Rapid evaluation of structural soundness of steel frames using a coupling coefficient (CC)‐based method
Rapid evaluation of structural soundness of steel frames using a coupling coefficient (CC)‐based method
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DOI：
10.1002/eqe.3811
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发表时间：
2023-01
影响因子：
4.5
通讯作者：
Shao‐Dong Shen;M. Kurata
中科院分区：
文献类型：
--
作者：
Shao‐Dong Shen;M. Kurata
提出了一种基于耦合系数CC的钢框架结构震后状态评估方法。结构的承载力是反映框架结构各层内力分布和破坏机理的指标。它是利用有限的监测数据和目标结构的设计图纸估计的最大结构响应的漂移分布计算的。初步的有限元分析表明，CC包含一些重要的信息，是不明显的位移响应，如整体和局部工作模式的结构。这类有用的信息包括各层的损伤是否主要分布在梁或柱上。在E-Defense振动台设施中对一个18层钢框架进行的增量动力分析证实，基于CC的方法识别的结构条件与目视检查报告的损伤信息相对应。分析结果验证了基于CC的方法的理论，并为钢框架的损伤等级提供了限值。
A method is proposed for evaluating the post‐earthquake condition of steel frame structures based on the coupling coefficient (CC). The CC is an index that reflects the internal force distribution of each storey and damage mechanism in frames. It is computed using the drift distribution of the maximum structural response estimated from limited monitoring data and the design drawings of the target structure. Preliminary finite element analyses showed that the CC contains some important information that is not obvious in displacement responses, such as the global and local working modes of the structure. Useful information of this type includes whether the damage to each storey is mainly distributed on the beams or columns. An incremental dynamic analysis with an 18‐storey steel frame tested at the E‐Defense shaking table facility confirmed that the structural condition identified by the CC‐based method corresponds to the damage information reported by visual inspection. The analysis results verify the theory of the CC‐based method and provide limit values for the damage grades of steel frames.