Steel Strand Fatigue Testing Machine

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Product Introduction

PLW Steel Strand Fatigue testing machine

Equipment introduction:

The equipment adopts electro-hydraulic servo structure and control to complete the fatigue test of the steel strand anchorage, which can realize sine wave, square wave, sawtooth wave and other waveform loading, and the waveform is perfect. At the same time, other fatigue tests can be performed by replacing the fixture, such as: fastener fatigue test, rail bending fatigue test, component bending fatigue test, etc. Due to the electro-hydraulic servo loading method, its frequency can be accelerated, so that the test time can be greatly shortened.

The host adopts a four-column high-rigidity structure design, which consists of a host frame, an actuator, a spoke-type load sensor, a displacement sensor, and a fixture. The upper beam is hydraulically driven to move up and down to adjust the test space. The actuator is placed on the upper beam, and a special fatigue load sensor is installed on the piston head of the actuator. Different types of fatigue fixtures can be configured to adapt to different types of fatigue tests. The upper beam adopts hydraulic lifting, the beam adopts hydraulic clamping device, and the whole frame adopts the design method of no gap connection.

The product conforms to ASTMA416/A416M-17a Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete, GB/T14370-2007 Anchorage,grip and coupler for prestressing tendons, JT/T 329.2-1997 Test methods and inspection rules of prestressing strand anchorage and coupler for highway bridge, TB/T 3193-2008 Technical conditions of anchorage,grip and coupler for prestressing tendons in railway construction, JGJ85-2002 Technical specification for application of anchorage,grip and coupler for prestressing tendons.

Product Features:

The position of the chuck is easy to adjust, and the position of the actuator piston is steplessly digitally adjustable;

Wide range, no need to replace the actuator, a single actuator can adapt to different samples;

It adopts special fatigue-grade load sensor with long service life;

Digital adjustment of frequency and amplitude, simple operation, no need to adjust the oil source system;

The test load amplitude (or valley value) is digitally set, and the control system automatically adjusts to the given value, and then it starts to vibrate and enters the fatigue test state;