Abstract
As we know, steels have excellent mechanical properties at ambient temperature. However, the buildings made of steel can be inevitably exposed to fire hazards. Deterioration of mechanical properties and creep deformation is considered the most important factor affecting the behavior of steel structures in fires. Much research has been carried out on fire resistance of mild steel structures and design specifications have been published. There are no design guidelines in current fire design codes for assessing fire exposed high-strength steel structures. In recent 10 years, the authors of this book have carried out a lot of fundamental research on fire behavior of high-strength steels and structures. The topics include fire response and post fire behavior of restrained high-strength steel columns, creep buckling of high-strength steel columns. In this chapter, the main findings of these researches were summarized and presented.
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