預應力混凝土偏心受拉構件受力性能及截面強度的計算方法及試驗研究.pdf

1、北方交通大學碩士學位論文預應力混凝土偏心受拉構件受力性能及截面強度的計算方法及試驗研究姓名：胡明申請學位級別：碩士專業(yè)：建筑與土木工程指導教師：夏禾李承根2002.6.1II直鑾塑_丈堂三堡堡主童些蘭焦堡壅壘!!!!型AbstractAccordingtostructuralandloadingcharacterofV—shapesupposingupperbeamsofNanpanjiangbridgeinNanning—Kunmin

2、grailwayroute，calculationmethodofserviceabilityandultimatestrengthofuprightsection，andinclinedsectioncrack—proofperformanceandshearstrengthiSstudiedinthispaperandreliabilityofcalculationmethodiSverifiedTheconclusionsasfo

3、llowsaredrawn1Beforecracksappearoneccentrictensionedmembers(PPCAclass)，thestressofconcreteandsteelbarscanbecalculatedaccordingtoconversionsectionpropertyandformulaofmaterialmechanics2Aflercrackshaveappeared013eccentricte

4、nsionedmembers(PPCBclass)，thewidthofcracksCanbecalculatedbymeansofformulaaboutbentmembersspecifiedincodeTBl00023一鯽TheforrnulatocalculatethestressofconcreteandsteelbarsofcrackingsectionsofPPCmembersundertensionandmomentha

5、vebeendeducedinAppendix，accordingtothreestates，thatisprestressingstate、virtualeliminatingstressstateandexteriorloadactionstate3Stiffnessreductionfactor成usedtocalculatedeflectionofPCandPPCAclasseccentrictensionedmembersbe

6、forecracksappearcarlbeadoptedas094thefactorof085specifiedinTBl00023—99issaferThedeflectionofeccentrictensionedmembersaftercracksappearcanbecalculatedusingthefo訓a：卜盎(；12__a2)4inclinedsectioncrack—proofperformanceofeccentr

7、ictensionedmemberscallbecalculated，accordingtOtheconditionthatthemaintensionstressatthegravitycenterofthemiddleshearspansectionreachesR，5inclinedsectionshearstrengthofPCandPPCclasseccentrictensionedmemberscanbecalculated