Figure 1. Comparison of mechanical properties of test results with codes
Figure 2. Comparison of mechanical properties of high strength steels after fire exposure.
Figure 3. Typical creep strain-time curves of Q460 steel at various stress.
Figure 4. Typical creep strain-time curves of Q690 steel at various stress.
Figure 5. Specimens and dimensions.
Figure 6. Reduction factor of residual stress after fire exposure.
Figure 7. Comparison of stability coefficient and critical temperature.
Figure 8. Axial displacements of test specimens.
Figure 9. Failure modes in test specimens.
Figure 10. Dimensions of original and equivalent cross sections of the steel beam.
Figure 11. Finite element model of steel beam.
Figure 12. Axial displacement-load curves of Q460 steel columns.
Figure 13. Buckling first occurs at flange.
Figure 14. Buckling first occurs at web.
Figure 15. Photos of specimens.
Figure 16. Temperature history of the specimens.
Figure 17. Load-deflection curves.
Figure 18. Load-axial displacement curves.
Table 1. Coefficients of a, b and c in Fields and Fields creep model for Q460 steel
Table 2. Parameters of the specimens
Table 3. Comparison of critical temperature of high strength steel beams
References
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