The invention discloses a constant-
temperature stress corrosion testing device and method for an FRP (
fiber reinforced
polymer)
tendon. The device comprises a stretch-draw frame, threaded anchors, a three-way
pipe, a spring, a counter force frame, a lifting jack, a
force sensor and a stretch-draw anchor rod. Certain stretch-draw stress is applied to the FRP
tendon by utilizing the stretch-draw frame, the counter force frame, the lifting jack and the
force sensor, and the FRP
tendon is fixed by a nut, and the stress loss is compensated by the compression spring, and the
constant stress level can be kept for a long time. A
corrosion solution soaking environment is provided through a method that a
corrosion solution is filled into a home-made PVC
pipe device fixed in the middle of the FRP tendon, so that the FRP tendon is in the corrosion solution soaking environment for a long time. After the corrosion solution is filled completely and the prestress is stretched and drawn, the whole stretch-draw frame for stretching and drawing the FRP tendon is put into a constant-temperature constant-
humidity test box so as to guarantee the long-term constant-temperature environment. After the constant-temperature corrosion, the device is unloaded through the steps the same with the stretch-draw step, the FRP tendon is taken down for a stretch test. The method comprises the following steps of: anchoring the FRP tendon, fixing through stretching and drawing, corroding at constant temperature, unloading and carrying out the stretch-draw test.