CN103674701A - Bending load test device, application and using method thereof - Google Patents
Bending load test device, application and using method thereof Download PDFInfo
- Publication number
- CN103674701A CN103674701A CN201310654258.9A CN201310654258A CN103674701A CN 103674701 A CN103674701 A CN 103674701A CN 201310654258 A CN201310654258 A CN 201310654258A CN 103674701 A CN103674701 A CN 103674701A
- Authority
- CN
- China
- Prior art keywords
- reinforced concrete
- curved
- test block
- load
- concrete test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bending load test device, the bending load test device includes a bending load loading device, a digital instrument and a switch box, the bending load loading device comprises main body screws, main body nuts, springs, a steel plate, counterforce frames and sensors, the main body screws are symmetrically vertically arranged on two sides of the steel plate, the main body nuts are arranged on the top parts of the main body screws, the bottom ends of the main body screws are provided with the sensors, and the springs are arranged between the steel plate and the main body nuts, the counterforce frames are arranged on the outer parts of the sensors, the sensors are connected with the switch box, and the switch box is connected with the digital instrument. Accurate measurement of bending loads is realized, the whole device structure is simple, an operation method is easy to grasp, the device is used for the durability test of a reinforced concrete test block in marine environment, by a using method of the bending load test device, influences of the bending loads of different sizes on the durability of the reinforced concrete test block and influences of the different bending loads on chloride ion diffusion in the reinforced concrete test block can be contrasted.
Description
Technical field
The present invention relates to a kind of laboratory testing rig of Bridge performance, relate in particular to a kind of curved loading test device, application and using method of drawing of shop experiment test bridge.
Background technology
Along with the develop rapidly of modern science and technology, reinforced concrete structure obtains applying more and more widely because it has the advantages such as shock resistance that ductility is good, bearing capacity is high and stronger.Also just because of these advantages, make people generally believe that reinforced concrete structure has good endurance quality, over-evaluated the serviceable life of structure, ignored structure along with military service for many years and produced aging brought harm.The maintenance cost of a large amount of engineering accidents and great number, has caused the great attention of people to reinforced concrete structure durability in recent years.
The main direction of bridge reinforcement concrete structure durability research is at present inland river bridge, but a large amount of design and constructions across river Oversea bridge makes the endurance issues of works under marine environment seem particularly outstanding.And existing reinforced concrete structure durability Life Prediction Model is mainly by Fick's second law, less consideration is curved draws the impact of load on permanance.
Bear for a long time the curved load action that draws and can make reinforced concrete structure produce microfracture and crack is expanded, increase the rate of diffusion of chlorion and accelerate steel bar corrosion, reduce the serviceable life of structure.Therefore in the simulation laboratory test of bridge, consider that the curved load that draws just seems particularly important to the damage effect of works.
Chinese patent (CN102704400A) discloses a kind of prestress of concrete tension method, by cast-in-place girder on support, then adopts three bridging braking techniques, has shortened the stretching construction duration.
Obviously, in prior art, also there is no special test unit for solving the curved loading detection that draws of reinforced concrete, and for curved research of drawing load to affect the serviceable life of reinforced concrete under marine environment.
Because above-mentioned existing curved defect of drawing test unit, application and the using method existence of load, the inventor is based on being engaged in this type of product design manufacture abundant practical experience and professional knowledge for many years, and the utilization of cooperation scientific principle, positive research and innovation in addition, to founding a kind of Novel bent, draw test unit, application and the using method of load, through constantly research, design, and after repeatedly studying sample and improving, finally create the present invention who has practical value.
Summary of the invention
Fundamental purpose of the present invention is, overcome existing curved defect of drawing test unit, application and the using method existence of load, and the test unit, application and the using method that provide a kind of Novel bent to draw load, detect the curved impact of load on reinforced concrete of drawing, improve and detect degree of accuracy, thereby be more suitable for practicality, and there is the value in industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of curved test unit that draws load proposing according to the present invention, comprise the curved load charger that draws, digital instrument and switch box, the described curved load charger that draws comprises body screw, main body nut, spring, steel plate, reaction frame and inductor, symmetria bilateralis on described steel plate is vertically installed with body screw, the top of described body screw is provided with main body nut, the bottom of described body screw is provided with inductor, between described steel plate and described main body nut, be provided with spring, described inductor outer setting has reaction frame, described inductor is connected with described switch box, described switch box is connected with described digital instrument.
