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通过对新加坡某座跨径 10 0m的曲线斜拉桥动力反应的足尺模型实验及对实验结果与自由振动分析的对比表明 ,梁端约束方式的模拟是一个重要的因素 ,而斜拉索及应力集中影响的模拟却并不重要 ,除非拉索模型和弱刚度的上部结构相互作用协调 ,且能在测量响应中表现出来。只有清楚地了解锚固刚度及质量分布 ,否则 ,从诱导振动中获得索的张力也是不精确的。但环境振动测试技术对这种尺寸的结构是很适合的。
Through a full-scale model experiment on a dynamic response of a cable-stayed bridge with a span of 100m in Singapore and comparison of the experimental results with the free vibration analysis, it is shown that the simulation of the beam-end restraint mode is an important factor. However, Simulation of the effect of stress concentration is not important unless the cable model and the superstructure of weak stiffness interact well and can manifest themselves in the measurement response. Only a clear understanding of the anchorage stiffness and mass distribution is otherwise inaccurate to obtain the tension of the cable from the induced vibration. However, environmental vibration testing techniques are well suited for this size structure.