CN102359886A - Method for preventing damage to compressed member by unstability of encircling the minor axis in compression test - Google Patents
Method for preventing damage to compressed member by unstability of encircling the minor axis in compression test Download PDFInfo
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- CN102359886A CN102359886A CN2011102115881A CN201110211588A CN102359886A CN 102359886 A CN102359886 A CN 102359886A CN 2011102115881 A CN2011102115881 A CN 2011102115881A CN 201110211588 A CN201110211588 A CN 201110211588A CN 102359886 A CN102359886 A CN 102359886A
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Abstract
The invention relates to a method for preventing damage to a compressed member by unstability of encircling a minor axis in a compression test. A compressed member is comprised, and two centroidal axes orthogonal to each other on the section of the compressed member are divided into a major axis and a minor axis. The method is characterized in that waveform steel plates vertical to the minor axis are arranged at the section centroid of the compressed member, the plate rib direction of the waveform steel plates is parallel to the major axis of the compressed member, and the waveform steel plates are symmetrically arranged at two sides of the minor axis. By using the method, the damage to the compressed member caused by unstability of encircling the minor axis in the compression test can be prevented to ensure that the compressed member is damaged only by encircling the major axis, therefore, it is convenient to research the stress property of the compressed member of encircling the major axis.
Description
Technical field
The present invention relates to a kind of method that in pressurized tests, prevents compression member around weak axle unstable failure.
Background technology
According to the size of member section around different centre of form equatorial moment of inertias, two centre of form axles that can member section is mutually orthogonal are divided into strong axle and weak axle.In the pressurized tests of structural elements, the unstable failure around weak axle takes place in the member of high-fineness ratio under pressure easily; But sometimes in order to study the stress performance of compression member around strong axle; Must avoid compression member that the unstable failure (guaranteeing that promptly compression member only destroys around strong axle) around weak axle takes place; And this is in the conventional test method; Especially under the moment of inertia of strong, the weak axle of member section both direction differs bigger situation, be difficult to realize.
Summary of the invention
In view of the deficiency of prior art, the object of the present invention is to provide a kind of method that in pressurized tests, prevents compression member around weak axle unstable failure, guarantee that compression member only destroys around strong axle in pressurized tests.
To achieve these goals; Technical scheme of the present invention is: a kind of method that in pressurized tests, prevents compression member around weak axle unstable failure; Comprise compression member, two mutually orthogonal centre of form axles are divided into strong axle and weak axle on the cross section of said compression member, and it is characterized in that: the centre of form place, cross section of said compression member is provided with the corrugated sheet steel perpendicular to weak axle; The rib of slab direction of said corrugated sheet steel is parallel to the strong axle of compression member, and said corrugated sheet steel is arranged in the symmetria bilateralis of weak axle.
Further, the length of every side waveform steel plate is all confirmed greater than calculating around the principle of strong equatorial moment of inertia around weak equatorial moment of inertia based on the cross section that is provided with behind the corrugated sheet steel.
Further, every side waveform steel plate is the both sides of the weak axle that is welded on compression member.
The compression member that is provided with behind the corrugated sheet steel of the present invention and since its around the moment of inertia of weak axle greater than moment of inertia around strong axle, therefore can avoid compression member that the unstable failure around weak axle takes place.Meanwhile, because corrugated sheet steel along the axial rigidity very little (not bearing axial compression stress basically) of vertical rib of slab direction, is therefore compared with existing compression member, be provided with the compression member of corrugated sheet steel, its capacity under axial does not have tangible change.
The beneficial effect that the present invention obtains is: the present invention can be under the situation of the capacity under axial that does not change compression member; Improve the moment of inertia of compression member around weak axle; Make compression member that the destruction around strong axle only taken place under pressure, so that the research compression member is around the stress performance of strong axle.
Description of drawings
Fig. 1 is the organigram of one embodiment of the invention.
Fig. 2 is the A-A cross-sectional schematic among Fig. 1.
Fig. 3 is the B-B cross-sectional schematic among Fig. 1.
Among the figure: 1-joist steel, 2-corrugated sheet steel, the strong axle of Ix-, the weak axle of Iy-, centre of form place, 3-cross section.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
With reference to figure 1 ~ 3; Following compression member is example with the joist steel, and a kind of method that in pressurized tests, prevents joist steel around weak axle unstable failure comprises joist steel; Two mutually orthogonal centre of form axles are divided into strong axle and weak axle on the cross section of said joist steel; It is characterized in that: the centre of form place, cross section of said joist steel is provided with the corrugated sheet steel perpendicular to weak axle, and the rib of slab direction of said corrugated sheet steel is parallel to the strong axle of joist steel, and said corrugated sheet steel is arranged in the symmetria bilateralis of weak axle.
In the present embodiment; The length of every side waveform steel plate is all confirmed greater than calculating around the principle of strong equatorial moment of inertia around weak equatorial moment of inertia according to the cross section that is provided with behind the corrugated sheet steel; The two ends flush of the two ends of every side waveform steel plate and joist steel; Its thickness should be less than the thickness of joist steel web, and other concrete parameters can be confirmed by the model of selected corrugated sheet steel; Every side waveform steel plate is the both sides that are welded on the weak axle in joist steel cross section, but is not limited to this.
