土木工程专业英语第3课lesson 3 components of a building1[宝典]教案.ppt

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,The,,,,,,,,,,,,,,,architecture,,,,,combines,,,,,,,,,,the,,,,,,,,,,,,,,,function,,,,,,,,,,of,,,,,,,,,,an,,,,,,,,,,office,,,,,,,,,,block,,,,,,,,,,with,,,,,the,,,,,,,,,,function,,,,,,,,,,of,,,,,a,,,,,radio,,,,,tower,,,,,,producing,,,,,a,,,,,structure,,,,,which,,,,,is,,,,,strangely,,,,,thinner,,,,,in,,,,,the,,,,,middle,,,,,than,,,,,at,,,,,the,,,,,top,,,,,and,,,,,bottom.,,,,,This,,,,,wasp,,,,,waist,,,,,effect,,,,,has,,,,,always,,,,,had,,,,,style,,,,,and,,,,,may,,,,,look,,,,,futuristic,,,,,in,,,,,some,,,,,ways,,,,,,but,,,,,at,,,,,the,,,,,time,,,,,it,,,,,was,,,,,built,,,,,in,,,,,the,,,,,1960s*,,,,,it,,,,,was,,,,,an,,,,,astonishing,,,,,futuristic,,,,,architectural,,,,,statement.,,,,, 想一瞪珊涡夷冲涧历湃硫卢漂雕邮贞橙铅弓炉矾箍张陶幸癌吁诀兼烃婚烤土木工程专业英语第3课lesson,,,,,3,,,,,,,,,,components,,,,,of,,,,,a,,,,,building1土木工程专业英语第3课lesson,,,,,3,,,,,,,,,,components,,,,,of,,,,,a,,,,,building1 * ,,,,,,,,,,,,,,,,,,,,A,,,,,change,,,,,in,,,,,attitude,,,,,about,,,,,skyscraper,,,,,construction,,,,,has,,,,,brought,,,,,a,,,,,return,,,,,to,,,,,the,,,,,use,,,,,of,,,,,the,,,,,bearing,,,,,wall.,,,,,In,,,,,New,,,,,York,,,,,City,,,,,,the,,,,,Columbia,,,,,Broadcasting,,,,,System,,,,,Building,,,,,,designed,,,,,by,,,,,Eero,,,,,Saarinen,,,,,in,,,,,1962,,,,,,has,,,,,a,,,,,perimeter,,,,,wall,,,,,consisting,,,,,of,,,,,5-foot(1.5-meter)wide,,,,,concrete,,,,,columns,,,,,spaced,,,,,10feet,,,,,(3,,,,,meters),,,,,from,,,,,column,,,,,center,,,,,to,,,,,center.,,,,,This,,,,,perimeter,,,,,wall,,,,,,in,,,,,effect,,,,,,constitutes,,,,,a,,,,,bearing,,,,,wall.,,,,,One,,,,,reason,,,,,for,,,,,this,,,,,trend,,,,,is,,,,,that,,,,,stiffness,,,,,against,,,,,the,,,,,action,,,,,of,,,,,wind,,,,,can,,,,,be,,,,,economically,,,,,obtained,,,,,by,,,,,using,,,,,the,,,,,walls,,,,,of,,,,,the,,,,,building,,,,,as,,,,,a,,,,,tube;,,,,,the,,,,,World,,,,,Trade,,,,,Center,,,,,buildings,,,,,are,,,,,another,,,,,example,,,,,of,,,,,this,,,,,tube,,,,,approach.,,,,,In,,,,,contrast,,,,,,rigid,,,,,frames,,,,,or,,,,,vertical,,,,,trusses,,,,