초록
본 연구에서는 iTECH 합성보 실험체에 대한 온도와 변형에 대한 내화성능을 ISO834 표준화재와 BS476-20 및 KSF2257 기준에 근거하여 평가하였다. 국내외적으로 복합구조의 내화성능을 규명하기 위한 연구는 지극히 미흡한 실정이며, 따라서 본 연구에서는 iTECH 합성보의 내화성능을 평가하기 위해 1.5m의 슬래브를 포함한 4..7m의 스팬길이에 대하여 실험을 수행하였다. 변수는 실험체의 단면크기, 피복재 보강방법과 보강두께, 그리고 하중비로 하여 내화실험을 수행하였다.
Thispaper presents the results of an experimental investigation into the fire performances ofsimply supported iTECH composite beams using an ISO834 standard fire. There are very few independent studies on the fire resistance of composite steel and concrete structures of various designs. The iTECH composite beam system has been used in construction, but nothing is known about its influence in a fire. To evaluate the fire resistance performanceof the iTECH beam, a test was conducted for 4.7m-span-length iTECH beams under given conditions in a laboratory. The fire resistance performance of unprotected coatings of the iTECH beam has been examined, and a longer period of fire resistance was achieved by increasing the beam coating's section size and decreasing its load ratio. Coatings for the fire protection of iTECH beams reduce the rate of temperature rise of the beam in case of fire, and the required thickness of spray-on fire protection coatings can be determined by means of tests.