CN103376222A - Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon - Google Patents
Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon Download PDFInfo
- Publication number
- CN103376222A CN103376222A CN2013101599294A CN201310159929A CN103376222A CN 103376222 A CN103376222 A CN 103376222A CN 2013101599294 A CN2013101599294 A CN 2013101599294A CN 201310159929 A CN201310159929 A CN 201310159929A CN 103376222 A CN103376222 A CN 103376222A
- Authority
- CN
- China
- Prior art keywords
- stretching
- screw thread
- frp muscle
- end plate
- ground tackle
- 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
Abstract
The invention discloses a constant-temperature stress corrosion testing device and method for an FRP (fiber reinforced polymer) tendon. The device comprises a stretch-draw frame, threaded anchors, a three-way pipe, a spring, a counter force frame, a lifting jack, a force sensor and a stretch-draw anchor rod. Certain stretch-draw stress is applied to the FRP tendon by utilizing the stretch-draw frame, the counter force frame, the lifting jack and the force sensor, and the FRP tendon is fixed by a nut, and the stress loss is compensated by the compression spring, and the constant stress level can be kept for a long time. A corrosion solution soaking environment is provided through a method that a corrosion solution is filled into a home-made PVC pipe device fixed in the middle of the FRP tendon, so that the FRP tendon is in the corrosion solution soaking environment for a long time. After the corrosion solution is filled completely and the prestress is stretched and drawn, the whole stretch-draw frame for stretching and drawing the FRP tendon is put into a constant-temperature constant-humidity test box so as to guarantee the long-term constant-temperature environment. After the constant-temperature corrosion, the device is unloaded through the steps the same with the stretch-draw step, the FRP tendon is taken down for a stretch test. The method comprises the following steps of: anchoring the FRP tendon, fixing through stretching and drawing, corroding at constant temperature, unloading and carrying out the stretch-draw test.
Description
Technical field
The invention belongs to compound substance long-term mechanical property test method technical field, be specifically related to a kind of FRP muscle constant temperature stress corrosion testing device and method.
Background technology
Resin base fiber reinforced composite material (Fiber Reinforced Polymer is called for short FRP) is the high performance material by fibrous material and matrix material mix according to a certain percentage and the certain technique of process is compounded to form.This material came out in the forties in 20th century, originally was used for the high-tech areas such as Aeronautics and Astronautics, national defence, was widely used in fields such as automobile, chemical industry, medical science gradually afterwards.In recent years,, lightweight high-strength with it, the advantage such as corrosion-resistant, beginning is used widely in civil engineering structure, and is subject to the extensive concern of engineering circles.
The FRP muscle is because its good decay resistance becomes a kind of approach that replaces reinforcing bar to solve the steel bar corrosion problem in specific environment.But because that the FRP material is used for civil engineering work history is shorter, the check achievement of permanance in Practical Project is rare, and the research of its endurance quality is seemed particularly important.The FRP muscle is in the complex environment of multiple unfavorable factor coupling in the civil engineering work practical application, and present stage most of test simulation environment more single, can not reflect well actual conditions.How better simulating actual conditions is considered the coupling between the various factors simultaneously, becomes the problem of present urgent need research.
The corrosion of the FRP muscle influence factor that is corroded environment comprises in actual applications: temperature, etchant solution kind, humidity, stress level etc.The Study on Durability that directly is immersed in the etchant solution for the FRP muscle at present is more, and etchant solution environment and stress coupling be because the test unit complexity, so study lessly, and this is the state of necessary being in the work of FRP muscle.Existing research is difficult for moving because test unit generally uses gravity control stress constant, and by mechanical-force-transmission, it is large to install complicated volume, control temperature constant difficulty, and temperature is the key factor that affects FRP muscle corrosion speed.The general muscle material of muscle material corrosion test quantity is large, and the test period is long, so claimed apparatus is simply light.
Therefore, therefore need a kind of FRP muscle constant temperature stress corrosion (cracking) test method to address the above problem.
Summary of the invention
Goal of the invention: the present invention the problem that exists for prior art, provide a kind of and can make the FRP muscle guarantee for a long time steady temperature, constant tension stress and be in the FRP muscle constant temperature stress corrosion testing device that etchant solution soaks environment.
Technical scheme: for realizing above-mentioned technical matters, the technical solution used in the present invention is:
A kind of FRP muscle constant temperature stress corrosion testing device is characterized in that, comprises stretching rack, the first screw thread ground tackle, the second screw thread ground tackle, three-way pipe, spring, the 3rd end plate, reaction frame, lifting jack, power sensor and stretching anchor rod,
Described stretching rack comprises support bar, the first end plate and the second end plate, and described the first end plate and described the second end plate are separately positioned on the two ends of described support bar, is respectively arranged with the first through hole and the second through hole on described the first end plate and described the second end plate; Be provided with third through-hole on described the 3rd end plate; The FRP muscle is arranged between described the first end plate and described the second end plate, and the two ends of FRP muscle connect respectively an end of described the first screw thread ground tackle and an end of described the second screw thread ground tackle; The other end of described the first screw thread ground tackle stretches out described stretching rack by described the first through hole, and the part that described the first screw thread ground tackle stretches out described stretching rack is provided with the first nut, and described the second screw thread ground tackle stretches out described stretching rack by described the second through hole; Described three-way pipe is enclosed within on the test section of FRP muscle;
Described the 3rd end plate is arranged on a side of described the second end plate, be provided with described spring between described the second end plate and described the 3rd end plate, described reaction frame is arranged on a side of described the 3rd end plate, described reaction frame is provided with opening near an end of described the 3rd end plate, described opening is less than described the 3rd end plate, the other end of described reaction frame is provided with fourth hole, described the second screw thread ground tackle stretches into described reaction frame by described third through-hole and opening, the part that described the second screw thread ground tackle stretches into described reaction frame is provided with the second nut, described stretching anchor rod stretches into described reaction frame by described fourth hole, and the end that described the second screw thread ground tackle stretches into described reaction frame connects described stretching anchor rod; Described reaction frame has described lifting jack away from described stretching rack one end arranged outside, and an end of described lifting jack is provided with described power sensor, and described lifting jack all is enclosed within on the described stretching anchor rod and with described stretching anchor rod with the power sensor and is fixedly connected with.
