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对处于土耳其地震多发地区的某4跨双线铁路桥梁的动力特性和地震作用进行评估。采用通用有限元软件,建立桥梁的三维计算模型。对桥梁进行现场测试,如:静、动力及材料试验,验证了有限元模型的正确性。考虑列车和地震荷载,以及结构评估结果,并利用桥梁的三维修正模型进行必要的计算。借助附加杆件,将地震荷载传递给支撑。着重研究由于卡车撞击而产生永久缺陷的第4跨,结果表明,由于承载力不足,需要更换第4跨。
The dynamic characteristics and the seismic effects of a 4-span double-track railway bridge in areas with frequent earthquakes in Turkey are evaluated. The common finite element software is used to establish the 3D calculation model of the bridge. On-site testing of the bridge, such as: static, dynamic and material testing, verify the correctness of the finite element model. Consider the train and seismic loads, as well as the structural assessment results, and make the necessary calculations using the bridge’s 3D correction model. Earthquake loads are transmitted to the support by means of additional rods. Emphasis was placed on the fourth cross that produced permanent defects as a result of a truck impact and the results showed that the fourth cross was required due to insufficient bearing capacity.