Study on ultimate bearing capacity of XK-type intersecting joints and the influence of spatial effect on ultimate bearing capacity
To explore the ultimate bearing capacity of XK-type intersecting nodes and the effect of load effect on the ultimate bearing capacity, a finite element analysis is conducted on 7 XK-type nodes by VUSDFLD subroutine with embedded SWDM model. The influence of the ratio nxk of strut axial force to web axial force on the ultimate bearing capacity of XK-type nodes, and the change of ultimate load carrying capacity of space XK-type nodes compared with that of plane K-type nodes with the same parameters are studied to analyze the influence of load effect and geometric effect on the ultimate bearing capacity of the XK-type node, and to analyze the effect of the ratio of the outer diameter of strut to that of chord βx, the ratio of chord diameter to wall thickness γ, and the web gap a on the ultimate bearing capacity of the nodes of XK-type nodes. The results show that: the ultimate bearing capacity of the XK-type node increases with the increase of βx, decreases with the increase of γ, and increases with the increase of the web gap a. With the increase of nxk, the ultimate bearing capacity of the node decreases no matter the XK-type node stanchion is subjected to pressure or tension, and nxk has little effect on the node's ultimate bearing capacity when the XK-type node stanchion diameter and chordal bar wall thickness are larger, and the ultimate load carrying capacity of space XK-type nodes increases compared with that of plane K-type nodes with the same parameters.
万方数据
维普
