CN106092724B - Concrete temperature stress testing machine with temperature deformation self-compensating function - Google Patents
Concrete temperature stress testing machine with temperature deformation self-compensating function Download PDFInfo
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- CN106092724B CN106092724B CN201610630280.3A CN201610630280A CN106092724B CN 106092724 B CN106092724 B CN 106092724B CN 201610630280 A CN201610630280 A CN 201610630280A CN 106092724 B CN106092724 B CN 106092724B
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- 238000009662 stress testing Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 229910052738 indium Inorganic materials 0.000 claims abstract description 13
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000009628 steelmaking Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 238000004088 simulation Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Ceramic Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of concrete temperature stress testing machines with temperature deformation self-compensating function, belong to the test simulation technical field of concrete temperature stress and deformation, its feed rod uses 4J36 indium steel making, left side fixing end, right side fixing end, fixing end universal joint and mobile terminal universal joint use 4J36 indium steel making, and fixed chuck, active chuck and load transducer use No. 45 steel makings.The present invention is by using different Steel materials for all parts of testing machine, and the pattern length of each component is designed according to a certain percentage, when ambient temperature changes, total temperature deformation difference zero that concrete temperature stress testing machine each section steel parts can be made to generate, to counteract the temperature deformation of the testing machine steel due to caused by ambient temperature variation, the temperature deformation self-compensating of testing machine is realized.
Description
Technical field
The invention belongs to the test simulation technical fields of concrete temperature stress and deformation, in particular to a kind of to have temperature
Deform the concrete temperature stress testing machine of self-compensating function.
Background technique
Mass concrete early stage thermal cracking is an important engineering problem, at present about cracking resistance evaluation index with list
Based on one parameter evaluation, it can not reflect the cracking resistance of concrete comprehensively.Concrete temperature stress testing machine (TSTM) has
It measures simultaneously and plays mould, creep, relax, the function of the multiple materials mechanics parameter such as crack stress and feature breaking temperature, it can be in reality
Room simulation staff cultivation condition is tested, contacting between engineering structure is established.Concrete temperature stress testing machine (TSTM) is a kind of
Effective equipment of overall merit crack-resistant performance of concrete.
There are two main classes about temperature simulation means for concrete temperature stress testing machine (TSTM) at present: one kind is using water
Cold type temperature control template using the temperature in the liquid such as water or oil control concrete four template faces up and down, and then passes through mould
Plate contacts to adjust the temperature change of concrete with concrete；It is to use air-cooled template there are also one kind, it is one small by designing
The closed environment cabinet of type, concrete sample protection in an atmosphere with circulation air, by empty in control cabinet body
The flowing of gas and temperature control adjust the temperature of concrete sample.
But the temperature that current temperature simulation means excessively pay close attention to concrete sample is adjusted, and but ignores testing machine itself
The deformation generated by temperature change.The thermal expansion coefficient of common iron is about 12 × 10-6M/ DEG C, the thermal expansion system of concrete
Number is about 7 × 10-6m/℃.At present in the temperature adjusting method of concrete temperature stress testing machine (TSTM), the light of testing machine
Thick stick part is under room temperature environment, if ambient temperature changes 1 DEG C, the steel of feed rod part will generate temperature and become
Shape, and deflection greatly exceeds the temperature deformation of concrete itself；So the concrete deformation that testing machine measures at present, not
It is generated completely by the temperature change of concrete itself, but since ambient temperature variation causes feed rod part deformation of steel,
And then by displacement transfer to concrete sample.Therefore, current concrete temperature stress testing machine (TSTM) technological means is utilized
The concrete temperature distortion inaccuracy measured is larger, it could even be possible to being wrong.
Summary of the invention
It can offset technical problem to be solved by the invention is to provide one kind and be generated since ambient temperature changes
The concrete temperature stress testing machine with temperature deformation self-compensating function of testing machine stand stretch.
