偏心钢支撑混凝土框架结构的节点加固研究

Joint Reinforcement of Eccentric Steel Bracing Concrete Frame Structures

采取偏心钢支撑与混凝土框架结构之间的可靠连接,充分发挥偏心钢支撑耗能优的特点,是实现钢支撑有效加固钢筋混凝土框架的关键所在。对钢支撑与混凝土框架连接采用了U型外包钢方式,利用ABAQUS有限元软件建立模型通过对实验试件加以验证,得出结构的极限承载力、耗能破坏模式、抗侧刚度和延性系数。同时还对U型外包钢长度、底板厚度等设计参数进行了进一步分析,得到了各自对结构性能的影响规律。

It is very critical to realize the effective strengthening of the reinforced concrete frames by using the reliable connections between the eccentric steel bracing and reinforced concrete frame and giving a full play of the superior energy-dissipation behavior of the eccentric steel bracing.The U-Section Steel-Encased design was used in the connection of the eccentric steel bracing and reinforced concrete frame,the EF software in the ABAQUS was adopted to built the model and the experimental parts were examined,the paper obtained the fol-lowing： the ultimate carrying capacity of the structure,the energy dissipation failure mode,the lateral stiffness and ductility factor.Then the paper gave a further analysis on the relevant design parameter such as the length and thickness of the bottom plate in U-Section Steel-Encased connections,the corresponding influence behaviors were obtained.