横张预应力混凝土梁受弯性能试验研究

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1、重庆交通学院硕士学位论文横张预应力混凝土梁受弯性能试验研究姓名：杨勇申请学位级别：硕士专业：结构工程指导教师：周志祥;涂凌2003.3.22重交变避攀疑鹾圭学豫论文璜强臻瘫努濑凝圭鬃受弯羧簸迷验辑竞摘要{横张颥瘴努滗菰：{：楚重庆燮添学靛褥港膝一耪裁型攒液力按术。滋冷酷在潦长高蘧公路段红槽腾大桥、徐家淘大耩等7廉横上得到成功艨髑，为进一疹究善搂强_l：鬟痰力滋凝±捺瓣浚诗理谚，驻及《裁张鞭蔽鸯湛凝±耩粱浚诗麓穗》稳关条款鹣溱涮，本文徽褥{参菏穰缀颟瘦宠溪凝主试验粱嚣试凝矮采，着耋对试验粱在张搬和鼹载阶段的藤截面受弯憾能备方面进行了分析研究a≯，零文磷

2、究熬主蘩囊褰是：l+横张矮敷凳灏凝主蘩爨强按狳蒙受举性黥魏溪试藤靛耧方法遴行势辑，并礁定横囱张拉条髂下张拉力静诗簿戳及与蔗拱廉鹃关系；2．对横向张按设磐、配件的设计进行改避姆完善，分耩横张颈威力漏凝士粱夯簸金臻蕊定盈稔逑澎式；3。横张颈疰毙濑凝土粱喾矮颈鹰力攘失靛诗舞激及旋§个除爱翡缀合；4。对横张预威力漏凝土粱猩静载和重复葡裁作用下的鼹力性能、糕前精的受力纾兔、裂缝发袋黪袋获及玻秘黪态进程了试验糖述帮分援。嚣+分瓣了影藏攒张凌空秀潺凝主粱撬鬻掰嶷获交澎靛熊懿主要鬻繁，势提蹬了穰皮的计算公戏。本文建议舱计舞公式较好鹣符合了试验结聚。6，辩横张预威力混

3、凝土梁酌羚毅弯矩计转遴行验证。对二次开裂弯瓣炭裂缝宽凌影鹋嚣素邈孬了分褥，势箍掇了獯痖豹诗冀公式。露躐黢缝采程院，鹱建议懿公式臻会程发懿辩。每，．关键调：攘张簇纛力；灌凝±粱j燕裁嚣，’魏弯瞧憝，一张按援捌j交影《器装弯楚i装缝窝凄垂塞奎望登夔塑主黧笪鲨塞——冀蹩薹塞盎鎏壅圭爨星奎墼熬茎黧变塞A懿S譬RAC謦秘#verticallytensionedprestressedeoncrete(VTP回isanew钤eofprestresstechniquethatwasinitiatedbyChongqingJiaotongUniversity．Byno

4、w,ithasbeensuccessfullyappliedtosevenbridgessuchasHongcaofangBridgeandXujiagouBridgeonYuqianexpressway．Inorder埝furtberimprovethedesigntheoryofVTPCbridgeandcompiletherelativeclausesintheCode如rDesignofVerticallyTensionedPrestressedCor．醛reteBridges．Basedonthetestedresultsfrom％enpi

5、ecesofV撩ebendingbeams,thethesisemphaticallystudiesandanalysessortieaspectsoftheflexuralPerfOrmanceatthebeam'stensioningandservingstages．Themaincontentsdiscussedinthistllesisaregeneralizedasfollows：l，Analysingthemechanicalperformanceandthecontrolmethoda±thetensioningstagethrough

6、testingandstudyingtherelationshipbetweenthetemionforceandthecamberduringthecotarseofverticaltytensioning；2．Betteringthedesignoftheverticallytentioningequipmentand螽tcings。andanalysingtherationalorientationandconfigurationoftheprestressingsteelbars；3+Discussingthecomputationofpre

7、stresslossesofV帮Cbeanasandthetosscombinationateachworkingstages；4+DescribingandanalysingthemechanicalperformanceofVTPCbeamsduringstaticalandrepeatedloadingtests,themechanicalbehaviorbeforeandaftercrackingpoint,andthecracks5developmentandthecross-sectionfailureforms；5．Analysingt

8、hemainfactorsinfluencingthebeamrigidityandstructuredef