CN106092724A - There is the concrete temperature stress testing machine of temperature deformation self-compensating function - Google Patents
There is the concrete temperature stress testing machine of temperature deformation self-compensating function Download PDFInfo
- Publication number
- CN106092724A CN106092724A CN201610630280.3A CN201610630280A CN106092724A CN 106092724 A CN106092724 A CN 106092724A CN 201610630280 A CN201610630280 A CN 201610630280A CN 106092724 A CN106092724 A CN 106092724A
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- testing machine
- temperature
- concrete
- fixing end
- universal joint
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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
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- 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; ceramics; glass; bricks
- G01N33/383—Concrete, cement
Abstract
The invention discloses a kind of concrete temperature stress testing machine 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, the fixing end in left side, the fixing end in right side, fixing end universal joint and mobile terminal universal joint use 4J36 indium steel making, fixed chuck, active chuck and load transducer to use No. 45 steel makings.The present invention is by using different Steel materials by all parts of testing machine, and design the pattern length of each parts according to a certain percentage, when ambient temperature changes, total temperature deformation difference that concrete temperature stress testing machine each several part steel parts can be made to produce is zero, thus counteract the temperature deformation of the testing machine steel caused due to ambient temperature change, it is achieved that the temperature deformation self-compensating of testing machine.
Description
Technical field
The invention belongs to the test simulation technical field of concrete temperature stress and deformation, particularly to one, there is temperature
The concrete temperature stress testing machine of deformation self-compensating function.
Background technology
Mass concrete thermal cracking in early days is an important engineering problem, at present about cracking resistance evaluation index with list
One parameter evaluation is main, can not reflect the cracking resistance of concrete comprehensively.Concrete temperature stress testing machine (TSTM) has
Measure simultaneously play mould, creep, relax, the function of the multiple material mechanics parameter such as crack stress and feature breaking temperature, can be in reality
Test room simulation staff cultivation condition, set up contacting between engineering structure.Concrete temperature stress testing machine (TSTM) is a kind of
Effective equipment of overall merit crack-resistant performance of concrete.
Concrete temperature stress testing machine (TSTM) mainly has two classes about temperature simulation means at present: a class is to use water
Cold type temperature control template, utilizes the liquid such as water or oil to control the temperature in concrete four template faces up and down, and then passes through mould
Plate contacts the variations in temperature regulating concrete with concrete；Also having a class is to use air-cooled template, little by design one
The environment casing that type is closed, concrete sample protection in an atmosphere with circulation air, by empty in control chamber body
The flowing of gas and temperature control regulate the temperature of concrete sample.
But current temperature simulation means excessively pay close attention to the temperature regulation of concrete sample, but ignore testing machine itself
The deformation produced by variations in temperature.The thermal coefficient of expansion 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, then the steel of feed rod part will produce temperature and become
Shape, and deflection greatly exceed the temperature deformation of concrete itself；So the concrete deformation that testing machine records at present, not
Produced by the variations in temperature of concrete itself completely, but owing to ambient temperature change 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 recorded is relatively big, it could even be possible to be wrong.
Summary of the invention
The technical problem to be solved be to provide one can offset due to ambient temperature change and produce
The concrete temperature stress testing machine with temperature deformation self-compensating function of testing machine stand stretch.
For solving above-mentioned technical problem, the invention provides a kind of concrete temperature with temperature deformation self-compensating function
Pressure tester, including:
Testing machine main frame, by the fixing end in left side, the fixing end in right side and be connected to the fixing end of the fixing end in described left side and right side
Between a pair feed rod constitute；
Concrete sample mould, by fixed chuck, active chuck and be connected between described fixed chuck and active chuck
Side template and bottom template constitute；
The fixing end in described left side is connected by fixing end universal joint with described fixed chuck, and the fixing end in described right side is with movable
Chuck is connected by mobile terminal universal joint, and described right side is fixed the outside of end and connected servomotor, and described servomotor passes through spiral shell
Tethering and connect load transducer, described load transducer is connected with mobile universal joint by bolt；
Described feed rod uses thermalexpansioncoefficientα1It is 0.5～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
The fixing end in described left side, the fixing end in right side, fixing end universal joint and mobile terminal universal joint use thermalexpansioncoefficientα1
It is 0.5～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
Described 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 described feed rod1For 3120mm-3450mm.
Further, end is fixed in described left side, end is fixed on right side, fix end universal joint and overall length L of mobile terminal universal joint2
For 1190mm～1320mm.
Further, the total length L of described fixed chuck, active chuck and load transducer3For 210mm～300mm.
