A connection element (12) of composite material includes a bundle of fibers (14) and a binding agent. The connection element (12) further includes an insertion portion (16) having two ends (18, 20). The insertion portion (16) includes a section of the bundle of fibers embedded in the binding agent to form a monolithic structure; at at least one of the ends (18, 20) a fixing portion (22, 24) is provided. The fixing portion (22, 24) includes fibers (14) overhanging from the insertion portion (16) and partially embedded in the monolithic structure. The fibers are predisposed with anchors (26, 28) adapted to form an anchorage between the fibers (14) of the fixing portion (22, 24) and a plaster and/or a reinforcement element.

The present disclosure relates to a device and a method for reinforcing a round section wood beam by the combination of a prestressed Fiber Reinforce Plastic (FRP) sheet and a high strength steel wire rope. The device includes an FRP sheet adhered to a bottom surface of a log beam in the length direction. A middle supporting piece is mounted in the middle of the log beam. An end part reinforcing anchoring piece is mounted at each of two ends of the log beam. FRP hoops are adhered to the log beam and are located between the middle supporting piece and each of the end part reinforcing anchoring pieces at intervals in the length direction. High strength steel wire ropes with both ends connected to the corresponding end part reinforcing anchoring pieces are respectively arranged on the two sides of the middle supporting piece.

A reinforcement system includes a structural member such as a concrete wall including a pair of holes formed therein. A fiber reinforcement strip is adhered to the structural member between the pair of holes. A U-shaped bracket includes a pair of legs being secured in the pair of holes and a bridge portion that overlaps an the fiber reinforcement strip, a secondary reinforcement strip can be used to distribute forces from the bridge portion of the bracket along a length of the fiber reinforcement strip.

A method of anchoring surface mounted strengthening systems to a structural member being repaired/strengthened or connecting the surface mounted strengthening systems to adjacent structural members to provide force-transfer or terminating a surface-mounted strengthening system includes drilling a hole in an existing structural member and inserting a portion of a fiber-reinforced anchor or connector into the hole in the existing structural member. The anchor or connector includes a bundle of fibers/rovings, and the portion includes rovings encapsulated in a pre-cured adhesive to form a reinforced portion having a desired cross-sectional size and shape to be received by the hole. The method further includes splaying free ends of the fibers/rovings at an end of the anchor and adhering the splayed ends of the fibers/rovings onto the surface-mounted strengthening system of the strengthened member or onto adjacent members with adhesive.

This method is suitable for the strengthening of concrete or timber structures (1, 4) by applying prestressed Carbon FRP or Glass FRP lamella (8). Firstly, at least one groove (22) is cut into the concrete or timber structure (1, 4) along the direction in which the concrete or timber structure (1, 4) is to be strengthened. The grooves (22) are filled with epoxy resin (9) and a layer of epoxy resin (9) is put onto the entire section to be equipped with the CRFP or GFRP lamella (8). The lamella (8) will be prestressed and anchored at both ends. U-shaped brackets (24) are then being put over the two end sections of the CFRP or GFRP lamella (8) by inserting and submerging its both U-legs (27) into holes (26) filled with resin as well. These holding brackets (24) will then tightly press onto the CFRP or GFRP lamella (8) to prevent cracking or fracture of the concrete or timber and bending away of the extremities of the CFRP or GFRP lamella.

A fiber reinforced polymer (FRP) anchor configured for field testing includes a precured end portion at a first end of the FRP anchor, a plurality of rovings extending from the precured end portion to free ends at a second end of the FRP anchor wherein the rovings being splayed in a first plane, and a pair of plates disposed at opposite sides of the rovings relative to the first plane. The plates are cured to the splayed rovings.

The present disclosure relates to a device and a method for reinforcing a round section wood beam by the combination of a prestressed Fiber Reinforce Plastic (FRP) sheet and a high strength steel wire rope. The device includes an FRP sheet adhered to a bottom surface of a log beam in the length direction. A middle supporting piece is mounted in the middle of the log beam. An end part reinforcing anchoring piece is mounted at each of two ends of the log beam. FRP hoops are adhered to the log beam and are located between the middle supporting piece and each of the end part reinforcing anchoring pieces at intervals in the length direction. High strength steel wire ropes with both ends connected to the corresponding end part reinforcing anchoring pieces are respectively arranged on the two sides of the middle supporting piece.

A fiber-reinforced polymer anchoring system for a structural element includes a fiber-reinforced polymer member configured to provide external tensile reinforcement to the structural element; an anchoring device coupled with the fiber-reinforced polymer member and the structural element; wherein the anchoring device includes a metallic layer, a fiber-reinforced polymer layer, and a fastener for securing the anchoring device on the fiber-reinforced polymer member and the structural element.

A pre-fabricated composite reinforcement device for installation on a structure, comprising a metal reinforcement layer; a fiber reinforced polymer layer; an adhesive layer configured between the metal and fiber reinforced polymer layer; and a plurality of power-actuated fasteners configured for securing the metal reinforcement, fiber reinforced polymer, and adhesive layer to the structure; and wherein a first side of the metal reinforcement layer is for positioning upon the structure for installation of the fasteners with the first side facing away from the structure, and a second side is configured with the adhesive and fiber reinforced layer across a surface area of the second side of the metal reinforcement layer.

A method is defined for attaching mounted parts on a mounting substrate formed of concrete or masonry, having a group of anchors wherein the following is true for the ratio VSd/NSd of the rated value for the transverse load VSd and of the rated value of the tensile load NSd of at least one anchor in the anchor group: VSd/NSd≥0.3, preferably VSd/NSd≥0.6 and particularly preferably VSd/NSd≥1.0, and wherein the characteristic resistances of these anchors to transverse loading VRk or to tensile loading NRk satisfy the following relationship: VRk/NRk≤1.1. The at least one anchor of the anchor group is inclined at an angle αAnker to the perpendicular to the surface of the mounting substrate in such a manner that the following is true: αAnker=k*¾*arc tan (VSd/NSd) for NSd>0, and αAnker=k*67.5° for NSd=0, where: 0.8≤k≤1.34, providing that αAnker≤75°.