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1、ntroductiontoCivilEngineeringPapersCivilEngineeringforthedevelopmentofakeyrole,firstasamaterialfoundationforthecivilengineeringconstructionmaterials,followedbythesubsequentdevelopmentofthedesigntheoryandconstructiontechnology.Everytimeanewqualityofbuildingmaterials,civil
2、engineeringwillbealeap-styledevelopment.Peoplecanonlyrelyontheearlyearth,woodandothernaturalmaterialsintheconstructionactivities,andlaterappearedinbrickandtilethatartificialmaterials,sothatthefirsthumantobreaktheshacklesofnaturalbuildingmaterials.Chinaintheeleventhcentur
3、yBCintheearlyWesternZhouDynastycreatedthetile.ThefirstbrickinthefifthcenturyBCtothethirdcenturyBC,whenthetomboftheWarringStatesPeriod.Brickandtilebetterthanthemechanicalpropertiesofsoil,materials,andeasytomanufacture.Thebrickandtilesothatpeoplebegantoappearwidely,toalarg
4、enumberofhousingconstructionandurbanfloodcontrolproject,andsoon.Thiscivilengineeringtechnologyhasbeenrapiddevelopment.Upto18tothe19thcentury,aslongastwothousandyears,brickandtilehasbeenamajorcivilengineeringconstructionmaterials,humancivilizationhasmadeagreatcontribution
5、totheevenwasalsowidelyusedinthepresent.Theapplicationofalargenumberofsteelproductsisthesecondleapincivilengineering.Seventeen1970stheuseofpigiron,theearlynineteenthcentury,theuseofwroughtironbridgesandtheconstructionofhousing,whichisapreludetotheemergenceofsteel.Fromtheb
6、eginningofthemid-nineteenthcentury,metallurgicalindustry,smeltingandrollingouthightensileandcompressivestrength,ductility,uniformityofthequalityofconstructionsteelandthenproducehigh-strengthsteelwire,steelcables.Asaresultoftheneedtoadapttothedevelopmentofthesteelstructur
7、ehavebeenflourishing.Inadditiontotheapplicationoftheoriginalbeam,archstructure,thenewtruss,aframework,thestructureofnetwork,cablestructurestopromotethegradualemergenceofthestructureofYanintheformofflowers.Fromthebrickbuildinglong-spanstructures,stonestructures,afewmeters
8、ofwood,steelstructuretothedevelopmentoftensofmeters,afewhundredmeters,untilmodernkmabove.Sointheriver,c