The concrete temperature stress testing machine with temperature deformation self-compensating function that the present invention provides, utilizes 4J36 indium
Parts different in testing machine are respectively adopted 4J36 indium steel and No. 45 steel enter by steel and the different feature of No. 45 steel thermal coefficient of expansions
Row manufactures, and is combined according to certain physical dimension ratio by all parts, when ambient temperature changes, and concrete temperature
Total temperature deformation difference that pressure tester each several part steel parts produces is zero, counteracts due to ambient temperature change
The testing machine stand stretch produced, thus the shadow that concrete sample is deformed by testing machine all parts temperature deformation of having cancelled out each other
Ring, it is achieved thereby that after ambient temperature changes, the temperature deformation of concrete temperature stress testing machine steelframe part self-complementary
Repay function.In actual concrete temperature stress test, the deformation of steel impact on detected concrete test specimen can be ignored, make
The temperature adjusting obtaining concrete temperature stress testing machine system is in hgher efficiency, and result is more accurate.
Accompanying drawing explanation
The concrete temperature stress testing machine with temperature deformation self-compensating function that Fig. 1 provides for the embodiment of the present invention
Top view；
The concrete temperature stress testing machine with temperature deformation self-compensating function that Fig. 2 provides for the embodiment of the present invention
Sectional view.
Detailed description of the invention
See Fig. 1, a kind of concrete temperature stress with temperature deformation self-compensating function that the embodiment of the present invention provides
Testing machine, including:
Testing machine main frame 1, is fixed end 11, the fixing end 12 in right side by left side and is connected to the fixing end 11 in left side and right side is fixed
A pair feed rod between end 12 constitutes 13；
Concrete sample mould 2, by fixed chuck 21, active chuck 22 and be connected to fixed chuck 21 and active chuck 22
Between side template 23 and bottom template 24 constitute；
Wherein, the fixing end 11 in left side is connected by fixing end universal joint 3 with fixed chuck 21, and the fixing end 12 in right side is with movable
Chuck 22 is connected by mobile terminal universal joint 4, and the outside connection of end 12 is fixed on right side has a servomotor 6, servomotor 6 to lead to
Crossing bolt to be connected with load transducer 5, load transducer 5 is connected with mobile universal joint 4 by bolt.
Wherein, feed rod 13 uses thermalexpansioncoefficientα1It is 0.5～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
The fixing end 11 in left side, right side are fixed end 12, fixing end universal joint 3 and mobile terminal universal joint 4 and are used thermal coefficient of expansion
α1It is 0.5～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
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；End 11 is fixed in left side, end 12 is fixed on right side, admittedly
Length summation L of these four parts of fixed end universal joint 3 and mobile terminal universal joint 42For 1190mm～1320mm；Fixed chuck
21, active chuck 22 and load transducer 5 these three parts length summation L3For 210mm～300mm.
When using the concrete temperature stress testing machine with temperature deformation self-compensating function that the present invention provides, at coagulation
The concreting region of soil test piece mould 2 pours vibrated concrete, then the lifting transhipment of temperature stress testing machine is being stepped into
In formula environmental cabinet；Then setting the necessary program needed for concrete temperature stress, set environment temperature regulation course, to concrete
Carry out temperature stress test.
In the concrete temperature stress testing machine with temperature deformation self-compensating function that the present invention provides, each parts are respectively
Use 4J36 indium steel and No. 45 steel makings, and be combined by certain geometrical length.Wherein, two feed rods 13 use heat
Coefficient of expansion α1It is 0.5～2.5 × 10-6The 4J36 indium steel of m/ DEG C, the total length L of two feed rods 131For 3120mm-
3450mm；The fixing end 11 in left side, right side are fixed end 12, fixing end universal joint 3 and mobile terminal universal joint 4 and are used thermal expansion system
Number α1It is 0.5～2.5 × 10-6The 4J36 indium steel of m/ DEG C, end 11 is fixed in left side, end 12 is fixed on right side, fixing end universal joint 3 and
The total length L of mobile terminal universal joint 42For 1190mm～1320mm；Fixed chuck 21, active chuck 22 and load transducer 5 are adopted
Be 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.In concrete temperature stress process of the test, as variation of ambient temperature △ T, feed rod
The temperature deformation that 13 parts produce is △ L1=α1×△T×L1, end 11 is fixed in left side, end 12 is fixed on right side, fixing end universal joint
3 and mobile terminal universal joint 4 part produce temperature deformation be △ L2=α1×△T×L2, fixed chuck 21, active chuck 22 and
The temperature deformation that load transducer 5 part produces is △ L3=α2×△T×L3, then final concrete temperature stress testing machine is total
Temperature deformation be △ L1-△L2-△L3=0.