Further, described support bar is angle steel.
Further, described three-way pipe is the PVC three-way pipe.
Further, also comprise coupling sleeve, described the second screw thread ground tackle connects described stretching anchor rod by described coupling sleeve.For convenience detach.
Further, described lifting jack and power sensor all are connected with described stretching anchor rod by the 3rd nut.Mount and dismount all more convenient.
Further, also comprise stiffening plate, the junction of the first end plate and the second end plate and support bar is provided with stiffening plate.
Further, tension bracket is shaped as rectangular parallelepiped.In order to realize that more easily the device after a collection of stretch-draw is in same steady temperature, device volume must be enough small and exquisite, can put into constant temperature oven, and conveniently stack.So stretching rack is designed to rectangular shape, be convenient to carry and stack.This device conveniently moves and has no adverse effect for the muscle material.
Beneficial effect: compared with prior art, FRP muscle constant temperature stress corrosion testing device of the present invention is simple in structure, easy to make, designed and produced a kind of stretching rack, utilize this stretching rack, reaction frame, lifting jack and power sensor that the FRP muscle is applied certain tension stress, fix with nut, and use the spring-compensating stress loss, can keep for a long time the constant stress level.Etchant solution soaks environment to be provided by the method for filling with etchant solution in the three-way pipe that is fixed on FRP muscle test section, solution usage is little, but guarantee that muscle material test section is fully immersed in the etchant solution environment all the time, can make the FRP muscle be in for a long time etchant solution and soak under the environment.
The invention also discloses a kind of FRP muscle constant temperature stress corrosion (cracking) test method.
FRP muscle constant temperature stress corrosion (cracking) test method of the present invention adopts FRP muscle constant temperature stress corrosion testing device as above, may further comprise the steps:
1), three-way pipe is enclosed within on the test section of FRP muscle, the two ends of FRP muscle connect respectively the first screw thread ground tackle and the second screw thread ground tackle, and then with the closed at both ends of three-way pipe, the sidewall opening of three-way pipe up;
2), the first screw thread ground tackle is fixedly connected with an end of stretching rack, the second screw thread ground tackle is connected stretching anchor rod, utilize jack pair FRP muscle to carry out stretch-draw, and utilize the force sensor measuring stretching force, when stretching force reaches predetermined value, by the second nut the second screw thread ground tackle is fixedly connected with the 3rd end plate;
3), pour into etchant solution from the sidewall opening of three-way pipe after, sidewall opening is sealed;
4), stretching rack is put into constant temperature oven, within predetermined corrosion length of time, keep steady temperature;
5), when predetermined corrosion finishes the length of time, stretching rack is taken out from constant temperature oven, the FRP muscle is taken off from stretching rack, remove the three-way pipe on the FRP muscle, the FRP muscle is carried out tension test.
Further, the FRP muscle connects the first screw thread ground tackle and the second screw thread ground tackle concrete grammar for to be anchored in the first screw thread ground tackle and the second screw thread ground tackle with the two ends of adhesive glue with the FRP muscle in the step 1).
Further, in the step 5) with the FRP muscle from the concrete steps that stretching rack takes off be:
A, at described stretching rack or the 3rd end plate one side described reaction frame is set, described reaction frame is provided with opening near an end of described stretching rack, described reaction frame is provided with fourth hole away from an end of described stretching rack, described reaction frame has described lifting jack away from described stretching rack one end arranged outside, described stretching anchor rod stretches into described reaction frame by described fourth hole, the end that described the first screw thread ground tackle or the second screw thread ground tackle stretch into described reaction frame connects described stretching anchor rod, and described lifting jack is enclosed within on the described stretching anchor rod and with described stretching anchor rod and is fixedly connected with;
B, utilize described lifting jack by described stretching anchor rod described the first screw thread ground tackle or the second screw thread ground tackle to be applied power, after described the first nut or the second nut are lax, unload described the first nut or the second nut, thereby described FRP muscle is taken off from described stretching rack.
Further, step 2) after the end reaction frame, lifting jack, power sensor and stretching anchor rod are all pulled down.
Beneficial effect: compared with prior art, FRP muscle constant temperature stress corrosion (cracking) test method of the present invention utilizes stretching rack, reaction frame, lifting jack and power sensor that the FRP muscle is applied certain tension stress, fix with nut, and compensate stress loss with Compress Spring, can keep for a long time the constant stress level.
Etchant solution soaks environment by the homemade FRP muscle middle part pvc pipe device that is fixed on, and the method for interior filling etchant solution provides, and can make the FRP muscle be in for a long time etchant solution and soak under the environment.
In etchant solution perfusion after the complete and stretch-draw prestressing force, with whole rubbish the stretching rack device of FRP muscle put into constant temperature humidity chamber, to guarantee long-term stationary temperature environment.
Description of drawings
Fig. 1 is the stereographic map of stretching rack of the present invention;
Fig. 2 is the front view of stretching rack of the present invention;
Fig. 3 is the vertical view of stretching rack of the present invention;
Fig. 4 is the left view of stretching rack of the present invention;
Fig. 5 is the structural representation of FRP muscle constant temperature stress corrosion testing device of the present invention;
Fig. 6 is the structural representation that the FRP muscle is applied the stretching rack of other devices of dismantling behind the stretching force;
Fig. 7 is the process flow diagram of FRP muscle constant temperature stress corrosion (cracking) test method of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
See also Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, FRP muscle constant temperature stress corrosion testing device of the present invention comprises stretching rack 1, the first screw thread ground tackle 31, the second screw thread ground tackle 32, three-way pipe 4, spring 6, the 3rd end plate 7, reaction frame 8, lifting jack 10, power sensor 11 and stretching anchor rod 12.
