钢结构梁柱节点抗震韧性提升策略综述

Review on Seismic Toughness Improvement Strategies for Steel Structure Beam-Column Joints

摘要: 为提升钢结构梁柱节点的综合抗震性能，本文综述了渐变式削弱与加劲肋协同作用的研究。目的在于阐明其协同增效机理，梳理设计现状。方法上，通过系统分析文献，从塑性铰引导、应力重分布等方面剖析机理，并对现有协同方案进行分类与性能比较。结果表明，协同设计能精准引导并扩大塑性铰区，优化应力流，抑制局部屈曲，从而全面提升节点的延性、耗能与损伤可控性；削弱参数与加劲肋刚度、位置的匹配是影响性能的关键。然而，该领域仍缺乏统一设计理论与规范，在超低周疲劳和震后可修复性方面的研究不足。结论认为，二者协同是提升节点韧性的有效途径。未来需发展精细化设计理论、建立涵盖可修复性的评估体系，并推动相关设计纳入工程规范。

Abstract: To enhance the comprehensive seismic performance of steel structure beam-column joints, this study reviews research on the synergistic effects of gradient weakening and stiffener reinforcement. The objective is to elucidate their cooperative mechanism and summarize current design practices. Methodologically, systematic literature analysis was conducted to examine mechanisms through plastic hinge guidance and stress redistribution, followed by classification and performance comparison of existing synergistic schemes. Results demonstrate that collaborative design can precisely guide and expand plastic hinge zones, optimize stress flow distribution, and suppress local buckling, thereby comprehensively improving joint ductility, energy dissipation capacity, and damage controllability. The alignment of weakening parameters with stiffener stiffness and positioning proves critical for performance optimization. However, the field still lacks unified design theories and specifications, with insufficient research on ultra-low cycle fatigue and post-earthquake repairability. The study concludes that synergistic interaction between these approaches effectively enhances joint toughness. Future efforts should focus on developing refined design theories, establishing repairability assessment frameworks, and promoting integration of such designs into engineering standards.