Prestress FRP sheet shear-resistant reinforced concrete beam experimental device

A technology of concrete beams and FRP sheets, which is applied in bridge reinforcement, bridges, bridge maintenance, etc., can solve the problems of easy corrosion of steel plates, influence of interface bonding performance, and large increase in the self-weight of concrete beams. Extensive, performance-improving effects

Active Publication Date: 2017-06-13
江苏纬信工程咨询有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the above reinforcement methods have the following disadvantages: 1) It is impossible to quickly repair damaged concrete beams. For example, the tension anchoring device of the external prestressing method is complicated, and the section enlargement method requires planting steel bars, supporting formwork, pouring concrete, etc.
2) The steel plate is easy to corrode, which seriously affects the interface bonding performance
3) The self-weight of the concrete beam increases greatly
[0004] Despite the aforementioned advantages, the technology of externally attaching ordinary FRP sheets to strengthen concrete structures still faces some important problems that cannot be avoided in engineering applications: 1)

Method used

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  • Prestress FRP sheet shear-resistant reinforced concrete beam experimental device
  • Prestress FRP sheet shear-resistant reinforced concrete beam experimental device
  • Prestress FRP sheet shear-resistant reinforced concrete beam experimental device

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0042] The prestressed FRP sheet anti-shear strengthening concrete beam experimental device of the present invention includes a steering device 2 arranged at the junction of the flange plate and the web of the concrete beam, an anchoring device 3 at the front end of the FRP sheet, a steel bead 5 in the middle of the FRP sheet, and an FRP sheet Anchor device at back end of sheet 4, FRP sheet tension end fixture 10, front steel plate at tension end 12, rear steel plate at tension end 13, jack 14, limit device 6, stabilizing device 7, jack support 17, tension stand 19. Polytetrafluoroethylene plate 18. Screw rod 11 connected to the clamp at the tension end of the FRP sheet and passing through the steel plate at the front of the tension end and the steel plate at the rear of the tension end.

[0043] The steering device 2 includes an inner steering block 20 embed...

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Abstract

The invention discloses a prestress FRP sheet shear-resistant reinforced concrete beam experimental device. The prestress FRP sheet shear-resistant reinforced concrete beam experimental device comprises a concrete beam, a stretching-drawing pedestal directly facing one side of a concrete beam web, a steering device arranged on the joint of a concrete beam flange plate and the web, an FRP sheet front end anchoring device arranged at the bottom end of the concrete beam web, an FRP sheet middle steel pressing strip arranged in the middle of the concrete beam web, an FRP sheet rear end anchoring device arranged on the lower side of the outer end of the concrete beam flange plate, a limiting device, a stabilizing device, a jack transversely fixed to the stretching-drawing pedestal, a stretching-drawing end front steel plate, a stretching-drawing end rear steel plate, a screw penetrating through the stretching-drawing end front steel plate and the stretching-drawing end rear steel plate, and an FRP sheet stretching-drawing end clamp arranged on the part, near one end of the concrete beam, of the screw. The limiting device and the stabilizing device are arranged on the side face of the concrete beam web. The stretching-drawing end front steel plate and the stretching-drawing end rear steel plate are located on the two sides of the jack. The prestress FRP sheet shear-resistant reinforced concrete beam experimental device is simple to manufacture, fast and convenient to install and capable of applying prestress to an FRP sheet and then pasting the FRP sheet onto the side face of the concrete beam, and the function of shear-resistant reinforcement is achieved.

Description

technical field [0001] The invention belongs to the fields of civil engineering, construction engineering, highway engineering and municipal engineering, and relates to a prestressed FRP sheet anti-shear reinforcement concrete beam experimental device. Background technique [0002] Prestressed concrete T-section beams (T-beams) and prestressed concrete box-section beams (box girders) are commonly used concrete beams in building structures and bridge structures. In recent years, oblique cracks often appear in the webs of T-beams and box girders in highway bridges due to overloading, natural environment and cracking of material properties, which need to be reinforced. [0003] The traditional strengthening methods of T girder and box girder mainly include enlarging section method, sticking steel plate method, external prestressing method, conversion system method, etc. However, the above reinforcement methods have the following disadvantages: 1) The damaged concrete beam ca...

Claims

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Application Information

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IPC IPC(8): E01D22/00E04G23/02
CPCE01D22/00E04G23/0218
Inventor 王文炜戴建国石劭阳宋元印田俊朱忠锋郑宇宙曹晓波
Owner 江苏纬信工程咨询有限公司
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