CN106290808A - The charger of concrete durability experiment and method under load coupling - Google Patents
The charger of concrete durability experiment and method under load coupling Download PDFInfo
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- CN106290808A CN106290808A CN201510267161.1A CN201510267161A CN106290808A CN 106290808 A CN106290808 A CN 106290808A CN 201510267161 A CN201510267161 A CN 201510267161A CN 106290808 A CN106290808 A CN 106290808A
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Abstract
The present invention relates to a kind of charger and the method for concrete durability experiment under load coupling, this device includes longitudinally disposed in a left side, two matrix pull bars of right both sides, at least two concrete prism stacks the most successively and is across on the recess of two matrix pull bars, on, it is vertically arranged with two first rod irons between lower two adjacent concrete prisms, each matrix pull bar two upper end is arranged with matrix packing washer the most successively, Washer-type Presure Sensor, stage clip and threaded fastener, it is vertically arranged with the second rod iron between described matrix packing washer and the concrete prism of topmost, with when described threaded fastener is locked downwards, stage clip is through Washer-type Presure Sensor, matrix packing washer, second rod iron is accurately further applied load to concrete prism.This device and method reasonable in design, simple, load uniformly, accurately, load effective, and be suitable for the experimental enviroment of various concrete durable test.
Description
Technical field
The present invention relates to concrete durability technical field of measurement and test, particularly to charger and the method for a kind of concrete durability experiment under load coupling.
Background technology
It is traditionally used for assay device and the loading method being further applied load when studying Durability of Concrete, or owing to loading range is the least, or owing to this body structure of charger is complicated and designs unreasonable, or owing to loading accuracy is the best and loads uneven, or owing to charger is prone to corrosion, causing charger and corresponding loading method poor for applicability, the test data drawn is inaccurate, leverages result of the test.
Summary of the invention
It is an object of the invention to provide a kind of charger and the method for concrete durability experiment under load coupling, this device and method reasonable in design, simple, load uniformly, accurately, load effective.
For achieving the above object, the technical scheme is that a kind of charger of concrete durability experiment under load coupling, including longitudinally disposed in a left side, two matrix pull bars of right both sides, at least two concrete prism stacks the most successively and is across on the recess of two matrix pull bars, on, it is vertically arranged with two first rod irons between lower two adjacent concrete prisms, each matrix pull bar two upper end is arranged with matrix packing washer the most successively, Washer-type Presure Sensor, stage clip and threaded fastener, it is vertically arranged with the second rod iron between described matrix packing washer and the concrete prism of topmost, with when described threaded fastener is locked downwards, stage clip is through Washer-type Presure Sensor, matrix packing washer, second rod iron is accurately further applied load to concrete prism.
Further, the upper and lower side at described stage clip is equipped with packing washer, and to ensure that stage clip Vertical Uniform compresses, power transmission is uniform；The matrix packing washer being sheathed on matrix pull bar two upper end connects as one, to ensure the spacing between two vertical bars of matrix pull bar and the verticality of matrix pull bar.
Further, from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at the third office between two matrix pull bar place planes, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at two matrix pull bar institutes in the plane, and wherein n is the integer more than 0；If concrete prism has even number root, the most described second rod iron is arranged at described matrix pull bar institute in the plane, if concrete prism has odd number root, the most described second rod iron is arranged at the third office between two matrix pull bar place planes, and it is provided with rigidity force transmission beam between described second rod iron and matrix packing washer, to transmit, to described second rod iron, the pressure that described matrix packing washer applies.
Further, described Washer-type Presure Sensor is connected with microcomputer control unit, to detect the payload values that stage clip applies, it is ensured that the payload values suffered by concrete prism meets requirement.
Further, described concrete prism is provided with at least two piezoelectric type force cell on the surface contacted with same first rod iron or the second rod iron, and described piezoelectric type force cell edge longitudinal direction is distributed on the surface that described concrete prism contacts with same first rod iron or the second rod iron, described piezoelectric type force cell is connected with microcomputer control unit, the most consistent to detect the stress size of each contact position, thus correct the first rod iron and the position of the second rod iron.
