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Hydraulic-based concrete-filled steel tube hooping effect testing device

A technology for concrete filled steel tubes and testing devices, which is applied to measuring devices, force/torque/work measuring instruments, instruments, etc., can solve problems such as large measurement errors, and achieve difficult installation, small scouring area, economical and practical effects

Active Publication Date: 2021-10-26
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 provide a hydraulic-based steel pipe concrete The hoop action test device uses hydraulic pressure to measure the hoop action of concrete filled steel tubes directly, avoiding intermediate conversions, and improving the accuracy and intuitiveness of test results

Method used

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  • Hydraulic-based concrete-filled steel tube hooping effect testing device
  • Hydraulic-based concrete-filled steel tube hooping effect testing device
  • Hydraulic-based concrete-filled steel tube hooping effect testing device

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A hydraulic-based test device for the hoop action of concrete filled steel tubes, such as figure 1 , figure 2 , Figure 4 , including a hydraulic pressure sensor 2 and a storage unit 3 for containing liquid (such as water, suspension mixed with different substances, emulsion, colloid, etc.) or gas (such as air, etc.), and the storage unit 3 is set on the steel pipe 1 On the inner wall (for example, by bonding or through the intermediate card seat limit connection, etc.), the outlet on the storage part 3 is in sealing connection with the interface of the hydraulic sensor 2 . In this embodiment, the outer diameter of the steel pipe 1 is 325mm and the thickness is 6mm.

[0034] Wherein, the installation direction of the storage part 3 on the inner wall is not limited to the axial and circumferential direction of the steel pipe, and can also be arranged obliquely. Preferably, under the premise that the storage part 3 has a large enough hole diameter to be suitable for c...

Embodiment 2

[0040] As a specific implementation, such as figure 2 , image 3 , the storage part 3 in the above-mentioned embodiment 1 includes two connected side surfaces, and a top surface and a bottom surface connecting the two sides, wherein an opening 31 is provided on the top surface, and the opening 31 is used to adapt to the interface of the hydraulic pressure sensor 2 connect. Further, the storage part 3 is preferably designed in the shape of a tile, about the size of a palm, about 8 cm long, and about 5 cm wide; the opening 31 is set toward the axial direction of the steel pipe 1, and both sides are arc surfaces—A side and B side surface, wherein the curvature of the arc surface near the steel pipe 1 side is consistent with the curvature of the inner wall arc surface of the steel pipe 1 (in this embodiment, the A surface is designed as an arc surface with the same radius as the inner wall of the steel pipe 1, and the B surface is slightly larger than the inner wall radius of th...

Embodiment 3

[0043] As a specific implementation, such as Figure 4 , Figure 5 , the storage part 3 in the above-mentioned embodiment 1 is a pipeline structure with one end sealed and the other end matched with the hydraulic sensor 2, wherein the cross-sectional form of the pipeline structure is not limited to a circle, and can also be ellipse, triangle, rectangle, trapezoid Equivalent geometric shapes; the interior of the storage part 3 is filled with liquid. The pipe is located on the inner wall of the steel pipe 1 and arranged in an S-shaped continuous bend along the circumferential direction. Specifically, the pipe continuously bent includes several vertical parts and corresponding curved parts connecting adjacent vertical parts. The vertical parts are arranged along the axial direction of the steel pipe 1. , the pipe extends and bends toward the steel pipe 1 circumferentially, ensuring that the pipe and the inner wall of the steel pipe 1 have a large contact surface for a firm conne...

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Abstract

The invention relates to the technical field of civil engineering, in particular to a hydraulic-based concrete-filled steel tube hooping effect testing device which comprises a hydraulic sensor and a storage part used for containing liquid or gas, the storage part is used for being arranged on the inner wall of a steel tube, and the storage part is in sealed connection with the hydraulic sensor; and according to the invention, the hydraulic sensor is utilized to transmit the expansion stress of the expansive concrete poured in the steel pipe to the pressure of the storage part to directly measure so as to obtain the hoop force of the steel pipe to the expansive concrete in the pipe, thereby avoiding the intermediate conversion process required after the strain of the steel pipe is measured, reducing the introduction of errors, and greatly improving the accuracy and intuition of a test result.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a hydraulic-based test device for the hoop effect of steel pipe concrete. 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. 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 concrete, and the pret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00
CPCG01L5/0028
Inventor 曹璐侯明川周筱航解威威唐睿楷
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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