Kormanikova Eva, Kotrasova Kamila, Melcer Jozef, Valaskova Veronika
Faculty of Civil Engineering, Technical University of Kosice, 042 00 Kosice, Slovakia.
Faculty of Civil Engineering, University of Zilina, 010 08 Zilina, Slovakia.
Polymers (Basel). 2022 Feb 20;14(4):812. doi: 10.3390/polym14040812.
In modern industry, heavy traditional materials are being substituted with light and strong fibre-reinforced polymer composite materials. Bridges and railroads made of composite laminates are considerably affected by traffic loads. Therefore, it is very important to analyse this effect which would find practical applications in engineering designs. This paper explains the theoretical formulation that governs the dynamic response of a composite beam subjected to a moving load. The governing equations for the dynamic effect on the laminated composite bridge beam are explained here. The main theories in the micro-macro modelling of composite laminates are also described in the paper. Within the macro modelling, the Classical Laminate and Shear Deformation Laminate Theory of beams are presented. The symmetric cross-ply laminated bridge, made of boron/epoxy is under consideration. The computational two-dimensional model of the vehicle is adopted. The governing equations for the dynamic effect on the laminated composite bridge beam are explained. The calculation of the time response of the bridge for the characteristic speeds of the vehicle is performed in the environment of the MATLAB software. The maximum dynamic magnification factor for the dynamic analysis of a composite beam is found.
在现代工业中，重型传统材料正被轻质且高强度的纤维增强聚合物复合材料所取代。由复合层压板制成的桥梁和铁路受到交通荷载的显著影响。因此，分析这种影响在工程设计中具有实际应用价值，这一点非常重要。本文阐述了支配承受移动荷载的复合梁动态响应的理论公式。这里解释了层压复合桥梁梁动态效应的控制方程。本文还描述了复合层压板微观 - 宏观建模中的主要理论。在宏观建模中，给出了梁的经典层合理论和剪切变形层合理论。考虑的是由硼/环氧树脂制成的对称交叉铺层层压桥梁。采用了车辆的二维计算模型。解释了层压复合桥梁梁动态效应的控制方程。在MATLAB软件环境中对车辆特征速度下桥梁的时间响应进行了计算。找到了复合梁动态分析的最大动态放大系数。
