Abstract
A method that combined fracture mechanics and finite element was presented to quantify the variation of stress intensity factor to weld root flaw sizes in beam-to-column web connections with extended beam flange plates. Fracture toughness demands of web connections with extended beam flange plates were evaluated in terms of the mode I stress intensity factor. The stress intensity factor was calculated through a J-integral approach. The connection geometry was separately investigated in terms of the beam and column properties by finite element method. The influences of the length of beam and the length of column on the stress intensity factor were analyzed. The fracture toughness demands for the flaw on the top of the beam flange and for the bottom surface were studied, respectively. Finally, formulas for stress intensity factor were derived by orthogonal design and the results of finite element analysis. Results show that the likelihood of top flange fractures is smaller than that of bottom flange fracture. Stress intensity factor increases with the increase of beam parameters and reduces with the increase of column parameters.
| Original language | English |
|---|---|
| Pages (from-to) | 1108-1112 |
| Number of pages | 5 |
| Journal | Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) |
| Volume | 45 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2011 |
| Externally published | Yes |
Keywords
- Beam-to-column connections
- Finite element
- Fracture mechanics
- Orthogonal design
- Stress intensity factor
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