悬索桥设计计算书.docx
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哈尔滨工业大学毕业设计(论文)
摘要
自锚式悬索桥作为一种特殊悬索桥桥型,在沉寂了多年之后,现在又重新引起工程界的兴趣。它保留了传统的悬索桥桥型,以其优美的外形受到工程师们的青睐。但此种桥型结构复杂,国内外对其研究的资料和成果也很少。本文主要是对一座中等跨度的正在施工中的混凝土自锚式悬索桥—抚顺
万新桥进行设计和计算分析。
1.理想索力的计算。悬索桥一般要求恒载作用下索力均匀,这样弯矩和剪力就分布均匀。此桥主塔采用滑动索鞍以及有一定的预偏量,所以桥塔在恒载作用下不受弯,调索时只需控制主梁的弯矩。使主梁弯矩尽量上下均
匀,可得吊索的理想索力。
2.主梁的计算。自锚式悬索桥是将主缆直接锚固于加劲梁的两端,所
以求得的主梁的轴力很大,主梁的纵向只需配置普通钢筋。
3.桥面板的计算。桥面板为双向板,按双向板求内力配筋。
关键词混凝土,自锚式,悬索桥,设计
哈尔滨工业大学毕业设计(论文)
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Abstract
Asaparticularkindofsuspensionbridge,self-anchoredsuspensionbridgehasmadeanappearanceinfieldofengineeringafteryearsdreariness.Preservingshapeoftraditionalsuspensionbridge,itcausestheengineersfavorbyitselegantfigure.Howener,duetocomplexityofitsstructure,therearelittleresearchdataorachievementathomeandabroad.Thispaperhasputemphasisondesignandcomputationalanalysistoamiddle-spanconcreteself-anchored
suspensionbridgeinconstruction—FuShunWanXinBridgearedone.
1.Calculationofthereasonalforceofcable.Thesuspensionbridgeiscommonlyrequiredtheforceofcableareuniformitywhenthedeadloadactedonthebridge.Thentheshearandbendingmomentwilldistributeuniformly.Thetowerofthisbridgeadoptsaslipingsaddleandtherearesomedeclinations.Thereforethebridgetowerdoesnthasbendingmomentwhenthedeadloadactedonthebridge.Whenweadjusttheforceofthecable,wejustneedcontrolthebendingmomentofthegirder.Ifthedistributionofthegirderbending
momentisuniformly,theforceofthecableisthereasonalforceofcable.
2.Calculationofgirder.self-anchoredsuspensionbridge,thecableanchoredatthetwoendsofthegirderdirectly,sotheaxial-forceofthegirderisverygreat
Thereforethegirderonlyneedordinaryreinforcingbar.
3.Calculationofdeckslab.Thedeckslabistwo-wayslab,woneed
calculatethedeckslabaccordingtothetwo-wayslab.
Keywordsco