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Testing device and method for testing hooping effect of concrete filled steel tube arch rib

A steel tube concrete arch and testing device technology, applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problems of large impact force, low survival rate, difficult sensor installation, etc., and achieve reduction Destroy, increase survival rate, avoid direct impact damage effects

Pending Publication Date: 2021-10-08
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the arch ribs of concrete-filled steel pipe arch bridges in the prior art will generate a relatively large impact force during vacuum-assisted pouring, resulting in difficult installation of sensors in steel pipes, low survival rate, and inability to test radial action. A test device and method for testing the hoop effect of steel pipe concrete arch ribs, by providing a stable installation environment for the strain gauge inside the steel pipe, providing implementation conditions for the strain gauge to test the radial force of the steel pipe on the concrete

Method used

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  • Testing device and method for testing hooping effect of concrete filled steel tube arch rib
  • Testing device and method for testing hooping effect of concrete filled steel tube arch rib
  • Testing device and method for testing hooping effect of concrete filled steel tube arch rib

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Embodiment 1

[0044] A test device for testing the hoop effect of CFST arch ribs, such as figure 1 , figure 2 , including strain gauges, and also includes a protective shell 1 with an opening surface 11 and a mounting seat 2 for connecting the inner wall of the steel pipe 4, the strain gauge is installed on the inner wall of the protective shell 1, and the protective shell 1 is a steel member with the same label as the steel pipe 4, The protective shell 1 is fixedly connected with the mounting base 2, and the inner cavity of the protective shell 1 is used for filling expansive concrete. The expansive concrete is pre-filled concrete with the same grade as the concrete to be poured in the steel pipe 4 .

[0045] The concrete to be poured wherein is actually also expansive concrete in construction in this field. The inner cavity of the protective shell 1 is preferably pre-filled with expansive concrete so that the solidified expanded concrete in the inner cavity closely fits the strain gaug...

Embodiment 2

[0054] This embodiment provides a test method for testing the hoop effect of concrete-filled steel tube arch ribs, such as image 3 , including the following steps:

[0055] S1, get the above protective case 1 and the above mount 2:

[0056] (1) Obtain the protective shell 1: the protective shell 1 is made of steel with the same grade as the steel pipe 4 . The protective shell 1 is a hollow cube with only five sides composed of five square steel plates. The thickness of the protective shell 1 is smaller than that of the steel pipe 4. The size of the protective shell 1 can be adjusted according to the size of the strain gauge. based on the space as small as possible. Welding is used to complete the production of the protective shell of the device, and the inner wall of the protective shell is ground to the standard where strain gauges can be pasted before welding.

[0057] (2) Obtain the mounting base 2: 3D printing is used to make the mounting base 2. Compared with the manu...

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Abstract

The invention relates to the technical field of civil engineering, in particular to a testing device and method for testing the hooping effect of a concrete filled steel tube arch rib. A strain gauge is mounted on the inner wall of a protective shell, the protective shell is arranged in a steel pipe and connected with a fixed mounting seat, and the acting force of poured concrete on the strain gauge is integrally transmitted through the protective shell, so that the expansive force of the poured concrete on the steel pipe is tested; and in this way, impact on the strain gauge caused by impact force generated by pumping concrete in actual construction can be effectively avoided, the direct welding mode of the sensor and the inner wall of the steel pipe is also avoided, damage to the strain gauge caused by the heat effect is reduced, and implementation conditions are provided for the testing device to be located in the steel pipe to test parameters in all directions including radial strain / force.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a test device and method for testing the hoop effect of steel pipe concrete arch ribs. Background technique [0002] Concrete filled steel tube utilizes the interaction between the steel tube and concrete in the process of stress, that is, the "hoop effect" of the steel tube on its core concrete, so that the core concrete is under three-dimensional compressive stress, so that the strength of the concrete can be improved. Increased plasticity and toughness are improved. [0003] In order to avoid debonding and voiding between the steel pipe and concrete, and give full play to the "cuff effect" of the steel pipe, those skilled in the art often take effective measures: filling the steel pipe with self-compacting micro-expansion concrete (or self-compacting non-shrinkage concrete ). Through the expansion of the core concrete, the precompressive stress is generated in the ...

Claims

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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/0003G01N2203/0017G01N2203/0048G01N2203/0075G01N2203/0676G01N2203/0682
Inventor 曹璐解威威唐睿楷梁铭翁贻令池浩李威胡雷
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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