CN106093358A - Can directly measure concrete temperature stress testing machine and the method for concrete deformation - Google Patents
Can directly measure concrete temperature stress testing machine and the method for concrete deformation Download PDFInfo
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- CN106093358A CN106093358A CN201610539510.5A CN201610539510A CN106093358A CN 106093358 A CN106093358 A CN 106093358A CN 201610539510 A CN201610539510 A CN 201610539510A CN 106093358 A CN106093358 A CN 106093358A
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- 238000009662 stress testing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title description 7
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000010998 test method Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 14
- 230000033228 biological regulation Effects 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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Abstract
The invention discloses a kind of concrete temperature stress testing machine that can directly measure concrete deformation and test method, testing machine includes: body, and body is provided with multiple mobilizable template, and the cooperation of multiple templates limits the die cavity being suitable to place concrete block；Upper deformation measuring system, upper deformation measuring system includes: two upper pre-buried bars, and two upper pre-buried bars are positioned at above die cavity, and the lower end of two upper pre-buried bars is respectively equipped with the built-in fitting being adapted to extend in concrete block；Upper sensor, upper sensor is located at the top of pre-buried bar on one of them；On extend bar, the one end of bar of extending is connected with upper sensor, and the other end of bar of above extending bar pre-buried with in other in which is connected.Concrete temperature stress testing machine according to embodiments of the present invention, can directly measure the deformation of concrete, and measurement precision is high.
Description
Technical field
The invention belongs to building field, relate to the deformation measurement technology of a kind of concrete temperature stress testing machine, more specifically
Ground, relates to a kind of concrete temperature stress testing machine that can directly measure concrete deformation and uses the test side of this testing machine
Method.
Background technology
Concrete temperature stress testing machine (TSTM) have can under laboratory simulation difference degree of restraint the temperature of concrete
Degree stress and the function of deformation, ring cracking resistance evaluation, the structure mechanics of materials under temperature stress and constraints of material
Should be a kind of effective laboratory facilities.The test piece mould two ends of concrete temperature stress testing machine have two chucks, Qi Zhongyi
End is fixed chuck, and one end is movable chuck.Under the working condition of simulation staff cultivation, when active chuck contraction or expansion one
During individual micro-displacement, motor controls active chuck and is returned to initial position.The critical displacement value adjusting active chuck determines about
The analog case of Shu Chengdu, so the certainty of measurement of concrete deformation determines accuracy and the credibility of bulk testing result.
In recent years, concrete temperature stress testing machine technology has obtained large development, external relatively representational scholar
With mechanism mainly have Kovler, Switzerland W+B, the TSTM of Tokyo University, domestic mainly have Tsing-Hua University and Wuhan University of Technology
TSTM etc..Measurement means about deformation also differs from one another, about surveying the sensor deformed, except the TSTM of Wuhan science and engineering selects
Outside Laser Measuring displacement transducer, other unit all selects LVDT as displacement transducer.Sensor is mainly distributed on concrete examination
The left and right sides of part, represents the deformation of concrete by the meansigma methods of both sides deformation, but often due to eccentricity issues, both sides
Deformation-sensor measured value gap is relatively big, and the reliability of measurement result is produced impact.
It addition, most TSTM are all to represent, with the active chuck displacement measured, the deformation that concrete occurs, W+B company
Although TSTM have employed embedded type and directly surveys the deformation of concrete, but owing to its side template is the most disengagable, the deformation of concrete
By the inhibition of side template, deform by also being limited by side template and act on, temporarily during burying bar and transmitting simultaneously
Direct measurement to concrete deformation is also difficult to.
Owing to the most all using the means of temperature control template or subenvironment case to control the temperature of concrete sample, survey deformation
Sensor be all in laboratory environment, with the experimental situation of concrete sample differing.When variation of ambient temperature, position
The deformation that displacement sensor records is not only just the deformation of concrete, further comprises the deformation that variations in temperature causes.
