| Title |
Study on the Development of Construction Method and Fire Resistant Performance for Steel Columns with Section Factors and Fire Boards |
| Keywords |
Fire Resistance ; Section Factor ; Fire board ; Steel Column |
| Abstract |
In domestic, the determination for thickness of fire protection materials of steel column has been conducted by using of one size of steel column, H-300x300x10x15, since the early 1990's with the critical temperature, 350℃ as a performance criterion. But there have been something problems when the thicknesses of fire protection materials that were chosen through fire tests for getting an approval from fire authorities was used to a real structural column. To make the new determination method of thickness for fire boards covered at steel columns, we utilized a new process including a section factor and the new criterion of performance of fire resistance for the small specimens in 1 meter covered fire boards that was chosen between a critical temperature from life-size loaded column in 3.5 meters and that being defined at KS F 2257-7 in 538℃. To demonstrate and make a new equation for determination of thickness of fire board, we carried out 4 times fire test with full-size specimens and 8 times with small-size specimen consisted of H-sections and square rectangular sections, respectively. After fire tests, we could derive a FR = 63.25 - 0.24Hp/A + 2.76 (R=0.99) for a gypsum board. |