Damping is known to have a considerable influence on the dynamic behavior of bridges. The fixed damping ratios recommended in design codes do not necessarily represent the complicated damping characteristics of bridge structures. This study investigated the application of stress-dependent damping associated with vehicle-bridge coupling vibration and based on that investigation proposed the stress-dependent damping ratio. The results of the investigation show that the stress-dependent damping ratio is significantly different from the constant damping ratio (5%) defined in the standard specification. When vehicles travel at speeds of 30, 60, and 90, the damping ratios of the bridge model are 3.656%, 3.658%, and 3.671%, respectively. The peak accelerations using the regular damping ratio are 18.9%, 21.3%, and 14.5% of the stress-dependent damping ratio, respectively. When the vehicle load on the bridge is doubled, the peak acceleration of the mid-span node increases by 5.4 times, and the stress-related damping ratio increases by 2.1%. A corrugated steel-web bridge is being used as a case study, and the vibration response of the bridge is compared with the measured results. The acceleration response of the bridge which was calculated using the stress-dependent damping ratio is significantly closer to the measured acceleration response than that using the regular damping ratio.

众所周知，阻尼对桥梁的动态行为有相当大的影响。设计规范中推荐的固定阻尼比不一定代表桥梁结构复杂的阻尼特性。本研究研究了与车桥耦合振动相关的应力相关阻尼的应用，并在此研究的基础上提出了应力相关阻尼比。调查结果表明，应力相关阻尼比与标准规范中定义的恒定阻尼比 (5%) 有显着差异。当车辆以 30、60 和 90 的速度行驶时，桥梁模型的阻尼比分别为 3.656%、3.658% 和 3.671%。使用常规阻尼比的峰值加速度分别为 18.9%、21.3% 和 14。分别为应力相关阻尼比的 5%。当桥梁上的车辆荷载增加一倍时，跨中节点的峰值加速度增加了5.4倍，应力相关阻尼比增加了2.1%。以波纹钢腹板桥为例，将桥的振动响应与实测结果进行比较。使用应力相关阻尼比计算的桥梁加速度响应比使用常规阻尼比计算的加速度响应更接近实测加速度响应。并将桥梁的振动响应与实测结果进行比较。使用应力相关阻尼比计算的桥梁加速度响应比使用常规阻尼比计算的加速度响应更接近实测加速度响应。并将桥梁的振动响应与实测结果进行比较。使用应力相关阻尼比计算的桥梁加速度响应比使用常规阻尼比计算的加速度响应更接近实测加速度响应。