Device and method for simultaneously testing constant-temperature stress corrosion of multiple FRP (Fiber Reinforced Polymer) reinforcements

Abstract

The invention relates to a device for simultaneously testing constant-temperature stress corrosion of multiple FRP (Fiber Reinforced Polymer) reinforcements. The device comprises a counterforce frame, a soaking box and a stress test piece, wherein the soaking box and the stress test piece are located in the counterforce frame and are connected with a temperature controller; a plurality of through holes are correspondingly formed in each of left and right side plates of the soaking box, snapping grooves are vertically formed above the through holes of the left and right side plates of the soaking box, snapping plates are connected into the snapping grooves in a sealed manner, and a sliding door which can move horizontally is arranged on the top face of the soaking box; the stress test piece comprises a plurality of FRP reinforcements, tensioning anchor devices comprise bonding sleeve anchor devices and worms, the two ends of each FRP reinforcement are sequentially connected with one bonding sleeve anchor device and one worm, one of the worms is connected with a worm gear, and strain gages are arranged on the FRP reinforcements; the counterforce frame comprises a counterforce frame framework and counterforce frame side plates which are located at the left and right sides, and the worms respectively penetrate through the left and right sides and are fixedly arranged on the side faces of the counterforce frame. The device is used for carrying out stress corrosion only on the middle test section of the FRP reinforcement test piece and is simpler in operation.

Description

technical field [0001] The invention belongs to the technical field of long-term mechanical performance testing of FRP bars, and in particular relates to a test device and a test method capable of simultaneously performing constant temperature stress corrosion on multiple FRP bars. Background technique [0002] The durability of infrastructure caused by the corrosion of steel bars is severely reduced, causing huge economic losses. Therefore, improving the durability of infrastructure is an important issue facing the economic and social development of all countries in the world. The emergence of Fiber Reinforced Polymer (FRP) has brought hope for improving the durability of infrastructure. Compared with traditional structural materials such as steel, steel bars, and concrete, FRP materials have significant advantages such as excellent corrosion resistance, high specific strength, specific modulus, and good fatigue resistance, so they are considered to solve the problem of st...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are many constant-temperature salt solution immersion tanks, but there is a shortage of test devices that can simultaneously realize stress- and environment-coupled accelerated corrosion of FRP bars, and the existing few devices that can achieve stress corrosion are still difficult to control the constant temperature. The operation of the test piece is complicated, it is impossible to realize that multiple FRP bars are in the same corrosion environment, and the test piece takes up a lot of space.

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