钢管混凝土拱桥动力特性及地震响应分析的中期报告.docx

钢管混凝土拱桥动力特性及地震响应分析的中期报告
摘要：
钢管混凝土拱桥是一种新型的桥梁结构，相比传统的拱桥结构，钢管混凝土拱桥具有更大的承载能力和更好的耐久性。本文旨在研究钢管混凝土拱桥的动力特性及地震响应。本文采用有限元方法进行数值模拟，建立了一种三维的数值模型，并通过分析模型的模态特征及反应谱，研究了钢管混凝土拱桥的动力响应特性。研究结果表明，钢管混凝土拱桥的固有频率较高，且受到地震作用时响应较为剧烈。本文进一步采用有限元法进行了地震响应分析，通过分析桥梁结构在不同地震动强度下的变形及位移，探讨了钢管混凝土拱桥在地震作用下的破坏机理及相关安全措施。
关键词：
钢管混凝土拱桥；动力特性；地震响应；有限元法；破坏机理
Abstract:
Steeltubeconcretearchbridgeisanewtypeofbridgestructure.Comparedwithtraditionalarchbridgestructure,steeltubeconcretearchbridgehaslargercarryingcapacityandbetterdurability.Thispaperaimstostudythedynamiccharacteristicsandseismicresponseofsteeltubeconcretearchbridges.Thefiniteelementmethodisusedfornumericalsimulation,andathree-dimensionalnumericalmodelisestablished.Thedynamicresponsecharacteristicsofsteeltubeconcretearchbridgesarestudiedbyanalyzingthemodalcharacteristicsandresponsespectraofthemodel.Theresearchresultsshowthatthenaturalfrequencyofsteeltubeconcretearchbridgeishigh,andtheresponseismoreintensewhenitissubjectedtoearthquake.Furthermore,theseismicresponseanalysisiscarriedoutbyusingthefiniteelementmethod.Thedeformationanddisplacementofthebridgestructureunderdifferentearthquakeintensitiesareanalyzed,andthefailuremechanismandrelevantsafetymeasuresofsteeltubeconcretearchbridgesunderearthquakearediscussed.
Keywords:
Steeltubeconcretearchbridge;dynamiccharacteristics;seismicresponse;finiteelementmethod;failuremechanism.