A comprehensive study has been carried out on the seismic behavior of straight‐tenon joints (STJs) reinforced with the state‐to‐art friction damper. Quasi‐static cyclic tests were conducted on three reinforced test specimens and one contrast joint, and friction coefficients were selected as the variables. The failure modes and the cyclic behaviors of both STJs and fiction plates were obtained. Numerical simulation was conducted to investigate the plastic deformation and stress distribution of the STJs, and a parametric study on the friction coefficient was also performed. Results show that the main failure modes of the reinforced STJs include the pressing dents on the column, the tenon extraction, and the surface of friction plate being smoothed. Increasing the friction coefficients of the friction plates helps to reduce the extraction of the tenon and promote the stiffness, bending moment, and energy dissipation capacities of the reinforced STJs. Furthermore, 0.4 is considered as the optimal friction coefficient in terms of the cyclic behavior and energy dissipation of reinforced STJs. Additionally, the composition of energy dissipation of friction plates first decreases and then slightly increases as far as the rotation increases. Numerical simulation agrees well with the experimental results, and the parametric study shows that for the reinforced STJ with a higher friction coefficient, higher yielding moments and ultimate moments can be obtained, but the friction coefficients have little effect on the ductility.

中文翻译：

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摩擦阻尼器加固直筋节点抗震性能的试验与数值分析

对采用最新型摩擦阻尼器加固的直筋接头（STJ）的抗震性能进行了全面研究。对三个增强的试样和一个对比缝进行了准静态循环测试，并选择了摩擦系数作为变量。获得了STJ和小说板的失效模式和循环行为。进行了数值模拟以研究STJ的塑性变形和应力分布，并对摩擦系数进行了参数研究。结果表明，增强型STJ的主要破坏方式包括柱上的压痕，榫的拔出和摩擦板表面的光滑化。增大摩擦板的摩擦系数有助于减少榫头的拔出，并增强增强型STJ的刚度，弯矩和能量耗散能力。此外，就增强的STJ的循环行为和能量耗散而言，0.4被认为是最佳摩擦系数。另外，随着旋转的增加，摩擦片的能量耗散的组成首先减小，然后稍微增加。数值模拟与实验结果吻合良好，参数研究表明，对于摩擦系数较高的增强型STJ，可以获得较高的屈服力矩和极限力矩，但摩擦系数对延性的影响很小。增强STJ的能量消耗能力。此外，就增强的STJ的循环行为和能量耗散而言，0.4被认为是最佳摩擦系数。另外，随着旋转的增加，摩擦片的能量耗散的组成首先减小，然后稍微增加。数值模拟与实验结果吻合良好，参数研究表明，对于摩擦系数较高的增强型STJ，可以获得较高的屈服力矩和极限力矩，但摩擦系数对延性的影响很小。增强STJ的能量消耗能力。此外，就增强的STJ的循环行为和能量耗散而言，0.4被认为是最佳摩擦系数。另外，随着旋转的增加，摩擦片的能量耗散的组成首先减小，然后稍微增加。数值模拟与实验结果吻合良好，参数研究表明，对于摩擦系数较高的增强型STJ，可以获得较高的屈服力矩和极限力矩，但摩擦系数对延性的影响很小。随着旋转的增加，摩擦片的能量耗散成分首先减小，然后略有增加。数值模拟与实验结果吻合良好，参数研究表明，对于摩擦系数较高的增强型STJ，可以获得较高的屈服力矩和极限力矩，但摩擦系数对延性的影响很小。随着旋转的增加，摩擦片的能量耗散成分首先减小，然后略有增加。数值模拟与实验结果吻合良好，参数研究表明，对于摩擦系数较高的增强型STJ，可以获得较高的屈服力矩和极限力矩，但摩擦系数对延性的影响很小。