Abstract
A unified structural analysis method is developed in order to take into account the effects of the histories of corrosion loss of material and repair on their long-term mechanical performance of steel structures in addition to the histories of the damages caused by excessive external loads such as, big seismic loads. This analysis method discussed in this chapter, is characterized by the point that the volume change in material due to corrosion or repair is adopted as a new controlling parameter along with the conventional parameters such as load and displacement. With this new parameter, the residual stress and residual deformations of structures that are determined by the histories of corrosion loss of material, past repair, and seismic damage can be accurately predicted at an arbitrary point of their lifetime. As a result, the long-term mechanical performance of steel structures can be accurately assessed. This analysis method is characterized by the point that the volume change of material due to corrosion or repair is adopted as a new controlling parameter in addition to the conventional parameters such as load and displacement.
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