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Tension stress loading and deformation measuring device and method for measuring deformation amount of concrete test piece under tension stress

A technology for measuring devices and tensile stress, which is applied in the direction of measuring devices, mechanical solid deformation measurement, instruments, etc., can solve the problems of not being able to realize the measurement of deformation loading devices, etc., to achieve analysis and research, multiple functions, and accurate test results Effect

Active Publication Date: 2014-04-09
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the current loading device mainly focuses on realizing the convenient operation of the loading device, reducing stress relaxation, increasing stability, saving equipment investment and reducing corrosion of sensing elements, etc., and has not been able to realize the process of measuring the tensile stress and environmental factors of the sample. Loading device with medium deformation

Method used

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  • Tension stress loading and deformation measuring device and method for measuring deformation amount of concrete test piece under tension stress
  • Tension stress loading and deformation measuring device and method for measuring deformation amount of concrete test piece under tension stress
  • Tension stress loading and deformation measuring device and method for measuring deformation amount of concrete test piece under tension stress

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A typical operation process is as follows:

[0035]The first step: set the positioning fixture 12 on the test piece 10, bond one end of the test piece 10 to the top of the bottom joint 11 with epoxy resin, and fix the bottom joint 11 on the frame 2 with nuts; The other end of the test piece 10 is bonded to the bottom end of the spherical joint 9 .

[0036] Step 2: Rotate the hand wheel 1 to compress the compression spring 6, so that the slide rod 5 extends a suitable distance, and insert the spherical end of the spherical joint 9 into the concave joint 8 at the bottom of the slide rod 5; then reverse Rotate the hand wheel 1 in the direction to make the compression spring 6 rise to a suitable deformation amount, and the tensile stress loading is completed so far.

[0037] Step 3: place the positioning fixture 12 on the top of the test piece 10 close to the spherical joint 9, tighten the positioning bolt 13, fix the positioning fixture 12 on the test piece 10, and ensure...

Embodiment 2

[0040] The difference from Example 1 is that the test piece 10 that has completed all the steps of Example 1 is placed together with the loading device under the action of environmental factors such as aggressive solutions, dry-wet cycles, freeze-thaw cycles, carbonization, etc., and then the environmental Factor and measurement of deformation of concrete under tensile stress.

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Abstract

The invention relates to a tension stress loading and deformation measuring device which comprises a hand wheel with a screw rod, wherein the screw rod is screwed on a frame with a cross beam; the bottom end of the screw rod is connected with a sliding rod; a corrected compression spring is sleeved on the sliding rod and is arranged between the bottom of the screw rod and the cross beam; the bottom end of the sliding rod is provided with a concave joint and penetrates through the cross beam; the concave joint is connected with a spherical hinge joint; the bottom end of the spherical hinge joint is adhered to a test piece through epoxy resin; the test piece is vertically arranged in the frame, and the bottom end of the test piece is adhered to a bottom joint through epoxy resin; the bottom joint is fixedly arranged on the frame; a positioning fixture with a ribbed plate is sleeved on the test piece; and the ribbed plate is provided with an adjusting bolt and is in good contact with a dial gauge measuring head arranged on the cross beam. According to the tension stress loading and deformation measuring device, tension stress is output through the hand wheel and the spring, the deformation amount can be measured by a dial gauge, and the influence of stress relaxation size and environmental effect on the durability of the test piece can be accurately analyzed.

Description

technical field [0001] The invention relates to the research and test of the durability performance of slurry and soil type building materials, in particular to a loading device capable of loading tensile stress and measuring deformation. The device is suitable for studying the damage law and degradation mechanism of durability performance of grout, mortar, concrete or other massive building materials under the coupled action of load and environmental factors. Background technique [0002] The durability of concrete is closely related to its service life. Practice has proved that the degradation of concrete durability is the result of the coupling of load and environmental factors. Therefore, it is necessary to establish experimental conditions for simulating the coupling of load and environmental factors, and to study the damage law and degradation of the durability of concrete and its raw materials under load and environmental factors. It has very important social and eco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01B5/30
Inventor 姚燕王阵地王玲
Owner CHINA BUILDING MATERIALS ACAD