结构工程师2017，Vol.33Issue(1)：32-42,11.
近断层脉冲型地震动作用下RC框架结构抗整体性倒塌能力分析
Investigation on Global Collapse Resistant Capacity of RC Frame under Near-fault Pulse-type Ground Motions
摘要
Abstract
First,the cause and main characteristics of pulse-type ground motion in the near-fault regions were introduced briefly and selection of near-fault pulse-type ground motion records based on Peak-to-Peak Velocity (PPV) and Normalized Cumulative Squared Velocity (NCSV) were discussed.Then,a 6-story reinforced concrete frame with 3 bays was taken as a case study and the analytical model was built via OpenSees.20 nearfault pulse-type ground motion records were selected and spectral acceleration at the fundamental period of the structure,Sa (T1) was taken as intensity measure to scale the original ground motion records to conduct incremental dynamic analysis (IDA) on the structure.Maximum interstory drift ratio of the structure θmax and maximum interstory drift ratio θ max i of each floor were chosen as damage measures to obtain the IDA curves of the structure.Furthermore,the global collapse resistant capacity was derived and the damage distribution of the structure was evaluated based on the IDA results.Meanwhile,the same analysis was conducted under chosen 20 far-field ground motion records for comparison.Comparison of the results shows that with the same intensity measure,near-fault pulse-type ground motion is more likely to cause damage to the structure.The global collapse resistant capacity of the structure under near-fault pulse-type ground motion is lower than that under far-field ground motion.For a multi-story reinforced concrete frame structure,plastic deformation is concentrated more at the first floor of the structure.关键词
近断层地震动/速度脉冲效应/抗整体性倒塌能力/增量动力分析Key words
near-fault ground motion/velocity pulse/global collapse resistant capacity/incremental dynamic analysis引用本文复制引用
韩建平,张丽丽,徐阳..近断层脉冲型地震动作用下RC框架结构抗整体性倒塌能力分析[J].结构工程师,2017,33(1):32-42,11.基金项目
国家自然科学基金项目(51268036) （51268036）
国家自然科学基金项目(51578273) （51578273）
