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1、一、外文原文:TallBuildingStructureTallbuildingshavefascinatedmankindfromthebeginningofcivilization,theirconstructionbeinginitiallyfordefenseandsubsequentlyforecclesiasticalpurposes.Thegrowthinmoderntallbuildingconstruction,however,whichbeganinthe1880s,hasbeen
2、largelyforcommercialandresidentialpurposes.Tallcommercialbuildingsareprimarilyaresponsetothedemandbybusinessactivitiestobeasclosetoeachother,andtothecitycenter,aspossible,therebyputtingintensepressureontheavailablelandspace.Also,becausetheyformdistincti
3、velandmarks,tallcommercialbuildingsarefrequentlydevelopedincitycentersasprestigesymbolsforcorporateorganizations.Further,thebusinessandtouristcommunity,withitsincreasingmobility,hasfuelledaneedformore,frequentlyhigh-rise,citycenterhotelaccommodations.Th
4、erapidgrowthoftheurbanpopulationandtheconsequentpressureonlimitedspacehaveconsiderablyinfluencedcityresidentialdevelopment.Thehighcostofland,thedesiretoavoidacontinuousurbansprawl,andtheneedtopreserveimportantagriculturalproductionhaveallcontributedtodr
5、iveresidentialbuildingsupward.Ideally,intheearlystagesofplanningabuilding,theentiredesignteam,includingthearchitect,structuralengineer,andservicesengineer,shouldcollaboratetoagreeonaformofstructuretosatisfytheirrespectiverequirementsoffunction,safetyand
6、serviceability,andservicing.Acompromisebetweenconflictingdemandswillbealmostinevitable.Inallbuttheverytalleststructures,however,thestructuralarrangementwillbesubservienttothearchitecturalrequirementsofspacearrangementandaesthetics.Thetwoprimarytypesofve
7、rticalload-resistingelementsoftallbuildingsarecolumnsandwalls,thelatteractingeitherindependentlyasshearwallsorinassembliesasshearwallcores.Thebuildingfunctionwillleadnaturallytotheprovisionofwallstodivideandenclosespace,andofcorestocontainandconveyservi
8、cessuchaselevators.Columnswillbeprovided,inotherwiseunsupportedregions,totransmitgravityloadsand,insometypesofstructure,horizontalloadsalso.Theinevitableprimaryfunctionofthestructuralelementsistoresistthegravityloadingfromtheweig