方圆相贯内隔板加劲T型和K型节点破坏模式和极限承载力的研究

Research on Failure Mode and Ultimate Strength of CR T-Joints and K-Joints with Inner Diaphragm

根据箱型柱内隔板加劲的原理,提出了方、圆相贯T型和K型节点内隔板加劲的措施.通过T型节点的对比试验,证明了内隔板加劲节点仍表现为主管表面塑性破坏的模式,节点的极限承载力较非加劲节点提高明显,同时也表现出良好的延性.在试验分析的基础上,通过数值分析探讨了T型、K型节点内隔板加劲板的位置、数量、加劲板的宽度和厚度对节点破坏模式和节点极限承载力的影响,提出了内隔板加劲板的构造要求和节点极限承载力取值等设计参数,避免了盲目加大加劲板尺寸对节点破坏模式的影响,具有重要的理论意义和工程意义.

According to the principle of box column inner diaphragm,the tubular of T-joints and K-joins（Square Chords and Circular Brace） with inner diaphragm are proposed.It is proved that the joints still show plastic failure on the square chords with inner diaphragm,the ultimate strength of the joints improve significantly than the joints without stiffening,and the joints show good ductility,through the contrast test of T-joints.The effects of distribution,quantity,width and thickness of inner diaphragm on failure mode and ultimate bearing capacity are discussed with numerical analysis,and some design parameters are proposed to avoid the improper size of stiffening.