基于内套筒连接的模块化钢框架梁柱节点力学性能研究

Mechanical Properties of Modular Steel Frame Beam-to-column Joint With Inner Sleeve Connection

文中提出了一种基于内套筒连接的模块化钢框架梁柱节点,并对其力学性能开展有限元分析。结果表明,节点具有良好的滞回性能,能形成可靠连接。当层间位移角小于1.5%时,刚度退化较慢,等效粘滞阻尼系数趋于0;层间位移角大于1.5%时,刚度退化较快,等效粘滞阻尼系数不断增大,节点耗能能力逐渐增大。

This paper proposes a modular steel frame beam-to-column joint with inner sleeve connection,and finite element model was designed to analyze its mechanical properties.The results showed that the joint has good hysteresis performance and reliable bearing capacity.When the story drift ratio is lower than 1.5%,the stiffness degradation is slow,and the equivalent viscous damping coefficient is closer to zero.As the story drift ratio is greater than 1.5%,the stffness degradation grows faster,the viscous damping coefficient and energy dissipation capacity continues to increase with the increasing with story drift ratio.