摘要
为了研究钢框架梁柱节点通过梁翼缘焊接盖板加固后的受力性能,为新编国标《钢结构加固设计规范》提供依据,建立4个梁柱节点模型,采用循环加载方式,利用ABAQUS有限元软件研究节点在不同初始负载等级下的抗震性能,重点分析节点的破坏形式、极限承载力、滞回特性、延性和耗能能力、刚度退化现象,并与加固前对比。结果发现:盖板法加固钢框架梁柱节点能够有效地提高节点的极限承载力和延性,并成功地将梁端塑性铰外移至距盖板末端约1/4梁高位置处,避免了梁柱节点焊缝位置处的破坏,实现了盖板法加固钢框架梁柱节点的效果。
In order to study the seismic performance of the beam-to-column connections reinforced with cover-plate in steel frames and provide a reference for the new technical specification for strengthening steel structures,the FEM analysis under cycling loading for four beam-to-column connections with different initial loading was carried out to study the failure modes,limited resistance,hysteretic behavior,ductility, energy dissipation capacity,stiffness degradation of the connections,which were compared with unreinforced connections.The result showed that the reinforcement could effectively improve the limited resistance and ductility of the connections,which made plastic hinge shifts away a quarter of the beam height from the cover-plate end,thus avoiding the damage at the weld location and achieving the purpose of the reinforcement.
出处
《工业建筑》
CSCD
北大核心
2017年第2期23-27,93,共6页
Industrial Construction
基金
《钢结构加固设计规范》国家标准管理组科研专项课题(2013-02)
关键词
梁柱节点
滞回性能
塑性铰
抗震性能
加固
beam-to-column connections
hysteretic behavior
plastic hinge
seismic performance
strengthening