Wherein, stretching rack 1 comprises support bar 111, the first end plate 121, the second end plate 122 and stiffening plate 13.Stretching rack 1 of the present invention is used for providing the counter-force of stretching process, and keeps the stress level of FRP muscle invariable in the test of long duration process, has enough rigidity and load-bearing capacity.Stretching rack 1 material is steel, and each several part forms by welding assembly, and concrete size and parameter designing are as follows: according to the muscle material test section length of defined in the test standard of the muscle material of institute's stretch-draw, and leave certain leeway to determine.The test section length relevant with muscle material diameter (ACI 440.3R-04 standard is got 40d) of general FRP muscle considers that stretching rack can have widely applicability, and desirable length is 450mm-500mm.Stretching rack in this scope can be used for the FRP muscle of stretch-draw diameter dimension commonly used; The first end plate and the second end plate are stretch-draw and the fixing vitals of muscle material.End plate center perforate can be passed ground tackle and muscle material, can block again the fixedly nut of usefulness.The end plate size need be through partial pressing's load-bearing capacity checking computations; Support bar is an angle steel, and its rigidity and load-bearing capacity have directly determined the size of the stretching force that can bear; At the angle steel two ends stiffening plate is set, strengthens rigidity and the stability of strut.Stretching rack 1 be shaped as rectangular parallelepiped.In order to realize that more easily the device after a collection of stretch-draw is in same steady temperature, device volume must be enough small and exquisite, can put into constant temperature oven, and conveniently stack.So stretching rack is designed to rectangular shape, be convenient to carry and stack.This device conveniently moves and has no adverse effect for the muscle material.Support bar 111 is angle steel.The first end plate 121 and the second end plate 122 are separately positioned on the two ends of support bar 111, the junction of the first end plate 121 and the second end plate 122 and support bar 111 is provided with on stiffening plate 13, the first end plates 121 and the second end plate 122 and is respectively arranged with the first through hole and the second through hole.FRP muscle 2 is arranged between the first end plate 121 and the second end plate 122, and the two ends of FRP muscle 2 connect respectively an end of the first screw thread ground tackle 31 and an end of the second screw thread ground tackle 32; The other end of the first screw thread ground tackle 31 stretches out part that stretching rack 1, the first screw thread ground tackle 31 stretches out stretching rack 1 by the first through hole and is provided with the first nut 51, the second screw thread ground tackles 32 and stretches out stretching rack 1 by the second through hole.Three-way pipe 4 is the PVC three-way pipe, is enclosed within on the FRP muscle 2.Wherein, be provided with third through-hole on the 3rd end plate 7, the 3rd end plate 7 is arranged on a side of the second end plate 122, is provided with spring 6 between the second end plate 122 and the 3rd end plate 7.In order to guarantee enough bearing capacity and stiffness, the stability after the second through hole and the third through-hole of the second end plate 122 and the 3rd end plate 7 are respectively established one all around, kept compressing.
Wherein, reaction frame 8 is channel-section steel, is arranged on a side of the 3rd end plate 7, and an end withstands on the 3rd end plate 7, and the other end provides counter-force for lifting jack 10.Reaction frame 8 is provided with opening near an end of the 3rd end plate 7, and opening is less than the 3rd end plate 7, and the other end of reaction frame 8 is provided with fourth hole.The second screw thread ground tackle 32 stretches into reaction frame 8 by third through-hole and opening, the part that the second screw thread ground tackle 32 stretches into stretching rack 1 is provided with the second nut 52, stretching anchor rod 12 stretches into reaction frame 8 by fourth hole, the end that the second screw thread ground tackle 32 stretches into reaction frame 8 connects stretching anchor rod 12, wherein, also comprise coupling sleeve 9, the second screw thread ground tackle 32 connects stretching anchor rod 12 by coupling sleeve 9, for convenience detach, coupling sleeve 9 is used for connecting the second screw thread ground tackle and the stretching anchor rod 12 of FRP muscle stretching end.Reaction frame 8 has lifting jack 10 away from stretching rack 1 one end arranged outside, one end of lifting jack 10 arranges strong sensor 11, lifting jack 10 all is enclosed within on the stretching anchor rod 12 and with stretching anchor rod 12 with power sensor 11 and is fixedly connected with, power sensor 11 is used for reading the pulling force that lifting jack applies, and its pulling force numerical value shows by connecting the dynamometry instrument.Lifting jack 10 is connected with the power sensor and is connected with stretching anchor rod 12 by the 3rd nut 53.Mount and dismount all more convenient.
Compared with prior art, FRP muscle constant temperature stress corrosion testing device of the present invention is simple in structure, easy to make, designed and produced a kind of stretching rack, utilize this stretching rack, reaction frame, lifting jack and power sensor that the FRP muscle is applied certain tension stress, fix with nut, and use the spring-compensating stress loss, can keep for a long time the constant stress level.Etchant solution soaks environment to be provided by the method for filling with etchant solution in the three-way pipe that is fixed on FRP muscle test section, solution usage is little, but guarantee that muscle material test section is fully immersed in the etchant solution environment all the time, can make the FRP muscle be in for a long time etchant solution and soak under the environment.