Generally, current domestic and international TSTM deformation measurement means are owing to measuring the displacement of active chuck and non-immediate survey
Determine the deformation of concrete, survey deformation-sensor is affected by variation of ambient temperature, the eccentric two side senser measured value gaps of stress are bigger
Etc. reason, measured deformation result error is very big, even can obtain experimental phenomena and the conclusion of mistake.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention carries
Having gone out a kind of concrete temperature stress testing machine that can directly measure concrete deformation, described concrete temperature stress testing machine can
Directly measuring the deformation of concrete, it is more accurate to measure.
The invention allows for a kind of concrete temperature stress test method that can directly measure concrete deformation.
The concrete temperature stress testing machine that can directly measure concrete deformation according to embodiments of the present invention, including: machine
Body, described body is provided with multiple mobilizable template, and the cooperation of multiple described templates limits the mould being suitable to place concrete block
Chamber；Upper deformation measuring system, described upper deformation measuring system includes: two upper pre-buried bars, two described pre-buried bars are positioned at institute
Stating above die cavity, the lower end of two described pre-buried bars is respectively equipped with the built-in fitting being adapted to extend in described concrete block；Upload
Sensor, described upper sensor is located at the top of one of them described pre-buried bar；On extend bar, described in extend one end of bar and institute
State sensor to be connected, described on the extend other end pre-buried bar upper with described in other in which of bar be connected.
Concrete temperature stress testing machine according to embodiments of the present invention, can directly measure the deformation of concrete, measures essence
Really property is high.
It addition, concrete temperature stress testing machine according to the above embodiment of the present invention can also have following additional skill
Art feature:
According to some embodiments of the present invention, also include that two side deformation measuring systems, two side deformation measuring systems divide
Not being located at the both sides of described die cavity, each described side deformation measuring system includes: two pre-buried bars in side, two pre-buried bars in described side
One end is respectively equipped with the built-in fitting being adapted to extend in described concrete block；Side senser, described side senser is located at one of them
The other end of the pre-buried bar in described side；Extending bar in side, extend one end of bar, described side is connected with described side senser, extends in described side
The other end of bar bar pre-buried with side described in other in which is connected.
According to some embodiments of the present invention, each described side deformation measuring system also includes flexible adjustment assembly, described
Flexible adjustment assembly includes: two threaded collars, and two described threaded collars are spaced apart to be set on the pre-buried bar in described side and edge
The axial location of the pre-buried bar in described side is adjustable, and the described threaded collar of neighbouring described template only supports the lateral surface of described template；Adjust
Joint spring, described regulation spring housing is located on the pre-buried bar in described side and is only against between two described threaded collars.
According to some embodiments of the present invention, the radial section of each described built-in fitting is formed as cross.
According to some embodiments of the present invention, also include that positioning tool, described positioning tool are located on described body, described
Positioning tool includes the upper keeper for positioning described upper deformation measuring system and for two described side deformation measurements
Two side keepers that system positions respectively.
According to some embodiments of the present invention, described upper keeper includes two native font locating racks, and two native fonts are fixed
Position is erected at the two ends of described upper deformation measuring system, and each described soil font locating rack includes: two connecting rods, two connections
Bar be arranged in parallel and is connected with body；Location bar, described location bar and two described connecting rods are connected, stretching out of described location bar
Hold with described pre-buried bar or described on the extend other end of bar be connected.
According to some embodiments of the present invention, each described side deformation measuring system by corresponding described side keeper with
Described body elasticity is connected, and described each described side keeper includes: at least three height adjustment bolt, high described at least three
Degree regulation bolt is extended along described side the axially spaced setting of bar, each described height adjustment bolt can up and downly with institute
State body to be connected；At least three elastic component, the upper end of each described elastic component is connected with corresponding described height adjustment bolt, its
In the lower end bar pre-buried with described side of a described elastic component be connected and the lower end of at least one described elastic component is drawn with described side
Boom is connected.
Test method according to a second aspect of the present invention, comprises the following steps: S1: adjusts described template and installs on described
The pre-buried bar of pre-buried bar and described side；S2: casting concrete vibrating in described die cavity, makes described built-in fitting be positioned at concrete block
In；S3: adjust bar of extending on described, bar and side senser are extended in upper sensor, side；S4: the demoulding after the concrete is cured, utilizes
Described upper sensor and the deformation of described side senser detection concrete, detection analysis obtains testing Deformation control value, to realize
Feedback control.