Enough even in order to guarantee the curved load that draws loading, the aforesaid curved test unit that draws load, described both ends of the spring is respectively arranged with cushion block.
The aforesaid curved test unit that draws load, described detected reinforced concrete test block is arranged between described spring and steel plate.
In order better to guarantee the stability of detected reinforced concrete test block, the aforesaid curved test unit that draws load, is provided with for supporting the rod iron of described detected reinforced concrete test block between described steel plate and detected reinforced concrete test block.
By the aforesaid curved test unit that draws load for detection of the different curved impacts of load intensity on chloride permeability of drawing under bar in chlorine salt solution.
Aforesaid curved test unit using method of drawing load, the method comprises the steps,
(1) moulding reinforced concrete test block: moulding reinforced concrete test block in grinding tool;
(2) loading of reinforced concrete test block: the reinforced concrete test block of moulding is fixed between described main body nut and steel plate, and described reinforced concrete test block is loaded to the curved load of drawing;
(3) blocking test: after described reinforced concrete test block has loaded, by the side epoxy resin sealing of described reinforced concrete test block;
(4) simulation test: the good reinforced concrete test block of step (3) pre-service is placed on and carries out simulation test in indoor briny environment;
(5) detect: remove described epoxy resin, by described reinforced concrete test block abrasive dust, measure the chlorion percentage composition in powder sample;
In order to guarantee that reinforced concrete test block can not ftractureed in loading procedure, aforesaid curved test unit using method of drawing load, described step (2) applies, and the curved load that draws is 0.15 times, 0.30 times and 0.50 times of reinforced concrete test block rupture strength.
Aforesaid curved test unit using method of drawing load, the test block of described moulding reinforced concrete comprises two kinds of sizes of prism test specimen of 150mm * 150mm * 515mm and 100mm * 100mm * 400mm.
Aforesaid curved test unit using method of drawing load, the prism test specimen of described 100mm * 100mm * 400mm is used for the rupture strength of tested steel reinforced concrete test block.
In order to guarantee that reinforced concrete test block can not ftractureed in loading procedure, aforesaid curved test unit using method of drawing load, described in the curved load of drawing that applies be not more than 450KN.
By technique scheme, curved test unit, application and the using method of load of drawing of the present invention at least has following advantages:
The curved test unit that draws load of the present invention, by inductor and digital instrument are set, realized curved accurate measurement of drawing load, whole apparatus structure is fairly simple, method of operating is easily grasped, and suitable staff is at the curved weight bearing power that draws of bearing of indoor detection reinforced concrete test block; Apply the apparatus to the permanance of tested steel reinforced concrete test block under marine environment; Apply the method for this device, can contrast the curved of different sizes and draw the impact of load on reinforced concrete test block structure durability, and different curved impacts of drawing load to spread chlorion in reinforced concrete test block.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention, is described in detail as follows.
figure of description
Figure 1 shows that the curved test unit structural representation that draws load of the present invention;
Figure 2 shows that inductor of the present invention and reaction frame syndeton schematic diagram;
Figure 3 shows that sensor structure schematic diagram of the present invention;
Reference numeral implication is as follows: 1-body screw; 2-main body nut; 3-cushion block; 4-spring; The test block of 5-reinforced concrete; 6-rod iron; 7-steel plate; 8-nut; 9-inductor; 10-assists screw rod; 11-reaction frame; 12-switch box; 13-digital instrument; 14-plug.
Embodiment
For further setting forth the present invention, reach technological means and the effect that predetermined goal of the invention is taked, curved its embodiment of test unit, application and using method, feature and the effect thereof of drawing load to proposing according to the present invention, is described in detail as follows.
