资源描述：
《study on loading ability of straw bale》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、StudyonLoadingAbilityofStrawBaleJune2oo6JournalofNortheastAgriculturalUniversityVoI.13.No.173—77AtticleID:1006—8104(2006)一01—0073—05StudyonLoadingAbilityofStrawBaleLIUKun.JIANGEnchen,DUANJieli(1.EngineeringCollege,NortheastAgriculturalUniversity,HarbinHeilongjiang150030,PRC;2.EngineeringColleg
2、e,SouthChinaAgriculturalUniversity,GuangzhouGuangdong510642,PRC)Abstract:TheloadingabilityofstrawbalewastestedbyElectronicalTestingMachine.Thelinearregressionequationswereproposedbetweenfailuredensityandloadingability.andfailuredensityandcompressingenergy.Basedonanexponentmodel,thetestingcoeff
3、icientsofstrawbalewereestimatedusingLevenberg-MarquardtMethod.Theresultsoftestshowedthattherelationbetweenfailuredensityandloadingabilityandcompressingenergywaslinearinthephaseofhighdensity.Theloadingabilityofstrawbalecouldmeetthebuildingbil1.Keywords:strawbale;testingcoefficients;failuredensi
4、ty;IoadingabilityCLCnumber:$210.3Documentcode:ABeingaby—productofcerealsproduction,strawhasbeenutilizedinmanyformsofconstructionoverthousandsofyearssincethedaysthathumanbeingswereabletoplantandbuild.Untilthe1940swhencementbegantobebuildingmaterialinalargescale,thestrawhousedisappearedgradually
5、.Strawistheplantstructurebetweenthegrainheadandtherootcrown.Thestructureofstrawitselfismainlycomposedofthreecomponents:acelluloserich,denseouterlay—er,asoftercellularregionandacentralvoidIl1.Thecellularnaturegivesstrawalowdensity,andcontrib—utestothegoodthermalcharacteristicsofstrawbales.Cellu
6、losehasalowthermalconductivity,improvingthermalperformance,butissusceptibletodegradationbyattractingwaterandencouragingfungalattack.Adryenvironmentwillnegatethis,forfungicannotsur—vivewhenwaterisabsent.Ifthemoisturecontentofstrawislessthan20%,decaywillnotbegin.Strawbalesaremassesofstrawcompres
7、sedintorectangularblockswhichareboundedwithsteelwireorpolypropylenewithsomedensity.Americaninvitedthemechanicalbalerfirstandtheymadeuseofthestrawbalefirst.Inthe1890s.themechanicalbalerenteredcommonusageinAmericanagriculture.InNe—braska,
