Ultimate capacity of multi-planar double X-joints
- Nanyang Technological Univ. (Singapore)
The ultimate capacity of the axially loaded multi-planar double X-joints have been evaluated using the finite element method. A comprehensive study has been done on different combinations of axial loading applied to 20 multi-planar double X-joints. For all the joints analyzed, the in-plane braces were subjected to compressive loadings but the load acting on the out-of-plane braces were varied between compressive load, tensile load and no load. The ultimate capacities of the multi-planar joints, with various braces to chord diameter ratio ({beta}) and radius of chord to thickness ratio ({gamma}), are compared to those of the corresponding uniplanar joints. The variation of the ratio between the strength of the multi-planar joint and that of the corresponding uniplanar joint (thereafter called strength ratio) is found to be significant. The strength ratios derived from the AWS code are also compared to those obtained from the numerical analysis by the present authors, and the AWS code is found to be less accurate in predicting multi-planar effects for certain load cases. Moreover, significant discrepancies are found between the ultimate capacities of the multi-planar double X-joints obtained by the present authors and those predicted by the API code.
- OSTI ID:
- 264131
- Report Number(s):
- CONF-950604--; ISBN 1-880653-20-6
- Country of Publication:
- United States
- Language:
- English
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