【摘要】 文章以重庆某预应力钢筋混凝土箱型拱桥为例,利用有限元分析程序SAP2000建立了桥梁有限元模型,对该拱桥模型进行动力特性分析,通过模态分析和时程分析研究了该拱桥在各阶模态下的振动周期、频率以及变形情况,为桥梁的健康监测系统在关键位置布置传感器提供依据,并得出一些有益的结论。更多还原

【Abstract】 With a prestressed reinforced concrete box-type arch bridge in Chongqing as the example,this article established the finite element model of the bridge by using the finite element analysis program SAP2000,conducted the dynamic characteristics analysis of this arch bridge model,and through modal analysis and time-history analysis,it studied the vibration cycle,frequency and deformation of this bridge under various modes,thereby providing the basis for arranging the sensors at key positions for the health monitoring system of the bridge,and drawing some useful conclusions.更多还原