Behavior of iTECH Composite Beam in Fire - Experimental Study

Abstract

This paper presents the resul ts o f an experimental investigation into the fire performances of simply supported iTECH composite beams using an ISO834 standard fire. To evaluate the fire resistance performance of 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 section size and decreasing its load ratio. Coating 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. Before reviewing the fire test, I will present the basic concepts of the iTECH composite beam. Then, I will present the fire-resistance test overview and test results. The name of this composite beam is " iTECH", which means " Innovat ive" , "Technical", "Economical", "Convenient" and "Hybrid System". This composite beam was developed mainly for the purpose of reducing the story height of high-rise residential steel buildings. This figure compares the "conventional composite beam" and the "iTECH composite beam". By adopting this floor system, a story height reduction of about 200 mm can be obtained. The advantages of a reduced story height are : First, increased number of stories and more lease area, second, reduced exterior and interior wall space, and third, reduced air conditioning and heating space. Figure 1.2.1