Simple positioning mold for pull-out test for steel bar

Abstract

The invention discloses a simple positioning mold for a pull-out test for a steel bar. The simple positioning mold comprises a base. Two positioning covers are slidably mounted on the upper end of thebase by two sliders. The two positioning covers are fixedly connected by a bracket. A semicircular groove is arranged on the upper end of the positioning cover. A steel bar is arranged on the inner side of the semicircular groove. A concrete block is arranged on the inner side of the positioning cover. A first threaded sleeve is fixedly mounted on the inner side of a mounting hole. A first bolt is mounted on the inner side of the first threaded sleeve. A rubber pad is arranged at the end of the first bolt. A pressure plate is arranged on the inner side of the positioning cover. The pressure plate is slidably connected to the positioning cover through a limiting rod. A connecting sleeve is fixedly mounted on the middle portion of the pressure plate. The connecting sleeve is rotatably connected to a second bolt. The second bolt is arranged on the inner side of a second threaded sleeve. The positioning mold can conveniently fix the concrete block and prevent the concrete from moving inside the positioning cover, which affects the pull-out test for the steel bar.

Description

technical field [0001] The invention belongs to the technical field of steel bar drawing test, and in particular relates to a simple and convenient positioning die for the steel bar drawing test. Background technique [0002] Fatigue load degrades the bond performance of reinforced concrete structures, which leads to a decrease in the ultimate bearing capacity of components and brittle failure. Considering the effect of fatigue loading on the degradation of bond-slip properties in reinforced concrete structures is very important for the calculation and analysis of the bearing capacity of existing structures. The steel pull-out test is the main method to study the bond performance of reinforced concrete. The bond-slip performance of reinforced concrete is the basic mechanical property of concrete. The bond-slip performance of reinforced concrete can be measured by the center-drawing test method. Record data. [0003] At present, the positioning mold in use only fixes the u...

AI Technical Summary

Problems solved by technology

[0003] At present, the positioning mold in use only fixes the upper end of the base of the concrete block, and does not perform limit and fix operation on the concrete block. During the drawing process, it is easy to cause the concrete block to move inside the positioning cover, thereby affecting the The test data of the pull-out test reduces the accuracy of the test, so it is necessary to design a new type of simple positioning die for the pull-out test of steel bars and put it into use

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