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1、第26卷第3期世界地震工程Vo.l26No.32010年9月WORLDEARTHQUAKEENGINEERINGSep.2010文章編號(hào):1007-6069(2010)03-0037-06半剛性連接焊接空心球網(wǎng)殼彈塑性分析的短桿模型1,31,21廖俊,張毅剛,吳金志(1.北京工業(yè)大學(xué)空間結(jié)構(gòu)研究中心,北京100124;2.北京工業(yè)大學(xué)城市與工程安全減災(zāi)省部共建教育部重點(diǎn)實(shí)驗(yàn)室,北京100124;3中冶建筑研究總院有限公司,北京100088)摘要:提出了一種考慮焊接空心球節(jié)點(diǎn)半剛性網(wǎng)殼彈塑性分析的短桿模型,即采用等效短桿模擬
2、焊接空心球節(jié)點(diǎn),通過對(duì)質(zhì)量、橫截面積及慣性矩的折算來模擬球的質(zhì)量及初始剛度,并利用自定義PMM塑性鉸模擬焊接空心球節(jié)點(diǎn)塑性工作階段隨軸力變化的彎曲剛度。在SAP2000有限元軟件中實(shí)現(xiàn)了該計(jì)算模型的導(dǎo)入,并通過算例證明了采用該模型進(jìn)行彈塑性分析的可行性。短桿模型適用于半剛性連接焊接空心球網(wǎng)殼的靜動(dòng)力彈塑性分析,借助它可以更準(zhǔn)確地分析半剛性連接焊接空心球網(wǎng)殼塑性階段的真實(shí)反應(yīng)和實(shí)際工作性能。關(guān)鍵詞:半剛性;焊接空心球;網(wǎng)殼;彈塑性;短桿模型中圖分類號(hào):TU393.3;P31597文獻(xiàn)標(biāo)識(shí)碼:AShortmembermodelofreticula
3、tedshellwithsemirigidweldedhollowsphericaljointsforelasticplasticanalysis1,31,21LIAOJun,ZHANGYigang,WUJinzhi(1.SpaceStructureResearchCenter,BeijingUniversityofTechnology,Beijing100124,China;2.KeyLaboratoryofCityandEngineeringSafetyMitigationofMinistryofEducation,BeijingUniversity
4、ofTechnology,Beijing100124,China;3MCCCentralResearchInstituteofBuildingandConstructionCo.Ltd,Beijing100088,China)Abstract:Theshortmembermodelconsideringthesemirigidityofweldedhollowsphericaljointsispresented.Equivalentshortmemberisusedtosimulatetheweldedhollowsphericaljoin.tIt
5、simulatesthemassandtheinitialstiffnessofthejointthroughtheconversionsofmass,crosssectionalareaandmomentofinertia.ThebendingrigiditychangingwiththeaxialforceintheplasticphaseissimulatedthroughselfdefinedPMMplastichinge.IntheSAP2000finiteelementsoftware,thecalculationmodelisintrodu
6、cedandprovedtobefeasibleinelasticplasticanalysisthoughcalculationexamples.Shortmembermodelisappropriatetostaticanddynamicelasticplasticanalysisofreticulatedshellconsideringthesemirigidityofweldedhollowsphericaljoints.Theactualbehaviorandworkperformanceofthereticulatedshellwith
7、semirigidconnectionsinplasticphasecanbeanalyzedaccuratelythroughi.tKeywords:semirigid;weldedhollowsphericaljoin;treticulatedshel;lelasticplastic;shortmembermodel引言近年來,隨著網(wǎng)殼結(jié)構(gòu)的應(yīng)用越來越多,眾多學(xué)者對(duì)半剛性連接網(wǎng)殼的計(jì)算模型和受力性能的研究更加收稿日期:2010-03-08;修訂日期:2010-04-22基金項(xiàng)目:國家自然科學(xué)基金重大研究計(jì)劃重點(diǎn)支持項(xiàng)目(90715034
8、)作者簡介:廖俊(1983-),男,碩士研究生
