COMPOSITE BEAMS FOR BRIDGE-DECKS AND FLOOR CONSTRUCTIONS

摘要

An improved composite beam consisting of a concrete slab and a steel beam whose top flange is cast into the concrete slab characterized by having the top flange profiled on both sides and thus transfers the shearing forces between the top flange (12) or (22) and the concrete slab (13) or (23) respectively. The composite beam is characterized by the fact that the top flange (12) on the welded beam (11) is manufactured between rollers with grooves in the finish rolling so that the flange plate (12) gets ridges (14) on both sides across the flange (12). The rolled steel beam (21) has one-side profiled steel plates (24) with the ridges (26) firmly attached to the top flange (22).