The curved test unit structural representation that draws load of the present invention as shown in Figure 1, comprise the curved load charger that draws, digital instrument 13 and switch box 12, the curved load charger that draws comprises body screw 1, main body nut 2, cushion block 3, spring 4, rod iron 6, steel plate 7, nut 8, auxiliary screw rod 10, reaction frame 11 and inductor 9, body screw 1 connects main body nut 2 and is connected with inductor 9 through steel plate 7, the outer setting of inductor 9 has reaction frame 11, main body nut 2 bottoms are provided with spring 4, the two ends of its medi-spring 4 are respectively arranged with cushion block 3, reinforced concrete test block 5 is arranged on the steel plate 7 that thickness is 10mm, between its light plate 7 and reinforced concrete examination 5, the rod iron 6 that two diameters are 10mm is set, steel plate 7 lower surfaces are connected with reaction frame 11, wherein the lower end attaching nut 8 of body screw 1 fixes with reaction frame 11.Wherein the lower end of inductor 9 is fixed on reaction frame 11 by auxiliary screw rod 10.Wherein the curved load charger that draws is symmetrical structure.Inductor 9 is connected with switch box 12 by wire, and switch box 12 connects digital instrument 13, and digital instrument 13 switches on power by plug 14.
Apply the curved test unit that draws load shown in Fig. 1 of the present invention, for detection of the different curved impacts of load intensity on chloride permeability of drawing under bar in chlorine salt solution.
The operation steps of application apparatus of the present invention is as follows:
(1) moulding reinforced concrete test block 5; Compact dimensions is 150mm * 150mm * 515mm and is of a size of the prism reinforced concrete test block 5 of 100mm * 100mm * 400mm respectively, the rupture strength of reinforced concrete test block 5 when the prism reinforced concrete test block 5 that is wherein of a size of 100mm * 100mm * 400mm is used for testing the 28 day length of time;
(2) the reinforced concrete test block 5 of moulding is fixed on to curved steel plate 7 tops of drawing in load charger, applies respectively the constant curved load that draws; The constant curved load that draws applying is respectively 0.15,0.30 and 0.50 times of reinforced concrete test block 5 rupture strengths; Wherein reinforced concrete test block 5 intensity are not more than C50;
(3), after reinforced concrete test block 5 has loaded, by the side epoxy resin sealing of reinforced concrete test block, chlorion is permeated in concrete from the exposure of reinforced concrete test block;
(4) the good reinforced concrete test block 5 of step (3) pre-service is positioned over to indoor briny environment simulation test Xiang Langjian district and carries out test, extremely the test of regulation during the length of time is taken out reinforced concrete test block 5;
(5) remove the epoxy resin of reinforced concrete test block 5 parcels, abrasive dust, measures the chlorion percentage composition in powder sample;
(6) according to Fick's 2nd law of diffusion, the chlorion percentage composition in different depth place reinforced concrete test block 5 is carried out to nonlinear fitting, can obtain the coefficient of diffusion of chlorion in reinforced concrete; For curved, draw load reinforced concrete test block 5, sampling point is only the tensile region of reinforced concrete test block 5 simple bending sections.
By above-mentioned test, just can obtain different curved impacts of drawing load to spread the interior chlorion of reinforced concrete test block 5.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a curved test unit that draws load, comprise the curved load charger that draws, digital instrument and switch box, it is characterized in that: the described curved load charger that draws comprises body screw, main body nut, spring, steel plate, reaction frame and inductor, symmetria bilateralis on described steel plate is vertically installed with body screw, the top of described body screw is provided with main body nut, the bottom of described body screw is provided with inductor, between described steel plate and described main body nut, be provided with spring, described inductor outer setting has reaction frame, described inductor is connected with described switch box, described switch box is connected with described digital instrument.
2. the curved test unit that draws load according to claim 1, is characterized in that: described both ends of the spring is respectively arranged with cushion block.
