Amplitude-Dependent Damping in Vibration Serviceability: Case of a Laboratory Footbridge
Amplitude-Dependent Damping in Vibration Serviceability: Case of a Laboratory Footbridge
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振动适用性中的振幅相关阻尼：实验室人行天桥案例
DOI：
10.1061/(asce)ae.1943-5568.0000211
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发表时间：
2016
影响因子：
2
通讯作者：
Onur Avcı
中科院分区：
文献类型：
--
作者：
Onur Avcı
摘要在过去的几十年里，建筑技术的进步导致了结构系统中轻质和高强度材料的使用。虽然更长的跨度和更轻的材料导致地板系统具有更小的质量、刚度和阻尼，但无纸化办公室的趋势减少了阻尼和地板上的活荷载量。因此，结构变得更容易受到恼人的振动，振动的适用性已经成为一个值得关注的适用性领域。结构系统的阻尼值是计算结构系统抗振能力的关键参数。结构中的阻尼已被证明依赖于施加在结构上的力的振幅。这种情况被称为非线性阻尼，或振幅相关阻尼。虽然在低幅和高幅时阻尼是恒定的，但在幅值之间，阻尼值随着激励幅值的增加而增加。对于风和地震的激励，…
AbstractConstruction technology advancements in the last couple of decades have led to the use of lightweight and high-strength materials in structural systems. Although longer spans and lighter materials result in floor systems with less mass, stiffness, and damping, the trend toward a paperless office decreases damping and the amount of live load on the floors even more. Consequently, structures have become more vulnerable to annoying vibrations, and vibration serviceability has become an area of serviceability concern. For vibration serviceability calculations, the damping value of the structural systems is a critical parameter. Damping in structures has proved to be dependent on the amplitude of the applied force on the structure. This condition is referred to as nonlinear damping, or amplitude-dependent damping. Although damping is constant at low and high amplitudes, for in-between amplitudes, the damping value increases with the levels of excitation amplitude. For wind and earthquake excitations, t...