A prestressed frp tendon bolt anchor head
A prestressing and anchoring technology, which is applied in construction, sheet pile walls, foundation structure engineering, etc., can solve the problems that the steel anchoring locking method cannot be used, and the shear strength of FRP bars is insufficient, so as to achieve a scientific and reasonable tensioning anchoring method. Meet the reliability requirements and the effect of strength guarantee
Active Publication Date: 2016-11-30
HOHAI UNIV
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Due to the insufficient shear strength of FRP bars, which is lower than that of steel bars, when testing the tensile strength of bars and applying prestress, the anchoring and locking device at the connection between the end of the rod body and the structure needs to be specially designed, and the anchoring and locking method of steel bars cannot be used
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] see figure 1 , figure 2 and image 3 As shown, the design of this device is to set threads on the inside and outside of the steel casing 3 according to the prestress and steel quality, and design the supporting tie rod 1, tension nut 2, lock nut 4, positioning ring 5 and sealing ring 6 at the same time. The outer side of the positioning ring 5 is threaded, and the middle hole is set in the center to fix the anchor rod 8. At the same time, the positioning ring 5 prevents the expansion agent 7 from entering the inner threaded section of the steel casing; A self-locking system is formed to limit the relative slippage between the steel casing 3 and the anchor rod 8. At the same time, the seal ring 6 is embedded in the end gap between the anchor rod 8 and the inner wall of the steel casing 3 to seal. When the anchor head is stressed, the seal The steel ring 6 is pressed into the steel casing 3 and the expansion agent 7 is pressed, the compactness is improved, the relative...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an FRP rib anchor rod anchoring head capable of applying prestress. The FRP rib anchor rod anchoring head comprises a pull rod, a stretching nut, a steel sleeve, a locking nut, a positioning ring and a sealing ring, wherein threads are formed in the outer side of the positioning ring and connected with the threads in the inner side of the steel sleeve; a medium hole is used for fixing and positioning an anchor rod; a self-locking system is formed between the steel sleeve and the anchor rod according to the expansion feature of an expansion agent and is used for limiting the relative sliding of the steel sleeve and the anchor rod; meanwhile, the sealing ring can be embedded into an end gap between the anchor rod and the inner wall of the steel sleeve to be sealed. According to the FRP rib anchor rod anchoring head, the stretching anchoring manner is scientific and reasonable, simple and convenient; some devices can be recycled, and the strength can be ensured; the reliability requirement on application of prestress of the FRP anchor rod can be met; in addition, the sliding quantity of the steel sleeve and the anchor rod can be controlled after loading.
Description
technical field [0001] The invention relates to an FRP tendon anchor head capable of applying prestress. Background technique [0002] FRP bars have the advantages of high tensile strength, corrosion resistance, low modulus, and light weight. They are suitable for prestressed anchor structures and become durable reinforcement measures for slopes and other projects. [0003] Due to the insufficient shear strength of FRP bars, which is lower than that of steel bars, when testing the tensile strength of bars and applying prestress, the anchoring and locking device at the connection between the end of the rod body and the structure needs to be specially designed, and the anchoring and locking method of steel bars cannot be used. [0004] Therefore, there is a need for a new prestressed FRP tendon anchor head to solve the above problems. Contents of the invention [0005] Purpose of the invention: The present invention aims at the defects of the fatigue testing machine in the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/76
Inventor 李国维吴玉财贺冠军刘学余亮刘龙
Owner HOHAI UNIV