既有砖砌体现场砂浆强度试验研究_梁建国

451720159BuildingStructureVol．45No．17Sep．2015*112114100042410082。60、。7。TU502.6A1002-848X201517-0063-04Experimentalstudyonin-situstrengthofmortarinexistingbrickmasonryLiangJianguo1ShiLiu1WangTao2LiuZhefeng11SchoolofCivilEngineeringandArchitectureChangshaUniversityofScience＆TechnologyChangsha410004China2SchoolofCivilEngineeringHunanUniversityChangsha410082ChinaAbstractThewideapplicationofallkindsofnon-firedbrickputsforwardnewrequirementsforin-situtestofmasonry．Thewaterabsorptionindicesofbricksofdifferenttypesandwithdifferentinitialmoisturecontentswerederivedbasedonthepumpingtestresultsof60commonfiredbricksautoclavedflyashbricksandautoclavedlime-sandbrickswithdifferentinitialmoisturecontentaccordingtotheprincipleofabsorbingwaterdynamics．Thein-situstrengthofmortarof7wallsofbrickmasonrywasstudiedwithreboundmethodandcylinderpressuremethod．Therelationshipsofthereboundvalueandthecylindricalpressureratiowithwaterabsorptionindexofmortarofdifferentkindsofbrickmasonrywereobtained．Aunifiedformulaforin-situmortarstrengthofdifferentkindsofbrickmasonryandwaterabsorptionindexofbrickwassetupprovidingatheoreticalbasisfortherelevantstandardrevision．Keywordsbrickwaterabsorptionindexmasonrymortarin-situtestcompressivestrengthtestmethod*20125。[e-mail]。01。。2。3。、。《》GB/T50315—20114GB/T50315。、、、GB/T50315《》。。1S1.11.1.15Q=dVdt=πＲ4H8η·ΔPy1QVtη20℃1×10－3N·m/m2ΔPy2015ＲHＲH=APAP。1wtwt槡=at22wt槡taa=πρr2rγcosθ2槡ηρrγ20℃0.0728N/mθ0°。1.1.2nWt6Wt槡=St3S。3SS、rS=ρrγcosθ2槡η=nπr2SbSb。SS。S。1.2S1.2.1、、2015.35%27．00%17.11%14.7711.6616.36MPa45。2d0%4%8%10%。ASTMC67-067、。3.18±0.25mm21±1.4℃。1g。0.5min1min2min3min4min5min10min20min30min60min2h3h5h8h9h12h24h2d3d4d5d6d7d。1。11.2.2S槡t2～5。2～5槡t3。SS、S。20%槡t34%槡t1260S。464517．48%槡t510%槡tSSdS/Sdξ6。S/SdS/Sd=0．974－0．901ξ40.864。ξ=100%S=0ξ=0S=SdS=1－ξSd5654。51.03923.3%5。6S/Sdξ22.1、32.5、《》JGJ/T98—20108。、、328d。。1。/MPa128d60d120d200dM2．581．221．441．45M2．5102．532．712．78M2．5101．581．661．70M584．384．744．84M5107．749．889．91M5106．066．476．69M1085．785．916．46M101010．0312．112．8M10108．469．619．58M5M5361．564．87M10M10365．208．522.2M5M101SM21500mm、1000mm、240mm。M2.5M5M10FM、HM16740mm、746mm、240mm。《》GB/T50203—20111GB/T50203。6.76%8.50%8.30%。33.1GB/T50315。。4370mm×373mm1123。。28d60d。3.2GB/T50315、5。2。GB/T50315d≤1．0mmf2ij5620152/dＲf2/MPaS9f2ij/MPaf2/f2ijSM528218.54.877.165.020.97SM1028225.58.527.1615.780.54FM2.5282213.42.533.762.940.86HM2.5281912.31.581.62.560.62FM5281718.17.743.767.581.02HM5282216.16.061.66.540.93FM1028171910.033.768.831.14HM10281617.38.461.67.851.08FM2.5602213.92.713.762.960.91HM2.5602213.31.661.63.180.52FM5602218.59.883.768.031.23HM5602216.56.471.66.520.99FM10602219.812.13.7610.281.18HM106022189.611.68.971.07f2ij=13．97×10－5Ｒ3．576Ｒ1210。。αα=f2ij13．97×10－5Ｒ3．577S。α=－0．185S+2．40878f2ij=13．97×10－5αＲ3．57992。0.9324.3%。GB/T5020350%～60%55%40%～50%45%。44.120mm5mm10kg。2min4.75～16mm7kg。105±5℃。GB/T50315。4.2GB/T503153ηi。3。GB/T50315f2i=6．10ηi+11．0η2．0i10ββ=f2i6．10ηi+11．0η2．0i11βS。β=－0．075S+1．31121112f2i=β6．10ηi+11．0η2．0i13133。0.99631.8%。555%45%。3ηi/MPaS13f2i/MPaf2/f2iSM5100.5924.877.165.770.84SM10100.8188.527.169.550.89FM2.5100.3732.783.763.910.71FM5100.5989.913.767.791.27FM10100.62912.83.768.411.52HM2.5100.2741.71.62.980.57HM5100.5126.691.67.160.93HM10100.5449.581.67.831.2251Wt=槡St。S91664517．。1、、。2、。。1．J．200636S1458-460463．2．J．201319257-62．3KASPEＲSKIM．Designwindloadsforlow-risebuildingsacriticalreviewofwindloadspecificationsforindustrialbuildingsJ．JournalofWindEngineeringandIndustrialAerodynamic1996612169-179．4．FBGJ．200926340-43．5．J．201141S11438-1442．6．D．2007．7BANEＲJEEABHATTACHAＲYABMALLIKAK．Largedeflectionofcantileverbeamswithgeometricnon-linearityanalyticalandnumericalapproachesJ．InternationalJournalofNon-LinearMechanics2008435366-376．8．J．2013343403-408．9XUQILOUJITONGGENGJIANGＲUIetal．UnifiedsolutionmethodofrectangularplateflasticbendingJ．JournalofSoutheastUniversityEnglishEdition2002183241-248．10．J．1994472-75．66。2S。3α。4β。1GB/T50203—2011S．2011．2．J．201041156-59．3．J．2007341232-35．4GB/T50315—2011S．2011．5LEVENTISAVEＲGANELAKISDAHALSEMＲetal．CapillaryimbibitionandporecharacterizationincementpastesJ．TransportinPorousMedia2000395143-157．6DAVIDBENAVENTEPETEＲLOCKMNGELESGAＲCADELCUＲAetal．PredictingthecapillaryimbibitionofporousrocksfrommicrostructureJ．TransportinPorousMedia2002491059-76．7ASTMC67-06StandardtestmethodsforsamplingandtestingbrickandstructuralclaytileS．WestConshohockenASTMInternational2006．8JGJ/T98—2010S．2010．19