METHOD OF REINFORCING PILLAR BY USING FRP SHEET AND CEMENT BOARD SEGMENTED IN LONGITUDINAL DIRECTION

摘要

The present invention relates to a method of reinforcing a pillar by using an FRP sheet and a cement board segmented in a longitudinal direction, capable of enhancing proof stress by attaching an FRP sheet to the surface of a concrete filled tube (CFT) pillar or concrete pillar, and improving a vulnerable quality of an adhesive or the like to a fire by attaching a plurality of cement boards segmented as unit members in a longitudinal direction to each side of a pillar consecutively in a transverse direction while preventing the cement boards from being damaged or separated by enabling the cement boards segmented in a longitudinal direction to be moved together with the pillar when an external impact such as an earthquake or the like occurs. According to an embodiment of the present invention, the method includes the following steps of: (a) removing a foreign substance from the surface of a pillar, and installing a board coupling member, comprising an attachment plate and coupling bolts formed at regular intervals in a transverse direction to protrude to the outer surface of the attachment plate, in the upper and lower parts of each side of the pillar in a longitudinal direction; (b) applying epoxy to the surface of the pillar, and then, wrapping the pillar with an FRP sheet; (c) applying mortar to the surface of the FRP sheet by a predetermined thickness; (d) attaching a corner reinforcement member having an L-shaped cross section to each corner of the pillar; and (e) attaching a cement board, having the same length as the length of the pillar and segmented in a longitudinal direction where each coupling hole is bored at both longitudinal ends, to the surface of the pillar in a section between corner reinforcement members consecutively in a transverse direction of each side of the pillar by inserting a coupling hole into a coupling bolt of a board coupling member and coupling the coupling hole with a nut.;COPYRIGHT KIPO 2020