CONCRETE STRUCTURE MEMBER STRENGTHENED WITH PRESTRESSED FRP ELEMENTS

• US 20130183497A1
• Filed: 12/08/2010
• Published: 07/18/2013
• Est. Priority Date: 07/16/2010
• Status: Active Grant

• Current Assignee: Southeast University
• Original Assignee: Southeast University
• Inventors: Wu, Zhishen, Wu, Gang, Iwashita, Kentaro, Zhang, Min, Jiang, Jianbiao
• Granted Patent: US 9,322,172 B2
• Time in Patent Office: Days
• US Class Current: 428/172
• CPC Class Codes: B32B 13/12 of synthetic resin
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: E04C 5/073 Discrete reinforcing elements, e.g. fibres
• CPC Class Codes: E04C 5/085 Tensile members made of fiber reinforced plastics
• CPC Class Codes: E04G 2023/0255 whereby the fiber reinforced plastic elements are stressed
• CPC Class Codes: E04G 23/0218 Increasing or restoring the load-bearing capacity of building construction elements E04G23/0203 and E04G23/0266 take precedence
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/249921 Web or sheet containing structurally defined element or component

Abstract

A concrete structure member strengthened with prestressed FRP elements includes a concrete structure body and a prestressed FRP element arranged on the former. An epoxy resin overlay surrounding the prestressed FRP element is provided to wrap it up, and a polymer concrete supplemental layer is provided outside the epoxy resin overlay. The concrete structure member can uniformly and effectively transfer the stress from the prestressed FRP element.

Claims

1. A concrete structure member strengthened with prestressed FRP bar, comprising prestressed FRP bar and a concrete structure member body, wherein, the prestressed FRP bar is arranged on the concrete structure member body, an epoxy resin cladding layer is arranged around the prestressed FRP bar to surround the prestressed FRP bar, and a polymer-concrete thickening layer is arranged outside of the epoxy resin cladding layer.

2. The concrete structure member strengthened with prestressed FRP bar according to claim 1, wherein, a groove is made on the bottom surface of the concrete structure member, the prestressed FRP bar is arranged in the groove;

the epoxy resin cladding layer is filled into one part of the groove and surrounds the prestressed FRP bar, and the polymer-concrete thickening layer is filled into the rest part of the groove.

3. The concrete structure member strengthened with prestressed FRP bar according to claim 2, wherein, the polymer-concrete thickening layer forms a dome shape on the bottom surface of the concrete structure member body.

4. The concrete structure member strengthened with prestressed FRP bar according to claim 2, wherein, the depth and the width of the groove are equal to each other, and are 1.5 times of the diameter of the prestressed FRP bar.

5. The concrete structure member strengthened with prestressed FRP bar according to claim 1, wherein, the prestressed FRP bar, epoxy resin cladding layer, and polymer-concrete thickening layer are arranged on the bottom surface of the concrete structure member, and the polymer-concrete thickening layer bonds the prestressed FRP bar and epoxy resin cladding layer to the bottom surface of the concrete structure member body.

6. The concrete structure member strengthened with prestressed FRP bar according to claim 5, wherein, the polymer-concrete thickening layer is in a dome shape.

7. The concrete structure member strengthened with prestressed FRP bar according to claim 3, wherein, the depth and the width of the groove are equal to each other, and are 1.5 times of the diameter of the prestressed FRP bar.