1、 Equipment function:
Mainly used for testing the anchoring coefficient of steel strands in railway, bridge, building, power and other infrastructure construction, it should meet the technical requirements of porous static load anchoring performance testing according to relevant national regulations. Digital servo pumps should be used for automatic loading control, which have the characteristics of high control accuracy and good stability. The measurement and control unit should use high-precision sensors and electronic components to form the measurement and control system of the testing machine, with functions such as dynamic display of test process data and curves, editing of test data, browsing of curves, local magnification, overlay comparison, etc. It can automatically calculate parameters such as ultimate tension, total strain at ultimate tension, anchoring efficiency coefficient, etc., and can print test reports and curves. Meet the mechanical performance test requirements of GB/T14370 "Anchors, fixtures, and connectors for prestressed steel bars" and JT/T329 "Anchors, fixtures, and connectors for prestressed steel strands in highway bridges".
2、 Performance characteristics:
1. The entire process is not divided into stages, with real-time digital display of load, displacement, peak load, peak displacement, and loading speed;
2. Fully computerized automatic control, using closed-loop control strategy to achieve load control;
3. Load measurement accuracy range: 2% -100% FS;
4. Accuracy of pressure measurement: ≤± 1%;
5. Pressure measurement accuracy range: 5% -100% FS;
6. Pressure speed control accuracy: ≤± 5%;
7. Real time display of load time, load displacement, and displacement time curves;
8. The control steps can be freely edited according to the experimental requirements;
At the end of the experiment, the test result data can be automatically calculated and saved, and users can query and print the test report;
10. It has multiple protection measures such as pressure overload and piston limit.
3、 Main technical parameters:
1. Testing machine testing force: 6500kN
2. Accuracy level: Level 1
3. Effective load measurement range: 2% to 100%
4. Load measurement accuracy: better than ± 1% of the indicated value, full range without grading
5. Relative error of displacement rate control: ± 1%
6. Repeatability: ± 0.5%.
7. Relative resolution: ± 0.5%
8. Long term stability: ± 1%
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