Now as a example by variation of ambient temperature 1 DEG C, the temperature deformation to concrete temperature stress testing machine illustrates.When
α1=1.5 × 10-6M/ DEG C, α2=11.59 × 10-6M/ DEG C, work as L1=3270mm, L2=1258.8mm, L3During=257.2mm, then
The temperature deformation that feed rod 13 part produces is:
ΔL1=α1×ΔT×L1=1.5 × 10-6×1×3270×10-3=4.905；The fixing end 11 in left side, right side are solid
The temperature deformation that fixed end 12, fixing end universal joint 3 and mobile terminal universal joint 4 part produce is:
ΔL2=α1×ΔT×L2=1.5 × 10-6×1×1258.8×10-3=1.882；Fixed chuck 21, movable folder
22 and the temperature deformation that produces of load transducer 5 part be:
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 produces is 4.905-
1.882-3.023=0 μm.Therefore, the total temperature deformation that concrete temperature stress testing machine each several part parts finally produce is poor
It is zero, makes the produced deformation of steel of ambient temperature change negligible on the impact of concrete sample, thus reached temperature
Degree deforms self-compensating purpose.
A kind of concrete temperature stress testing machine with temperature deformation self-compensating function that the embodiment of the present invention provides, will
The all parts of concrete temperature stress testing machine uses the Steel material that thermal coefficient of expansion is different, and design is each according to a certain percentage
The pattern length of parts, when ambient temperature changes, concrete temperature stress testing machine each several part steel parts produces
Total temperature deformation difference is zero, thus counteracts the temperature deformation of the testing machine steel caused due to ambient temperature change, real
Show the purpose of its temperature deformation self-compensating.
It should be noted last that, above detailed description of the invention only in order to technical scheme to be described and unrestricted,
Although the present invention being described in detail with reference to example, it will be understood by those within the art that, can be to the present invention
Technical scheme modify or equivalent, without deviating from the spirit and scope of technical solution of the present invention, it all should be contained
In the middle of scope of the presently claimed invention.
Claims (4)
1. a concrete temperature stress testing machine with temperature deformation self-compensating function, it is characterised in that including:
Testing machine main frame, by the fixing end in left side, the fixing end in right side and be connected between the fixing end in described left side end fixing with right side
A pair feed rod constitute；
Concrete sample mould, by fixed chuck, active chuck and be connected to the side between described fixed chuck and active chuck
Portion's template and bottom template are constituted；
The fixing end in described left side is connected by fixing end universal joint with described fixed chuck, the fixing end in described right side and active chuck
Being connected by mobile terminal universal joint, described right side is fixed the outside of end and is connected servomotor, and described servomotor is by bolt even
Connecing load transducer, described load transducer is connected with mobile universal joint by bolt；
Described feed rod uses thermalexpansioncoefficientα1It is 0.5～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
The fixing end in described left side, the fixing end in right side, fixing end universal joint and mobile terminal universal joint use thermalexpansioncoefficientα1It is 0.5
～2.5 × 10-6The 4J36 indium steel making of m/ DEG C；
Described fixed chuck, active chuck and load transducer use thermalexpansioncoefficientα2It is 10～12 × 10-6No. 45 of m/ DEG C
Steel making.
The concrete temperature stress testing machine with temperature deformation self-compensating function the most according to claim 1, its feature
It is:
The total length L of described feed rod1For 3120mm-3450mm.
The concrete temperature stress testing machine with temperature deformation self-compensating function the most according to claim 1, its feature
It is:
End is fixed in described left side, end is fixed on right side, fix end universal joint and the total length L of mobile terminal universal joint2For 1190mm～
1320mm。
The concrete temperature stress testing machine with temperature deformation self-compensating function the most according to claim 1, its feature
It is:
The total length L of described fixed chuck, active chuck and load transducer3For 210mm～300mm.
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 |
Applications Claiming Priority (1)
| 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 |
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| Publication Number | Publication Date |
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| CN106092724A true CN106092724A (en) | 2016-11-09 |
| CN106092724B CN106092724B (en) | 2019-01-22 |
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Cited By (5)
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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 |
| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
| CN108692834A (en) * | 2018-06-11 | 2018-10-23 | 河海大学 | One kind is for verifying the lower concrete stress experimental rig of internal loading 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 |
| CN113138614A (en) * | 2021-04-02 | 2021-07-20 | 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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| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
| 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 |
| CN108692834A (en) * | 2018-06-11 | 2018-10-23 | 河海大学 | One kind is for verifying the lower concrete stress experimental rig of internal loading 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 |
| CN113138614A (en) * | 2021-04-02 | 2021-07-20 | 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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