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Strain conglomerate for concrete structure test, and preparation method and application method thereof

A concrete structure and integrated body technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of easy damage, damaged coating, and inconvenient lead-out of wires, etc., and achieve the effect of high operability and convenient production

Inactive Publication Date: 2018-04-27
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the steel bars in the reinforced concrete structure are located inside the concrete, the strain gauges attached to the surface of the steel bars are easily damaged during the stress process of the reinforced concrete, and the wires are not easy to lead out. Especially in the bond-slip test of the coated reinforced concrete, the strain gauges attached to the The strain gauge outside the steel bar will also destroy the uniformity of the coating, resulting in local coating damage, and the traditional method of attaching strain gauges in the inner milling groove is easy to damage the overall mechanical performance of the steel bar. Therefore, this patent provides a steel bar Strain Measurement Method of Strain Integrated Body Embedded in Open Hole

Method used

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  • Strain conglomerate for concrete structure test, and preparation method and application method thereof
  • Strain conglomerate for concrete structure test, and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a strain aggregate for a concrete structure test, comprising:

[0026] Cutting the carrier with a certain modulus of elasticity into a strip carrier 1 according to the size;

[0027] Brush a layer of glue 2 on the carrier 1, and paste the strain gauge 3 on the glued carrier 1 at a certain interval;

[0028] After the glue is cured, punch a hole 4 at one end of the carrier 1, weld the wire on the strain gauge 3, lead the wire 5 from the hole 4 to the other side of the carrier, and then paint a layer on the carrier after the production is completed. glue. It includes a carrier 1, a strain gauge 3 on the carrier, and a wire 5 connected to the strain gauge 3, and the strain gauge 3 can be connected to a data acquisition system through the wire 5. In the strain integrated body, the carrier has a thickness of 1.1 mm and a width of 6 mm. The glue brushed on the carrier is resin glue. The diameter of the holes on the carrier is 2 mm. The wire is a co...

Embodiment 2

[0030] A method for measuring strain in a strain integrated body, comprising:

[0031] The first step: put the steel bar 7 on the lathe, drill a longitudinal hole 6 at the axis of the steel bar section, so that the hole is on the axis of the steel bar;

[0032] The second step: embedding the above-mentioned strain integrated body into the reinforcement hole 6;

[0033] Step 3: Pour the prefabricated filling material 8 into the steel bar hole 6, lightly shake, so that the filling material completely and evenly fills the steel bar hole 6, and let stand;

[0034] Step 4: Connect the wire 5 of the strain integrated body to an external data acquisition system.

[0035] The above-mentioned method for measuring strain is characterized in that the filler is mixed in proportion with high-quantity quartz sand, ordinary Portland cement, resin glue, and curing agent.

[0036] After the filler is solidified, the steel bar, the filler and the strain integrated body form a unity. Based on ...

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PUM

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Abstract

The invention provides a strain conglomerate for concrete structure test, and a preparation method and an application method thereof. According to the strain conglomerate, a carrier having a certain elasticity modulus is cut into stripped carriers 1 according to dimensions; a layer of glue is brushed on the carriers 1, and foil gauges 3 are pasted on the carriers 1 coated with the glue at certainintervals; holes are made at positions of one ends of the carriers after glue solidification, the foil gauges are welded with leads, the leads 5 are led from the holes 4 to the other side of the carrier, after making completion, a layer of glue is brushed on the carrier to form a foil gauge. The method for testing steel bar strain is advantaged in that on the condition that integrity of steel barscan be guaranteed, the steel bar strain can be accurately acquired, the method can be utilized in the concrete structure test and is particularly suitable for the reinforced concrete bonding slip test, making is convenient, and maneuverability is high.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to the measurement of steel bar strain in structural tests. Background technique [0002] In the structural test of reinforced concrete, it is generally necessary to measure the stress of the steel bar to observe the change of the steel bar stress and obtain the mechanical performance and bearing capacity of the structure. However, the stress of the steel bar is not suitable for direct measurement. The stress-strain relationship of the steel bar is converted to obtain the stress value of the steel bar. At present, in most cases, the strain gauge is pasted on the surface of the steel bar, and the strain value is measured by the strain measurement system. [0003] Since the steel bars in the reinforced concrete structure are located inside the concrete, the strain gauges attached to the surface of the steel bars are easily damaged during the stress process of the reinforced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/32
CPCG01B21/32
Inventor 刘志勇李明利吴江龙
Owner YANTAI UNIV