Further, described matrix pull bar is bent to form by cylindrical steel rods.
Present invention also offers a kind of loading method of concrete durability experiment under load coupling, comprise the following steps:
(1) concrete prism of maintenance to regulation age is carried out line location: determine matrix pull bar and the second rod iron placement location, concrete prism draws two the first straight lines in the width direction；To the concrete prism trisection between two the first straight lines, and draw the second straight line along trisection line, so that it is determined that the first rod iron placement location；
(2) longitudinally parallel two matrix pull bars are set, and the concrete prism painting line is across on the recess of two matrix pull bars, and make matrix pull bar and the first straight line at grade；
(3) longitudinally disposed first rod iron on described concrete prism, then arranges another concrete prism on described first rod iron；Same procedure is used to stack the first rod iron and concrete prism successively, until all concrete prisms have stacked；The method to set up of described first rod iron is: from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at described second straight line, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at described first straight line, and wherein n is the integer more than 0；
(4) longitudinally disposed second rod iron on the upside of the concrete prism of topmost, the method to set up of described second rod iron is: if concrete prism has even number root, the most described second rod iron is arranged at described first straight line；If concrete prism has odd number root, the most described second rod iron is arranged at described second straight line, and arranges rigidity force transmission beam between described second rod iron and matrix packing washer, to transmit, to described second rod iron, the pressure that described matrix packing washer applies；Then it is inserted in, in each matrix pull bar two upper end, the matrix packing washer connected as one, to be pushed down the concrete prism of topmost by described second rod iron；
(5) it is inserted in Washer-type Presure Sensor, packing washer, stage clip and packing washer respectively in each matrix pull bar two upper end, and screws in threaded fastener and lock downwards；
(6) described Washer-type Presure Sensor is connected to microcomputer control unit, to be detected the payload values size of stage clip applying by described Washer-type Presure Sensor and to adjust rod iron position；Rotate threaded fastener, the decrement of regulation stage clip, the load being sized with applying；
(7) the whole device of loaded is put in specific environmental test chamber, carry out durability test.
Further, in step (2), before stacking described first rod iron and concrete prism, the surface that described concrete prism and the first rod iron contact arranges piezoelectric type force cell；In step (3), before the second rod iron is set, the surface that described concrete prism and the second rod iron contact is also provided with piezoelectric type force cell；Described piezoelectric type force cell is connected with microcomputer control unit, to detect the stress size of each contact position；Then according to the stress size of each contact position, the degree that screws of the different threaded fastener of regulation and rod iron position, concrete prism applies uniform load so that the durability under the pure pressure of concrete or pure tension state can be tested..
Further, in step (7) a metallic, the change of concrete prism stress during durability test is monitored by described microcomputer control unit.
Further, in step (6), according to formula F= K* l, wherein F is the required payload values applied, and K is the coefficient of elasticity of stage clip,lFor the decrement of stage clip, regulate the decrement of stage clip, thus on concrete prism, apply uniform load by the decrement of regulation stage clip.
Compared with prior art, the invention has the beneficial effects as follows: the present invention detecting or the decrement of regulation stage clip by force cell, it is achieved the accurate compression displacement of stage clip, accomplish that displacement accurately loads；Owing to endurancing needing consider that long-term initial load such as anti-carbonation, chloride-penetration resistance etc. are tested, this charger and Method And Principle are simple and clear, easy and simple to handle, with low cost, repeat usage is high, compact, the error caused due to temperature is the least, loading effect is obvious, reaches the self-balancing of self, can meet the most large batch of endurancing；Loading system dependable performance of the present invention, does not the most occur the phenomenon of stress relaxation in whole process of the test.
Accompanying drawing explanation
Fig. 1 is the charger structure front elevational schematic of one embodiment of the invention.
Fig. 2 is structure schematic side view corresponding for Fig. 1.
Fig. 3 is the charger structure front elevational schematic of another embodiment of the present invention.
