| 隔震结构动力弹塑性分析地震记录选择的波谱分类法研究 |
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| 引用本文： | 刘文光,刘阳,何文福,杨巧荣.隔震结构动力弹塑性分析地震记录选择的波谱分类法研究[J].建筑结构学报,2015,36(7):106-114. |
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| 作者姓名： | 刘文光 刘阳 何文福 杨巧荣 |
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| 作者单位： | 1.上海大学 土木工程系，上海 200072； 2.上海宝冶集团有限公司，上海 200941； 3.同济大学 土木工程学院，上海 200092 |
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| 基金项目： | 国家自然科学基金项目（51278291），上海市自然科学基金项目(15ZR1416200)。 |
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| 摘 要： | 高层隔震结构动力弹塑性时程分析地震记录选择是隔震结构地震响应分析的关键，针对地震记录选取提出基于模糊聚类算法结合地震动强度指标进行地震波子集选取的波谱分类法。首先采用动力弹塑性时程方法对隔震结构的等效单自由度简化模型和三维空间模型进行了地震加速度峰值、地震波速度峰值、地震波位移峰值、地震波速度峰值与加速度峰值之比、加速度反应谱、等效速度反应谱6类地震动强度指标与工程需求参数相关性的比较研究，确定了适合隔震结构的有效地震动强度指标。隔震整体结构工程需求参数包含上部结构层间变形、顶层加速度和隔震层位移响应。其后采用构造的地震动指标矩阵应用于地震波样本属性的表征，并基于模糊聚类算法对地震波样本进行了分类。以某15层高层钢框架-混凝土核心筒隔震结构为例，通过将未分类的地震波集合与分类地震波子集作用下结构的地震响应离散性对比研究，确认了波谱分类法在地震动筛选应用中的有效性。
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| 关 键 词： | 地震动强度指标 地震记录 隔震结构 模糊聚类算法 相关性 |
Wave spectrum classification method of seismic records selection for isolated structure dynamic elasto-plastic analysis |
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| LIU Wenguang,LIU Yang,HE Wenfu,YANG Qiaorong.Wave spectrum classification method of seismic records selection for isolated structure dynamic elasto-plastic analysis[J].Journal of Building Structures,2015,36(7):106-114. |
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| Authors: | LIU Wenguang LIU Yang HE Wenfu YANG Qiaorong |
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| Affiliation: | 1.Department of Civil Engineering, Shanghai University, Shanghai 200072, China；;
2.Shanghai Baoye Group Co., Ltd, Shanghai 200941, China;
3.College of Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Seismic records selection procedure for dynamic elasto-plastic time history analysis of high-rise isolated structure has always been the key problem for seismic response analysis of the isolation structure. Aiming at seismic records selection, the wave spectrum classification method (WSCM) was proposed based on a combination of fuzzy clustering method (FCM) and seismic intensity measure (IM) index evaluation method. Firstly, comparative analysis about correlation of engineering demand parameters (EDP) and six kinds of IMs including peak ground acceleration(PGA), peak ground velocity(PGV), peak ground displacement, ratio of PGV to PGA, spectral acceleration and equivalent speed spectrum were done by dynamic elasto-plastic time history analysis of simplified equivalent single degree-of-freedom (SDOF) model and three dimensional high-rise isolated structure. The suitable effective seismic intensity index for seismic isolated structure was determined. Superstructure story deformation, roof acceleration and isolation layer displacement are choosed as EDP. Then, the IM matrix proposed was used for the representation of the properties of earthquake wave samples. The earthquake wave samples were classified based on fuzzy clustering algorithm. Finally, the effectiveness of WSCM for the application of seismic records selection was verified through the comparison of seismic responses of a 15-story high-rise steel frame-concrete core wall isolated structure under unclassified earthquake set and selected subset. |
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| Keywords: | correlation fuzzy clustering method ground motion intensity measure isolated structure seismic record |
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