A Simple Positioning Die for Steel Bar Pulling Test

Abstract

The invention discloses a simple and convenient positioning mold for steel bar drawing test, which comprises a base, and two positioning covers are slidably installed on the upper end of the base through two sliders, and the two positioning covers are fixedly connected by corner codes. The upper end of the positioning cover is provided with a semicircular groove, the inner side of the semicircular groove is provided with a steel bar, the inner side of the positioning cover is provided with a concrete block, the inner side of the mounting hole is fixedly installed with a first threaded sleeve, and the first The inner side of the threaded sleeve is rotated with a first bolt, the end of the first bolt is provided with a rubber pad, the inner side of the positioning cover is provided with a pressing plate, and the pressing plate is slidingly connected with the positioning cover through a limit rod. A connecting sleeve is fixedly installed in the middle of the connecting sleeve, and the connecting sleeve is rotatably connected with the second bolt, and the second bolt is arranged on the inner side of the second threaded sleeve. The positioning mold can conveniently fix the concrete block, and prevent the concrete from moving inside the positioning cover, which will affect the pull-out test of 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

Images