According to some embodiments of the present invention, in described step S4, temperature T of initial time installed in record0And test
Ambient temperature T of detection-phaset, and utilize formula ε=ε0-α(Tt-T0) described upper sensor and described side senser are surveyed
Deformation is modified, wherein, and ε0For the concrete deformation recorded before temperature adjustmemt, α is the Thermal Synthetic coefficient of expansion of testing machine.
Alternatively, in step s 4, if Shu is εB-εCShu/(Shu εB+εCShu) ＞ 20%, then with εAReal as test Deformation control value
Existing feedback control；Otherwise, then with (εA+εB+εC)/3 are as test Deformation control value, wherein, εA、εBAnd εCRepresent upper sensing respectively
Deformation values after device and two temperature compensated corrections of side senser.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the part-structure top view of concrete temperature stress testing machine according to embodiments of the present invention；
Fig. 2 is the part-structure front view of concrete temperature stress testing machine according to embodiments of the present invention；
Fig. 3 is the sectional view in A-A direction along the line in Fig. 2.
Reference: body 1；Sensor locating support 2；Soil font locating rack 3；Side senser 4；Extend bar 5 in side；Upload
Sensor 6；Upper pre-buried bar 7；On extend bar 8；Elastic component 9；Height adjustment bolt 10；Built-in fitting 11；Threaded collar 12；Regulation spring
13。
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings.Below with reference to
The embodiment that accompanying drawing describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Describe the coagulation soil temperature that can directly measure concrete deformation according to embodiments of the present invention below in conjunction with the accompanying drawings in detail
Degree pressure tester.
Referring to figs. 1 through shown in Fig. 3, the concrete temperature that can directly measure concrete deformation according to embodiments of the present invention should
Force tester includes body 1 and upper deformation measuring system, upper deformation measuring system include two upper pre-buried bars 7, on extend bar 8 and
Upper sensor 6.
Body 1 is provided with multiple template, and the cooperation of multiple templates limits die cavity, can pour into a mould concrete and form examination in die cavity
The concrete block tested.Multiple templates can be movable relative to body 1, thus can realize form removal after the concrete is cured.Two
Individual pre-buried bar 7 is positioned at above die cavity, two upper spaced apart settings of built-in fitting 11, arranges position as caused by A in Fig. 1, position.
The lower end of each pre-buried bar 7 is provided with built-in fitting 11, and when being provided with concrete block in die cavity, built-in fitting 11 can stretch into concrete
In block, upper sensor 6 is located at the top of pre-buried bar 7 on one of them, (such as, the right side shown in Fig. 1, one end of bar 8 of above extending
End) it is connected with upper sensor 6, wherein, upper pre-buried bar 7 can be provided with sensor stand 2, upper sensor 6 can be arranged on biography
On sensor bracket 2, bar 8 of above extending can be located on sensor stand 2, and the one end of bar 8 of above extending is (such as, shown in Fig. 1
Left end) bar 7 pre-buried with in other in which be connected.
Concrete temperature stress testing machine according to embodiments of the present invention, by being provided with the upper pre-buried bar of built-in fitting 11
7, extend on bar 8 and upper sensor 6, during concrete deformation, can directly drive pre-buried bar 7 to move, and by upper sensor 6
Detecting, and template can be with the demoulding, the impact on concrete deformation is less, it is possible to achieve by the upper surface at concrete block
Directly burying bar and measure the true strain of concrete, the systematic error produced during reducing displacement transfer, with measurement active chuck
The method of displacement compare, can directly measure the practical distortion of concrete, the result recorded is more directly and precision is higher.
