Rapid evaluation of structural soundness of steel frames using a coupling coefficient (CC)-based method

使用基于耦合系数 (CC) 的方法快速评估钢框架的结构稳定性

• 批准号: 22KF0221
• 负责人: 倉田 真宏
• 金额: $ 1.34万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22KF0221/
• 关键词: 地震被災; 構造ヘルスモニタリング; 残存性能; 鋼構造

A method for evaluating the post-earthquake condition of steel frame structures based on the coupling coefficient (CC) has been developed. The CC is an index that reflects each story's internal force distribution and damage mechanism in frames, computed with the drift distribution at 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 structure's global and local working modes. Useful information is whether the damage to each story is mainly distributed on the beams or columns. An incremental dynamic analysis with an 18-story steel frame tested at the E-Defense shaking table facility confirmed that the identified structure's condition by the CC-based method corresponds to the damage information reported by visual inspection.

提出了一种基于耦合系数的钢框架结构震后状态评估方法。通过有限的监测数据和结构设计图纸估算出结构最大反应时的位移分布，计算出结构各层的内力分布和破坏机理，初步的有限元分析表明，结构的整体和局部工作模态等重要信息在位移反应中并不明显。有用的信息是每层的损伤是否主要分布在梁或柱上。在E-Defense振动台设施测试的18层钢框架的增量动态分析证实，基于CC的方法识别的结构条件对应于目视检查报告的损坏信息。

项目成果

Rapid evaluation of structural soundness of steel frames using a coupling coefficient (CC)‐based method

• DOI: 10.1002/eqe.3811
• 发表时间: 2023-01
• 期刊: Earthquake Engineering & Structural Dynamics
• 影响因子: 4.5
• 作者: Shao‐Dong Shen;M. Kurata