For the same simulated degree of corrosion, the steel bar with a symmetrically distributed residual cross-section showed the best ductility.
The results showed that the residual cross-section shape and the amount of cross-section loss had considerable influence on the ductility of the bars.
The load-bearing capacities of the corroded beams were assessed using the measured mechanical properties and the residual cross-section of the bars according to different failure mechanisms.
Three types of corrosion simulation with different residual cross-section shapes, including both uniform and non-uniform cross-section loss, were applied to non-corroded bars to investigate the influence of residual cross-section shape on the ultimate strain of the steel bars.
The fire design of timber structures usually take into account both the loss in cross-section due to charring of wood and the temperature-dependent reduction of strength and stiffness of the uncharred residual cross-section.
Through the tests, besides the corrosion degree, which was the most often used parameter to assess the corrosion, the corrosion morphology (i.e. represented by the radius of gyration of the residual cross-section) was found to be a very important factor influencing the ductility of the steel reinforcement and three typical corrosion morphologies were identified.
After the fire exposed timber layer is completely charred and the char-layer has fallen off, the thin vertical timber members are exposed to fire on 3 sides, leading to very irregular residual cross-sections with charring depths much greater than for heavy timber structures.
The increase in fatigue life is explained by residual stresses evolution within the specimen cross section during the fatigue test, leading to a build up of compressive residual stresses beneath its surface.
The facies were identified based on regional facies distribution, well log characteristics, lithologic association, and well correlation; d West-to-east cross section showing the residual pressure (difference between formation pressure and hydrostatic pressure) distribution and permeability of the Chang7 source rock interval (Section location in a) (After Yao et al. 2013).
For the FE analysis, the experimental steel weight loss data was used for modeling the residual steel cross-sections, reduced concrete strength, and deteriorated bond interface.
