预制预应力混凝土结构的抗震设计

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1、第35卷增刊2008年增刊第五届全国预应力结构理论与工程应用学术会议(论文集)V01．35。增刊Oct．2008预制预应力混凝土结构的抗震设计NedM．ClelandPh．D．P．E．F．ACIF．PCI[摘要]回顾了美国预制预应力混凝土结构抗震设计的背景及要求。虽然预制混凝土结构的组装和连接工艺与钢结构施工更为类同，但预制混凝土工业仍作为钢筋混凝土的一个分支在发展。这决定了预制混凝土的抗震设计规定来源于现浇混凝土结构的规定。回顾有关抗震设计规定的要求，有助于理解各种地震风险等级下预制混凝土建筑的合理设计与施工。DESIGNoFPRECA

2、ST／PRESTRESSEDCoNCRETEFOREARTHQUAbyNedM．ClelandPh．D．P．E．KESF．ACIF．PCI[Abstract]Inthispaper，thebackgroundandrequirementsfortheseismicdesignofprecast／prestressedconcreteintheUnitedStatesarereviewed．AhhouIghprecastconcreteconstructionisjointedandassembledwithdetailsthataremo

3、recommontosteelconstruction，theindustryWasdevelopedasabranchofreinforcedconcrete．Thishasresultedinthederivationoftherequirementsforseismicdesignfrommonolithiccast—in—placeconstructionprovisions．Areviewofseismicdesignrequirementsinthiscontextisimportantforanunderstandingof

4、appropriatedesignandconstructionofprecastconcretebuildingforalllevelsofseismicrisk．Thehistoryofseismicdesignprecast／prestressedconcreteintheUnitedStatesTheuseofprecast／prestressedconcreteasstructuralsystemsinbuildingsintheUnitedStateshasdevelopedsincethe1950龟．Thegreatestu

5、seduringtheearlyprogressoftheindustryWasinregionsoflowseismicrisk，orregionswhereattentiontoearthquakeriskwaslo．w．Fromthebeginning，precastconcretehasbeenconsideredabranchofthebroaderfieldofreinforcedconcreteconstruction．Assuch，thedesignrulesforprecastconcretewerelargelyder

6、ivedfromthebuildingcodedevelopedformonolithiccast—in—placeconcrete．Althoughsomerulesspecifictothejointedandsimplespannatureofprecastconcreteweredeveloped，thedominantcontextfortheconcretecodeiscontinuous．monolithicconstruction．收稿日期：2008—09—15作者简介：NedM．Cleland．博士，注册工程师Inthe

7、UnitedStates，theauthoritytoregulateconstructionislargelygiventotheindividualstates，andnottothefederalgovernment．Inthelasthalfofthe20thcentury，buildingcodesweresomewhatregional．Threedifferentmodelcodesweredevelopedandapplied．ThereWasalsoadifferenceinthephilosophyoftheappli

8、cationofthesecodes．Intheeasternregion，thelackofarulefor80mefeatureWasoftentakena8permissiontodes