Further, concrete temperature stress testing machine according to embodiments of the present invention can also include that two side deformation are surveyed
Amount system, two side deformation measuring systems are respectively provided at the both sides of die cavity, and each side deformation measuring system includes that two sides are pre-buried
Extend bar 5 in bar, side senser 4 and side.One end of the pre-buried bar in each side is provided with built-in fitting 11, and side senser 4 is located at one of them
The other end of the pre-buried bar in side, when being provided with concrete block in die cavity, built-in fitting 11 can stretch in concrete block.Extend bar 5 in side
One end be connected with side senser 4, the extend other end bar pre-buried with other in which side of bar 5 of side is connected.Wherein, the pre-buried bar in side
On can be provided with sensor stand 2, side senser 4 can be arranged on sensor stand 2, and side bar 5 of extending can be located in biography
On sensor bracket 2.
Thus, the detection of concrete deformation is realized not only by upper deformation measuring system, it is also possible to by two sides
Deformation is detected by deformation measuring system, and detection position is more, and deformation detection is more comprehensively and accurately.
Preferably, the radial section of each built-in fitting 11 is formed as cross.It is to say, it is upper pre-buried for being arranged on
For built-in fitting 11 on bar 7, along being perpendicular to axially carrying out cutting and can forming criss-cross cross section of upper pre-buried bar 7；Right
For the built-in fitting 11 being arranged on the pre-buried bar in side, along being perpendicular to axially carrying out cutting and can forming cross of the pre-buried bar in side
The cross section of shape.Criss-cross built-in fitting 11 can increase contact and lifting surface area, beneficially concrete and the compatibility of deformation burying bar,
Improve the accuracy of detection further.
Each side deformation measuring system also includes flexible adjustment assembly, and as shown in Figure 1 to Figure 3, flexible adjustment assembly includes
Two threaded collars 12 and regulation spring 13, two threaded collars 12 are respectively sleeved on the pre-buried bar in side and the pre-buried bar along side
Axially spaced, wherein, two threaded collars 12 along side the axial location of pre-buried bar adjustable so that two threaded collars 12 it
Spacing can change, and the threaded collar 12 of adjacent mold plate only supports the lateral surface of template, i.e. threaded collar 12 is only against side template
Lateral surface on.Regulation spring 13 is set on the pre-buried bar in side and is only against between two threaded collars 12.Thus, it is possible to it is logical
Overregulate two threaded collars 12 and change the elastic force of regulation spring 13, it is to avoid side template disengages the shadow of offside pre-buried bar position
Ring, improve the accuracy of deformation detection further.
According to some embodiments of the present invention, concrete temperature stress testing machine also includes positioning tool, and positioning tool sets
On body 1, positioning tool includes the upper keeper for positioning upper deformation measuring system and for offside deformation measurement system
The side keeper of system location.Thus, it is possible to realize upper deformation measuring system and side change respectively by upper keeper and side keeper
Shape measures the accurate installation of system, is further ensured that the accuracy of detection.
It is understood that the structure of upper keeper and side keeper is formed as multiple, alternatively, upper keeper includes
Two native font locating racks 3, two native font locating racks 3 are located at the two ends of deformation measuring system, with to upper deformation measurement system
Two of system realizes location, makes deformation measuring system integral installation more accurate.Each soil font locating rack 3 includes two connecting rods
With location bar.Two connecting rods be arranged in parallel and are connected with body 1, and location bar and two connecting rods are connected, stretching of location bar
Go out the end head of font (i.e. soil) and upper pre-buried bar 7 or on the extend other end of bar 8 be connected.
Specifically, one in the bar of location is connected with upper pre-buried bar 7, in two location bars another and on extend bar
8 are connected.As it is shown in figure 1, the location bar being positioned at right side is connected with upper pre-buried bar 7, be positioned on the left of location bar with on extend bar 8 phase
Even.Thus, it is possible to two location bars are with reference to the location realizing upper deformation measuring system two ends, it is ensured that upper pre-buried bar 7 and upper
The accurate installation of bar 8 grade of extending.The keeper of this soil font is possible not only to reduce material usage, and structure is the most firm, fixed
Position is effective.
