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1、解读我国钢筋混凝土抗震设计新规范(InterpretationofnewcodesforseismicdesignofreinforcedconcreteinChina)IntcrprctationofnewcodesforseismicdesignofreinforcedconcrctcinChinaKeywords:Codeforseismicdesignofbuildings,GB50011-2001,codefordesignofconcretestructures,GB50010-2002,technicalspec
2、ificationforconcretestructuresoftai1buildings,JGJ3-20021DeterminationofseismicforceinstructuraldesignFeasibilityof1.1lowseismicforceBy1980s,allspecificationsforthedesignofarecognitionofthefactthatintheearthquake,thestructureinrealfailure,thereisalargeplasticdeformat
3、ion(ductility),thestructuremayreachorclosetotheyieldingstateinasmallerearthquake;inalargeearthquake,somepartsofthestructurewillenterthenonclasticdeformationafteryiclding,andwiththeincreaseoftheforceoftheearthquake,thestructureinclastic-plasticdeformationareaincrease
4、d,yieldintoadvancedpartsofclastic-plasticdeformationalsoincreases・Thestructureconvertsenergyfromthisearthquaketoheatenergybydissipatingmoreseismicenergy.Forthedesignofearthquakeforceductilityjointrule,wecanunderstandtherelationshipbetweentheseismicforceandstructure:
5、ontheonehandthe1owseismicdesignstructure,seismicenergydissipatedbydeformationmoreinclasticmoreinelasticdeformation;ontheotherhand,thegreaterthestructure,reductionofstiffnessdampingmoreserious・Cycleratioincreased,structureseismicdesignforceincreasemore,thetotalseismi
6、cforceofthestructurehasalsobeenreducedmore・Thisallowsustotakeaseismicresponsebelowthefortificationintensityasadesigntoolinthedesignprocesswithoutreducingtheverticalbearingcapacityofthestructureandensuringtheductilityofthestructure・Conversely,ifthedesignofearthquakef
7、orcebasedonthelowerpartofthestructureyield,reducethebearingcapacityofhorizontalandverticalyieldunderthenonelasticdeformationtoachievegreater,alsoneedtohaveabetterductilityperformancestructure・Inthisway,weneedtosolvethefollowingtwoproblems:HowdoesA.establishaproperli
8、nkbetweenfortificationintensity,seismicactionanddesignseismicforcevalues?;HowdoesB.establishcorrespondencebetweenthedesignseismicforceandt
