GB-T14370-2007 Anchorage,grip and coupler for prestressing tendons
Packaging & Delivery
cartons or wooden case.
5-15 working days
Post stressing prestressed round anchor
. Its key part material:
work anchorage head:45# or 40Cr work gripper :20CrMnTi
.hardness: work anchorage head:≤33HRC (306 HBS) work gripper :78~86HRA
.static load performance testing:
anchoring efficiency coefficient:ηa≥0.95; total strain: εapu≥2.0%
Matched tensioning device:
YCQQ series jack, ZB4-500 hydraulic pump
.anchorage structure diagram:
1. working gripper 2.working anchorage head 3. bearing plate
4. spiral reinforcement 5. duct 6. stranded wire
. The installation diagram of stressing anchorage and jack
The design and the manufacturing standard are according with the national standard<Anchorage, grip and coupler for prestressing tendons> and relevant industry standard. The index of the performance can meet:
1.Performance of anchor static loading:
Anchoring efficiency of the assembly part of anchor steel strandηa≥0.95;
Limit strain of the assembly part of anchor strand steelεapu≥2%.
2.Performance of circle loading:
The component of the steel strand is about 100MPa/min speed. It is loading to 80% of the standard strength of steel strand, and then unload to 40%, load to 80% again, it repeats 50 cycles, the anchor and the steel strand are without damaging.
3.Performance of anchor:
Bearing 2 million circles loading, stress amplitude is 80 MPa , the limited stress is 65% of the standard strength of steel strand, the breaking area is not more than 5% original area after test.