Simple connections retrofitted by dampers and bracket-tendon system against progressive collapse

IF 0.9 Q4 ENGINEERING, CIVIL

Australian Journal of Structural Engineering Pub Date : 2021-08-11 DOI:10.1080/13287982.2021.1964207

M. Shirinzadeh, A. Haghollahi, Hassan Gomar

引用次数: 1

Abstract

ABSTRACT High potential for progressive collapse is one of the main weaknesses of structural frames with simple connections. Therefore, strengthening of this structural system is a necessity for both existing and new structures. In this study, the current simple connection with double web angles and one seat angle is modified by using dampers and a bracket-tendon system. The proposed methods of improvement increase the connection performance against progressive collapse due to column removal significantly, while they hardly change the stiffness and rigidity of the connections. Finite element software, ABAQUS, is used for this assessment. Vertical displacement of the modified connections after removal of the column is compared as an evaluation criterion. The results indicate that the bracket-tendon system is quite effective in reduction of vertical displacement of the connection up to 46%, and applying of dampers enhances the performance of the connections notably from 20% to 58%.

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简单的连接通过阻尼器和支架-肌腱系统进行改造，以防止逐渐坍塌

摘要简单连接结构框架的主要弱点之一是潜在的持续倒塌。因此，加强这一结构体系对于现有的和新的结构都是必要的。本文采用阻尼器和支架-腱系统对现有的双腹板角、单座角简单连接进行了改进。提出的改进方法显著提高了节点抗拔柱累进破坏的性能，但几乎没有改变节点的刚度和刚度。有限元软件ABAQUS用于此评估。将拆柱后修改节点的竖向位移作为评价标准进行比较。结果表明，支架-肌腱体系可有效降低连接的竖向位移达46%，阻尼器的应用可显著提高连接的性能，降幅达20% ~ 58%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Australian Journal of Structural Engineering ENGINEERING, CIVIL-

CiteScore

2.50

自引率

0.00%

发文量

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.