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1、第3l卷第3期山東建筑大學(xué)學(xué)報(bào)V01.31No.32016矩6月JOURNALOFSHANDONGJIANZHUUNIVERSITYJun.2016文章編號(hào):1673—7644(2016)03—0231—06基于Push—over的多短柱高層結(jié)構(gòu)的抗震性能分析傅日榮,劉康寧,李輝,門(mén)廣闖(1.山東建筑大學(xué)土木工程學(xué)院,山東濟(jì)南250101;2.山東聯(lián)創(chuàng)建筑設(shè)計(jì)有限公司,山東濟(jì)南250101)摘要:多短柱鋼筋混凝土高層建筑結(jié)構(gòu)中短柱是潛在的抗震薄弱部位。針對(duì)該類結(jié)構(gòu)在實(shí)際工程中抗震性能的不確定性,以一按彈性設(shè)計(jì)并采取常規(guī)加強(qiáng)
2、措施的多短柱鋼筋混凝土高層框架一剪力墻結(jié)構(gòu)的實(shí)際工程為例,工程所在地區(qū)的基本烈度為7度(0.10g),采用Push—over分析方法分析了設(shè)防烈度為7度時(shí)結(jié)構(gòu)的抗震性能,并用能力譜法對(duì)抗震性能進(jìn)行了評(píng)估。結(jié)果表明:該結(jié)構(gòu)在7度多遇地震下第一扭轉(zhuǎn)與第一平動(dòng)陣型的周期比為0.812,層間位移角1/1120,小于規(guī)范0.9和1/800的限值,滿足“小震不壞”的抗震水準(zhǔn),但罕遇地震作用時(shí)至少一個(gè)方向不存在性能點(diǎn),不滿足“大震不倒”設(shè)防目標(biāo);類似復(fù)雜結(jié)構(gòu)除按常規(guī)進(jìn)行彈性設(shè)計(jì)外,尚應(yīng)進(jìn)行罕遇地震作用下的彈塑性分析。關(guān)鍵詞:多短柱高層結(jié)
3、構(gòu);抗震性能;Push—over分析;能力普法;性能點(diǎn)中圖分類號(hào):TU996文獻(xiàn)標(biāo)識(shí)碼:APush-overanalysisandseismiccapacityevaluationofmultishortcolumnhighrisestructuresFuRirong,LiuKangning2,LiHui,eta1.(1.SchoolofCivilEngineering,ShandongJianzhuUniversity,Jinan250101,China;2.SshandongLianehuangArchitectura
4、lDesignCo.,Ltd.,Jinan250101,China)Abstract:Shortcolumnsarethepotentialweakpartsofseismicresistanceinmulti—shoft—columnreinforcedconcretehigh-risebuildingstructure.Inviewoftheuncertaintyoftheseismicperformanceofthiskindofstructure,thepapertakesapracticalengineering
5、ofshearwallstructureasexample,whichisamulti·-short·-columnreinforcedconcreteframewithaflexibledesignandaconventionalstrengtheningmeasure.Thebasicintensityis7degree(0.10g),thenbythroughPushoverAnalysis,thepaperdoestheresearchonitsseismicperformanceintheseismicforti
6、ficationintensityof7degree,atthesametimeusesthecapacityspectrummethodtoevaluatetheseismicresistance.Theresultsshowthattheperiodratioofthestructure’Sfirsttorsionandthefirsttranslationalformationwas0.812,inter·storydisplacementanglewas1/1120,whichwerelessthanthestan
7、dardlimitof0.9and1/800under7degreefrequentlyoccurredearthquakes.Itcansatisfytheseismiclevelofthe“smallearthquakebeingnotbad”,butonedirectiondoesnothaveaperformancepointunder7degreeearthquakeaction,SOitcannotmeetthetargetof“l(fā)argeearthquakedoesnotfall”.Itcanbeseenth
8、at,besidestheelasticdesign,thecomplexstructureshouldalsotakeelastic—plasticanalysisundertherarelymetearthquakes.收稿日期:2016—01—05作者簡(jiǎn)介:傅日榮(1964一),女,教授,碩士,主