In order to solve the above technical problems, the present invention provides a kind of concrete temperatures with temperature deformation self-compensating function
Pressure tester, comprising:
Machine host is tested, by left side fixing end, right side fixing end and is connected to the left side fixing end and right side fixing end
Between a pair of of feed rod constitute；
Concrete sample mold by fixed chuck, active chuck and is connected between the fixed chuck and active chuck
Side template and bottom template constitute；
The left side fixing end is connect with the fixed chuck by fixing end universal joint, the right side fixing end and activity
Collet is connected by mobile terminal universal joint, and the outside of the right side fixing end connects servo motor, and the servo motor passes through spiral shell
It tethers and connects load transducer, the load transducer is connect by bolt with mobile universal joint；
The feed rod uses thermalexpansioncoefficientα1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel making；
The left side fixing end, right side fixing end, fixing end universal joint and mobile terminal universal joint use thermalexpansioncoefficientα1
It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel making；
The fixed chuck, active chuck and load transducer use thermalexpansioncoefficientα2It is 10~12 × 10-6M/ DEG C
No. 45 steel makings.
Further, the total length L of the feed rod1For 3120mm-3450mm.
Further, the overall length L of the left side fixing end, right side fixing end, fixing end universal joint and mobile terminal universal joint2
For 1190mm~1320mm.
Further, the total length L of the fixed chuck, active chuck and load transducer3For 210mm~300mm.
Concrete temperature stress testing machine provided by the invention with temperature deformation self-compensating function, utilizes 4J36 indium
The steel feature different from No. 45 steel thermal expansion coefficients, by components different in testing machine be respectively adopted 4J36 indium steel and No. 45 steel into
Row manufacture, and all parts are combined according to certain geometric dimension ratio, when ambient temperature variation, concrete temperature
Pressure tester each section steel parts generate total temperature deformation difference be zero, counteract due to ambient temperature variation and
The testing machine stand stretch of generation, thus the shadow that testing machine all parts temperature deformation of having cancelled out each other deforms concrete sample
Ring, thus realize ambient temperature change after, the temperature deformation of concrete temperature stress testing machine steelframe part it is self-complementary
Repay function.In the test of actual concrete temperature stress, influence of the deformation of steel to detected concrete test specimen can be ignored, made
The temperature regulation for obtaining concrete temperature stress testing machine system is more efficient, as a result more accurate.
Detailed description of the invention
Fig. 1 is the concrete temperature stress testing machine provided in an embodiment of the present invention with temperature deformation self-compensating function
Top view；
Fig. 2 is the concrete temperature stress testing machine provided in an embodiment of the present invention with temperature deformation self-compensating function
Cross-sectional view.
Specific embodiment
Referring to Fig. 1, a kind of concrete temperature stress with temperature deformation self-compensating function provided in an embodiment of the present invention
Testing machine, comprising:
Test machine host 1, by left side fixing end 11, right side fixing end 12 and be connected to left side fixing end 11 and right side fix
A pair of of feed rod between end 12 constitutes 13；
Concrete sample mold 2 by fixed chuck 21, active chuck 22 and is connected to fixed chuck 21 and active chuck 22
Between side template 23 and bottom template 24 constitute；
Wherein, left side fixing end 11 is connect with fixed chuck 21 by fixing end universal joint 3, right side fixing end 12 and activity
Collet 22 is connected by mobile terminal universal joint 4, and the outside of right side fixing end 12 is connected with a servo motor 6, and servo motor 6 is logical
It crosses bolt to connect with load transducer 5, load transducer 5 is connect by bolt with mobile universal joint 4.
Wherein, feed rod 13 uses thermalexpansioncoefficientα1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel making；
Left side fixing end 11, right side fixing end 12, fixing end universal joint 3 and mobile terminal universal joint 4 use thermal expansion coefficient
α1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel making；
Fixed chuck 21, active chuck 22 and load transducer 5 use thermalexpansioncoefficientα2It is 10~12 × 10-6M/ DEG C
No. 45 steel makings.
