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首页> 外文期刊>Journal of Earthquake Engineering >VISCOUS DAMPING IN SEISMIC DESIGN AND ANALYSIS
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VISCOUS DAMPING IN SEISMIC DESIGN AND ANALYSIS

机译：减震设计与分析中的粘性阻尼

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摘要

The characterisation of viscous damping in time history analysis is discussed in this paper. Although it has been more common in the past to use a constant damping coefficient for single-degree-of-freedom time history analyses, it is contended that tangent-stiffness proportional damping is a more realistic assumption for inelastic systems. Analyses are reported showing the difference in peak displacement response of single-degree-of-freedom systems with various hysteretic characteristics analysed with 5% initial-stiffness or tangent-stiffness proportional damping. The difference is found to be significant, and dependent on hysteresis rule, ductility level and period. The relationship between the level of elastic viscous damping assumed in time-history analysis, and the value adopted in Direct Displacement-Based Design is investigated. It is shown that the difference in characteristic stiffness between time-history analysis (i.e. the initial stiffness) and displacement based design (the secant stiffness to maximum response) requires a modification to the elastic viscous damping added to the hysteretic damping in Direct Displacement-Based Design.
机译：本文讨论了时程分析中的粘性阻尼特性。尽管过去在单自由度时程分析中使用恒定的阻尼系数更为普遍，但仍认为对于非弹性系统，切线刚度比例阻尼是更现实的假设。分析报告显示，具有5％初始刚度或切线刚度比例阻尼的各种滞后特性的单自由度系统的峰值位移响应有所不同。发现差异是显着的，并且取决于磁滞规则，延展性水平和周期。研究了时程分析中假设的弹性粘滞阻尼水平与基于直接位移的设计中采用的值之间的关系。结果表明，时程分析（即初始刚度）和基于位移的设计（正割刚度至最大响应）之间的特征刚度差异需要对基于直接位移的滞后阻尼中的弹性粘性阻尼进行修改。设计。

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