Side deformation measuring system includes two, and side keeper also includes two, and each side deformation measuring system is by correspondence
Side keeper and body 1 elasticity be connected.As it is shown on figure 3, each side keeper includes at least three height adjustment bolt 10 He
At least three elastic component, at least three height adjustment bolt 10 and at least three elastic component one_to_one corresponding.At least three height is adjusted
Joint bolt 10 is extended along side the axially spaced of bar 5, and each height adjustment bolt 10 can be connected with body 1 up and downly.Can
Selection of land, body 1 can be threaded hole, and each height adjustment bolt 10 is threaded in the screwed hole of correspondence, Mei Gegao
Degree regulation bolt 10 can rotate, it is achieved the regulation of upper-lower position.The upper end of each elastic component and corresponding height adjustment bolt
10 are connected, the lower end of one of them elastic component bar pre-buried with side is connected and extends in the lower end of at least one elastic component and side bar 5
It is connected.
Such as, as shown in Figure 1 to Figure 3, each side keeper includes four height adjustment bolt 10 and four elastic components, bullet
Property part is the spring vertically extended, and four elastic components are the most arranged spaced apart, an elastic component above
Bar pre-buried with side is connected, and the bar 5 of extending with side of three elastic components below is connected, make side extend bar 5 can pole pair pre-buried with side should
Mobile.
It is connected with the elastic of body 1 thus, it is possible to realize side deformation measuring system by elastic component, facilitates the tune of testing machine
Joint and installation, and it is more beneficial for the detection of deformation.
Describe below and use concrete temperature stress testing machine according to embodiments of the present invention to carry out concrete deformation test
Test method, this test method comprises the following steps:
S1: adjust described template and install the pre-buried bar of described pre-buried bar 7 and described side.
S2: casting concrete vibrating in described die cavity, makes described built-in fitting 11 be positioned at concrete block.
S3: adjust bar 8 of extending on described, bar 5 and side senser 4 are extended in upper sensor 6, side.
S4: the demoulding after the concrete is cured, utilizes described upper sensor 6 and described side senser 4 to detect the change of concrete
Shape, detection analysis obtains testing Deformation control value, to realize feedback control.
Test method according to embodiments of the present invention can realize the direct detection of concrete deformation, detects more comprehensively and accurate
Really.
Further, in step s 4, temperature T of initial time installed in record0Ambient temperature T with experimental staget, and
Utilize formula ε=ε0-α(Tt-T0) upper sensor 6 and the surveyed deformation of side senser 4 are modified, wherein, ε0For temperature adjustmemt
Before the concrete deformation that records, α is the Thermal Synthetic coefficient of expansion of testing machine.Thus, it is possible to utilize the side of temperature self-compensation correction
Formula, eliminates the variation of ambient temperature impact on surveyed deformation values, and measured value long-time stability are good.
Further, in step s 4, if Shu is εB-εCShu/(Shu εB+εCShu) ＞ 20%, then with εAAs test Deformation control
Value realizes feedback control；Otherwise, then with (εA+εB+εC)/3 are as test Deformation control value, wherein, εA、εBAnd εCOn representing respectively
Deformation values after sensor 6 and two temperature compensated corrections of side senser 4.Thus, utilize three set deformation measurement real
Switching of now living carries out feedback control testing machine, and control action is good.
Fig. 1 to Fig. 3 shows a concrete example of concrete temperature stress testing machine according to embodiments of the present invention.As
Shown in Fig. 1 to Fig. 3, vibrate the stage in concreting, can install pre-buried with the upper surface of concrete block pre-buried bar position
Bar 7, and criss-cross built-in fitting 11 is connected in the lower end of upper pre-buried bar 7, simultaneously upper pre-by the upper keeper location of soil font
Bury the position of bar 7.Location and installation is carried out by the side pre-buried bar of keeper offside comprising elastic component and height adjustment bolt 10；Twist
The stress of tight threaded collar 12 regulation regulation spring 13, it is ensured that the stage of vibrating bury bar stable while, multiple templates, particularly side
Template will not occur spillage phenomenon.As in figure 2 it is shown, be provided with on upper pre-buried bar 7 sensor 6 and on extend bar 8, such as Fig. 1 institute
Showing, on the pre-buried bar in side, extend bar 5 in installation side sensor 4 and side, a whole set of deformation measuring system of concrete temperature stress testing machine
As illustrated in fig. 1 and 2.
