Fire Resistance of Steel Columns with Partial Loss of Fire Protection

摘要

Partial damage or loss of fire protection of structural steel members may occur due to impact, accidental damage, improper application or removal in the area of connections and installations. Locally missing fire protection distinctly decreases the fire resistance of protected structural steel members. In a parametric study the reduction in fire resistance for steel columns is calculated in function of the size and location of the missing protection using a finite element approach including buckling. As a result of this parametric study, it becomes obvious that the consequences resulting from local loss of fire protection are most important for steel columns with thick coatings and long fire resistance times. It is therefore important to avoid damaged areas by using robust fire protections systems or to perform periodical repairs.