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Control of Base Metal Capacity of Welded Connections under Multiaxial Loading

Malek Ghaini, Niloofar | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48779 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Maleki, Shervin
  7. Abstract:
  8. Block shear failure in the parent material is considered as a common potential failure mode in welded connections used in steel structures. However, there is only little research reported on the block shear failure of welded connections under multiaxial loading. Multiaxial loading is defined as loading not parallel or perpendicular to weld lines and in the case of in planar eccentricity results in torsional loads. In this research a nonlinear finite element model is developed to study the effect of connection geometry, weld group configuration, and eccentricity of lap splice connection on block shear capacity. The case studied concerns a 3 milimeter thick structural steel plate (CSA G40.21 300W). The results are used to describe the behavior of block shear and to evaluate the performance of block shear design equations in presence of multiaxial loading. The predictions of the model is compared with the guidelines provided in AISC case examples and the differences are discussed. Finally, from this study a block shear equation is proposed that is expected to provide a better prediction of in block shear capacity in welded connections of steel structures under multiaxial loadings
  9. Keywords:
  10. Block Shear ; Steel Connection ; Base Metals Industry ; Welded Joint ; Multiaxial Loading ; Eccentric Loading ; Rotation Instantaneous Center

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