The demoulding of side template and end template can be carried out after concrete hardening.After the side template demoulding, adjust pine threaded collar
12, discharge regulation spring 13 elastic force, it is ensured that the deformation of the pre-buried bar in side transmission is not limited by side template, it is ensured that side is pre-buried
Bar and the concordance of concrete deformation, improve the accuracy of deformation detection further.
Can utilize temperature sensor record that temperature T of deformation measuring system initial time is installed0Ring with experimental stage
Border temperature Tt；Utilize formula: ε=ε0-α(Tt-T0) upper sensor 6 and the surveyed deformation of side senser 4 are modified.Wherein, α
For the Thermal Synthetic coefficient of expansion of testing machine, including the indium steel bar in grating displacement sensor and survey deformation gauge length, can pass through
Actual measurement determines.
When switching of living utilizing three set deformation measurement to realize carries out feedback control, as Shu εB-εCShu/(Shu εB+εCShu) ＞
20%, i.e. εBAnd εCEccentric degree less than 20%, then with εAFeedback control is realized as test Deformation control value；Otherwise, if Shu
εB-εCShu/(Shu εB+εCWhen Shu)≤20%, i.e. εBAnd εCEccentric degree more than 20% time, then with (εA+εB+εC)/3 become as test
Shape controlling value.
In sum, concrete temperature stress testing machine according to embodiments of the present invention is a kind of at temperature stress testing machine
System is not affected by variation of ambient temperature, can directly be measured the measuring instrument of concrete deformation, be that one can directly be measured mixed
Solidifying soil deforms and has the concrete temperature stress testing machine of temperature compensation function, it is possible to effectively overcome the coagulation in correlation technique
Soil temperature degree pressure tester is surveyed deformation the problem such as the true strain of non-concrete, certainty of measurement be the highest, concrete sample with
Deformation measuring system is in same experimental enviroment, can the impact of self-compensated temperature deformation, and directly measure the true of concrete
Deformation, has precision high, the advantage that long-time stability are good.
Other of concrete temperature stress testing machine according to embodiments of the present invention constitute and operate for this area
It is knowable for those of ordinary skill, is not described in detail at this.
In describing the invention, it is to be understood that term " " center ", " on ", D score, "front", "rear", " vertically ",
The orientation of the instruction such as " level ", " top ", " end ", " interior ", " outward " or position relationship are to close based on orientation shown in the drawings or position
System, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must have
Specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In describing the invention, " multiple " are meant that at least two, such as two, three etc., unless otherwise clearly
Concrete restriction.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible
It is connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " specific embodiment ", " example " or " concrete example " etc.
Description means to combine this embodiment or example describes specific features, structure, material or feature be contained in the present invention extremely
In a few embodiment or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical
Embodiment or example.And, the specific features of description, structure, material or feature can with one or more embodiments in office or
Example combines in an appropriate manner.Additionally, in the case of the most conflicting, those skilled in the art can be by this explanation
Different embodiments or the feature of example and different embodiment or example described in book are combined and combine.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. can directly measure a concrete temperature stress testing machine for concrete deformation, including:
Body, described body is provided with multiple mobilizable template, and the cooperation of multiple described templates limits and is suitable to place concrete
The die cavity of block；
Upper deformation measuring system, described upper deformation measuring system includes:
Two upper pre-buried bars, two described pre-buried bars are positioned at above described die cavity, and the lower end of two described pre-buried bars is respectively
It is provided with the built-in fitting being adapted to extend in described concrete block；
Upper sensor, described upper sensor is located at the top of one of them described pre-buried bar；
On extend bar, described in extend one end of bar be connected with described upper sensor, described on extend bar the other end with described its
In another described pre-buried bar be connected.
Concrete temperature stress testing machine the most according to claim 1, it is characterised in that also include two side deformation measurements
System, two side deformation measuring systems are respectively provided at the both sides of described die cavity, and each described side deformation measuring system includes:
Two pre-buried bars in side, one end of two pre-buried bars in described side is respectively equipped be adapted to extend in described concrete block pre-buried
Part；
Side senser, described side senser is located at the other end of one of them pre-buried bar in described side；
Extending bar in side, extend one end of bar, described side is connected with described side senser, described side extend bar the other end with wherein
Another pre-buried bar in described side is connected.
