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当前位置:首页 > 临时分类 > 三跨(140+300+140)连续双塔钢箱梁斜拉桥设计全套(毕业设计)
I摘要桥面系为钢结构,桥塔为钢筋混凝土结构。斜拉桥很早以前就有了,到了近代发展速度十分迅猛,在现代桥梁工程实践中开始广泛应用,其特点是受力性能好、跨越能力大、轻型美观、抗震性能好。是跨越大江大河、海峡港湾等交通障碍的首选桥型。本设计以斜拉桥设计基本理论和静动力分析为理论基础,以成功修建的斜拉桥为例,根据桥梁的位置、布置形式,拟定桥梁的跨度、矢高、锚索倾角、桥塔高度和截面、塔基形式、锚碇构造等,说明选择相关参数的过程、依据、和考虑的主要因素,然后进行桥面系、拉索、桥塔、锚碇等具体尺寸设计、配筋和验算。由于斜拉桥是超静定结构,计算较为烦琐,故在该设计中,结构单元划分和内力计算采用专业设计软件MAIDAS进行,计算方法为有限元法,使设计工作量大大的简化,内力求出后,根据桥梁规范进行结构内力组合。最后,按容许应力法和极限状态法来验算主要截面,以判定设计的合理性。本设计的步骤为:根据设计任务要求,依据现行公路桥梁设计规范,综合考虑桥位的地质、地形条件,经初选后提出了斜拉桥方案、悬索桥、拱桥三个比选桥型。按“实用、经济、安全、美观”的桥梁设计原则,比较三个方案的优缺点。比选后把斜拉桥作为主推荐设计方案,进行了结构细部尺寸拟定、静活载内力计算、钢主梁应力强度、疲劳验算、斜拉桥整体稳定验算、斜拉桥整体强度应力验算、拉索应力及疲劳验算、钢主梁细部结构设计。经分析比较及验算表明该设计计算方法正确,内力分布合理,符合设计任务的要求。关键词:方案;斜拉桥;拱桥;悬索桥;主推荐设计方案;结构分析;验算。IIAbstractThesubjectisperformedinaccordingwiththebasictheoryofCablestayedbridgedynamicandstationaryanalysistheory.Thespan,maincablestowerandcablesaredesignedinlinewiththearrangementofspan.Thewaychoosetheparametersanddecisiveelementsareillustrated.Thereafter,thesizesofdecksystem,maincables,endlink,cablebands,stormsystemandanchoragesaredesigned.Asahighlyredundantsystem,itisinevitablybringsusmuchdifficultintheanalysisoftheinternalforcesbyhand.Thecomputerprogram,whichnamedMAIDASareusedincourseofcalculationinordertosimplythework.Whentheinternalstressiscarriedout,thearrangementofinternalstressisimplementedinlightofbridgespecification.Aftercheckingtheitemsrequiredinthecodefortheacross-sections,wecanknowthefeasibilityofthedesign.theprocessofdesignment:AccordingtothedesignassignmentandthepresentHighwayBridgeSpecifications,Takethegeologicalandthelandformofthebridgesiteforfurtheranalysis,afterpreliminaryselection,threebridgetypeschemasarepresented,theyareCable-stayedbridge,SuspensionbridgeandArchbridge.Comparingtheircharacterscomprehensively,theCablestayedbridgeisselectedasthemaindesignschemebythephilosophyofbridgedesignas“Practicability,Economy,Security,Beauty”.Throughdrawingupofstructure’sdimension,internalforcecalculationofdeadandlivingload,steelbeamstressandstrengthcalculation,fatiguestresscalculation,thewholebridgestrengthcalculation,checkingcomputationofcablestressandfatiguestress,livingloaddistortion,drawingupofsteelbeam’sdimension.Theconclusioncanbedrawnthatthedesignisuptotheassignment.Keyword:Design;cable-stayedbridge;Archbridge;SuspensionBridge;Steelbeam;Fitaguestress;themaindesignschemeforfurtheranalysis;Structureanalysisandcheckingcomputation.III目录第一章概述............................................................11.1、设计依据............................................................11.2、技术标准............................................................11.3、地质条件............................................................11.4、设计参数............................................................31.5、设计规范:..........................................................3第二章水文计算.........................................................52.1原始资料..............................................................52.2水文计算.............................................................5第三章桥型方案比选......................................................83.1、构思宗旨............................................................83.2、比选标准:..........................................................83.3、比选方案............................................................83.4、方案点评...........................................................103.5、方案确定:.........................................................10第四章斜拉桥构造设计...................................................114.1总体设计............................................................114.2主梁设计............................................................114.3索塔设计............................................................234.4基础设计............................................................244.5斜拉索设计..........................................................24IV4.6辅助墩基础设计......................................................254.7边跨临时压重设计....................................................254.8附属设施设计........................................................254.9、桥面铺装、排水和防水层.............................................26第五章模型建立.........................................................275.1荷载................................................................275.2计算方法概述........................................................285.3模型建立............................................................295.4模型分块............................................................295.5主梁及索塔截面特性..................................................315.6初索力计算..........................................................31第六章内力分析.........................................................336.1主梁和索塔控制断面内力和应力值......................................336.3主塔主要内力图......................................................356.4斜拉索索力............................................错误!未定义书签。6.5桥梁影响线............................................错误!未定义书签。第七章:桥梁下部结构计算.................................错误!未定义书签。7.1辅助墩墩柱设计计算...................................错误!未定义书签。7.2桥墩钻孔灌注桩设计...................................错误!未定义书签。第八章施工阶段内力分析.....................
本文标题:三跨(140+300+140)连续双塔钢箱梁斜拉桥设计全套(毕业设计)
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