Device and method for concrete interior strain testing

A strain testing and concrete technology, applied in electromagnetic measuring devices, electrical/magnetic solid deformation measurement, etc., can solve the problems of unfavorable implantation, large volume of optical fiber sensors, high cost, and achieve the effect of good coordination of deformation ability.

Inactive Publication Date: 2015-07-22
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows researchers to test how well they are able to resist damage caused by stress on cement-based materials like roads or buildings during construction without adding extra weight that could be harmful if applied externally over time.

Problems solved by technology

This patented technical solution describes an apparatus and process for accurately detecting changes caused by external forces applied during construction work without requiring expensive equipment such as resistive strains gauge wires.

Method used

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  • Device and method for concrete interior strain testing
  • Device and method for concrete interior strain testing
  • Device and method for concrete interior strain testing

Examples

Experimental program
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Embodiment 1

[0031] refer to Figure 1-2 , a method for concrete internal strain testing, comprising the following steps:

[0032] 1) According to the test plan, the number of internal measuring points of the concrete, this embodiment is the case where the internal measuring point is 1, and the base sheet 1 corresponding to it is processed and manufactured; the base sheet 1 is pasted with rosettes 11 and A lead sheet 12 coated with a layer of waterproof glue; the left and right ends of the lead sheet 12 have a recess 121 respectively, and the four corners of the lead sheet 12 are respectively provided with connection holes 122, and the lead sheet 12 A grip enhancing hole 123 is respectively provided on the left and right sides close to the recessed portion 121 .

[0033] In order to accurately reflect the internal strain of concrete, it is necessary to select a material with a similar elastic modulus and better coordinated deformation ability as the base sheet 1 to paste the strain rosett...

Embodiment 2

[0042] In this embodiment, there are plural internal measuring points, and there are plural corresponding base sheets; the four vertices of the plural base sheets are connected in series with connecting wires and then fixed to the template.

[0043] In addition, the wires drawn from the rosettes of the plurality of base sheets are fixed to the outside of the concrete test specimen after being bundled and bound, and are separated from the concrete test specimen by a safe distance; thus, the pouring of concrete is not affected.

[0044] When pouring concrete, stop whenever the pouring reaches the position where there is a base sheet, vibrate, and after compaction, adjust the predetermined position and orientation of the base sheet, and then pour to cover the base sheet; repeat this until all The base sheets are covered.

[0045] Every remaining part is the same as that of Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a device for concrete interior strain testing. The device comprises a template, at least one substrate sheet and connecting wires, wherein the template is used for pouring of a concrete test piece. The substrate sheet is arranged at a test point in the concrete test piece, and is a lead sheet, wherein strain rosettes adhere to the lead sheet, and a waterproof adhesive coats the lead sheet; wires are led by the strain rosettes out of the concrete test piece; two sunken portions are arranged at the left end and the right end of the lead sheet respectively, connecting holes are formed in the four vertex corners of the lead sheet, and two bond stress reinforcing holes are formed in the portions, close to the sunken portions, of the left side and the right side of the lead sheet respectively. The connecting wires penetrate through the connecting holes to achieve fixed connection between the four vertex corners of the substrate sheet and the template. The invention further provides a method for concrete interior strain testing. When the device and method for concrete interior strain testing are utilized, strain at the predetermined position of the interior of concrete can be tested, and therefore the conditions of interior deformation and cracking of a concrete structure under the action of the exterior load can be conveniently researched.

Description

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Claims

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Application Information

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Owner HUAQIAO UNIVERSITY
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