Loading device for corrosion test of steel-concrete bonded specimens under stress

Abstract

The invention discloses a loading device of a corrosion test of a reinforcing steel bar-concrete bonding sample under a stress action. The loading device comprises a rack, a loading mechanism, a sample fixture, a stress applying lever and a connecting rod, wherein the loading mechanism is a weighing lever mechanism using a metering lever as a main body, the force applying lever is arranged below the metering lever, the force applying lever is hinged with the rack by virtue of a pivot knife bearing group of the force applying lever; the upper end of the connecting rod is connected with a weight knife bearing of the metering lever, the lower end of the connecting rod is hinged with the end part of the force applying lever by virtue of a force arm knife bearing group of the force applying lever; the sample fixture is hinged with the force applying lever by virtue of the weight knife bearing group of the force applying lever. The loading mechanism of the loading device is the weighing lever mechanism using the metering lever as the main body, an applied force is visually and conveniently read, a large-size lever is adopted for the force applying lever so that a relatively high stress is applied to a test piece conveniently and the knife bearing groups are adopted as hinge points, and the force applying precision is high.

Description

[Technical field] [0001] The invention relates to a loading device for a corrosion test of reinforced concrete, in particular to a loading device for a corrosion test of a steel bar-concrete bond sample under the action of stress. [Background technique] [0002] Bearing load is the main mission and inherent characteristic of reinforced concrete structure. The magnitude and form of load will have different effects on the mechanical properties of reinforced concrete, resulting in stress corrosion of reinforced concrete. The interfacial bonding properties of reinforced concrete are the premise of the work of the two materials of reinforced concrete, and it is also the guarantee for the best performance of the composite material and structure of reinforced concrete. Stress corrosion will directly affect the interfacial bonding properties of reinforcement and concrete, resulting in changes in the long-term performance of reinforced concrete structures. In addition, due to the un...

AI Technical Summary

Problems solved by technology

This invention can overcome the stress relaxation problem of the spring applied force, but this loading device has the following disadvantages in use: 1) it cannot be used to apply stress corrosion to the steel bar-concrete bonded test piece; and 2) it adopts two force rollers To apply stress, two scales are needed. The magnitude of the applied force is not intuitive, and the calculation of the stress is troublesome. At the same time, the lower beam needs to be equipped with a scale, and the rigidity is low, so it is impossible to apply a large stress to the specimen; 3) The force application device adopts ordinary The articulation method, the accuracy of force application is low

Images