橋梁順風(fēng)向風(fēng)荷載研究.pdf

1、同濟大學(xué)碩士學(xué)位論文橋梁順風(fēng)向風(fēng)荷載研究姓名：劉志剛申請學(xué)位級別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：陳艾榮項海帆2001.7.1旦墮查蘭皇墮嬰主堂垡笙奎壘坐!鱉!WindLoadingonBridgesAbstractGroundedOilthebasicconceptsofwi“l(fā)oadingthecmctIlatiOntechniquesofbackgroundrosporisesandrⅨdOllalltrcspOllSeSare

2、stlIdiedintensivelyi11thethesisandamethodofealculatinganddescribingthcoquivalentstaticwindloadsoilbridg∞isdeveloped，towhichthesolutionsalegiveninanalyticalformsThestudiesalSOICVealBOIlIOproblemsthatmayinthleethe1∞Bofprec

3、isionintheealelllationmethod8Inadditionthestudi％paymuchattentiontotheparticular州ectofunb81aneodwindloading011doublec∞珊w口brid窖∞sinceonlyveryfew咖di∞havebeenmadeonitinlimraturesTheanalyticalformul∞gi、ertinthethesisafeverysi

4、mpleandshowhighprecisioneomparodwiththethcOrdliCalmethod，110intorpolationingraphs01“chartsarcneoddtandtheymakeagoodmettlodforrapidalgill艇6ngcalaulati011Thetheoreticalandsimplifiedmethodsforcaleulati_柚gbaekgrolHldequivale

5、ntwind1011dsOnstaticoointlike粕dhorizontallinelikestruetm船a∞studiodineludilagtheiI塔切血t習(xí)∞娜gustwindspeedatapoint，gustwindloadingOnastatiepointlikestructurehased011thelinoarassumption，gustveloeitieswithfiniteaveragingtime，di

6、SCUS$ionsabouttheintlueneesofthequadratictermandthevalidityoftheadoptedwindspectratheaveragedwindloadsoverthelengtlaofstatichorizontallinelikeSIZlIctuIeS，theequivalentwindloadsOnstatichorizontalline1ikeslnlcIl螂involvingj

7、nfluencelineswithconstantsignsandchmgiIIgsignsandunbalancedbael喀rounclwindloading011doublecantileverbridgesTheinfluenceofmeaerodynamicadmittancoofthebridgedeckisintroducodintowindloadscaleulationwhich1110dmesahorizontall

8、ine1ikestructuretoabridgedeckThemostunfavorabledistributionsofthebackgroundequivaleaatwind10adsandthewindloadingwithfiniteaveragi岵lirao81“0alsodiscussedhereinTheauthoralaostudiesi曲lsivdy011oquivalentwitdloadsQndymmaiebri

9、dgesinwhichrellonatltice8DOllSe$aretakenintoc∞siderationincludingtheequivalentwind10adsonadynamicpointlikestrtlcturc，theecluivalont誦ndloadsOnclynamiebridges，tmbalaneo謝IldloadingOndoublecantileverbridge8，thecombinationmct

10、hodoftheme鋤，backgroundandr髂ollgatcomponentsoftheresponsesofwindloading∞dsomediseugsiorlsaboutthebridgeelassifiealionFinallythesimplifiedmethodsforcaleulatingtheequivalentwindloads011longspancablesupportedbridgesaredevclo

11、pedneproportionsofthebaekgrolmdandresonanteomponontsintheequivalentwindloadsdi婦’erenccsfromdistineteqllivalentbasisandtheeontributiomofhighermodesthroughrealbridgedata∞alsostudiedKeywords：Bridges，F(xiàn)luctuatingwi“l(fā)oads，Equi