CN109696351A - It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo - Google Patents
It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo Download PDFInfo
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- CN109696351A CN109696351A CN201910052520.XA CN201910052520A CN109696351A CN 109696351 A CN109696351 A CN 109696351A CN 201910052520 A CN201910052520 A CN 201910052520A CN 109696351 A CN109696351 A CN 109696351A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The present invention relates to a kind of long-term tensile load test devices of recombination composite construction bamboo, belong to green bamboo building material technical field.Supporting element, test block, loaded member and balanced lever are attached respectively by bolt, the long-term tensile property of recombination composite construction bamboo is tested using lever-loading principle；In the long-term tensile property of test recombination composite construction bamboo, the corresponding resistance arm of test block is that loaded member corresponds to the 1/10~1/8 of power arm；Balanced lever is made by channel steel, supporting element is made of U-shaped connector and I-steel, test block is made of short hook, upper lift ring, rift grain tension recombination composite construction bamboo test specimen, lower lift ring, flower basket bolt, U-shaped connector and lower part I-steel, and loaded member is made of long hook, metal bucket and weights.Test device of the present invention can accurately and efficiently test the long-term tensile load performance of recombination composite construction bamboo, provide basic data for application and popularization of the recombination composite construction bamboo in building structure and support.
Description
Technical field
The present invention relates to a kind of for recombinating the long-term tensile load test device of composite construction bamboo, belongs to that green is bamboo to build
Material technical field.
Background technique
Recombinating composite construction bamboo is a kind of novel bamboo composite material, industrializes field in green building material and green building
In have broad application prospects.Currently, due to similar to timber, recombination composite construction bamboo as a kind of biological material,
Also can be there is a phenomenon where creep and strength reduction under long-duration load, therefore recombinate the long-duration load performance evaluation of composite construction bamboo
It is its basic premise for being applied to building structure.But due to the research and correlation for lacking recombination composite construction bamboo long-duration load performance
Test device causes recombination composite construction bamboo to be still mainly used in the non-structural application neck such as floor, furniture, container floor at present
In domain, recombination composite construction bamboo value-added content of product is low.The long-term tensile load test device of composite construction bamboo is recombinated by exploitation,
The long-term tensile mechanical performance of evaluation recombination composite construction bamboo answers propulsion recombination composite construction bamboo in building structure field
With having a very important significance.Through related document and data-searching, such as building structure journal the 9th phase 110~120 of volume 38
" steel-bamboo interface stick performance analysis after action of long-term load " of page, the annual phase the 46th of volume 27 the 3rd of forestry science and technology exploitation the 2013rd
" the short-term creep behaviour of the stretching of bamboo wood and simulation ", Forestry Engineering journal the 3rd phase the 82nd~86 of volume 28 in 2014 of page~49
" determination of bamboo wood creep stress index ", Forestry Engineering journal the 3rd phase " Recombined bamboo of page 33~37 of volume 2 in 2017 of page
Short-term bending resistance creep properties and its Study on Microstructure ".From the above and in document, similar assessment technology is not found
Content.
Summary of the invention
The purpose of the present invention is to propose to a kind of for recombinating the long-term tensile load test device of composite construction bamboo, to promote
Transformation of the composite construction bamboo from the non-structural application field such as floor, furniture, container floor to building structure application field is recombinated,
The accurately and efficiently evaluation structure long-term tensile load performance of recombination composite construction bamboo, is building for recombination composite construction bamboo
Application and popularization in structure provide reliable data and support.
It is proposed by the present invention for recombinating the long-term tensile load test device of composite construction bamboo, including balanced lever, on
Portion's supporting element, lower support, part to be measured and loaded member；The balanced lever is supported on upper support element by supporting point
On, the part to be measured and loaded member are separately fixed at the both ends of balanced lever, and part to be measured includes upper attachment, tension to be measured
The upper end of test specimen and Hua Lan bolt, the tensile test piece to be measured is opposite with one end of balanced lever solid by upper attachment
Fixed, by spending blue bolt and lower support relatively fixed, lower support is fixed on the ground for the lower end of tensile test piece to be measured,
The upper support element and lower support is on same vertical line.
The long-term tensile load test device proposed by the present invention for being used to recombinate composite construction bamboo, its advantage is that:
Test device of the present invention tests the tension long-term behaviour of recombination composite construction bamboo using lever-loading principle.Its
In balanced lever, supporting element, test block and loaded member directly made by fashioned iron mostly, therefore recombinate composite construction bamboo resist for a long time
Draw the manufacturing cost of load test device low；Test device of the present invention can be disposable by weights when applying long-duration load
Apply, and the corresponding resistance arm of test block is that loaded member corresponds to the 1/10~1/8 of power arm, therefore weights quality is few, existing
Field test operation is easy and quick.Test device of the present invention can accurately and efficiently test the long-term anti-of recombination composite construction bamboo
Load performance is drawn, basic data is provided for application and popularization of the recombination composite construction bamboo in building structure and supports.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the recombination long-term tensile load test device of composite construction bamboo proposed by the present invention.
In Fig. 1,1 is balanced lever, and 2 be upper attachment, and 3 be tensile test piece to be measured, and 4 be to spend blue bolt, and 5 be lower part branch
Support member, 6 be upper support element, and 7 be loaded member, and 8 be supporting point.