Fig. 4 is the circuit connection diagram of embodiment of the present invention middle washer formula pressure transducer, piezoelectric type force cell and microcomputer control unit.
In figure: 1-matrix pull bar, 2-concrete prism, 3-the first rod iron, 4-matrix packing washer, 5-stage clip, 6-threaded fastener, 7-the second rod iron, 8-Washer-type Presure Sensor, 9-packing washer, 10-microcomputer control unit, the recess of 11-matrix pull bar, 12-piezoelectric type force cell, 13-rigidity force transmission beam.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
nullSuch as Fig. 1、Shown in 2，The present invention is the charger of concrete durability experiment under load coupling，Including longitudinally disposed in a left side、Two matrix pull bars 1 of right both sides，At least two concrete prism 2 stacks the most successively and is across on the recess 11 of two matrix pull bars 1，On、It is vertically arranged with two first rod irons 3 between lower two adjacent concrete prisms 2，1 liang of upper end of each matrix pull bar is arranged with matrix packing washer 4 the most successively、Washer-type Presure Sensor 8、Stage clip 5 and threaded fastener 6，The second rod iron 7 it is vertically arranged with between the concrete prism 2 of matrix packing washer 4 and topmost，With when threaded fastener 6 is locked downwards，Stage clip 5 is through Washer-type Presure Sensor 8、Matrix packing washer 4、Second rod iron 7 is accurately further applied load to concrete prism 2.
Wherein, the method to set up of the first rod iron 3 and the second rod iron 7 is: from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at the third office between two matrix pull bar place planes, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at two matrix pull bar institutes in the plane, and wherein n is the integer more than 0.If concrete prism 2 has even number root, then the second rod iron 7 is arranged at matrix pull bar 1 institute in the plane.As shown in Figure 3, if concrete prism 2 has odd number root, then the second rod iron 7 is arranged at the third office between two matrix pull bar 1 place planes, now rigidity force transmission beam 13 is set between the second rod iron 7 and matrix packing washer 4, to transmit, to the second rod iron 7, the pressure that matrix packing washer 4 applies.In present pre-ferred embodiments, it is contemplated that the cost problem of rigidity force transmission beam, the number of concrete prism is limited to even number, to exempt rigidity force transmission beam.
In the present embodiment, the upper and lower side at stage clip 5 is equipped with packing washer 9, and to ensure that stage clip 5 Vertical Uniform compresses, power transmission is uniform；The matrix packing washer 4 being sheathed on 1 liang of upper end of matrix pull bar connects as one, to ensure the spacing between 1 two vertical bars of matrix pull bar and the verticality of matrix pull bar.
In order to improve accuracy and the uniformity of loading, as shown in Figure 4, Washer-type Presure Sensor 8 is connected with microcomputer control unit 10, to detect the payload values that stage clip 5 applies, it is ensured that the payload values suffered by concrete prism 2 meets requirement.Additionally, concrete prism 2 is provided with piezoelectric type force cell 12 on the surface contacted with the first rod iron 3 or the second rod iron 7.Preferably, concrete prism 2 is provided with at least two piezoelectric type force cell 12 on the surface contacted with same first rod iron 3 or the second rod iron 7, and piezoelectric type force cell 12 is along being longitudinally distributed on the surface that concrete prism 2 contacts with same first rod iron 3 or the second rod iron 7.As shown in Figure 4, piezoelectric type force cell 12 is also connected with microcomputer control unit 9, the most consistent to detect the stress size of each contact position, thus correcting the first rod iron and the position of the second rod iron, it is ensured that the concrete load between above-mentioned two trisection lines (the second the most following straight line) is pure pressure or pure draws.
Owing to concrete durability test environment relative humidity is substantially more than 80%, or it is NaCl or Na2SO4Solution salt mist environment, even requires component is immersed in NaCl or Na2SO4In solution, so charger of the present invention and detection equipment thereof are all had protection against the tide and anti-corrosion requirement.In the present embodiment, Washer-type Presure Sensor 8 and piezoelectric type force cell 12 are anticorrosion damp-proof type sensor, to adapt to concrete durability test environment.The material of charger of the present invention is the steel beam column or stainless steel processed through special anti-corrosion, to adapt to different experimental test environment, it is ensured that the reliability of test data.