3. the curved test unit that draws load according to claim 1, is characterized in that: described detected reinforced concrete test block is arranged between described spring and steel plate.
4. the curved test unit that draws load according to claim 3, is characterized in that: between described steel plate and detected reinforced concrete test block, be provided with for supporting the rod iron of described detected reinforced concrete test block.
5. curved described in claim 1 ~ 4 any one drawn the test unit of load for detection of the different curved impacts of load intensity on chloride permeability of drawing under bar in chlorine salt solution.
6. curved test unit using method of drawing load according to claim 5, is characterized in that: the method comprises the steps,
(1) moulding reinforced concrete test block: moulding reinforced concrete test block in grinding tool;
(2) loading of reinforced concrete test block: the reinforced concrete test block of moulding is fixed between described main body nut and steel plate, and described reinforced concrete test block is loaded to the curved load of drawing;
(3) blocking test: after described reinforced concrete test block has loaded, by the side epoxy resin sealing of described reinforced concrete test block;
(4) simulation test: the good reinforced concrete test block of step (3) pre-service is placed on and carries out simulation test in indoor briny environment;
(5) detect: remove described epoxy resin, by described reinforced concrete test block abrasive dust, measure the chlorion percentage composition in powder sample.
7. curved test unit using method of drawing load according to claim 6, is characterized in that: described step (2) applies, and the curved load that draws is 0.15 times, 0.30 times and 0.50 times of reinforced concrete test block rupture strength.
8. curved test unit using method of drawing load according to claim 6, is characterized in that: the test block of described moulding reinforced concrete comprises two kinds of sizes of prism test specimen of 150mm * 150mm * 515mm and 100mm * 100mm * 400mm.
9. curved test unit using method of drawing load according to claim 8, is characterized in that: the prism test specimen of described 100mm * 100mm * 400mm is used for the rupture strength of tested steel reinforced concrete test block.
10. curved test unit using method of drawing load according to claim 6, is characterized in that: described in the curved load of drawing that applies be not more than 450KN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310654258.9A CN103674701A (en) | 2013-12-05 | 2013-12-05 | Bending load test device, application and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310654258.9A CN103674701A (en) | 2013-12-05 | 2013-12-05 | Bending load test device, application and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103674701A true CN103674701A (en) | 2014-03-26 |
Family
ID=50312919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310654258.9A Pending CN103674701A (en) | 2013-12-05 | 2013-12-05 | Bending load test device, application and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103674701A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181175A (en) * | 2018-02-01 | 2018-06-19 | 塔里木大学 | A kind of device and method for testing eccentric tension concrete durability |
| CN109115593A (en) * | 2018-08-31 | 2019-01-01 | 中国兵器工业第五九研究所 | Marine climate environment-tensile, compressive, bending load coupling test equipment and test method |
| CN113533025A (en) * | 2021-07-22 | 2021-10-22 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050114571A (en) * | 2004-06-01 | 2005-12-06 | 허정도 | A penetration testing equipment, a property measuring method and a specimen preparation method for roadway pavement materials |
| CN101699267A (en) * | 2009-10-21 | 2010-04-28 | 河海大学 | Loading device for testing concrete chloride ion permeability by coulometry and testing method thereof |
| CN102621049A (en) * | 2012-01-16 | 2012-08-01 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
-
2013
- 2013-12-05 CN CN201310654258.9A patent/CN103674701A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050114571A (en) * | 2004-06-01 | 2005-12-06 | 허정도 | A penetration testing equipment, a property measuring method and a specimen preparation method for roadway pavement materials |
| CN101699267A (en) * | 2009-10-21 | 2010-04-28 | 河海大学 | Loading device for testing concrete chloride ion permeability by coulometry and testing method thereof |