FRP muscle constant temperature stress corrosion (cracking) test method of the present invention adopts FRP muscle constant temperature stress corrosion testing device as above, and FRP muscle constant temperature stress corrosion (cracking) test method of the present invention can be divided into two parts: FRP muscle material is applied tension stress and is immersed in the etchant solution.The former applies tension stress to the muscle material with lifting jack on stretching rack, then be fixed on the rubbish frame with nut; Latter is to be through on the FRP muscle material test section with three-way pipe, and is to be tensioned three-way pipe is sealed at both ends after complete, injects etchant solution in the three-way pipe to realize the corrosion of FRP muscle material is soaked.May further comprise the steps:
1), three-way pipe 4 is enclosed within on the test section of FRP muscle 2, the two ends of FRP muscle 2 connect respectively the first screw thread ground tackle 31 and the second screw thread ground tackle 32, and then with the closed at both ends of three-way pipe 4, three ports of three-way pipe 4 up; Three-way pipe of the present invention is the PVC three-way pipe, adopts pvc pipe and threeway to be made, and the pvc pipe of suitable diameter is cut into two sections, middlely links to each other with supporting threeway, and is bonded to integral body with the glue of pvc pipe special use, and the assurance bonding part is water-tight.The PVC three-way pipe assembly that assembles is positioned over dry place treats that glue becomes dry; With adhesive glue FRP muscle material one end is anchored in the first screw thread ground tackle 31, be positioned over dry indoor 1-2 days, glue to be bonded solidifies fully, PVC three-way pipe assembly is through the test section of FRP muscle material, and in kind the anchoring FRP muscle material other end and the second screw thread ground tackle 32, need take measures to make muscle material centering during anchoring; PVC three-way pipe assembly is moved to FRP muscle material test section middle part, (threeway is opening up) also fixed with sealant sealing in its two ends, the PVC three-way pipe assembly of good seal need to be indoor placement 1-2 days of drying, so that fluid sealant solidifies;
2), the first screw thread ground tackle 31 is fixedly connected with an end of stretching rack 1, the second screw thread ground tackle 32 is connected stretching anchor rod 12, utilize 10 pairs of FRP muscle of lifting jack 2 to carry out stretch-draw, and utilize power sensor 11 to measure stretching force, when stretching force reaches predetermined value, by the second nut 52 the second screw thread ground tackle 32 is fixedly connected with the 3rd end plate 7, then reaction frame 8, lifting jack 10, power sensor 11 and stretching anchor rod 12 is all pulled down.Concrete: the first through hole and second through hole that will pass stretching rack the first end plate 121 and the second end plate 122 centres through the first screw thread ground tackle 31 and the second screw thread ground tackle 32 at the ready FRP muscle of step 1) material two ends, the end that the first screw thread ground tackle 31 stretches out stretching rack 1 puts the first nut 51 and tightens, and the end that the second screw thread ground tackle 32 stretches into reaction frame 8 couples together by coupling sleeve 9 and stretching anchor rod 12.After tightening coupling sleeve 9, on stretching anchor rod 12, put successively reaction frame 8, lifting jack 10 and sensor 11 and corresponding pad, and tighten the 3rd nut 53 fixed positions in sensor 11 outsides, and spring 6 is placed between the second end plate 122 and the 3rd end plate 7, put the position well.Lifting jack 10 is connected with oil hand pump, manually stretch-draw, and power sensor 11 connected the stretching force value that dynamometry instrument indication power sensors are measured.After being stretched to predetermined value, tighten the second nut 52 in the reaction frame 8.
3), pour into etchant solution from the sidewall opening of three-way pipe 4 after, sidewall opening is sealed; Concrete, whether the sealing of reexamining PVC three-way pipe two ends after the stretch-draw is intact, if the blow-by situation occurs, then uses the fluid sealant shutoff again.After pouring into etchant solution, pvc pipe components side wall opening with preservative film and bungee this opening is sealed.So far test specimen is ready.
4), stretching rack 1 is put into constant temperature oven, within predetermined corrosion length of time, keep steady temperature;
5), when predetermined corrosion finishes the length of time, stretching rack 1 is taken out from constant temperature oven, take the equipment identical with stretch-draw and method, shed tension stress, FRP muscle 2 is taken off from stretching rack 1.Concrete:
A, at stretching rack 1 or the 3rd end plate 7 one sides reaction frame 8 is set, reaction frame 8 is provided with opening near an end of stretching rack 1, reaction frame 8 is provided with fourth hole away from an end of stretching rack 1, reaction frame 8 has lifting jack 10 away from stretching rack 1 one end arranged outside, stretching anchor rod 12 stretches into reaction frame 8 by fourth hole, the end that the first screw thread ground tackle 31 or the second screw thread ground tackle 32 stretch into reaction frame 8 connects stretching anchor rod 12, and lifting jack 10 is enclosed within on the stretching anchor rod 12 and with stretching anchor rod 12 and is fixedly connected with;
B, utilize lifting jack 10 to apply power by 12 pairs of the first screw thread ground tackles 31 of stretching anchor rod or the second screw thread ground tackle 32, after the first nut 51 or the second nut 52 are lax, unload the first nut 51 or the second nut 52, thereby FRP muscle 2 is taken off from stretching rack 1.
Remove the three-way pipe 4 on the FRP muscle 2, FRP muscle 2 is carried out pulling test.Can carry out tension test after removing the PVC three-way pipe on the test section, to obtain the degradation experiment result of FRP muscle tension performance under the effect of steady temperature constant stress and etchant solution.
In above-mentioned process of the test, more true and reliable for making the result, following points for attention are arranged:
Super stretch-draw: test operation and FRP muscle long-term stress are lax all can to cause stress loss.In order to reduce this type of error, before to every group of formal stretch-draw of muscle material, try stretch-draw.Namely the other end at stretching rack also puts reaction frame, sensor, and connect the dynamometry instrument, stretch-draw is complete unload all devices of stretching end after, observe the difference of reading of non-stretching end dynamometer meter reading and predetermined stretching force desired value, and consider the factors such as long-term stress is lax, former tension stress desired value is adjusted accordingly, surpasses stretch-draw.And when stretch-draw, hold lotus a period of time, make stress relaxation release in early stage.
The selection of anchoring bond glue: when preventing that test temperature is higher, larger creep occurs and causes stress relaxation in the adhesive glue in the screw thread ground tackle, need to be with the little adhesive glue of creep under the high temperature, and such as the polymer mortar of microdilatancy etc.
Solution is replenished: because process of the test is longer, the etchant solution in the three-way pipe may cause solution to reduce because of problems such as evaporation or seepages.To keep muscle material whole process to be immersed in the etchant solution in corrosion process, need regularly solution in the three-way pipe to be checked.As find that fluid sealant sealing place has obvious seepage, then outside shutoff, and fill etchant solution.As because evaporation causes solution to reduce, then regularly fill solution.
Inventive principle: for the characteristics of FRP muscle self, the present invention need to consider following problem: at first FRP muscle shearing strength is poor, thus generally all need to be anchored in the ground tackle, and need enough anchorage length ability stretch-draw.The present invention needs the long-term constant tension stress that keeps, so designed the first screw thread ground tackle and the second screw thread ground tackle, is fixed on the stretching rack with nut, can on the prerequisite that does not injure the FRP muscle, remain tension stress like this.The first screw thread ground tackle and the second screw thread ground tackle are so that the fixing all simple possible after stretch-draw and the stretch-draw.Need to be connected by coupling sleeve the second screw thread ground tackle with stretching anchor rod during stretch-draw, put the required device of stretch-draw at stretching anchor rod again.So only have the screw thread ground tackle could realize stretch-draw, and reliable anchoring ability be provided, and be fixed on the first-class multiple action of stretching rack after the stretch-draw.
