普通砖砌体受压本构模型_吕伟荣

3611　　　200611吕伟荣1,2　施楚贤1(1　410082;2　412008)[]　,,。5,-,,。[]　　　　-ConstitutiveRelationshipofBrickMasonryLǜWeirong1,2,ShiChuxian1(1CollegeofCivilEngineering,HunanUniversity,Changsha410082,China;2DepartmentofCivilEngineering,HunanUniversityofTechnology,Zhuzhou412008,China)Abstract:Thestress-straincurveofcommonbrickmasonryincompressioniscompletelydescribedbasedoncompresstestresultsofliteratureandconstitutiverelationshipofconcrete.Atthesametime,amathematicmodelof5degreespolynomialisused,andthewholeprocessofcommonbrickmasonryincompressionisdescribedbyonesmoothcurve.Theresultsofcontrastindicatethattheproposedmodelisfeasibleandmeetstherequestofengineeringcalculationandfiniteelementanalysis.Keywords:commonbrickmasonry;compress;constitutiverelationship;stress-straincurve1　-。1MU10M5-,[1]。[2]1∶14∶3,-2。1　-　2　-　[3]12,-3。,--[4],4,4。4,A,σA=0.43fm[1];B,ε0;C(),1,33　[2]-　4　-　σA=(0.8～0.85)fm,,xC;D,;fm。,。30ОНИШИК,[1]87,fm。-,,,。[5],,,。[6],,[7][6],77,。[8][1],,-,、、,,,。,[4],5,-。2　2.14,-:①x=0,y=0;②x=0,y′=dσdεfmε0=E0Es,,E0,EsB;③x=1,y=1;④x=1,y′=0;⑤x=xC,y″=0;⑥x=xD,y=0,;⑦0x≤xC,y″≤0,;⑧xxC,y″0,;⑨0x+∞,0≤y≤1;⑩x※+∞,y※1。①～⑥,6,:y=a0+a1x+a2x2+a3x3+a4x4+a5x5(1):y,y=σfm;x,x=εε0;a0,a1,a2,a3,a4,a5,。①:a0=0。β=E0Es,②～6,:1111234513xD6x2C10x3C014xD10x2Da2a3a4a5=1-β-β00(2),(2)β,xD,xEa2,a3,a4,a5。2.21.β[1]-:ε=-1460fmln1-σfm(3)ε,ε=0E0=460fmfm。[1]ε0=0.005fm,:Es=200fmfm。E0,Esβ=2.3。2.xD1～3,xD-,1.5～2.0,1.7。3.xExE,,[1-3]xE=2.5。2.3β=2.3,xD=1.7,xE=2.5(2):a2=-1.555;a3=0.195;a4=0.075;a5=-0.015。(1),-:σfm=2.3εε0-1.555εε02+0.195εε03+0.075εε04-0.015εε05(4)3　(4)[1],5,6。5,[1](4)1.039,0.045,。6,(4)。5　(4)[1]6　(4)(53)786。,ζ[8]。,PPu,ζ。ζu,ζw12(),ζ1.61.6()。6。2,,,,ζu0.480,ζw0.408,5　ST-1　6　CS1(1)τz　ζ2ζuζwζ1.6ST-10.46980.50820.4753CCS1(1)0.37300.32620.3338E294#(1)0.43370.37840.3960670.5050.4090.4341330.5860.4250.4802320.5110.3990.437—0.4800.4080.426ζ1.60.426,0.50[8],。4　(1),1～127mm,,43.6%10mm。,10mm。23.6mm,,。(2)ζ0.50,ζu0.480,ζw0.408,ζ1.60.426,。[1]DANBROWN.Effectofconstructiononaxialcapacityofdrilledfoundationsinpiedmontsoils[J].JournalofGeotechnicalandGeoenvironmentEngineering,2002,128(12).[2],,.[J].,2001,23(5).[3].[M].:,1990.[4]MINGFANGCHANG,HONGZHU.Constructioneffectonloadtransferalongboredpile[J].JournalofGeotechnicalandGeoenvironmentEngineering,2004,130(4).[5].[D].:,2004.[6]ONEILLMW.Sideresistanceinpilesanddrilledshafts[J].JournalofGeotechnicalandGeoenvironmentalEngineering,2001,127(1).[7].[J].,27(2).[8]《》.[M].:,1995.(78)4　(1)[1]～[3],,。(2),[4],5。5,6,。(3),-,。[1].()[M].:,2003.[2]ARNOLDW.HENDRY.StructuralBrickwork.1981.[3],.[J].,1997(2):22-25.[4].[M].:,1997.[5].[M].:,1991.[6]TURNSERKV,CACOVICF.Someexperimentalresultsonthestrengthofbrickmasonry[M].ProceedingpftheSIBMAC,1971.[7]BPOWELL,HRHODGKINSON.Determinationofstress-strainrelationshipofbrickwork[M].TN249,B.C.R.AStokeonTrent,1976.[8],,.[J].,2001(9):8-10.[9]KEISHNANARAINE,SACHCHIDANANDSINHA.Behaviorofbrickmasonryundercycliccompressiveloading[J].JournalofConstructionEngineeringandManagement,1989(6):1432-1444.53