重力和粘结性能对RC梁冲击位移及尺度效应的影响分析

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中图分类号：TU375.1 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202312058

Abstract;Dutotelitatiosoftcotandoditios，tpredictioonthesponseofprototeful-sizedeamsasedonthealeddowtestresultssicalilaritywshsbcoeaommontecqe.Toivetgateethrthasicasilaritylisaliduder impactloading，umericalanalysisofthecalingefectothemidspandisplacementofRCbeamsunderdrophammerimpactwascaedou. AfiniteelementmodelofgeometricallsimilarRCbeamsconsideringgravityandreinforcement-concretebond-sliprelationshipwas developed.Thenomalizedmid-spandisplacementimehistoriesandthepeakvaluesofgeometricallysimilarbeamswrecomparedThe ffects ofplastic，damage，gravityandondintepeak mid-spandisplacementofCbeamsandtheirsalingeffects rediscussde resultsshowedthat：underlow-velityimpacts，tepakidspandisplacementsofRCbeasdootsatisfthasicalsiilariylawte normaliedpeakandesidualidsandisplacements gadallincreasewiticreasingstructralizlasticbamsareincosistentihte lawsofimpactdispacemetsalingeectfoelasic-plastcndRCbasbothplasticityaddmageareooftheeasosoftpact displacementscalingefect;afterconsideringtheingleorcombinedeectsofgravityandbondlpthemid-spanpeakdisplacentofC beamsncreassndthaligeectisaned;itisecommededtoosderteectsofgavitydodslpcodctilovelocityimpactnumericalstudiesonlarge-sizedorprototypeRCbeamstoensuretheacuracyofidspanpeak displacementsultsand improve the reliability of using peak displacement for evaluation or prediction.

Keywords： structural engineering; low velocity impact; numerical analysis; RC beam; scaling effect

为满足日益增长的功能与性能需求，土木工程结构正不断向超高、超深、超长及超大跨度发展。（剩余17029字）