DEVICE AND METHOD FOR REINFORCING STRUCTURES WITH PRE-STRESSED FIBRE-REINFORCED-POLYMER LAMINATES

DEVICE AND METHOD FOR REINFORCING STRUCTURES WITH PRE-STRESSED FIBRE-REINFORCED-POLYMER LAMINATES

This invention discloses a pre-stressing system for retrofitting of reinforced concrete members with externally bonded fibre-reinforced-polymer (FRP) laminates in bending. An FRP pre-stressing system includes a clamping unit (1), a light frame for hydraulic jack (2) and anchoring plates (3). The nov...

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Hauptverfasser: Slaitas, Justas, Valivonis, Juozas
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BUILDING
BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE
BUILDING MATERIALS
FIXED CONSTRUCTIONS
FORMS
HANDLING BUILDING MATERIALS ON THE SITE
REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS
SCAFFOLDING
SHUTTERING
STRUCTURAL ELEMENTS
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creator Slaitas, Justas
Valivonis, Juozas
description This invention discloses a pre-stressing system for retrofitting of reinforced concrete members with externally bonded fibre-reinforced-polymer (FRP) laminates in bending. An FRP pre-stressing system includes a clamping unit (1), a light frame for hydraulic jack (2) and anchoring plates (3). The novel clamping unit (1) comprises tempered steel grips with corrugated gripping surfaces (4) which are tightened with high strength bolts (5) in a steel frame (6). This invention also discloses using the epoxy adhesive (8) on both upper and lower corrugated contact surfaces of the grips (4) and the FRP laminate (7) surface parts being clamped by said grips (4). The result is more effective clamping with very low slipping possibility. This invention provides retrofitting and reinforcement solutions for concrete slabs, wide beams, and also smaller beams, by using the threaded rods (10) and additional steel plates (11) instead of anchor bolts (9).
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An FRP pre-stressing system includes a clamping unit (1), a light frame for hydraulic jack (2) and anchoring plates (3). The novel clamping unit (1) comprises tempered steel grips with corrugated gripping surfaces (4) which are tightened with high strength bolts (5) in a steel frame (6). This invention also discloses using the epoxy adhesive (8) on both upper and lower corrugated contact surfaces of the grips (4) and the FRP laminate (7) surface parts being clamped by said grips (4). The result is more effective clamping with very low slipping possibility. 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subjects BUILDING
BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE
BUILDING MATERIALS
FIXED CONSTRUCTIONS
FORMS
HANDLING BUILDING MATERIALS ON THE SITE
REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS
SCAFFOLDING
SHUTTERING
STRUCTURAL ELEMENTS
title DEVICE AND METHOD FOR REINFORCING STRUCTURES WITH PRE-STRESSED FIBRE-REINFORCED-POLYMER LAMINATES
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