Please refer to Fig. 1, said joist steel 1 is prone to take place the unstable failure of the weak axle Iy on the cross section under pressure.So; Unstable failure around weak axle Iy takes place for fear of this joist steel; Can be at centre of form place, the cross section of joist steel 13; Be provided with parallel respectively with strong axle Ix along the web both sides of joist steel and with the vertical corrugated sheet steel 2 of weak axle Iy, the rib of slab direction of said corrugated sheet steel 2 is parallel to the strong Ix (like Fig. 2, shown in Figure 3) in joist steel cross section.
In the present embodiment; The joist steel that is provided with corrugated sheet steel can be under the situation of the capacity under axial that does not change joist steel; Improve the moment of inertia of joist steel, make joist steel that the destruction around strong axle Ix only taken place under pressure, so that the research joist steel is around the stress performance of strong axle around weak axle Iy.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. method that in pressurized tests, prevents compression member around weak axle unstable failure; Comprise compression member; Two mutually orthogonal centre of form axles are divided into strong axle and weak axle on the cross section of said compression member; It is characterized in that: the centre of form place, cross section of said compression member is provided with the corrugated sheet steel perpendicular to weak axle, and the rib of slab direction of said corrugated sheet steel is parallel to the strong axle of compression member, and said corrugated sheet steel is arranged in the symmetria bilateralis of weak axle.
2. a kind of method that in pressurized tests, prevents compression member around weak axle unstable failure according to claim 1 is characterized in that: the length of every side waveform steel plate is all confirmed greater than calculating around the principle of strong equatorial moment of inertia around weak equatorial moment of inertia according to the cross section that is provided with behind the corrugated sheet steel.
3. a kind of method that in pressurized tests, prevents compression member around weak axle unstable failure according to claim 1 and 2, it is characterized in that: every side waveform steel plate is the both sides of the weak axle that is welded on compression member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102115881A CN102359886A (en) | 2011-07-27 | 2011-07-27 | Method for preventing damage to compressed member by unstability of encircling the minor axis in compression test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102115881A CN102359886A (en) | 2011-07-27 | 2011-07-27 | Method for preventing damage to compressed member by unstability of encircling the minor axis in compression test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102359886A true CN102359886A (en) | 2012-02-22 |
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ID=45585247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102115881A Pending CN102359886A (en) | 2011-07-27 | 2011-07-27 | Method for preventing damage to compressed member by unstability of encircling the minor axis in compression test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102359886A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426765A (en) * | 2018-03-30 | 2018-08-21 | 西南交通大学 | The fatigue experimental device of steel bridge deck test specimen |
| CN117554169A (en) * | 2023-11-17 | 2024-02-13 | 哈尔滨工业大学 | Fixed end restraint device for plate-shaped member surface external loading test and dismounting method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148527A (en) * | 1965-08-13 | 1969-04-16 | Coal Industry Patents Ltd | Apparatus for determining the hardness of rock |
| JPH075231B2 (en) * | 1989-05-19 | 1995-01-25 | 三菱電機株式会社 | Operation specification setting device for elevator control |
| JP2000065674A (en) * | 1998-08-26 | 2000-03-03 | Japan National Oil Corp | Buckling test method for bar-like body and bar-like test piece-mounting jig |
| JP4075231B2 (en) * | 1999-07-23 | 2008-04-16 | 株式会社島津製作所 | Material testing machine |
-
2011
- 2011-07-27 CN CN2011102115881A patent/CN102359886A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148527A (en) * | 1965-08-13 | 1969-04-16 | Coal Industry Patents Ltd | Apparatus for determining the hardness of rock |
| JPH075231B2 (en) * | 1989-05-19 | 1995-01-25 | 三菱電機株式会社 | Operation specification setting device for elevator control |
| JP2000065674A (en) * | 1998-08-26 | 2000-03-03 | Japan National Oil Corp | Buckling test method for bar-like body and bar-like test piece-mounting jig |
| JP4075231B2 (en) * | 1999-07-23 | 2008-04-16 | 株式会社島津製作所 | Material testing machine |
Non-Patent Citations (2)
| Title |
|---|
| 郭小农等: "铝合金偏心受压构件理论和试验研究", 《建筑结构学报》 * |
| 陈宝春等: "钢管混凝土哑铃形轴压长柱极限承载力研究", 《工程力学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426765A (en) * | 2018-03-30 | 2018-08-21 | 西南交通大学 | The fatigue experimental device of steel bridge deck test specimen |
| CN108426765B (en) * | 2018-03-30 | 2024-04-26 | 西南交通大学 | Fatigue test device for steel bridge deck test piece |
| CN117554169A (en) * | 2023-11-17 | 2024-02-13 | 哈尔滨工业大学 | Fixed end restraint device for plate-shaped member surface external loading test and dismounting method thereof |
| CN117554169B (en) * | 2023-11-17 | 2024-05-28 | 哈尔滨工业大学 | Fixed end restraint device for plate-shaped member surface external loading test and dismounting method thereof |
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Application publication date: 20120222 |