Wherein, the total length L of two feed rods 131For 3120mm-3450mm；Left side fixing end 11, is consolidated right side fixing end 12
The length summation L of this four components of fixed end universal joint 3 and mobile terminal universal joint 42For 1190mm~1320mm；Fixed chuck
21, the length summation L of 5 these three components of active chuck 22 and load transducer3For 210mm~300mm.
When using the concrete temperature stress testing machine provided by the invention with temperature deformation self-compensating function, in coagulation
The concreting region of native test piece mould 2 pours vibrated concrete, is then stepping into the lifting transhipment of temperature stress testing machine
In formula environmental cabinet；Then necessary program needed for setting concrete temperature stress, set environment temperature adjusts course, to concrete
Carry out temperature stress test.
In concrete temperature stress testing machine provided by the invention with temperature deformation self-compensating function, each component difference
It is combined using 4J36 indium steel and No. 45 steel makings, and by certain geometrical length.Wherein, two feed rods 13 are using warm
Coefficient of expansion α1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel, the total length L of two feed rods 131For 3120mm-
3450mm；Left side fixing end 11, right side fixing end 12, fixing end universal joint 3 and mobile terminal universal joint 4 are using thermal expansion
Number α1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel, left side fixing end 11, right side fixing end 12,3 and of fixing end universal joint
The total length L of mobile terminal universal joint 42For 1190mm~1320mm；Fixed chuck 21, active chuck 22 and load transducer 5 are adopted
It is thermalexpansioncoefficientα2It is 10~12 × 10-6/ DEG C No. 45 steel, fixed chuck 21, active chuck 22 and load transducer 5
Total length L3For 210mm~300mm.During concrete temperature stress test, as variation of ambient temperature △ T, feed rod
The temperature deformation that 13 parts generate is △ L1=α1×△T×L1, left side fixing end 11, right side fixing end 12, fixing end universal joint
3 and 4 part of mobile terminal universal joint generate temperature deformation be △ L2=α1×△T×L2, fixed chuck 21,22 and of active chuck
The temperature deformation that 5 part of load transducer generates is △ L3=α2×△T×L3, then final concrete temperature stress testing machine is total
Temperature deformation be △ L1-△L2-△L3=0.
Now for 1 DEG C of variation of ambient temperature, the temperature deformation of concrete temperature stress testing machine is illustrated.When
α1=1.5 × 10-6M/ DEG C, α2=11.59 × 10-6M/ DEG C, work as L1=3270mm, L2=1258.8mm, L3When=257.2mm, then
The temperature deformation that 13 part of feed rod generates are as follows:
ΔL1=α1×ΔT×L1=1.5 × 10-6×1×3270×10-3=4.905；Left side fixing end 11, right side are solid
The temperature deformation that fixed end 12, fixing end universal joint 3 and 4 part of mobile terminal universal joint generate are as follows:
ΔL2=α1×ΔT×L2=1.5 × 10-6×1×1258.8×10-3=1.882；Fixed chuck 21, activity folder
First 22 and 5 part of load transducer generate temperature deformation are as follows:
ΔL3=α2×ΔT×L3=11.59 × 10-6×1×260.8×10-3=3.023；
It follows that total temperature deformation difference that each steel parts of concrete temperature stress testing machine generate is 4.905-
1.882-3.023=0 μm.Therefore, total temperature deformation that concrete temperature stress testing machine each section component finally generates is poor
It is zero, so that ambient temperature is changed generated influence of the deformation of steel to concrete sample can be neglected, to reach temperature
Degree deforms self-compensating purpose.
