混凝土框架节点滞回性能研究

Research on hysteretic performance of conctete frame joints

在研究混凝土框架节点受力特点的基础上,阐述宏观力学模型的受力机理,利用弹塑性有限元软件OpenSEES中已有的梁柱节点单元和梁柱纵筋黏结滑移模型,对国内外研究者已经完成的低周往复荷载作用下的混凝土框架中节点的滞回曲线进行计算分析,建立基于OpenSEES软件的混凝土框架节点和预应力混凝土框架节点的计算模型,分析影响框架节点滞回性能的主要影响因素,得到了有意义的结论,为混凝土框架节点的设计计算提供一条简便途径。

On the basic of sdudying the mechanical characteristics of concrete frame joints, the working mechanism of macroscopic mechanical model was expounded. Utilizing the beam-column joint element and bond-slip model of elastic-plastic finite element software OpenSEES, the hysteresis curve of some concrete frame interior joints under low cycle loading was analyzed, and the calculation model for concrete frame joints and prestressed concrete frame joints was established. The main factors influencing the hysteretic behaviors of frame joints were analyzed and some meaningful conclusions were obtained, which can provide a convenient way for the design and calculation of concrete frame joints.