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本文收集和分析了三座典型桥梁的阻尼比测试结果,该研究发现:桥梁的阻尼比不是定值,激励方式、桥梁类型、阻尼比的计算方法、环境均对阻尼比有明显的影响。跑车激励下的阻尼比大于环境脉动激励下的阻尼比。激励越强,实测阻尼比越大。相同激励情况下,不同的阻尼比计算方法所得的阻尼比差值较大。
In this paper, the damping ratio test results of three typical bridges are collected and analyzed. The results show that the damping ratio of the bridge is not constant, and the excitation method, the type of bridge, the calculation method of damping ratio, and the environment all have significant effects on the damping ratio. The damping ratio under the excitement of the sports car is greater than the damping ratio under the excitation of the environment pulsation. The stronger the incentive, the greater the measured damping ratio. Under the same excitation conditions, the damping ratio obtained by different damping ratio calculation method is larger.