Whenaneight-lanesteel-truss-archbridgeacrosstheMississippiRiverinMinneapoliscollapsedduringtheeveningrushhouronAugust1st2007,13peoplewerekilledand145wereinjured.Therehadbeennowarning.Thebridgewas40yearsoldbuthadalifeexpectancyof50years.Thecentralspansuddenlygavewayafterthegussetplatesthatconnectedthesteelbeamsbuckledandfractured,droppingthebridgeintotheriver.Eight-lane车道,行车线2小路,小巷Truss一捆,一束,构架Arch拱,拱门Expectancy期待;期望Span跨度,跨径Giveway撤退,让路,退让,垮掉,倒塌,屈服,跌价Gusset衣袖,甲胄Plate盘Beam梁,横梁Buckle带扣Fractured断裂的Inthewakeofthecatastrophe,therewerecallstoharnesstechnologytoavoidsimilarmishaps.AnthonyFallsbridge,whichopenedonSeptember18th,2008andreplacethecollapsedstructure,shoulddojustthat.Ithasanembeddedearly-warningsystemmadeofhundredsofsensors.Theyincludewireandfibre-opticanddisplacementgauges,accelerometers,potentiometersandcorrosionsensorsthathavebeenbuiltintothespantomonitoritforstructuralweaknesses,suchascorrodedconcreteandoverlystrainedjoints.,inthewakeof就是随后/因某件事...的意思HarnessInthewakeofthecatastrophe,therewerecallstoharnesstechnologytoavoidsimilarmishaps.HYPERLINK"http://dict.youdao.com/search?le=eng&q=harness%20technology&keyfrom=dict.index"\o"点击发音"灾难过后，有人提出用技术手段避免类似的不幸。Mishaps灾祸；不幸事故ThenewMinneapolisbridgejoinsahandfulof“smart”bridgethatbuilt-insensorstomonitortheirhealth.Anotherexampleisthesix-laneCharilaosTtikoupisbridgeinGreece,whichspanstheGulfofCorinth,linkingthetownofRioonthePeloponnesepeninsulartoAntirrioonthemainland.The3km-longbridge,whichwasopenedin2004,hasroughly300sensorsthatalertitsoperatorsifanearthquakeorhighwindswarrantitbeingshuttotraffic,aswellasmonitoringitsoverallhealth.Thesesensorshavealreadydetectedsomeabnormalvibrationsinthecablesholdingthebridge.Engineerstheninstalledadditionalweightsasdampers.Alertadj.警觉的，警惕的，注意的；思维敏捷的；活泼的n.警报；警戒状态vt.向……报警warrantn.授权证；许可证；正当理由；依据vt.保证，担保；授权，批准；辩解overalladj.全部的；全体的；一切在内的；综合的adv.全面地；总地；总的说来n.工装裤；罩衫；〈英〉（军官的）紧身军裤vibrate振动[颤动]cable(船只、桥梁等上的)巨缆,钢索(尤指10英寸或10英寸以上的)缆索；钢丝绳damper减震器Th