Reinforced concrete bond slip testing device

Abstract

The invention relates to the technical field of experimental equipment, in particular to a reinforced concrete bond slip testing device which comprises a fixing assembly, a loading assembly and a measuring assembly, the fixing assembly is used for fixing a concrete block of a test piece, the loading assembly comprises a driving piece and two loading plates, and the driving piece is connected withthe two loading plates; the two loading plates are oppositely arranged in the loading direction, the two loading plates are located on the two sides, in the axial direction of the steel bar, of the concrete block of the test piece correspondingly and located between the two anchors of the test piece, and the measuring assemblies are arranged on the loading plates and used for measuring the relative sliding amount of the steel bar of the test piece and the concrete block. A bidirectional pull-out test can be carried out on a reinforced concrete test piece under the action of repeated loads, a bidirectional loading process is realized, and the stability of the test loading process is ensured. The method can effectively determine the bond slip performance of the reinforced concrete under theaction of repeated loads, and the obtained result can truly reflect the bond performance between the steel bar and the concrete in actual engineering.

Description

technical field [0001] The invention relates to the technical field of experimental equipment, in particular to a test device for bonded slip of reinforced concrete. Background technique [0002] At present, in reinforced concrete, the bonding force between the steel bar and the concrete is the basis for the two to work together, but the stress state of the bonded part between the steel bar and the concrete is complicated, and it is difficult to directly observe and analyze its failure mechanism. Therefore, the pull-out test is usually used Direct determination of steel-concrete bond-slip properties. The pull-out test device that is widely used in the laboratory can generally only realize the one-way pull-out test, but in actual engineering, reinforced concrete is mostly under repeated loads, and the bond strength between steel bars and concrete is much lower than that of the one-way pull-out test. The measured bond strength, therefore, only adopts the one-way pull-out test...

AI Technical Summary

Problems solved by technology

The pull-out test devices that are widely used in laboratories can generally only achieve one-way pull-out tests, but in actual engineering, reinforced concrete is mostly under repeated loads, and the bond strength between steel bars and concrete is much lower than that of one-way pull-out tests. The measured bond strength, therefore, only using the one-way pull-out test to measure the bonding performance of steel bars and concrete results has a large deviation, which is not scientific and accurate enough

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