大跨度屋盖结构等效静力风荷载数值计算方法

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1、http://www.paper.edu.cnNumericalevaluationofequivalentstaticwindLoadsofLong-spanRoofsHaiyangWuCollegeofCivil&ArchitecturalEngineeringWuhanUniversityWuhan,P.R.China430072Wuocean198010@163.comABSTRACTInthispaper,thecomplexityofcalculatingtheequivalentstaticwindloadsoflong-spanroofsisde

2、monstratedonthebasisofthepresentresearchsituationofstructuralequivalentstaticwindload.Theconceptofequivalentstaticwindloadsofextremeeffectsisproposed,andthenumericalmethodstocalculateequivalentstaticwindloadsofextremeeffectsoflong-spanroofsarepresented.Thispaperparticularlypointsoutt

3、hatitispossibletoobtaintheaccuratedisplacementequivalentstaticwindloads,butthepreciseinternalforceequivalentstaticwindloadsdonotusuallyexist.Takingthecantileveredroofsoftwolarge-scalestadiumsforexamples,theresultsobtainedindicatethemethodproposedinthispaperispracticableandconvenient.

4、KEYWORDS:Long-spanroofs;Equivalentstaticwindload;Least-squaremethod;Wind-resistantdesign;1IntroductionEquivalentstaticwindloadisabridgethatconnectsthewind-resistantresearchanddesignofstructures,whichisoneofthehottestissuesinthefieldofstructuralwindengineeringforrecentyears.SinceDaven

5、portproposedGLFmethodforevaluatingequivalentstaticwindloadoftallbuildingsinthe1960s[1],manyotherscholarshavebeencarryingouttheresearchonequivalentstaticwindloadofstructures.Intheninetiesoflastcentury,bothKasperskiandSolarifoundthatGLFmethodwasnotsuitableforcalculatingtheequivalentsta

6、ticwindloadoflow-risebuildings,andsubsequentlyputforwardtheLRCmethod[2,3].However,theequivalentstaticwindloadsobtainedbyLRCmethodareonlycorrespondingtoacertainkindofwind–inducedresponseatacertainpositionofthestructure,andresponsesatotherpositionsofthestructureunderthissetofloadsareus

7、uallynotidenticalwiththeresponsesacquiredaccordingtothetheoryofrandomvibration.Windloadson,andwind-inducedresponsesof,long-spanroofsareverycomplicated,andthedistributionsofwind-inducedresponsesoflong-spanroofs,notlikethatoftallbuildings,couldnotbecontrolledbyaextremeresponseatacertai

8、nposition[4]