BUTT JOINT OF MONOLITHIC REINFORCED CONCRETE SLAB AND STEEL GIRDER OF STEEL-REINFORCED CONCRETE BRIDGE SPAN STRUCTURE Russian patent published in 1998 - IPC

FIELD: construction engineering. SUBSTANCE: this relates to bridge-building industry and can be used for joining together monolithic reinforced concrete slab and metal structure. Butt joint of slab and steel girder has stops welded to girder and embedded in slab body. Stops are made in the form of continuous steel strips having slots. Located in aforesaid slots are reinforcement bars. Slots are elongated and create comb which is inclined in direction of acting major stresses in slab concrete at angle equal to 10-60 deg. to vertical plane. Reinforcement bars seated in slots create together lower working reinforcing net of reinforced concrete slab. In this case, diameter d of reinforcement bars, pitch f and width b of slot, distance h from slot edge to lower edge of strip, and thickness of strip are determined according to following relation: b = (1.1-1.6)d; f = (5-10)b; h = (1-3)t. Aforesaid embodiment of comb with inclined slots for anchoring reinforcing members located close to center of gravity of slab ensures taking not only shearing forces but breaking forces as well and what is particularly important it occurs uniformly over entire length. EFFECT: higher efficiency. 2 dwg