Fabricated repairing and reinforcing apparatus for reinforcing bearing force of beam in a bridge and construction method using the apparatus

摘要

PURPOSE: A prefabricated repair and reinforcement is provided to cut down the construction cost for a bridge by increasing the load capacity of a bridge beam by applying upward compressive strength on a bridge beam and to improve the compressive strength of a bridge beam effectively and economically by re-tensioning when the load capacity of a bridge beam is lowered. CONSTITUTION: The prefabricated repair and reinforcement system is installed on a bridge beam by the steps of connecting end brackets(40) installed on both ends of a bridge beam(10) and side brackets(30) installed on both sides of a bridge beam(10) using connecting bars(23), passing a side bracket connecting bar through a through hole of the side bracket(30) installed on both sides of the bridge beam(10) and a pulling hole of a bridge beam, then fixing on the side bracket(30) using nuts, connecting a steel bar or a strand(21) to a pair of side brackets(30) installed on both sides of the bridge beam(10) and unifying with a lower bracket(50) installed on the same spot as a spot where the side bracket(30) is installed on the lower part of the bridge beam(10) by welding, installing a prefabricated repair and reinforcement system(20) connected with a steel bar or a strand(21) on the lower brackets(50) installed on the lower part of the bridge beam(10), then filling up a space between the bridge beam(10) and the end bracket(40) and a space between the side bracket(30) and the lower bracket(50) with epoxy or epoxy mortar to be adhered closely, applying tensile force on the connecting bar(23) and the steel bar or the strand(21), then anchoring using an anchorage installed on the brackets(30,40,50) and applying compressive strength on the bridge beam(10).