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首页> 外文期刊>International journal of steel structures >Probabilistic Seismic Assessment of SMFs with Drilled Flange Connections Subjected to Near-Field Ground Motions
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Probabilistic Seismic Assessment of SMFs with Drilled Flange Connections Subjected to Near-Field Ground Motions

机译：具有近场地震动的带法兰连接的SMF的概率地震评估

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摘要

This paper aims to probabilistically evaluate the influences of drilled flange (DF) connection on seismic performance of steel moment frames (SMFs) incorporating near-field ground motions. Meanwhile, reduce beam section (RBS) connection as a prequalified connection and pre-Northridge welded unreinforced flange (WUF) connection were compared with DF connection. To model accurately the components of RBS and WUF connections and panel zone in SMFs, the proposed models of former researches were utilized. However, to simulate all DF connections the hinge properties were extracted from experimentally validated finite element models. Two sample low- and high-rise buildings were designed based on valid codes and simulated by OpenSees platform in order to study the nonlinear performance of aforementioned connections. Incremental dynamic analysis process was carried out to assess comprehensively the effect of DF connection on structural response and probability of structural instability for various intensity of seismic loads. Then, the seismic risk for Collapse Prevention and immediate occupancy limit states were calculated by fragility analysis. Also, seismic demand hazard curves for the sample buildings were extracted. The results of this study indicated that DF connections provided acceptable seismic performance as well as RBS connections in low- and high-rise buildings.
机译：本文旨在概率评估结合近场地面运动的钻孔法兰（DF）连接对钢矩框架（SMF）抗震性能的影响。同时，将减小梁截面（RBS）连接作为合格连接和将Northridge焊接前无筋法兰（WUF）连接与DF连接进行了比较。为了准确地建模SMF中RBS和WUF连接的组件以及面板区域，使用了先前研究的建议模型。但是，为了模拟所有DF连接，从实验验证的有限元模型中提取了铰链属性。为了研究上述连接的非线性性能，根据有效代码设计了两座低层和高层建筑样本，并通过OpenSees平台进行了仿真。进行了增量动力分析过程，以全面评估DF连接对各种地震荷载强度下结构响应和结构失稳概率的影响。然后，通过脆性分析计算出了防塌地震风险和即时占用极限状态。此外，还提取了样本建筑物的地震需求危险曲线。这项研究的结果表明，在低层和高层建筑中，DF连接提供了可接受的抗震性能以及RBS连接。

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