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一、钢桥振动问题的提出钢桥的振动问题,包括应力以及安全破坏等。在应力方面,众所熟知的是研究竖向振动的动荷系数,即冲击系数,这是一百多午来的研究对象。在安全破环问题方面,有实际例子,第二次世界大战期间,美国有座大跨度悬索桥因风力产生振动而破坏。此外,有些振动,特别是水平横向振动,影响到行人和车辆的安全通行。如果车辆过桥时,桥振动得厉害,车辆就得减速。我们现在所探讨的就是关于这方面的问题。
First, the steel bridge vibration problems Steel bridge vibration issues, including stress and security damage. In terms of stress, it is well known that the dynamic load coefficient of vertical vibration, that is, the impact coefficient, is the object of study for over a hundred years. In the area of safety breakdowns, there are practical examples. During the Second World War, a large-span suspension bridge in the United States was damaged by wind. In addition, some vibrations, especially horizontal and horizontal vibrations, affect the safe passage of pedestrians and vehicles. If the vehicle crosses the bridge, the bridge vibrates so badly that the vehicle has to slow down. What we are discussing now is about this issue.