Concrete temperature stress testing machine the most according to claim 2, it is characterised in that each described side deformation measurement system
System also includes that flexible adjustment assembly, described flexible adjustment assembly include:
Two threaded collars, two described threaded collars are spaced apart to be set on the pre-buried bar in described side and along the pre-buried bar in described side
Axial location is adjustable, and the described threaded collar of neighbouring described template only supports the lateral surface of described template；
Regulation spring, described regulation spring housing is located on the pre-buried bar in described side and is only against between two described threaded collars.
Concrete temperature stress testing machine the most according to claim 2, it is characterised in that the radial direction of each described built-in fitting
Cross section is formed as cross.
Concrete temperature stress testing machine the most according to claim 2, it is characterised in that also include positioning tool, described
Positioning tool is located on described body, and described positioning tool includes the upper keeper for positioning described upper deformation measuring system
With two side keepers for two described side deformation measuring systems are positioned respectively.
Concrete temperature stress testing machine the most according to claim 5, it is characterised in that described upper keeper includes two
Soil font locating rack, two native font locating racks are located at the two ends of described upper deformation measuring system, each described soil font location
Frame includes:
Two connecting rods, two described connecting rods be arranged in parallel and are connected with body；
Location bar, described location bar and two described connecting rods are connected, the external part of described location bar and described pre-buried bar or
Extend on described bar the other end be connected.
Concrete temperature stress testing machine the most according to claim 5, it is characterised in that each described side deformation measurement system
Uniting and be connected with described body elasticity by corresponding described side keeper, described each described side keeper includes:
At least three height adjustment bolt, extend along the described side axially spaced-apart of bar of height adjustment bolt described at least three is offered
Putting, each described height adjustment bolt can be connected with described body up and downly；
At least three elastic component, the upper end of each described elastic component is connected with corresponding described height adjustment bolt, one of them
Bar phase that the lower end of described elastic component bar pre-buried with described side is connected and extends in lower end and the described side of at least one described elastic component
Even.
8. use the test method according to the concrete temperature stress testing machine according to any one of claim 2-7, bag
Include following steps:
S1: adjust described template and install the pre-buried bar of described pre-buried bar and described side；
S2: casting concrete vibrating in described die cavity, makes described built-in fitting be positioned at concrete block；
S3: adjust bar of extending on described, bar and side senser are extended in upper sensor, side；
S4: the demoulding after the concrete is cured, utilizes described upper sensor and the deformation of described side senser detection concrete, detection
Analysis obtains testing Deformation control value, to realize feedback control.
Test method the most according to claim 8, it is characterised in that in described step S4, initial time installed in record
Temperature T0Ambient temperature T with the testing inspection staget, and utilize formula: ε=ε0-α(Tt-T0) to described upper sensor and institute
State the surveyed deformation of side senser to be modified, wherein, ε0For the concrete deformation recorded before temperature adjustmemt, α is combining of testing machine
Close thermal coefficient of expansion.
Test method the most according to claim 9, it is characterised in that in described step S4,
If Shu is εB-εCShu/(Shu εB+εCShu) ＞ 20%, then with εAFeedback control is realized as test Deformation control value；Otherwise, then with (εA
+εB+εC)/3 are as test Deformation control value, wherein, εA、εBAnd εCRepresent that upper sensor and two side sensers are through temperature respectively
Deformation values after compensating approach.
