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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Anchor-yield exposed column bases for minimizing residual deformations in seismic-resistant steel moment frames
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Anchor-yield exposed column bases for minimizing residual deformations in seismic-resistant steel moment frames

机译：锚固曝光柱碱基，以使抗震钢力矩框架中的残余变形最小化

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摘要

This paper explores the concept of dissipative exposed column base connections by means of anchor rod yielding. This concept aims at enhancing the seismic performance of low-rise steel moment-resisting frames (MRFs). A mechanics-based model is proposed that explicitly simulates a broad range of damage mechanisms observed in exposed column bases. The model is implemented in a frame finite element analysis program, and its hysteretic performance is validated with experimental data available in literature. Incorporating this modeling feature in standard nonlinear response history analyses offers new insights in steel MRF responses. It is shown that when low-rise steel MRFs adopt a dissipative anchor-yield column base concept, they are less likely to experience residual story drift ratios during low probability of occurrence seismic events. It is also found that low-rise steel MRFs designed with nondissipative exposed column base connections are more prone to demolition than dissipative ones, due to their higher column residual axial shortening, particularly when ground motion duration is an important feature of the seismic hazard. Limitations of the present work are also discussed.
机译：本文探讨了通过锚杆屈服的耗散柱底座连接的概念。这一概念旨在提高低层钢力矩抵抗框架（MRF）的地震性能。提出了一种基于力学的模型，明确地模拟了在暴露的柱碱基中观察到的广泛损伤机制。该模型在帧有限元分析程序中实现，其滞后性能是用文献中提供的实验数据验证的。在标准非线性响应历史分析中结合了该建模功能，提供了钢铁MRF响应的新见解。结果表明，当低上层钢铁MRF采用耗散锚固柱基础概念时，它们在出现地震事件的低概率期间，它们不太可能体验残留的故事漂移比。还发现，由于其较高的柱残余轴向缩短，具有不良暴露的柱底座连接设计的低钢铁MRFS比耗散柱底座连接更容易被拆卸，特别是当地面运动持续时间是地震危险的重要特征时。还讨论了本作工作的局限性。

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