Steel bar and concrete performance testing device and method

A technology of concrete and steel bars, applied in measuring devices, using mechanical devices, and applying stable tension/pressure to test material strength, etc. To achieve the effect of preventing the eccentric damage of steel bars, eliminating the phenomenon of unloading, and occupying a small area

Inactive Publication Date: 2016-11-16
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with this method is that after multiple tests, the four steel rollers will relax to varying degrees, resulting in eccentric tension and tearing of the specimen
However, the problem with this method is that there is an unloading phenomenon (that is, a phenomenon of load reduction) in the hydraulic jack, especially the greater the load, the faster the unloading
In addition, manual hydraulic jack loading is difficult to accurately control the loading value, and the holding time is also difficult to guarantee

Method used

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  • Steel bar and concrete performance testing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] figure 1 It is a schematic diagram of the overall structure of a steel bar and concrete performance testing device of the present invention. Such as figure 1 As shown, the device of the present invention includes an upper beam 1, a first support rod 21, a second support rod 22, a claw 3, a first lead screw 41, a second lead screw 42, a loading frame 5, and a base 6, wherein the upper The beam 1, the first support rod 21, the second support rod 22 and the base 6 are detachably connected into a frame shape, the claw 3 is detachably connected on the upper beam 1, and the first lead screw 41 and the second lead screw 42 are connected via The bearing (not shown) is connected with the upper beam 1 and the base 6 and is driven to rotate by a motor (not shown). The loading frame 5 is detachably set on the first lead screw 41 and the second lead screw 42. When the bar 41 and the second leading screw 42 rotate, the loading frame 5 moves up and down to complete the loading. The...

Embodiment 2

[0045] Except that the first lead screw 41 and the second lead screw 42 in embodiment 1 are replaced by ball screws with screw rods, other components and parameters are the same as in embodiment 1.

Embodiment 3

[0047] Except that the bearing in embodiment 1 is replaced by an axial thrust bearing by a radial bearing, other components and parameters are the same as in embodiment 1.

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Abstract

The invention discloses a steel bar and concrete performance testing device and method. The device comprises a tensile testing zone and a pressure testing zone. The tensile testing zone can conduct central drawing testing on steel bar and concrete bonding performance. The pressure testing zone can conduct mechanical performance testing on concrete test blocks and girders. The device and the method adopts a structure of loading by adopting lead screws on two sides, an eccentric damage phenomenon of steel bars when central drawing testing is performed by adopting a conventional device can be prevented, and the unloading phenomenon of a hydraulic jack can be eliminated.

Description

technical field [0001] The invention relates to a performance testing device and method for steel bars and concrete, in particular to a performance testing device and method for steel bars and concrete in the field of construction engineering. Background technique [0002] In the field of construction engineering, steel bars and concrete are the two most common materials, and their respective properties and their bonding properties directly affect the engineering quality of construction projects. At present, for the bond performance test of steel bar and concrete, the test method of central pull is generally used. This method adopts the loading method of single-end pulling and is carried out on a universal testing machine. In order to facilitate the test to go smoothly, the test piece is placed in a specific fixture during the test. The fixture is composed of an upper panel, a lower bottom plate and four steel rollers. The upper and lower ends of the four steel rollers are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N19/04
CPCG01N3/08G01N19/04
Inventor 王晨霞曹芙波尹润平张杰郭磊李骏骁
Owner INNER MONGOLIA UNIV OF SCI & TECH
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