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运用大型通用有限元软件SAP2000,对V形连续刚构梁拱组合桥进行模拟,计算并提取其前12阶自振频率及对应的阵型,分析结果表明,上部结构拱肋的横向振动出现得较早,主梁的竖向、横向及扭转一阶振动与二阶以上振动频率随频率的提高,振动呈现出交替出现的特点,低阶与高阶振型均出现对称反对称振动。
The large-scale general finite element software SAP2000 was used to simulate the V-shaped continuous rigid-frame beam-arch composite bridge, and the first 12 natural frequencies and the corresponding formation types were calculated and extracted. The analysis results show that the transverse vibration of the arch rib of the superstructure appears more The vertical, horizontal and torsional vibration of the main girder and the vibration frequency of the second order with the increase of the frequency of the early and main girders show the alternate appearance of vibration. Symmetric anti-symmetrical vibration appears in both the low and high modes.