In the present embodiment, matrix pull bar 1 is bent to form by cylindrical steel rods, to ensure to load.Distance between two adjacent first rod irons 3 is equal to the distance of matrix pull bar 1 place plane with the first rod iron 3.A diameter of 25mm of the first rod iron 3.Stage clip 5 is automobile die springs, described automobile die springs can bear 300,000 CYCLIC LOADING, coefficient of elasticity (fixed number) according to automobile die springs and the compressed value of Hooke's law calculating automobile die springs, be accurate to mm, can be with the size of controlled loading power.
Present invention also offers a kind of loading method of concrete durability experiment under load coupling, comprise the following steps:
(1) concrete prism 2 of maintenance to regulation age is carried out line location: determine matrix pull bar 1 and the second rod iron 7 placement location, concrete prism 2 draws two the first straight lines in the width direction；To concrete prism 2 trisection between two the first straight lines, and draw the second straight line along trisection line, so that it is determined that the first rod iron 3 placement location.
(2) longitudinally parallel two matrix pull bars 1 are set, and the concrete prism 2 painting line is across on the recess 11 of two matrix pull bars 1, and make matrix pull bar 1 and the first straight line at grade.
(3) longitudinally disposed first rod iron 3 on concrete prism 2, then arranges another concrete prism 2 on the first rod iron 3；Same procedure is used to stack the first rod iron 3 and concrete prism 2 successively, until all concrete prisms 2 have stacked.The method to set up of the first rod iron 3 is: from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at the second straight line, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at the first straight line, and wherein n is the integer more than 0.
(4) longitudinally disposed second rod iron 7 on the upside of the concrete prism 2 of topmost, the method to set up of the second rod iron 7 is: if concrete prism 2 has even number root, then the second rod iron 7 is arranged at the first straight line；If concrete prism 2 has odd number root, then the second rod iron 7 is arranged at the second straight line, and arranges rigidity force transmission beam between the second rod iron 7 and matrix packing washer 4, to transmit, to the second rod iron 7, the pressure that matrix packing washer 4 applies；Then it is inserted in, in 1 liang of upper end of each matrix pull bar, the matrix packing washer 4 connected as one, to be pushed down the concrete prism 2 of topmost by the second rod iron 7.
(5) it is inserted in Washer-type Presure Sensor 8, packing washer 9, stage clip 5 and packing washer 9 respectively in 1 liang of upper end of each matrix pull bar, and screws in threaded fastener 6 and lock downwards.
(6) Washer-type Presure Sensor 8 is connected to microcomputer control unit 10, to be detected the payload values size of stage clip 5 applying by Washer-type Presure Sensor 8 and to adjust rod iron position；Rotate threaded fastener 6, the decrement of regulation stage clip 5, the load being sized with applying.
(7) the whole device of loaded is put in specific environmental test chamber, carry out durability test.
In present pre-ferred embodiments, in step (2), before stacking the first rod iron 3 and concrete prism 2, the surface that concrete prism 2 contacts with the first rod iron 3 arranges piezoelectric type force cell 12；In step (3), before the second rod iron 7 is set, the surface that concrete prism 2 contacts with the second rod iron 7 is also provided with piezoelectric type force cell 12；Piezoelectric type force cell 12 is connected with microcomputer control unit 10, to detect the stress size of each contact position；Then according to the stress size of each contact position, the degree that screws of the different threaded fastener 6 of regulation and the position of first rod iron the 3, second rod iron 7, thus by changing the decrement of different stage clip 5, concrete prism 2 applies uniform load；In step (7) a metallic, the change of concrete prism 2 stress during durability test is monitored by microcomputer control unit 10.
