Assessment of the seismic capacity of mainshock-damaged reinforced concrete columns

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• 作者：A. Moshref ; M. Khanmohammadi ; M. Tehranizadeh
• 关键词：Modification factors ; Aftershocks ; Residual displacement ; Fragility functions ; Visual damage indicators
• 刊名：Bulletin of Earthquake Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：15
• 期：1
• 页码：291-311
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Geotechnical Engineering & Applied Earth Sciences; Environmental Engineering/Biotechnology; Civil Engineering; Geophysics/Geodesy; Hydrogeology; Structural Geology;
• 出版者：Springer Netherlands
• ISSN：1573-1456
• 卷排序：15

文摘

The objective of this study is to assess the post-earthquake capacity of reinforced concrete columns jointly using visual damage indicators and residual displacement. For this purpose, incremental dynamic analysis (IDA) is performed on the studied columns to correlate the maximum and residual drift ratios. Next, a method is developed to compute the fragilities of mainshock-damaged columns by performing IDA with a sequence of mainshock–aftershock ground motions. In this analysis, the mainshock is scaled to reach a particular damage state and after 5 s of rest time, aftershock ground motions are applied on the damaged columns. Then, the aftershock is scaled to result in collapse. Using the proposed methodology and the results of the IDA, fragility curves are developed for the damaged columns. Finally, modification factors are proposed to consider the effect of mainshock damage on the capacity curve of RC columns.