A novel method for efficient design of frame structures equipped with nonlinear viscous dampers by using computational results of cylindrical friction damper
H. Mousavi, S. Sabbagh Yazdi, M. Almohammad-albakkar
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引用次数: 2
Abstract
ABSTRACT In this paper, a new method is presented for designing nonlinear viscous dampers to improve the seismic response of multi-storey frames with braces. In this regard, a 2/3-scale three-storey steel structure is used as a benchmark case. Considering the cylindrical friction damper equipment on the bracings, the optimum slip loads are calculated for cylindrical friction damper of all stories under selected earthquakes records. For three earthquakes in optimised slip loads, the force versus the difference between velocities of two ends of cylindrical friction dampers for all stories is combined and plotted according to the velocity range for all earthquakes. Finally, the velocity–force curve is fitted and used for finding the design parameter of nonlinear viscous dampers. Similarly, the aforementioned steps are applied for El-Centro with three scales (of 50, 100 and 200% El Centro). According to the analysis results, the viscous dampers which are designed by using this approach present better performance than that of cylindrical friction dampers and considerably reduce the structural response. The values of displacement, acceleration and base shear are reduced between 63–96%, 44–85% and 14–78%, respectively. Moreover, the results of viscous dampers designed using three and one earthquakes are very similar.
本文提出了一种设计非线性粘性阻尼器的新方法，以改善带支撑的多层框架的地震响应。在这方面，采用了一个2/3比例的三层钢结构作为基准案例。考虑支撑柱上的圆柱摩擦减振器装置，在选定的地震记录下，计算了各层圆柱摩擦减振器的最佳滑移荷载。对于优化滑动载荷下的三次地震，根据所有地震的速度范围，将所有楼层的力与圆柱形摩擦阻尼器两端的速度差进行组合并绘制。最后，对速度-力曲线进行拟合，求出非线性粘性阻尼器的设计参数。同样，上述步骤适用于El-Centro的三个尺度(50,100和200% El Centro)。分析结果表明，采用该方法设计的粘性阻尼器性能优于圆柱摩擦阻尼器，并能显著降低结构响应。位移、加速度和基底剪切值分别减小63-96%、44-85%和14-78%。此外，用三次地震和一次地震设计粘性阻尼器的结果非常相似。
期刊介绍：
The Australian Journal of Structural Engineering (AJSE) is published under the auspices of the Structural College Board of Engineers Australia. It fulfils part of the Board''s mission for Continuing Professional Development. The journal also offers a means for exchange and interaction of scientific and professional issues and technical developments. The journal is open to members and non-members of Engineers Australia. Original papers on research and development (Technical Papers) and professional matters and achievements (Professional Papers) in all areas relevant to the science, art and practice of structural engineering are considered for possible publication. All papers and technical notes are peer-reviewed. The fundamental criterion for acceptance for publication is the intellectual and professional value of the contribution. Occasionally, papers previously published in essentially the same form elsewhere may be considered for publication. In this case acknowledgement to prior publication must be included in a footnote on page one of the manuscript. These papers are peer-reviewed as new submissions. The length of acceptable contributions typically should not exceed 4,000 to 5,000 word equivalents. Longer manuscripts may be considered at the discretion of the Editor. Technical Notes typically should not exceed about 1,000 word equivalents. Discussions on a Paper or Note published in the AJSE are welcomed. Discussions must address significant matters related to the content of a Paper or Technical Note and may include supplementary and critical comments and questions regarding content.
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