资源描述:
《高层建筑地下室有粘结预应力顶板设计与施工技术探讨(Discussion on design and construction technology of bonded prestressed roof of high rise building basement).doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、高层建筑地下室有粘结预应力顶板设计与施工技术探讨(Discussionondesignandconstructiontechnologyofbondedprestressedroofofhighrisebuildingbasement)DiscussionondesignandconstructiontechnologyofbondedprestressedroofofhighrisebuildingbasementAbstract:combiningwiththeprojectexamples,expoundsthebasementroofw
2、iththemainpointsofdesignandconstructionofprestressedtechnology,andcomparativeanalysisingeneralandconcrete,theuseofadvancedperformanceandgoodeconomyarediscussedandsummarized.Keywords:bondedprestressed;basementroof;reinforcedconcretefloor;reinforcement;economy1projectoverviewH
3、unan,aresidentialareabymorethan10~13,smallhigh-riseandmulti-storeyresidentialcomposition,withatotalconstructionareaof100thousandm2.Theroofoutsidethebasementwithprestressedtechnology,inordertomakefulluseoftheroofspace,usuallyundertherooffortheindoorparkinglot,thewaris6levelof
4、materialbase,andtheroofplantinggrass,gardenbuildingandotherpublicfacilities,tocreateacomfortablelifeofleisure,full-featurednoblecommunity.Thecolumnsizeis8.0m×8.0m,thebasementroofoverlyingsoil1000mm,andairdefenserequirements.Becauseoflargeload(coveringsoilload,firetruckloadan
5、dcivilairload)andhighrequirementforcrackingresistance,theroofofthebasementoftheprojectismadeofbondedprestressedfloorslabtechnology,anditslayoutisshowninfigure1.Designcalculationof2bondedprestressedprestressedconcretebasementroof2.1calculationmodelanddesignparametersThebaseme
6、ntoftheroofcoveringoutdoorengineering1000mm,concretestrengthgradeofC35,fc=16.7N/mm2,nonprestressedreinforcementforgradeIIsteel,fy=300N/mm2,prestressedsteelisadiameterofs15.2,fptk=1860N/mm2gradelowrelaxationsteelstrandtensioncontrolstress0.7fptk=1302MPa.Designloadis:boardthic
7、kness300mm,weight:7.5kN/m2,otherdeadload:20.0kN/m2,normaluseliveload:3.5kN/m2,firetruckload:20kN/m2,airdefenseequivalentload:65kN/m2.Becausethebasementroofloadanddifferentdistributionofcomplicatedboundaryconditions,whilealsoconsideringthetemperaturestress(theprojectconsidere
8、d25DEGCtemperaturedifference)effect,anddifferentcalculationmodels,thestress