Specific embodiment
It is proposed by the present invention for recombinating the long-term tensile load test device of composite construction bamboo, structure as shown in Figure 1,
Including balanced lever 1, upper support element 6, lower support 5, part to be measured and loaded member 7.Balanced lever 1 passes through supporting point 8
In upper support element 6, part to be measured and loaded member 7 are separately fixed at the both ends of balanced lever 1 for support, and part to be measured includes top connection
The upper end of part 2, tensile test piece to be measured 3 and Hua Lan bolt 4, tensile test piece 3 to be measured passes through upper attachment 2 and balanced lever 1
One end is relatively fixed, and the lower end of tensile test piece 3 to be measured is by spending blue bolt 4 and lower support 5 relatively fixed, lower support
5 fix on the ground, and upper support element 6 and lower support 5 are on same vertical line.
In above-mentioned long-term tensile load test device, it is fixed on the part to be measured and balance balance pivot 8 of 1 one end of balanced lever
The distance between the ratio between L1 and the distance between the loaded member that is fixed on 1 other end of balanced lever and balance balance pivot 8 L2 be
1/10~1/8.
One embodiment of the test device of the present invention recombination long-term tensile load of composite construction bamboo introduced below:
The test device for recombinating the long-term tensile load of composite construction bamboo includes balanced lever 1, upper support element 6, lower part branch
Support member 5, part to be measured and loaded member 7.In one embodiment of test device of the present invention, balanced lever 1 by 14a model channel steel system
Make, balanced lever 1 is supported in upper support element 6 by supporting point 8, and supporting way connects bolt material using the bolt of M18
Grade is 8.8 grades.Part to be measured and loaded member 7 are separately fixed at the both ends of balanced lever 1, part to be measured include upper attachment 2, to
Survey tensile test piece 3 and Hua Lan bolt 4.Upper attachment 2 is by round and smooth reinforcement fabrication, bar diameter 18mm, steel type
Q235, upper attachment 2 use the bolt of M18 to connect bolt material grade as 8.8 grades with balanced lever 1.Tensile test piece to be measured
3 recombinate composite construction bamboo test specimen for rift grain tension, test specimen with a thickness of 20mm, test piece end width is 50mm, at test specimen center
Width is 5mm, density 1.1g/cm3.Spend blue 4 model M20 of bolt.The upper end of tensile test piece 3 to be measured passes through upper attachment
2 is relatively fixed with one end of balanced lever 1, and the lower end of tensile test piece 3 to be measured is by spending blue bolt 4 and lower support 5 opposite
Fixed, lower support 5 fixes on the ground, and upper support element 6 and lower support 5 are on same vertical line.Upper support
Part 6 and lower support 5 are made of U-shaped connector and lower part I-steel.U-shaped connector and I-steel use the bolt of M18
Connection, bolt material grade are 8.8 grades, and U-shaped connector is the Q235 steel of 12mm thickness, I-steel selection standard model with material
25a.Loaded member 7 is made of long hook, metal bucket and weights.Long hook is by round and smooth reinforcement fabrication, bar diameter 18mm, steel
Material model Q235；Long hook connect metal bucket using the bolt of M18 with balanced lever 1 and directly hangs on long hook, weights
It is directly installed in inside metal bucket, the weight for round iron block, single circle iron block is 0.1~0.4kg.It is fixed on balanced lever 1 one
The distance between the part to be measured and balance balance pivot 8 at end L1 and the loaded member 7 and balance bar for being fixed on 1 other end of balanced lever
The ratio between the distance between bar fulcrum 8 L2 is 1/10.
Claims (2)
1. a kind of for recombinating the long-term tensile load test device of composite construction bamboo, it is characterised in that the long-term tensile load is surveyed
Trial assembly is set including balanced lever, upper support element, lower support, part to be measured and loaded member；The balanced lever passes through branch
Support point is supported in upper support element, and the part to be measured and loaded member are separately fixed at the both ends of balanced lever, part packet to be measured
Include upper attachment, tensile test piece to be measured and Hua Lan bolt, the upper end of the tensile test piece to be measured by upper attachment with
One end of balanced lever is relatively fixed, the lower end of tensile test piece to be measured by spending blue bolt and lower support relatively fixed, under
Portion's supporting element fixes on the ground, and the upper support element and lower support are on same vertical line.
2. long-term tensile load test device as described in claim 1, it is characterised in that be fixed on balance bar described in wherein
The distance between the part to be measured and balance balance pivot of bar one end L1 and the loaded member and balance for being fixed on the balanced lever other end
The ratio between the distance between balance pivot L2 is 1/10~1/8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052520.XA CN109696351A (en) | 2019-01-21 | 2019-01-21 | It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo |
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| CN201910052520.XA CN109696351A (en) | 2019-01-21 | 2019-01-21 | It is a kind of for recombinating the long-term tensile load test device of composite construction bamboo |
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| CN109696351A true CN109696351A (en) | 2019-04-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218758A (en) * | 2021-05-07 | 2021-08-06 | 河南华正工程试验检测有限责任公司 | Device and method for detecting releasing force of steel bar insulation clamp |
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| CN113218758B (en) * | 2021-05-07 | 2024-02-23 | 河南华正工程试验检测有限责任公司 | Device and method for detecting clamping force of insulating clamping and releasing of reinforcing steel bars |
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