连续梁桥毕业论文摘要

《连续梁桥毕业论文摘要》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、青岛理工大学毕业设计摘要本次设计的题目是江苏227省道三期工程罗泉大桥。设计采用预应力混凝土箱型梁桥，跨径布置为（3×30）m，双向六车道；主梁为等截面单箱单室箱型梁，梁高为2.0m；采用支架现浇施工。本文主要阐述了该桥的上部结构的设计和计算过程。首先对主桥进行总体结构设计，拟定上部结构尺寸，然后对上部结构进行恒载和活载内力计算，内力组合，预应力钢束的估算和布置及预应力损失计算，再进行截面强度、应力验算，最后进行变形验算。具体包括以下几个部分：桥梁结构布置；截面结构各部分尺寸拟定；主梁作用效应计算；预应力钢束的估算及布置；预应力损失及有效预应力计算；截面强度验算；抗裂验

2、算；持久状况构件的应力验算；挠度验算。关键词：预应力混凝土连续梁桥，箱形梁，作用，应力，预拱度青岛理工大学毕业设计ABSTRACTThesubjectofthedesignistheLuoQuanBridgewhichisthethird-phaseprojectofTheJiangSuprovincialroad227.Thisdesignusestheprestressedconcreteboxgirderbridge.Thespanarrangementis（3×30）m,two-waysixlanes.Thesuperstructureissingleboxsi

3、ngleroomnon-equalboxbeam.Theheightofthebeamis2m.Theconstructiontechnologyadoptsthewayofpreparingtheboxgirdersandbecomingcontinuousgirders.Thisessayfocusesonthedesignandcalculationprocessofthesuperstructure.Firstly,makeanoverallstructuredesignofthemainspanandstudyoutsuperstructure’ssize.S

4、econdlyperformthecalculationoftheinternalforceandreinforcingbaronthesuperstructure.Thirdly,checktheintensity,stress.Finally,checkthedeflection.Themainpointsofthedesignareasthefollows:Thearrangementofthebridgelayout;Theprotocolofthesuperstructure’ssize;Thecalculationoftheinternalforce;The

5、arrangementofprestressedreinforcingbar;Thecalculationoftheprestressedloss;Thecheckofthesectionintensity;Thecheckoftheresistingofcrack;Thecheckofthesectionstress;Thecheckofthedeflection.KEYWORDS:prestressedconcretecontinuousbridge,boxgirder,action,stress,camber