HYBRID COMPOSITE BEAM HAVING FIRE-RESISTANT COATING MATERIAL AND CONSTRUCTION METHOD THEREOF

摘要

The present invention relates to a steel composite beam having a cross section capable of effectively resisting stress by being intensively arranged in an outer cover of a structural member and filled with concrete inside. More specifically, the present invention relates to a composite beam and a construction method thereof, which ensures stable movement as the cross section of an end portion is closed and is constructed to withstand fire as an exposed surface is coated with a fire-resistant material. The present invention comprises: a pair of upper members including an upper plate, a side plate extended vertically downward from one end of the upper plate, and a lower plate extended in parallel with the upper plate to the opposite direction from a lower end of the side plate; a lower member including a lower horizontal plate, a vertical plate extended vertically upward from both ends of the lower horizontal plate respectively, and an upper horizontal plate extended inwardly from an upper end of the vertical plate in parallel with the lower horizontal plate and bolted to the lower plate of the upper members; and a steel beam having a first angle member reducing the number of required bolts by widening a gap between the bolts combining the upper member and the lower member.