钢管混凝土框架外伸端板连接节点的抗震性能研究.docVIP

 钢管混凝土框架外伸端板连接节点的抗震 性能研究# 王静峰，张琳* 5 10 （合肥工业大学土木与水利工程学院，合肥 230009） 摘要：为了获悉钢管混凝土框架外伸端板连接节点在地震作用下的力学性能，进行了 4 个钢 管混凝土柱与钢梁外伸端板连接节点试件的低周反复加载试验，研究了端板厚度和柱截面类 型对节点破坏形态和抗震性能的影响。详细观察了此类新型组合节点的受力全过程，分析了 荷载-位移关系滞回曲线和骨架曲线、强度和刚度退化规律等抗震性能指标。同时，利用 ABAQUS 有限元软件进行了节点的非线性受力全过程分析，并用试验结果验证了有限元计 算模型的准确性。研究表明，钢管混凝土框架外伸端板连接节点具有优越的抗震性能、可靠 安全的连接性能和良好的耗能能力，可以应用于多高层组合框架中 关键词：钢管混凝土；外伸端板；半刚性；节点；滞回性能 中图分类号：中图分类号: TU398.1 文献标志码：A 15 Seismic behavior of extended end plate joints to concrete filled steel tubular columns in semi-rigid composite frames Wang Jing-feng, Zhang Lin (School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China) 20 Abstract: In order to investigate the seismic behavior of the extended end plate joints to concrete filled steel tubular (CFST) columns with blind bolts, an experimental study on four specimens of the typed joints subjected to cyclic loading has been done. The influence of the thickness of end plate and the type of steel tube cross-section on the failure modes and seismic behavior was studied. In this paper, the loading procedure of the novel typed composite joints was carefully 25 30 35 40 observed. The force-displacement hysteretic curves and regulation of the degradation of strength and stiffness were analyzed and evaluated. Moreover, the nonlinear analysis of the typed joints was carried out by ABAQUS software. Compared with the tested results, the calculating results agree well with them. It was concluded that the end plate joints to CFST columns with blind bolts showed excellent seismic performance, reliable and safety connecting performance, good energy dissipation capacity. It can be used in multilayer and high-rise composite frames. Key words: concrete filled steel tubular; extended end plate; semi-rigid; joints; hysteretic behavior 0 引言 钢管混凝土结构具有优越的抗震性能、较高的承载力、施工快捷和良好的耐火性能等优 [1] 式、穿筋式、外加强环式、内隔板式、贯通隔板式等节点，并进行了大量试验研究和理论分 析[2]。然而，钢管混凝土柱节点在实际工程应用中仍存在许多加工、设计和施工方面的问题。 本文提出了一种新型的半刚性钢管混凝土框架节点，即钢管混凝土柱与钢梁单边螺栓外 伸端板连接节点。该新型节点使用特殊