In an alternative embodiment of the invention, it is possible to according to formula F= K* l, wherein F is the required payload values applied, and K is the coefficient of elasticity of stage clip,lFor the decrement of stage clip, regulate the decrement of stage clip, thus on concrete prism 2, apply uniform load by the decrement of regulation stage clip 5.
It is above presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, when produced function is without departing from the scope of technical solution of the present invention, belong to protection scope of the present invention.
Claims (10)
1. the charger of concrete durability experiment under load coupling, it is characterized in that, including longitudinally disposed in a left side, two matrix pull bars of right both sides, at least two concrete prism stacks the most successively and is across on the recess of two matrix pull bars, on, it is vertically arranged with two first rod irons between lower two adjacent concrete prisms, each matrix pull bar two upper end is arranged with matrix packing washer the most successively, Washer-type Presure Sensor, stage clip and threaded fastener, it is vertically arranged with the second rod iron between described matrix packing washer and the concrete prism of topmost, with when described threaded fastener is locked downwards, stage clip is through Washer-type Presure Sensor, matrix packing washer, second rod iron is accurately further applied load to concrete prism.
The charger of concrete durability experiment under load coupling the most according to claim 1, it is characterised in that the upper and lower side at described stage clip is equipped with packing washer, to ensure that stage clip Vertical Uniform compresses, power transmission is uniform；The matrix packing washer being sheathed on matrix pull bar two upper end connects as one, to ensure the spacing between two vertical bars of matrix pull bar and the verticality of matrix pull bar.
The charger of concrete durability experiment under load coupling the most according to claim 1, it is characterized in that, from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at the third office between two matrix pull bar place planes, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at two matrix pull bar institutes in the plane, and wherein n is the integer more than 0；If concrete prism has even number root, the most described second rod iron is arranged at described matrix pull bar institute in the plane, if concrete prism has odd number root, the most described second rod iron is arranged at the third office between two matrix pull bar place planes, and it is provided with rigidity force transmission beam between described second rod iron and matrix packing washer, to transmit, to described second rod iron, the pressure that described matrix packing washer applies.
The charger of concrete durability experiment under load coupling the most according to claim 1; it is characterized in that; described Washer-type Presure Sensor is connected with microcomputer control unit, to detect the payload values that stage clip applies, it is ensured that the payload values suffered by concrete prism meets requirement.
The charger of concrete durability experiment under load coupling the most according to claim 1, it is characterized in that, described concrete prism is provided with at least two piezoelectric type force cell on the surface contacted with same first rod iron or the second rod iron, and described piezoelectric type force cell edge longitudinal direction is distributed on the surface that described concrete prism contacts with same first rod iron or the second rod iron, described piezoelectric type force cell is connected with microcomputer control unit, the most consistent to detect the stress size of each contact position, thus correct the first rod iron and the position of the second rod iron.
The charger of concrete durability experiment under load coupling the most according to claim 1, it is characterised in that: described matrix pull bar is bent to form by cylindrical steel rods.
7. the loading method of concrete durability experiment under load coupling, it is characterised in that comprise the following steps:
(1) concrete prism of maintenance to regulation age is carried out line location: determine matrix pull bar and the second rod iron placement location, concrete prism draws two the first straight lines in the width direction；To the concrete prism trisection between two the first straight lines, and draw the second straight line along trisection line, so that it is determined that the first rod iron placement location；
(2) longitudinally parallel two matrix pull bars are set, and the concrete prism painting line is across on the recess of two matrix pull bars, and make matrix pull bar and the first straight line at grade；
(3) longitudinally disposed first rod iron on described concrete prism, then arranges another concrete prism on described first rod iron；Same procedure is used to stack the first rod iron and concrete prism successively, until all concrete prisms have stacked；The method to set up of described first rod iron is: from bottom to top, the first rod iron between (2n-1) individual concrete prism and the 2n concrete prism is arranged at described second straight line, the first rod iron between 2n concrete prism and (2n+1) individual concrete prism is arranged at described first straight line, and wherein n is the integer more than 0；
(4) longitudinally disposed second rod iron on the upside of the concrete prism of topmost, the method to set up of described second rod iron is: if concrete prism has even number root, the most described second rod iron is arranged at described first straight line；If concrete prism has odd number root, the most described second rod iron is arranged at described second straight line, and arranges rigidity force transmission beam between described second rod iron and matrix packing washer, to transmit, to described second rod iron, the pressure that described matrix packing washer applies；Then it is inserted in, in each matrix pull bar two upper end, the matrix packing washer connected as one, to be pushed down the concrete prism of topmost by described second rod iron；
(5) it is inserted in Washer-type Presure Sensor, packing washer, stage clip and packing washer respectively in each matrix pull bar two upper end, and screws in threaded fastener and lock downwards；
(6) described Washer-type Presure Sensor is connected to microcomputer control unit, to be detected the payload values size of stage clip applying by described Washer-type Presure Sensor and to adjust rod iron position；Rotate threaded fastener, the decrement of regulation stage clip, the load being sized with applying；
(7) the whole device of loaded is put in specific environmental test chamber, carry out durability test.
