钢管混凝土柱—钢骨梁节点非线性分析

Nonlinear element analysis on the behavior of joints between concrete-filled steel tubular columns with steel reinforced beam

钢管混凝土柱在地震区不受轴压比限制,因此,近年来在高层建筑中应用较多。但节点构造较为复杂,施工难度大,采用梁中钢骨穿插柱的办法可以使得施工简单易行,但力学性能还有待进一步研究。通过对两种钢骨穿插节点的有限元分析,结果表明:这两种连接节点抗震性能优越,延性非常好;节点刚度退化不多;破坏时节点域和柱变形极小。此两种节点整体性很强、刚度大,破坏时塑性角外移,避免节点域的脆性破坏,符合强节点、弱杆件的抗震设计原则。

The concrete-filled steel tubular has the behavior of avoiding the limit of axial compression ratio,so has been widely used in high-rising structures recently. The structure of the connections are very complex and it is difficult to construct. The new connections of beam-column constret easily, but mechanical behavior are need further study on. The joints were analysised by finite element. The result reveals that the two connections＇ seismic behavior are perfect, good ductility;The deformation of the column and the region of the connection is much smaller when they were broken. Indicating the connections＇s globality is better and the stiffness is bigger. It avoids brittleness for breaking styles when they are given more burden. The connections satisfy the request of code for seismic design of buildings for strong connections and feebleness member bar.