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首页> 外文期刊>Journal of Earthquake Engineering >EQUIVALENT VISCOUS DAMPING EQUATIONS FOR DIRECT DISPLACEMENT BASED DESIGN
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EQUIVALENT VISCOUS DAMPING EQUATIONS FOR DIRECT DISPLACEMENT BASED DESIGN

机译：基于直接位移的等效粘性阻尼方程设计

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摘要

Estimation of equivalent viscous damping is an important step in the methodology of the direct displacement based design. Errors in the estimation of this parameter may lead to consequent errors in the ductility demand of the designed elements. Equivalent viscous damping estimated by Jacobsen's approach for steady-state harmonic response are compared with effective damping factors obtained from an iterative procedure using time — history analyses of single-degree-of-freedom systems. In order to separate the effects of elastic-viscous and hysteretic damping the designs and analyses were carried without elastic viscous damping. Six hysteretic models representing a wide range of hysteretic energy absorption characteristics and six artificial records were used in the analysis. It is found that in general Jacobsen's approach overestimates the values for equivalent viscous damping. Based on the analytical results, modified design equations for equivalent viscous damping are proposed.
机译：等效粘性阻尼的估计是基于直接位移的设计方法中的重要一步。该参数估计中的错误可能会导致设计元素的延性要求随之发生错误。将雅各布森（Jacobsen）方法估算的稳态谐波响应的等效粘性阻尼与通过使用单自由度系统的时间-历史分析进行的迭代过程获得的有效阻尼因子进行比较。为了分离弹性粘滞阻尼和滞后阻尼的影响，进行了设计和分析，而没有弹性粘滞阻尼。分析中使用了六个代表各种滞回能量吸收特性的滞回模型和六个人工记录。可以发现，一般而言，雅各布森的方法会高估等效粘性阻尼的值。根据分析结果，提出了等效粘性阻尼的改进设计方程。

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