缓粘结部分预应力混凝土T梁试验研究及有限元分析_冯新_周先雁_刘泽亚

4520201510BuildingStructureVol．45No．20Oct．2015T*4100043T11T。TTT。ABAQUST。、。。TTU317TU378.8A1002-848X201520-0075-06Experimentalresearchandfiniteelementanalysisonretard-bondedpartiallyprestressedconcreteT-shapedbeamsFengXinZhouXianyanLiuZeyaSchoolofCivilEngineeringandMechanicsCentralSouthUniversityofForestryandTechnologyChangsha410004ChinaAbstractToinvestigatethemechanicalbehaviorandusabilityofretard-bondedprestressedconcretememberthecomparativeexperimentalstudieswerecarriedoutonthreeretard-bondedpartiallyprestressedconcreteT-shapedbeamsonebondedpartiallyprestressedconcreteT-shapedbeamandoneunbondedpartiallyprestressedconcreteT-shapedbeam．Itturnsoutthattheretard-bondedpartiallyprestressedconcreteT-shapedbeamisverysimilartobondedpartiallyprestressedconcreteT-shapedbeaminmechanicalbehaviorbutisapparentlydifferentfromunbondedpartiallyprestressedconcreteT-shapedbeam．FiniteelementsoftwareABAQUSwasusedfornonlinearfiniteelementnumericalsimulationontheretard-bondedpartiallyprestressedconcreteT-shapedbeamsconsideringbothgeometricalnonlinearityandmaterialnonlinearity．Onthebasisofpropermaterialconstitutionrelationshipandelementtypecomparativeanalyseswerecarriedoutwithexperimentalresultsinaspectsofdeformationdevelopmentlawofbeamstraindevelopmentlawofultimateflexuralcapacityandretard-bondedprestressedtendons．Ｒesultsshowthatthesimulationresultscoincidewithtestresultsfairly．Keywordsretard-bondedpartiallyprestressedconcreteT-shapedbeamexperimentalresearchfiniteelementanalysis*2006468-2812JJ5012。[e-mail]。0123。。45、。。6。3T1T1T2015。1711d∶∶∶∶∶=1272.22∶1272.22∶547.05∶6.36∶0.64∶7.6328d35.42MPa《》JTG/TF50—20118。9～15d34.97～39.79MPa。1。PPＲPPＲ=Mp/MuMu=Apfpyhp－x/2+Asfyhs－x/2Mp=Apfpyhp－x/2。ApAshphsfpyfyx。y=2.6839×10－5x2－0.14684x+250。1PPＲBC11×73120.63UC11×73120.63ＲC-G11×73120.63ＲC-C11×73120.63ＲS-G11×73120.63BCUCＲCＲS“-”CG。16m1。C5023。0.75fptk、。23。2/cm3/cm2/dfcu/MPafc/MPaEc/×104MPa948.67——2859.8747.423.929065.2354.464.113/mmfy/MPafu/MPa/%E/GPa15.20—1860.05.6195HＲB33512.0371.7559.622.3198HPB2358.0332.3476.335.2212HPB2356.0301.4452.037.521022.111d。。9d5mm。4。2.230d674520．T4σn/MPaσl/MPaσe/MPa/mmBC1395171.81223.23.114UC1395144.71250.33.171ＲC-G1395263.21131.83.099ＲC-C1395298.71096.32.972ＲS-G1395224.61170.43.109σcσlσe。-4。4-。4-5-6-。9。BCUCＲC-GＲC-CＲS-G66.6254.6267.6265.6257.62kN2～40.02mm0.015mm0.03mm。9189mm2108mm。BCUCＲC-GＲC-CＲS-G3.34.53.53.23.4mm。。。56。56。。、5。7720155BCUCＲC-GＲC-CＲS-GMtcr/kN·m66.6254.6267.6265.6257.62Mty/kN·m126.62118.62127.62126.62127.62Mtu/kN·m154.62146.62158.62156.62152.62ftcr/mm7.0436.8418.2407.8377.290fty/mm33.41240.73733.58432.95041.016ftu/mm183.992149.839167.797161.267174.900εtcr/×10－660146684610460436412εty/×10－676208022739173007939εtu/×10－61114611038108161128410769Mtcrftcrεtcr、Mtyftyεty、Mtuftuεtu、。33.1。ABAQUS10-13。《》GB50010—2010-σ=1－dcEcε1dc。dcdc=1－ρcnn－1+xnx≤11－ρcαcx－12+xx＞1{2n=Ecεcr/Ecεcr－fcrx=ε/εcrρc=fcr/Ecεcrfcrεcrfcrαc-。14--σ=Eε0≤ε≤εt－ftεtf－εtε－εtfεt＜ε≤εtf{3x=ε/εtftεtεtf0.001。、Em=9.34×103MPafmc=27.82MPaεmc=4013×10－6fmt=1.59MPaεmt=117×10－6。--。-147、ab-σ=σbεb－σaεaεb－εa+εaεbσb－σaεb－εaε4σaσbεaεbabσa=0.85fbfb。73.2C3D8ＲT3D2*embedded。、、874520．T6/mm/mm/kN·m/×10－6////ＲC-G2.7422.9720.92161.342167.7970.96155.56158.620.9811156108161.03ＲC-C2.6612.9110.91160.161161.2670.99155.33156.620.9911004112840.98ＲS-G2.8343.1090.91162.034174.9000.93155.91151.621.0311355107691.05。ABAQUSABAQUSＲisk。8。83.3910ＲC-G、。910、。。。。《》JTGD62—20049ＲC-G/m10ＲC-G/m15。411ＲC-G-6。610%。11ＲC-G-。ABAQUS972015。51T、。2TTTT。3ABAQUST。1．M．2006．2．J．200336857-62．3．J．200842254-59．4OMIDIOLOTFIV．Finiteelementanalysisofconcretestructuresusingplastic-damagemodelin3-DimplementationJ．InternationalJournalofCivilEngineering201083187-203．5．J．201343211-8．6．D．2007．7．D．2010．8JTG/TF50—2011S．2011．9．M．1991．10．ABAQUSM．2005．11．J．201242781-83．12DASSAULTSYSTEMSSIMULIACOＲP．ABAQUSstandarduser'smanualABAQUStheorymanualM．InteractiveVersion．AmericaHKSCompany2012．13PETEＲGＲASSLMILANJIＲSEK．Damage-plasticmodelforconcretefailureJ．InternationalJournalofSolidsandStructures20064322-237166-7196．14．M．1997．15．J．201128156-61．08