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Scissor type loading positioning device for column and a loading positioning method

A positioning device and scissor-type technology, applied in the field of structural testing, can solve problems such as difficult movement and easy toppling

Inactive Publication Date: 2014-04-09
ZHEJIANG COLLEGE OF CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects in the prior art that it is impossible to quickly align the preset loading position, requires a lot of labor, is difficult to move, and is easy to dump, the problem to be solved by the present invention is to provide a one-time, fast, accurate and stable alignment to any preset loading position. The loading positioning device at the loading position (a line or a point), the loading positioning device can not only move freely horizontally, but also vertically lift freely, which can meet the loading requirements of compression columns of different sizes and structures, which is particularly important The most important thing is that it can ensure that the pressure column remains vertically stable during the positioning process, and avoids the pressure column from toppling during the positioning process.

Method used

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  • Scissor type loading positioning device for column and a loading positioning method
  • Scissor type loading positioning device for column and a loading positioning method
  • Scissor type loading positioning device for column and a loading positioning method

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Embodiment 1: a loading test (see Figure 9 )

[0069](1) A group of 4 reinforced concrete columns, the section size is 200×200mm, the height is 2000mm, and the eccentricity (distance from the load acting position to the axis of the column under compression) is 0 mm, 30 mm, 60 mm, 150 mm, respectively, C30 concrete, the main reinforcement of the column is 4 20, the stirrup is 6150, the protective layer is 15 mm, and the bearing capacity test is carried out on the column. The loading position of the column is the eccentricity, which is respectively: 0 mm (at the axis), 30 mm, 60 mm, and 150 mm.

[0070] (2) Put the column with an eccentricity of 150mm on the positioning auxiliary frame;

[0071] (3) Lifting and vertical lifting system, so that the suspended height of the column placed on it is greater than the height of the cutter support 567, that is, greater than the V-shaped first loading support 562 with a notch and the V-shaped second loading support with a con...

Embodiment 2

[0080] Embodiment 2: secondary loading test (see Figure 10 )

[0081] (1) Carry out residual bearing capacity test on column 51 under the coupled action of load and environment: the cross-sectional size of reinforced concrete column 51 is 125×125mm, the height is 800mm, and the main reinforcement of column 51 is 4 10, the stirrup is 650-100, the protective layer is 15 mm, the length of the protruding column of the flange is 120 mm, the eccentricity 512 is 100 mm, the diameter of the reserved hole 52 is 32 mm, the calculated ultimate bearing capacity of the column 51 is 64kN, and the diameter of the tension bar 53 is 25mm stainless steel thread, backing plate 54 with a diameter of 100mm and a thickness of 120mm, made of steel, and anchor bolts 55 with a diameter of 55mm. Before the remaining bearing capacity test of the column, 40 kN has been applied to the column through the tension bar use load, and place the column 51 in the artificial environment simulation box for 365...

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Abstract

The invention relates to the field of structure tests, and particularly relates to a loading positioning device for a pressed column test in civil engineering, which is particularly suitable for secondary loading of a pressed column under the load-environment coupling effect. The loading positioning device comprises a vertical lifting system consisting of a scissor fork, a fixing hinge, a slide rail, a connecting rod, a drive screw, a handle, a vertical stiffening rib and a baffle, a positioning auxiliary frame and a horizontal moving and fixing system. The loading positioning device can hold the pressed column to any position of a three-dimensional space without manual support while meeting the loading need for the pressed columns of different sizes and structures, and realizes quick and accurate positioning of the pressed column loading, and ensures that the pressed column is always kept vertical and stable in the positioning process.

Description

technical field [0001] The invention relates to the field of structural tests, in particular to a loading positioning device and a loading positioning method for a compression column test in civil engineering, and is particularly suitable for secondary loading of a compression column under the coupled action of load and environment. Background technique [0002] In civil engineering structural tests, static compression loading tests are often carried out on steel columns, reinforced concrete columns and steel tube concrete columns. In order to accurately simulate the constraint conditions at the end of the specimen and ensure the accuracy of the loading position, knife-strand or ball-strand bearings are often used. Since the knife-strand or ball-strand supports are in line or point contact, they are unstable (such as figure 1 Shown), when the test is in place, the column must be supported by someone to ensure that the column is vertical and does not fall over. In the column...

Claims

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Application Information

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IPC IPC(8): G01N3/02
Inventor 李强张科丽王伟
Owner ZHEJIANG COLLEGE OF CONSTR
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