| CN102621049A (en) * | 2012-01-16 | 2012-08-01 | 河海大学 | Concrete chloride ion migration coefficient load testing device under bending stress, and testing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王明军: "荷载与裂缝对海工混凝土渗透性的影响研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 6, 15 June 2012 (2012-06-15) * |
| 邓春林等: "考虑荷载影响的桥梁混凝土结构耐久性设计", 《世界桥梁》, vol. 41, no. 1, 28 February 2013 (2013-02-28) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181175A (en) * | 2018-02-01 | 2018-06-19 | 塔里木大学 | A kind of device and method for testing eccentric tension concrete durability |
| CN108181175B (en) * | 2018-02-01 | 2024-03-08 | 塔里木大学 | Device and method for testing durability of eccentric tension concrete |
| CN109115593A (en) * | 2018-08-31 | 2019-01-01 | 中国兵器工业第五九研究所 | Marine climate environment-tensile, compressive, bending load coupling test equipment and test method |
| CN113533025A (en) * | 2021-07-22 | 2021-10-22 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
| CN113533025B (en) * | 2021-07-22 | 2022-12-20 | 燕山大学 | Loading device for durability test of concrete member and measuring method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | Experimental study on fatigue performance of UHPC-orthotropic steel composite deck | |
| US10620085B2 (en) | Bridge inspection and evaluation method based on impact vibration | |
| CN101699267B (en) | Loading device for testing concrete chloride ion permeability by coulometry and testing method thereof | |
| CN105954103B (en) | Ground surface material stretching, compression, curved drawing modulus of resilience synchronous testing device and method | |
| CN102519871B (en) | Method and device for measuring bonding strength between reinforcing steel and concrete under action of pre-stress | |
| CN101281189A (en) | Cement base material permanent load composite corrosion test instrument | |
| CN110031312B (en) | In-situ testing method for mechanical property of rusted prestressed tendon | |
| CN103674701A (en) | Bending load test device, application and using method thereof | |
| CN105651474A (en) | On-beam beam transporting simulation loading test method for prestressed concrete full-hole prefabricated box beam | |
| Li et al. | Creep model of high-strength high-performance concrete under cyclic loading | |
| CN102680573B (en) | Timber vibration property tester based on uniform force knocking method | |
| CN109522571A (en) | A kind of concrete fatigue deformation evolution model based on Weibull equation | |
| CN207623214U (en) | A kind of change gradient cement pavement accelerated loading abrasion tester | |
| CN205636839U (en) | Horizontal static test's of horizontal bearing stake single pile loading counterforce device | |
| CN203132856U (en) | Static-load anchoring experiment device | |
| CN107621403B (en) | A method of acquisition buried concrete true mechanical property and this structure after by sulfate attack | |
| RU2782331C1 (en) | Method for determining the durability and long-term strength of polymer composite materials under load | |
| Reissen et al. | Numerical investigations on the shear capacity of reinforced concrete slabs under concentrated loads | |
| RU2523057C1 (en) | Device for fatigue assessment of asphalt concrete under cyclic dynamic impacts | |
| CN202599916U (en) | Non-destructive testing exciting device for wood and woodiness composite materials based on uniform force knocking | |
| Zhao et al. | Nondestructive testing and static/dynamic loading detection of old slab for bridge widening | |
| Brodňan et al. | Evaluation of Material Properties of the Arch Bridge in Krásno nad Kysucou | |
| RU132891U1 (en) | LOAD UNIT FOR INSTALLATION TESTING MATERIALS | |
| Zhao et al. | Experimental study on reinforced hollow beam with carbon fiber reinforced polymer and external prestressed strand | |
| Shi et al. | Study on load test of 100m cross-reinforced deck type concrete box arch bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 211112, honesty Road, Nanjing Science Park, Jiangning District, Jiangsu, 2200 Applicant after: Jiangsu TRI Address before: 211112, honesty Road, Nanjing Science Park, Jiangning District, Jiangsu, 2200 Applicant before: JIANGSU JIAOKE ENGINEERING TESTING TECHNOLOGY CO., LTD. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: JIANGSU JIAOKE ENGINEERING TESTING TECHNOLOGY CO., LTD. TO: JIANGSU TRANSPORTATION RESEARCH INSTITUTE CO., LTD. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |