摘要
提出一种适用于H形柱的箱形节点域的H形梁翼缘非对称双肋板与扩翼板加强式的弱轴连接。应用ABAQUS软件,对标准节点、梁翼缘对称双肋板加强式节点、梁翼缘非对称双肋板与扩翼板加强式节点和梁翼缘扩翼板加强式节点共4个足尺的计算模型进行力学性能对比,分析研究了节点的破坏特点、滞回性能、骨架曲线、耗能特性、塑性转动能力和延性等问题。研究结果表明,H形梁翼缘非对称双肋板与扩翼板加强式的弱轴连接能够有效地在梁端形成"塑性铰",并且"塑性铰"远离节点核心区,从而实现"强柱弱梁"和"强节点弱构件"的抗震理念。梁翼缘非对称双肋板加强式节点可以达到与梁翼缘对称双肋板加强式节点相似的抗震性能,并且改善了梁柱翼缘对接焊缝的应力。梁翼缘非对称双肋板与扩翼板加强式节点的耗能能力和延性系数较扩翼板加强型节点显著提高,塑性转动能力能达到美国FEMA-267建议的0.03 rad,符合国际上对节点塑性转动能力的要求。
The asymmetric double rib and extending wing plate reinforced H-beam flange connection with box-shaped joint was presented for weak axis of H-section column. Using the ABAQUS finite element software to analyze the mechanical properties of four full-scale calculation models,which were standard joint,asymmetric double rib and extending wing plate reinforced joint and extending wing plate reinforced joint of beam flange joints. The failure mode,hysteresis behavior of joints,stiffness degradation,ductility coefficient and energy dissipation capacity were analyzed. The results showed that the joint could effectively force the plastic hinge at beam-end to relocate far away from the core area of the joint,so as to realize the strong column weak beam principle,and achieve the same seismic behavior of joint reinforced with ribbed plate and improve the stress of beam and column flange butt welding. Asymmetric double beam flange rib and the expansion of wing plate reinforced joint energy dissipation capacity and ductility coefficient of flange plate reinforced joints increased significantly,the plastic rotation capacity could reach 0. 03 rad proposed by FEMA-267,which could accord with the requirements of the plastic rotation capacity of the joint.
作者
林建军
宋文龙
Lin Jianjun Song Wenlong(School of Civil Engineering, Chang＇ an University, Xi＇ an 710061, China)
出处
《钢结构》
北大核心
2017年第6期24-30,93,共8页
Steel Construction
关键词
节点域箱形加强式
弱轴连接
骨架曲线
抗震性能
box-strengthen joint region
minor-axis connection
skeleton curve
seismic behavior
