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首页> 外文期刊>Journal of structural engineering >Seismic Behavior and Design of Concrete-Filled Thin-Walled Steel Tube Column-to-Foundation Connections
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Seismic Behavior and Design of Concrete-Filled Thin-Walled Steel Tube Column-to-Foundation Connections

机译：混凝土薄壁钢管柱基础连接的地震行为与设计

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Thin-walled steel tubes are highly recommended to be used in concrete-filled steel tube (CFST) columns due to their economic benefits. However, the inherent difficulty of connections between the steel tube and foundation limits the application of thin-walled CFSTs. Four types of CFST column-to-foundation connections employing anchor bars to resist the bending moment are proposed, avoiding the insertion of the steel tube into the foundation. In this paper, the design method for the proposed column-to-foundation connections was first studied. Eight column-to-foundation connections for thin-walled CFST columns were tested under combined constant axial load and cyclic lateral load. The observed failure modes, load-displacement hysteresis curves, load-displacement skeleton curves, circumferential stiffness, energy-dissipation coefficient, and load-strain curves of steel tube were analyzed and presented. The experimental results and theoretical analyses indicated that properly designed connections possessed higher bending strength and better ductility than traditional embedded connections. (C) 2021 American Society of Civil Engineers.
机译：薄壁钢管是高度推荐在钢管混凝土管（钢管）的列中使用，因为它们的经济效益。然而，钢管和基础之间的连接的固有的困难限制了薄壁CFSTs的应用。四种类型的采用锚杆抵抗弯矩钢管混凝土柱与地基连接被提出，避免了钢管的插入基础。本文所提出的柱与基础连接的设计方法，首次研究。八薄壁钢管混凝土柱与地基连接，合并恒定的轴向负荷和循环横向载荷下进行测试。所观察到的失效模式，载荷 - 位移滞后曲线，载荷 - 位移骨架曲线，周向刚度，能量耗散系数，和钢管的负载 - 应变曲线进行了分析和呈现。实验结果和理论分析表明，适当设计的连接具有更高的弯曲比传统嵌入连接强度和更好的延展性。 （c）2021年美国土木工程师协会。

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