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| CN201610539510.5A CN106093358B (en) | 2016-07-08 | 2016-07-08 | Can direct measurement concrete deformation concrete temperature stress testing machine and method |
| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108226217A (en) * | 2018-01-12 | 2018-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | The concrete humiture and deflection experimental rig and application method of addition swelling agent |
| CN109030795A (en) * | 2018-08-28 | 2018-12-18 | 交通运输部公路科学研究所 | The testing equipment and test method of indoor test concrete mix lateral deformation amount |
| CN109142006A (en) * | 2018-11-09 | 2019-01-04 | 交通运输部天津水运工程科学研究所 | For microsensor accurate positioning and quick inbuilt device and method |
| CN109975120A (en) * | 2019-04-18 | 2019-07-05 | 中国建筑材料科学研究总院有限公司 | Concrete restraint stress and deformational stress measuring device and measuring method |
| CN110658332A (en) * | 2019-09-30 | 2020-01-07 | 中国水利水电科学研究院 | Concrete lining pre-pressure measurement test device and test method thereof |
| CN113777283A (en) * | 2021-09-17 | 2021-12-10 | 中国水利水电科学研究院 | Method for directly measuring concrete stress of dam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906546Y (en) * | 2006-05-25 | 2007-05-30 | 长安大学 | Concrete built-in type strain measurement sensor |
| CN200962108Y (en) * | 2006-10-13 | 2007-10-17 | 武汉理工大学 | Restraint-adjustable single axis temperature-pressure test machine |
| CN101245991A (en) * | 2008-02-04 | 2008-08-20 | 重庆大学 | Concrete early deformation non-contact test method and device |
| CN201149484Y (en) * | 2008-02-05 | 2008-11-12 | 重庆大学 | Non-contact test device for concrete early deformation |
| CN201203404Y (en) * | 2008-04-30 | 2009-03-04 | 中国葛洲坝集团股份有限公司 | Concrete deformation test device |
| CN205941547U (en) * | 2016-07-08 | 2017-02-08 | 清华大学 | But concrete temperature stress testing machine that direct measurement concrete warp |
-
2016
- 2016-07-08 CN CN201610539510.5A patent/CN106093358B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906546Y (en) * | 2006-05-25 | 2007-05-30 | 长安大学 | Concrete built-in type strain measurement sensor |
| CN200962108Y (en) * | 2006-10-13 | 2007-10-17 | 武汉理工大学 | Restraint-adjustable single axis temperature-pressure test machine |
| CN101245991A (en) * | 2008-02-04 | 2008-08-20 | 重庆大学 | Concrete early deformation non-contact test method and device |
| CN201149484Y (en) * | 2008-02-05 | 2008-11-12 | 重庆大学 | Non-contact test device for concrete early deformation |
| CN201203404Y (en) * | 2008-04-30 | 2009-03-04 | 中国葛洲坝集团股份有限公司 | Concrete deformation test device |
| CN205941547U (en) * | 2016-07-08 | 2017-02-08 | 清华大学 | But concrete temperature stress testing machine that direct measurement concrete warp |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108226217A (en) * | 2018-01-12 | 2018-06-29 | 上海市城市建设设计研究总院（集团）有限公司 | The concrete humiture and deflection experimental rig and application method of addition swelling agent |
| CN109030795A (en) * | 2018-08-28 | 2018-12-18 | 交通运输部公路科学研究所 | The testing equipment and test method of indoor test concrete mix lateral deformation amount |
| CN109142006A (en) * | 2018-11-09 | 2019-01-04 | 交通运输部天津水运工程科学研究所 | For microsensor accurate positioning and quick inbuilt device and method |
| CN109142006B (en) * | 2018-11-09 | 2023-09-05 | 交通运输部天津水运工程科学研究所 | Device and method for accurately positioning and quickly burying miniature sensor |
| CN109975120A (en) * | 2019-04-18 | 2019-07-05 | 中国建筑材料科学研究总院有限公司 | Concrete restraint stress and deformational stress measuring device and measuring method |
| CN109975120B (en) * | 2019-04-18 | 2021-07-20 | 中国建筑材料科学研究总院有限公司 | Concrete constraint stress and deformation stress measuring device and measuring method |
| CN110658332A (en) * | 2019-09-30 | 2020-01-07 | 中国水利水电科学研究院 | Concrete lining pre-pressure measurement test device and test method thereof |
| CN113777283A (en) * | 2021-09-17 | 2021-12-10 | 中国水利水电科学研究院 | Method for directly measuring concrete stress of dam |
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