A kind of concrete temperature stress testing machine with temperature deformation self-compensating function provided in an embodiment of the present invention, will
The all parts of the concrete temperature stress testing machine Steel material different using thermal expansion coefficient, and design is each according to a certain percentage
The pattern length of component, when ambient temperature changes, what concrete temperature stress testing machine each section steel parts generated
Total temperature deformation difference is zero, so that the temperature deformation of the testing machine steel due to caused by ambient temperature variation is counteracted, it is real
The purpose of its temperature deformation self-compensating is showed.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (1)
1. a kind of concrete temperature stress testing machine with temperature deformation self-compensating function characterized by comprising
Machine host is tested, by left side fixing end, right side fixing end and is connected between the left side fixing end and right side fixing end
A pair of of feed rod constitute；
Concrete sample mold, by fixed chuck, active chuck and the side being connected between the fixed chuck and active chuck
Portion's template and bottom template are constituted；
The left side fixing end is connect with the fixed chuck by fixing end universal joint, the right side fixing end and active chuck
It is connected by mobile terminal universal joint, the outside of the right side fixing end connects servo motor, and the servo motor is connected by bolt
Load transducer is connect, the load transducer is connect by bolt with mobile universal joint；
The feed rod uses thermalexpansioncoefficientα1It is 0.5~2.5 × 10-6M/ DEG C of 4J36 indium steel making；Two feed rods 13
Total length L1For 3120mm-3450mm；
The left side fixing end, right side fixing end, fixing end universal joint and mobile terminal universal joint use thermalexpansioncoefficientα1It is 0.5
~2.5 × 10-6M/ DEG C of 4J36 indium steel making；The left side fixing end, right side fixing end, fixing end universal joint and mobile terminal
The total length L of universal joint2For 1190mm~1320mm；
The fixed chuck, active chuck and load transducer use thermalexpansioncoefficientα2It is 10~12 × 10-6No. 45 of m/ DEG C
Steel making；The total length L of the fixed chuck, active chuck and load transducer3For 210mm~300m；
During concrete temperature stress test, as variation of ambient temperature △ T, the temperature deformation of the feed rod part generation
For △ L1=α1×△T×L1, the left side fixing end, right side fixing end, fixing end universal joint and mobile terminal universal joint part produce
Raw temperature deformation is △ L2=α1×△T×L2, the temperature of the fixed chuck, active chuck and the generation of load transducer part
Degree is deformed into △ L3=α2×△T×L3, then the total temperature deformation of final concrete temperature stress testing machine is △ L1-△L2-△
L3=0.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630280.3A CN106092724B (en) | 2016-08-04 | 2016-08-04 | Concrete temperature stress testing machine with temperature deformation self-compensating function |
| US15/404,338 US9891208B2 (en) | 2016-07-08 | 2017-01-12 | Concrete temperature stress testing machine system and concrete temperature stress testing method |
| US15/855,526 US10060901B2 (en) | 2016-07-08 | 2017-12-27 | Concrete temperature stress testing machine system and temperature deformation self-compensation method |
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| CN201610630280.3A CN106092724B (en) | 2016-08-04 | 2016-08-04 | Concrete temperature stress testing machine with temperature deformation self-compensating function |
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| CN106092724B true CN106092724B (en) | 2019-01-22 |
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| CN106771097A (en) * | 2016-12-16 | 2017-05-31 | 中国建筑材料科学研究总院 | Concrete shrinkage and drying shrinkage pressure tester and test method |
| CN107843555B (en) * | 2017-12-20 | 2023-11-07 | 清华大学 | Method and device for detecting true bonding strength of transverse seam of arch dam |
| CN108692834B (en) * | 2018-06-11 | 2020-01-21 | 河海大学 | Be used for verifying concrete stress test device under internal load effect |
| CN109709313A (en) * | 2019-02-11 | 2019-05-03 | 河海大学 | A kind of new concrete restrained shrinkage experimental rig and application method |
| CN113138614B (en) * | 2021-04-02 | 2022-02-25 | 华电西藏能源有限公司大古水电分公司 | Method for keeping constant environmental temperature of concrete constraint stress equipment |
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