The loading method of concrete durability experiment under load coupling the most according to claim 7, it is characterized in that, in step (2), before stacking described first rod iron and concrete prism, the surface that described concrete prism and the first rod iron contact arranges piezoelectric type force cell；In step (3), before the second rod iron is set, the surface that described concrete prism and the second rod iron contact is also provided with piezoelectric type force cell；Described piezoelectric type force cell is connected with microcomputer control unit, to detect the stress size of each contact position；Then according to the stress size of each contact position, the degree that screws of the different threaded fastener of regulation and rod iron position, concrete prism applies uniform load so that the durability under the pure pressure of concrete or pure tension state can be tested.
The loading method of concrete durability experiment under load coupling the most according to claim 7, it is characterised in that in step (7) a metallic, monitors the change of concrete prism stress during durability test by described microcomputer control unit.
The loading method of concrete durability experiment under load coupling the most according to claim 7, it is characterised in that in step (6), according to formula F = K* l, wherein F is the required payload values applied, and K is the coefficient of elasticity of stage clip,lFor the decrement of stage clip, regulate the decrement of stage clip, thus on concrete prism, apply uniform load by the decrement of regulation stage clip.
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| CN201510267161.1A CN106290808B (en) | 2015-05-25 | 2015-05-25 | Loading device and method for concrete durability experiment under load coupling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548773A (en) * | 2018-03-30 | 2018-09-18 | 河海大学 | Detect the auxiliary device and its application method of reinforcing bar stainless property under by curved state |
| CN110702603A (en) * | 2019-12-13 | 2020-01-17 | 永一橡胶有限公司 | Uniformity detection equipment and method for tire curing bladder |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2906592Y (en) * | 2006-06-20 | 2007-05-30 | 中国建筑材料科学研究总院 | Transducer-method stress loading device |
| CN101979990B (en) * | 2010-10-15 | 2012-09-05 | 中国建筑材料科学研究总院 | Self-positioning detachable concrete durability test stress loading device |
| CN102998174A (en) * | 2011-09-09 | 2013-03-27 | 中交四航工程研究院有限公司 | Long-term loading apparatus system for concrete sample durability tests |
| CN102359931A (en) * | 2011-09-19 | 2012-02-22 | 东南大学 | Concrete fatigue load and environmental coupling experiment apparatus |
| CN103674708A (en) * | 2013-12-27 | 2014-03-26 | 大连大学 | Multi-factor coupling concrete durability study experiment loading device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548773A (en) * | 2018-03-30 | 2018-09-18 | 河海大学 | Detect the auxiliary device and its application method of reinforcing bar stainless property under by curved state |
| CN110702603A (en) * | 2019-12-13 | 2020-01-17 | 永一橡胶有限公司 | Uniformity detection equipment and method for tire curing bladder |
| CN110702603B (en) * | 2019-12-13 | 2020-06-19 | 永一橡胶有限公司 | Uniformity detection equipment and method for tire curing bladder |
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