Figure 1. General view of the test set-up.
Figure 2. Details of the end supports: (a), (b) and (c) pin-ended; (d) semi-rigid ended.
Figure 3. Scheme of the cross-sections of the tested columns.
Figure 4. Temperatures at column’s mid-height a) CC194-lka-sr, b) EC320-lka-sr, c) RC250-lka-sr and d) SC150-lka-sr.
Figure 9. Lateral deflections for columns CC194-lka: a) pp-y axis; b) pp-x axis; c) sr-y axis; d) sr-x axis.
Figure 10. Lateral deflections for column EC320-lka: a) pp-y axis; b) pp-x axis; c) sr-y axis; d) sr-x axis.
Figure 11. Lateral deflections for column RC250-lka: a) pp-y axis; b) pp-x axis; c) sr-y axis; d) sr-x axis.
Figure 12. Lateral deflections for column SC150-lka: a) pp-y axis; b) pp-x axis; c) sr-y axis; d) sr-x axis.
Figure 13. Stiffness of column CC194-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 14. Stiffness of column EC320-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 15. Stiffness of column RC250-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 16. Stiffness of column SC150-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 17. Rotations on top of column CC194-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 18. Rotations on top of column EC320-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 19. Rotations on top of column RC250-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 20. Rotations on top of column SC150-lka for a) pin-ended and b) semi-rigid boundary conditions.
Figure 21. Columns after fire test a) CC194-lka-pp; b) EC320-lka-pp; c) RC250-lka-pp; d) SC150-lka-pp.
Figure 22. Columns after fire test a) CC194-lka-sr; b) EC320-lka-sr; c) RC250-lka-sr; d) SC150-lka-sr.
Figure 23. Deformed shapes of rectangular and square columns showing local buckling of steel profile.
Figure 5. a) Relative Axial Restraint Force and b) Axial Displacements for column CC194-lka, for semi-rigid and pinended boundary conditions.
Figure 6. a) Relative Axial Restraining Forces and b) Axial Displacements for column EC320-lka for semi-rigid and pinended boundary conditions.
Figure 7. a) Relative Axial Restraining Forces and b) Axial Displacements for column RC250-lka for semi-rigid and pinended boundary.
Figure 8. a) Relative Axial Restraining Forces and b) Axial Displacements for column SC150-lka for cases of semi-rigid and pin-ended boundary.
Table 1. Test programme
Table 2. Geometric characteristics of specimens
Table 3. Maximum relative axial restraining forces, time for the maximum axial restraining forces and critical times
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