The stretch-draw device therefor is lifting jack, so designed stretching rack and a whole set of tensioning equipment.Stretching rack need to provide the counter-force of the enough rigidity pulling force to bear the muscle material.So the stretching rack that forms with shaped steel and Plate Welding can satisfy this demand.The size of power is read by the power sensor that is connected on the lifting jack during stretch-draw, and connects dynamometry instrument demonstration reading.
Because there is stress relaxation in the FRP muscle, particularly in early stage and hot environment, spring-compensating stress relaxation is used in design, and holds lotus a period of time when stretch-draw, makes lax release in early stage, and is respond well.
The solution corrosion environment generally all adopts the FRP muscle directly is immersed in the constant temperature solution soaking box, and owing to after having added stress stretching rack is arranged, equipment is larger, and solution is unnecessary for the corrosion at the position except muscle material test section, obviously is inappropriate so the muscle material is put into solution together with stretching rack.The present invention has designed at test section fixing PVC three-way pipe, and solution usage is little, and guarantees that muscle material test section is fully immersed in the etchant solution environment all the time.
In order to realize that more easily the device after a collection of stretch-draw is in same steady temperature, device volume must be enough small and exquisite, can put into constant temperature oven, and conveniently stack.So stretching rack is designed to rectangular shape, be convenient to carry and stack.This device conveniently moves and has no adverse effect for the muscle material.
FRP muscle constant temperature stress corrosion (cracking) test method of the present invention utilizes stretching rack, reaction frame, lifting jack and power sensor that the FRP muscle is applied certain tension stress, fixes with nut, and compensates stress loss with Compress Spring, can keep for a long time the constant stress level; Etchant solution soaks environment by the homemade FRP muscle middle part pvc pipe device that is fixed on, and the method for interior filling etchant solution provides, and can make the FRP muscle be in for a long time etchant solution and soak under the environment; In etchant solution perfusion after the complete and stretch-draw prestressing force, with whole rubbish the stretching rack device of FRP muscle put into constant temperature humidity chamber, to guarantee long-term stationary temperature environment.
Claims (10)
1. FRP muscle constant temperature stress corrosion testing device, it is characterized in that, comprise stretching rack (1), the first screw thread ground tackle (31), the second screw thread ground tackle (32), three-way pipe (4), spring (6), the 3rd end plate (7), reaction frame (8), lifting jack (10), power sensor (11) and stretching anchor rod (12)
Described stretching rack (1) comprises support bar (111), the first end plate (121) and the second end plate (122), described the first end plate (121) and described the second end plate (122) are separately positioned on the two ends of described support bar (111), are respectively arranged with the first through hole and the second through hole on described the first end plate (121) and described the second end plate (122); Be provided with third through-hole on described the 3rd end plate (7); FRP muscle (2) is arranged between described the first end plate (121) and described the second end plate (122), and the two ends of FRP muscle (2) connect respectively an end of described the first screw thread ground tackle (31) and an end of described the second screw thread ground tackle (32); The other end of described the first screw thread ground tackle (31) stretches out described stretching rack (1) by described the first through hole, the part that described the first screw thread ground tackle (31) stretches out described stretching rack (1) is provided with the first nut (51), and described the second screw thread ground tackle (32) stretches out described stretching rack (1) by described the second through hole; Described three-way pipe (4) is enclosed within on the test section of FRP muscle (2);
Described the 3rd end plate (7) is arranged on a side of described the second end plate (122), be provided with described spring (6) between described the second end plate (122) and described the 3rd end plate (7), described reaction frame (8) is arranged on a side of described the 3rd end plate (7), described reaction frame (8) is provided with opening near an end of described the 3rd end plate (7), described opening is less than described the 3rd end plate (7), the other end of described reaction frame (8) is provided with fourth hole, described the second screw thread ground tackle (32) stretches into described reaction frame (8) by described third through-hole and opening, the part that described the second screw thread ground tackle (32) stretches into described reaction frame (8) is provided with the second nut (52), described stretching anchor rod (12) stretches into described reaction frame (8) by described fourth hole, and the end that described the second screw thread ground tackle (32) stretches into described reaction frame (8) connects described stretching anchor rod (12); Described reaction frame (8) has described lifting jack (10) away from described stretching rack (1) one end arranged outside, one end of described lifting jack (10) is provided with described power sensor (11), and described lifting jack (10) all is enclosed within described stretching anchor rod (12) with power sensor (11) and upward and with described stretching anchor rod (12) is fixedly connected with.
2. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that described support bar (111) is angle steel.
3. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that described three-way pipe (4) is the PVC three-way pipe.
4. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that, also comprises coupling sleeve (9), and described the second screw thread ground tackle (32) connects described stretching anchor rod (12) by described coupling sleeve (9).
5. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that described lifting jack (10) is connected 11 with the power sensor) be connected with described stretching anchor rod (12) by the 3rd nut (53).
6. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that, also comprises stiffening plate (13), and described the first end plate (121) and the second end plate (122) are provided with stiffening plate (13) with the junction of described support bar (111).
7. FRP muscle constant temperature stress corrosion testing device as claimed in claim 1 is characterized in that, described tension bracket (1) be shaped as rectangular parallelepiped.
8. a FRP muscle constant temperature stress corrosion (cracking) test method is characterized in that, adopts each FRP muscle constant temperature stress corrosion testing device of claim 1-7, may further comprise the steps:
1), three-way pipe (4) is enclosed within on the test section of FRP muscle (2), the two ends of FRP muscle (2) connect respectively the first screw thread ground tackle (31) and the second screw thread ground tackle (32), then with the closed at both ends of three-way pipe (4), the sidewall opening of three-way pipe (4) up;
2), the first screw thread ground tackle (31) is fixedly connected with an end of stretching rack (1), the second screw thread ground tackle (32) is connected stretching anchor rod (12), utilize lifting jack (10) that FRP muscle (2) is carried out stretch-draw, and utilize power sensor (11) to measure stretching force, when stretching force reaches predetermined value, by the second nut (52) the second screw thread ground tackle (32) is fixedly connected with the end plate face of reaction frame (8) near tension bracket (1);
3), pour into etchant solution from the sidewall opening of three-way pipe (4) after, with described sidewall opening sealing;
4), stretching rack (1) is put into constant temperature oven, within predetermined corrosion length of time, keep steady temperature;
5), when predetermined corrosion finishes the length of time, stretching rack (1) is taken out from constant temperature oven, FRP muscle (2) is taken off from stretching rack (1), remove the three-way pipe (4) on the FRP muscle (2), FRP muscle (2) is carried out tension test.
9. FRP muscle constant temperature stress corrosion (cracking) test method as claimed in claim 8 is characterized in that, in the step 5) with FRP muscle (2) from the concrete steps that stretching rack (1) takes off is:
A, at described stretching rack (1) or the 3rd end plate (7) one sides described reaction frame (8) is set, described reaction frame (8) is provided with opening near an end of described stretching rack (1), described reaction frame (8) is provided with fourth hole away from an end of described stretching rack (1), described reaction frame (8) has described lifting jack (10) away from described stretching rack (1) one end arranged outside, described stretching anchor rod (12) stretches into described reaction frame (8) by described fourth hole, the end that described the first screw thread ground tackle (31) or the second screw thread ground tackle (32) stretch into described reaction frame (8) connects described stretching anchor rod (12), and described lifting jack (10) is enclosed within described stretching anchor rod (12) and upward and with described stretching anchor rod (12) is fixedly connected with;
B, utilize described lifting jack (10) by described stretching anchor rod (12) described the first screw thread ground tackle (31) or the second screw thread ground tackle (32) to be applied power, after described the first nut (51) or the second nut (52) are lax, unload described the first nut (51) or the second nut (52), thereby described FRP muscle (2) is taken off from described stretching rack (1).
10. FRP muscle constant temperature stress corrosion (cracking) test method as claimed in claim 8 is characterized in that step 2) reaction frame (8), lifting jack (10), power sensor (11) and stretching anchor rod (12) are all pulled down after finishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101599294A CN103376222A (en) | 2013-05-02 | 2013-05-02 | Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101599294A CN103376222A (en) | 2013-05-02 | 2013-05-02 | Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103376222A true CN103376222A (en) | 2013-10-30 |
Family
ID=49461672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101599294A Pending CN103376222A (en) | 2013-05-02 | 2013-05-02 | Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103376222A (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515729A (en) * | 2014-12-05 | 2015-04-15 | 国家电网公司 | Fiber composite core rapid aging detection device |
| CN104614255A (en) * | 2015-01-26 | 2015-05-13 | 中国科学院金属研究所 | High-temperature axial loading stress corrosion test device |
| CN104792626A (en) * | 2015-04-21 | 2015-07-22 | 东南大学 | Experimental device of FRP rib durability under stretching stress and environment coupling effect |
| CN104807712A (en) * | 2015-05-22 | 2015-07-29 | 郑州大学 | Device and method for simultaneously testing constant-temperature stress corrosion of multiple FRP (Fiber Reinforced Polymer) reinforcements |
| CN104805841A (en) * | 2015-02-28 | 2015-07-29 | 河海大学 | FRP rib anchor rod anchoring head capable of applying prestress |
| CN104865128A (en) * | 2015-05-29 | 2015-08-26 | 福州大学 | Device and method for prestressing CFRP (Carbon Fiber Reinforced Plastics) plate in double directions in static test |
| CN106404577A (en) * | 2016-08-25 | 2017-02-15 | 江苏大学 | High temperature radial loading stress corrosion sample device |
| CN106442130A (en) * | 2016-09-09 | 2017-02-22 | 哈尔滨工程大学 | Experimental device for durability of multiple FRP (Fiber Reinforced Plastic) rebars under action of marine environment and tensile stress |
| CN106808583A (en) * | 2017-01-23 | 2017-06-09 | 山西高行液压股份有限公司 | One kind puts an adapter sleeve |
| CN106872270A (en) * | 2017-02-14 | 2017-06-20 | 辽宁省水利水电科学研究院 | A kind of metal hydrogen embrittlement sensitivity tests system |
| CN106872343A (en) * | 2017-01-24 | 2017-06-20 | 中国水利水电科学研究院 | A kind of internal balance type prestress anchorage cable stress corrosion (cracking) test system and its test method |
| CN109142201A (en) * | 2018-07-31 | 2019-01-04 | 浙江交通职业技术学院 | A kind of steel wire precisely lasting holding force accelerated corrosion experimental rig and method |
| CN109374168A (en) * | 2018-09-17 | 2019-02-22 | 武汉希萌科技有限公司 | A method of accurately using load cell in tensioning construction |
| CN109444030A (en) * | 2018-11-01 | 2019-03-08 | 东南大学 | FRP plate material/sheet material the corrosion testing apparatus and method of self-correction prestressing force angle |
| CN109540669A (en) * | 2018-12-03 | 2019-03-29 | 北京工业大学 | A kind of FRP tendons continue compression lock test device |
| CN109914253A (en) * | 2019-03-20 | 2019-06-21 | 中交路桥建设有限公司 | A kind of aerial Dock With Precision Position system and method for suspension bridge girder steel |
| CN110118695A (en) * | 2019-05-23 | 2019-08-13 | 南京工程学院 | A kind of constant stress load hydrogen permeability experimental facility and test method |
| CN110455626A (en) * | 2019-08-21 | 2019-11-15 | 重庆科技学院 | A kind of deformed bar durability test device |
| CN111537340A (en) * | 2020-06-28 | 2020-08-14 | 青岛理工大学 | Anchor rod bearing performance testing device under load and erosion environment coupling effect |
| CN111766164A (en) * | 2020-08-07 | 2020-10-13 | 中冶建筑研究总院有限公司 | Fatigue-stress relaxation testing device for prestressed tendon |
| CN111795895A (en) * | 2019-04-08 | 2020-10-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device for researching corrosion of prestressed concrete pressure pipeline and use method thereof |
| CN111795888A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN112362474A (en) * | 2020-11-05 | 2021-02-12 | 柳州欧维姆机械股份有限公司 | Longitudinal load resistance test device and method for pipeline system |
| CN112629836A (en) * | 2020-10-29 | 2021-04-09 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112903497A (en) * | 2021-01-15 | 2021-06-04 | 清华大学 | Steel constant-load stress corrosion test device and method under periodic infiltration condition |
| CN113295527A (en) * | 2021-05-24 | 2021-08-24 | 燕山大学 | Device for measuring stress relaxation of fiber reinforced composite bar and measuring method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183340A (en) * | 1997-12-25 | 1999-07-09 | Nkk Corp | Frp tension test piece |
| CN2593182Y (en) * | 2002-12-27 | 2003-12-17 | 北京航空材料研究院 | Portable tensile stress corrosion test apparatus |
| CN101271103A (en) * | 2008-05-16 | 2008-09-24 | 东南大学 | Experimental device for concrete multifactor permanent stability under co-action of pulling stress and surroundings |
| CN201689016U (en) * | 2010-04-12 | 2010-12-29 | 青岛理工大学 | Concrete constant tensile holding and composite corrosion test device |
| CN201803903U (en) * | 2010-09-19 | 2011-04-20 | 航天科工防御技术研究试验中心 | Aluminum alloy tensile stress corrosion test 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 |
| CN203231940U (en) * | 2013-05-02 | 2013-10-09 | 东南大学 | Constant temperature stress corrosion testing device for FRP (Fiber Reinforced Plastic) rib |
-
2013
- 2013-05-02 CN CN2013101599294A patent/CN103376222A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183340A (en) * | 1997-12-25 | 1999-07-09 | Nkk Corp | Frp tension test piece |
| CN2593182Y (en) * | 2002-12-27 | 2003-12-17 | 北京航空材料研究院 | Portable tensile stress corrosion test apparatus |
| CN101271103A (en) * | 2008-05-16 | 2008-09-24 | 东南大学 | Experimental device for concrete multifactor permanent stability under co-action of pulling stress and surroundings |
| CN201689016U (en) * | 2010-04-12 | 2010-12-29 | 青岛理工大学 | Concrete constant tensile holding and composite corrosion test device |
| CN201803903U (en) * | 2010-09-19 | 2011-04-20 | 航天科工防御技术研究试验中心 | Aluminum alloy tensile stress corrosion test 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 |
| CN203231940U (en) * | 2013-05-02 | 2013-10-09 | 东南大学 | Constant temperature stress corrosion testing device for FRP (Fiber Reinforced Plastic) rib |
Non-Patent Citations (1)
| Title |
|---|
| 张光超等: "应力状态下FRP筋/索耐腐蚀性能试验研究", 《第七届全国建设工程FRP应用学术交流会论文集》, 14 October 2011 (2011-10-14) * |
Cited By (40)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515729A (en) * | 2014-12-05 | 2015-04-15 | 国家电网公司 | Fiber composite core rapid aging detection device |
| CN104515729B (en) * | 2014-12-05 | 2018-10-23 | 国家电网公司 | A kind of fiber composite core quick aging detection device |
| CN104614255B (en) * | 2015-01-26 | 2017-11-03 | 中国科学院金属研究所 | A kind of axially loaded stress corrosion testing device of high temperature |
| CN104614255A (en) * | 2015-01-26 | 2015-05-13 | 中国科学院金属研究所 | High-temperature axial loading stress corrosion test device |
| CN104805841A (en) * | 2015-02-28 | 2015-07-29 | 河海大学 | FRP rib anchor rod anchoring head capable of applying prestress |
| CN104805841B (en) * | 2015-02-28 | 2016-11-30 | 河海大学 | A kind of prestressed FRP rebar anchor pole anchor head |
| CN104792626A (en) * | 2015-04-21 | 2015-07-22 | 东南大学 | Experimental device of FRP rib durability under stretching stress and environment coupling effect |
| CN104792626B (en) * | 2015-04-21 | 2018-07-20 | 东南大学 | Tensile stress and FRP tendons endurance quality experimental provision under environment coupled action |
| CN104807712A (en) * | 2015-05-22 | 2015-07-29 | 郑州大学 | Device and method for simultaneously testing constant-temperature stress corrosion of multiple FRP (Fiber Reinforced Polymer) reinforcements |
| CN104865128A (en) * | 2015-05-29 | 2015-08-26 | 福州大学 | Device and method for prestressing CFRP (Carbon Fiber Reinforced Plastics) plate in double directions in static test |
| CN106404577A (en) * | 2016-08-25 | 2017-02-15 | 江苏大学 | High temperature radial loading stress corrosion sample device |
| CN106442130A (en) * | 2016-09-09 | 2017-02-22 | 哈尔滨工程大学 | Experimental device for durability of multiple FRP (Fiber Reinforced Plastic) rebars under action of marine environment and tensile stress |
| CN106442130B (en) * | 2016-09-09 | 2019-02-26 | 哈尔滨工程大学 | One kind more FRP tendons durability experimental devices under marine environment and action of pulling stress |
| CN106808583A (en) * | 2017-01-23 | 2017-06-09 | 山西高行液压股份有限公司 | One kind puts an adapter sleeve |
| CN106872343A (en) * | 2017-01-24 | 2017-06-20 | 中国水利水电科学研究院 | A kind of internal balance type prestress anchorage cable stress corrosion (cracking) test system and its test method |
| CN106872343B (en) * | 2017-01-24 | 2018-06-26 | 中国水利水电科学研究院 | A kind of internal balance type prestress anchorage cable stress corrosion (cracking) test system and its test method |
| CN106872270A (en) * | 2017-02-14 | 2017-06-20 | 辽宁省水利水电科学研究院 | A kind of metal hydrogen embrittlement sensitivity tests system |
| CN109142201A (en) * | 2018-07-31 | 2019-01-04 | 浙江交通职业技术学院 | A kind of steel wire precisely lasting holding force accelerated corrosion experimental rig and method |
| CN109374168A (en) * | 2018-09-17 | 2019-02-22 | 武汉希萌科技有限公司 | A method of accurately using load cell in tensioning construction |
| CN109444030A (en) * | 2018-11-01 | 2019-03-08 | 东南大学 | FRP plate material/sheet material the corrosion testing apparatus and method of self-correction prestressing force angle |
| CN109540669A (en) * | 2018-12-03 | 2019-03-29 | 北京工业大学 | A kind of FRP tendons continue compression lock test device |
| CN109540669B (en) * | 2018-12-03 | 2021-08-17 | 北京工业大学 | FRP muscle lasts compressive stress locking test device |
| CN109914253A (en) * | 2019-03-20 | 2019-06-21 | 中交路桥建设有限公司 | A kind of aerial Dock With Precision Position system and method for suspension bridge girder steel |
| CN111795895A (en) * | 2019-04-08 | 2020-10-20 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device for researching corrosion of prestressed concrete pressure pipeline and use method thereof |
| CN111795895B (en) * | 2019-04-08 | 2022-03-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device and test method for researching durability of prestressed concrete pressure pipeline |
| CN110118695A (en) * | 2019-05-23 | 2019-08-13 | 南京工程学院 | A kind of constant stress load hydrogen permeability experimental facility and test method |
| CN110118695B (en) * | 2019-05-23 | 2021-11-30 | 南京工程学院 | Constant stress loading hydrogen permeation experimental device and method |
| CN110455626A (en) * | 2019-08-21 | 2019-11-15 | 重庆科技学院 | A kind of deformed bar durability test device |
| CN111537340A (en) * | 2020-06-28 | 2020-08-14 | 青岛理工大学 | Anchor rod bearing performance testing device under load and erosion environment coupling effect |
| CN111795888B (en) * | 2020-07-17 | 2021-06-08 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN111795888A (en) * | 2020-07-17 | 2020-10-20 | 北京航空航天大学 | Composite material compression clamp with load and environment coupling effect and use method |
| CN111766164A (en) * | 2020-08-07 | 2020-10-13 | 中冶建筑研究总院有限公司 | Fatigue-stress relaxation testing device for prestressed tendon |
| CN111766164B (en) * | 2020-08-07 | 2021-04-20 | 中冶建筑研究总院有限公司 | Fatigue-stress relaxation testing device for prestressed tendon |
| CN112629836A (en) * | 2020-10-29 | 2021-04-09 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112629836B (en) * | 2020-10-29 | 2022-08-26 | 中冶建筑研究总院有限公司 | Automatic compensation device for prestress loss |
| CN112362474A (en) * | 2020-11-05 | 2021-02-12 | 柳州欧维姆机械股份有限公司 | Longitudinal load resistance test device and method for pipeline system |
| CN112362474B (en) * | 2020-11-05 | 2023-06-13 | 柳州欧维姆机械股份有限公司 | Longitudinal load resistance test device and method for pipeline system |
| CN112903497A (en) * | 2021-01-15 | 2021-06-04 | 清华大学 | Steel constant-load stress corrosion test device and method under periodic infiltration condition |
| CN112903497B (en) * | 2021-01-15 | 2021-10-22 | 清华大学 | Steel constant-load stress corrosion test device and method under periodic infiltration condition |
| CN113295527A (en) * | 2021-05-24 | 2021-08-24 | 燕山大学 | Device for measuring stress relaxation of fiber reinforced composite bar and measuring method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103376222A (en) | Constant-temperature stress corrosion testing device and method for FRP (fiber reinforced polymer) tendon | |
| CN203231940U (en) | Constant temperature stress corrosion testing device for FRP (Fiber Reinforced Plastic) rib | |
| CN104807712A (en) | Device and method for simultaneously testing constant-temperature stress corrosion of multiple FRP (Fiber Reinforced Polymer) reinforcements | |
| CN105588751A (en) | Reinforced concrete bonding segment drawing fatigue and corrosion coupling testing device and testing method | |
| CN101109691B (en) | Device and method for metallic rod body material stress corrosion test | |
| CN104792626B (en) | Tensile stress and FRP tendons endurance quality experimental provision under environment coupled action | |
| CN101806714B (en) | Beam tester of bonding strength of fibre reinforced composite sheet and concrete | |
| CN110441145A (en) | A kind of tunnel lining concrete durability test method | |
| CN104237002B (en) | A kind of salting liquid corrosion and load testing machine | |
| CN102628774B (en) | Tension stress loading and deformation measuring device and method for measuring deformation amount of concrete test piece under tension stress | |
| CN102620989B (en) | Test device for durability of FRP (Fiber Reinforced Plastic) bar under action of environment/stress and test method | |
| CN108760495B (en) | Bidirectional tension bonding test device and test method for weak-rigidity rib | |
| CN108801889B (en) | Corrosion evaluation device and method for simulating composite stress of reinforced concrete member | |
| CN103234902A (en) | Device and method for testing adhesive property between fiber reinforce plastic (FRP) rib and concrete under complicated stress state | |
| CN105806769A (en) | Accelerated corrosion test device and method for FRP reinforcement sea water and sea sand concrete members | |
| CN103698260A (en) | Novel-old pavement connecting layer water permeability detection method and detection device | |
| CN107290234A (en) | Determine the pilot system and method for corrosion steel wire fatigue life | |
| CN1737530A (en) | Method for testing permeability coefficient and anti-pervasion gradient ratio | |
| CN108106992A (en) | Test about Bond Strength method under the conditions of the infiltration of coating material pressure | |
| CN109444030A (en) | FRP plate material/sheet material the corrosion testing apparatus and method of self-correction prestressing force angle | |
| CN103321259B (en) | Testing system for anchor network reinforcement of underground engineering broken surrounding rock | |
| CN108507866B (en) | Test piece measurement structure for weak-rigidity reinforcement bidirectional tension bonding test and assembly method | |
| CN110455695B (en) | Device and method for testing permeability coefficient of concrete under action of dry and wet cycle and tensile stress | |
| CN113945452A (en) | Method for testing bonding performance and durability of FRP (fiber reinforced Plastic) bar and concrete under coupling action | |
| CN108181175A (en) | A kind of device and method for testing eccentric tension concrete durability |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131030 |