridgearchbridge.Thisisasinglespanbridge,crosssectionsuchasnetspanof80mcatenaryhingelessarcharchbridge.Usinghollowtypeonthearchstructure,decoirateinthemainarchupperpillar,themainarchringforthesectionofreinforcedconcreteboxsection,etc.Thisdesignmainlyincludestwoaspects:Oneisthedesignofthewholebridge.Including:archring,column,pilecaps,bridgepanelandbridgedeckpavementmaterialsandthedeterminationofsize;Calculatingarchringgeometricalandmechanicalproperties.Thedeterminationofthearchaxiscoefficient;Maindesigncalculation.Themaindesignmainlyincludesthecalculationofrelevantparameters,deadload,liveloadinternalforcecalculation,internalforcecalculationtemperaturevariationandconcreteshrinkagecausedbyinternalforcecalculation.Second,thearchringtheoverallstrenrgth-stabilitycalculation,calculatingthewholebridgedesignincludes:mainarchringsectionofintensity,overallstrength-stabilitycalculation,archringstrength-stabilitycalculation,thearchfootdirectshearstrengthcalculation.Keywords:archbridge,boxarch,force,strength,stability四川荣县旭水大桥空腹式拱桥设计-III-目录摘要................................................................................................................IAbstract.........................................................................................................II目录..............................................................................................................III前言................................................................................................................11设计资料....................................................................................................22拱圈力学性质............................................................................................33确定拱轴系数............................................................................................63.1立墙及以上结构自重对l/4跨、拱脚的弯矩................................63.1.1立墙位置....................................................................................63.1.2立墙处y1计算...........................................................................73.1.3/costy中间插入值计算.........................................................73.1.4立墙及墙帽高度计算................................................................73.1.5拱上建筑自重及其对l/4跨、拱脚弯矩..................................73.2拱圈半拱悬臂自重作用下，1/4跨和拱脚的剪力与弯矩............93.3验算拱轴系数..................................................................................93.4不计弹性压缩的拱自重水平推力Hg′............................................93.5弹性中心位置、弹性压缩系数和自重弹性压缩水平推力........104主桥设计计算..........................................................................................114.1自重效应........................................................................................114.1.1拱顶截面..................................................................................114.1.2拱脚截面..................................................................................114.2公路－II级汽车荷载效应............................................................124.2.1汽车荷载冲击力......................................................................124.2.2拱顶截面..................................................................................134.2.3拱脚截面..................................................................................154.2.4拱顶、拱脚截面汽车效应标准值汇总..................................17四川荣县旭水大桥空腹式拱桥设计-IV-4.3人群荷载效应................................................................................184.4温度作用效应................................................................................194.4.1拱顶截面..................................................................................204.4.2拱脚截面..................................................................................214.5混凝土收缩效应............................................................................215拱的验算所用荷载效应..........................................................................235.1拱的整体“强度——稳定”验算用荷载效应................................235.2拱脚截面直接抗剪强度验算用荷载效应....................................255.2.1自重剪力.......................................