结构的设计使用年限与结构重要性系数

[]1002-8528(2000)06-0032-02(,100013)[]I,,,[];I;;()[]TU31112[]AOnStructuralDesignWorkingLifeandtheImportanceFactorofStructureSHIZhi2hua(ChinaAcademyofBuildingResearch,Beijing100013,China)[Abstract]AccordingtothepropertiesofextremevaluetypeIprobabilitydistribution,theloadvaluesonthedifferentdistribu2tionsofvariableload,whichhavethesameprobabilityofexceedance,werecalculatedinthepaper,whiletheprobabilityofex2ceedanceofthecharacteristicvalueofvariableloadwithinthedesignreferenceperiodwastakenasreferencedatum.Besides,therela2tionbetweenthecalculatedvaluesandtheimportancefactorofstructureisalsodiscussed.[Keywords]Designworkinglife;extremevaluetypeIprobabilitydistribution;permanentload;variableload(liveload)[]2000-09-06,11()1152253504100,:;,,1207080,,II,:LT=L+lnr6L,Lr=LLTLTTLT;LLL;rT,(T=50)LTLk11LkLi166Vol.16,No.6200012BUILDINGSCIENCEDec.2000©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(kN/m2)rrrLiLrs0138601355011780124450150401468011620125250158001955013510142850LiTLrT016090166101178012440170701784011620125211650212600135101428LT110470130211288013002184001554Lk(%)210311699102102137971431511198815:,10,1;Lk=LT+LT,Turkstra,2,LT,LiLrT,LT=Li+LrTLT=2Li+2LrTLTI,Lk=210kN/m2,LT3116,9910%;,LT2137,9714%;,LT1119,8815%100,100L100,,Lk100=2113kN/m2;,Lk100=2114kN/m2;,Lk100=3173kN/m2Lk100Lk7%,33T=100(kN/m2)rrrLiLrs0138601355011780124410015040146801162012521001580019550135101428100Li100Lr100017060179301178012440179501920011620125211840214920135101428L100111790130211424013003107201554(%)Lk100311699102113213797142114111988153173:Lk100=L100+L10025,25L25,,Lk25=1187kN/m2;,Lk25=1186kN/m2;,Lk25=3127kN/m2,Lk25Lk7%,44T=25(kN/m2)rrrLiLrs01386013550117801244215015040146801162012522150158001955013510142825Li25Lr25015130152901178012440162001648011620125211461210290135101428L25019150130211152013002160901554(%)Lk25311699101187213797141186111988153127:Lk25=L25+L2522(Pe)2,LkT:T=LkTLk,100,T11070,111,,T0,()710130:(1)100,111;(42)336:©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=01349,,,1155,115501349=0154(3)0154,:V=11185RE(nfcbhc+afyAs)(4),RE,0185;:(1),,;,,0125%115%(2),,;1/3,37(3),20200mm,200mm,5(1),(2)60160mm,,60160mm(3),[][1].[R].,19801P341361.[2].[M].:,1988.[3],.[J].,1986(4),P5468.[4](JGJ1-91)[S].:,1991.[5]R.ParkandT.Paulay,ReinforcedConcreteStructures[M].AWi2leyIntersciencePublicationJohnWiley&Sons,1975.[6]LucianoFronteddu,PierreLeger,ReneTinawi.Staticanddynamicbehaviorofconcreteliftjointinterfaces[J].Journalofstructuralengineering,1998(12),P14181429.[7],,.—yPca[M].10120.(33)(2)50,1.0;(3)5,019100,,,,,,,10050,25,,,0,,,[][1]()2000.8[S].[2][M].,1986.[3],,.[M].:,1990.10.2416©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.