土木工程外文翻译-原文.doc

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1、外文原文Responseofareinforcedconcreteinfilled-framestructuretoremovaloftwoadjacentcolumnsMehrdadSasani_NortheasternUniversity,400SnellEngineeringCenter,Boston,MA02115,UnitedStatesReceived27June2007;receivedinrevisedform26December2007;accepted24January2008Availableonline19March2008AbstractTheresp

2、onseofHotelSanDiego,asix-storyreinforcedconcreteinfilled-framestructure,isevaluatedfollowingthesimultaneousremovaloftwoadjacentexteriorcolumns.AnalyticalmodelsofthestructureusingtheFiniteElementMethodaswellastheAppliedElementMethodareusedtocalculateglobalandlocaldeformations.Theanalyticalres

3、ultsshowgoodagreementwithexperimentaldata.Thestructureresistedprogressivecollapsewithameasuredmaximumverticaldisplacementofonlyonequarterofaninch(6.4mm).Deformationpropagationovertheheightofthestructureandthedynamicloadredistributionfollowingthecolumnremovalareexperimentallyandanalyticallyev

4、aluatedanddescribed.Thedifferencebetweenaxialandflexuralwavepropagationsisdiscussed.Three-dimensionalVierendeel(frame)actionofthetransverseandlongitudinalframeswiththeparticipationofinfillwallsisidentifiedasthemajormechanismforredistributionofloadsinthestructure.Theeffectsoftwopotentialbritt

5、lemodesoffailure(fractureofbeamsectionswithouttensilereinforcementandreinforcingbarpullout)aredescribed.Theresponseofthestructureduetoadditionalgravityloadsandintheabsenceofinfillwallsisanalyticallyevaluated.c2008ElsevierLtd.Allrightsreserved.Keywords:Progressivecollapse;Loadredistribution;L

6、oadresistance;Dynamicresponse;Nonlinearanalysis;Brittlefailure1.IntroductionThe principal scope of specifications is to provide general principles and computational methods in order to verify safety of structures. The “ safety factor ”, which according to modern trends is independent of the 

7、nature and combination of the materials used, can usually be defined as the ratio between the conditions. This ratio is also proportional to the inverse of the probability ( risk ) of failure of the structure.  Failure has to be considered not only