CN105806769A - Accelerated corrosion test device and method for FRP reinforcement sea water and sea sand concrete members - Google Patents
Accelerated corrosion test device and method for FRP reinforcement sea water and sea sand concrete members Download PDFInfo
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- CN105806769A CN105806769A CN201610158781.6A CN201610158781A CN105806769A CN 105806769 A CN105806769 A CN 105806769A CN 201610158781 A CN201610158781 A CN 201610158781A CN 105806769 A CN105806769 A CN 105806769A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
Abstract
The invention discloses an accelerated corrosion test device for FRP reinforcement sea water and sea sand concrete members. The accelerated corrosion test device comprises a tide environment simulating system, a loading system and an FRP rebar anchoring system. The tide environment simulating system comprises two water tanks, two water pumps are arranged between the water tanks, a water outlet of one water tank is communicated with a water inlet of the other water tank through one water pump, a water inlet of one water tank is communicated with a water outlet of the other water tank through the other water pump, and a heating rod and a wave making pump are further arranged in each water tank. The loading system comprises a set of support columns arranged in the water tanks, FRP reinforcement sea sand concrete beams are arranged on the support columns in an erected mode, levers are supported at the top of each FRP reinforcement sea sand concrete beam through a plurality of evenly-distributed buttresses respectively, one end of each lever is hinged to an FRP rebar which is anchored in the corresponding water tank through the FRP rebar anchoring mechanism, and the other end of each lever is connected with a load. The accelerated corrosion test device can simulate sea waves in the soaking process and simulate sea wind in the drying process, is high in integration level and practicality and can effectively test the long-term performance of the FRP reinforcement sea sand concrete beams after load/wetting-drying cycle accelerated corrosion.
Description
Technical field
The present invention relates to the mechanical property test technical field of building component, specifically a kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device and method.
Background technology
FRP muscle, due to its excellent decay resistance, becomes the ideal material substituting reinforcing bar under corrosive atmosphere.But owing to FRP material is shorter for civil engineering history, durability inspection achievement in Practical Project is rare, and the research of its endurance quality is particularly important.The existing accelerated corrosion for FRP muscle is tested, it is considered to environmental factors single, especially lack the coupling of applied stress, in reality, engineering structure always have external load.Therefore, the impact of external load is must take into when carrying out FRP reinforcement structure endurancing.
Coastal infrastructure is produced great corrosiveness by the drying and watering cycle effect of littoral area sea water, and the loss caused is extremely serious.The reinforcing bar accelerating corrosion that chloride permeability causes is the main reason that xoncrete structure lost efficacy; for a long time; researcher has carried out substantial amounts of research for the anticorrosion of reinforcing bar under marine environment; including adding corrosion inhibitor, galvanizing steel, cathodic protection etc., but all can not perfectly solve steel bar corrosion problem.Along with carrying out of country's Maritime Silk Road strategy, under research ocean drying and watering cycle environment, works corrosion degradation rule becomes a focus.
In order to prevent the too early generation corrosion of the reinforcing bar in concrete, various countries' specification has strict restriction for the content of the chloride ion in concrete, and this makes the sea sand that salinity is high forbid to use in a lot of occasions.But when using FRP muscle to strengthen muscle as inside, the use of sea sand is by unrestricted.Therefore, FRP muscle strengthens marine sand concrete structure is the new structure combining form that a class has application prospect very much.At present, correlational study famine, experimental study the type structure long-term behaviour tool under ocean tide environment is of great significance.
Current wetting-drying test can adopt a dead lift test specimen, or uses the automatic equipments such as drying and watering cycle case to complete.During artificial porterage repeatedly, effort, and for the large-scale beam in civil engineering, post component, a dead lift is difficult to carry out.Wetting-drying test case is generally used for the corrosion testing in civil engineering material field, and test specimen number is many and size is little.For large-scale beam, post component, drying and watering cycle case cannot hold, the proof box that custom-made is bigger, and price is high, and the sample dimensions being met by is still limited.And, existing apparatus cannot meet the beam in civil engineering, post component are coupled the test demand being further applied load while drying and watering cycle.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device and method.
Technical scheme: for solving above-mentioned technical problem, a kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device of the present invention, including tide environmental simulation system, loading system and FRP muscle anchoring mechanism；Tide environmental simulation system includes two ponds, is provided with two water pumps between pond, and the outlet in a pond is connected by each water pump respectively with the water inlet in another pond, also sets up heating rod, makes wave pump in each pond；Loading system includes the one group of seat post being located in pond, seat post is added is provided with FRP arrangement of reinforcement sea water marine sand concrete beam, FRP arrangement of reinforcement sea water marine sand concrete beam is above through multiple uniform buttresses support lever respectively, each lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load.
Further, lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, the other end is by articulated joint and the handing-over of another its intermediate part, and this another lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load.
Further, FRP muscle anchoring mechanism includes the anchor slab with holes being located at basin bottom, and FRP muscle one end is fastened by nut after this anchor slab with holes, and the other end is fastened by nut after lever end.
Further, each pond is arranged over heat-preserving cover plate, and heat-preserving cover plate is provided with fan and air outlet, and fan connects time switch.
Further, each FRP arrangement of reinforcement marine sand concrete beam is evenly equipped with multiple displacement meter.
Further, the bottom in each pond tilts to outlet, and the angle of inclination is 5 °～8 °.
Further, in each pond, it is provided with water level controller, water level controller, water pump, heating rod, makes wave pump and connect time switch.
Further, described pond four wall and base plate are formed by concreting, and in concrete, sandwich arranges heat-insulation layer.
A kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion test method, comprises the following steps:
(1) build FRP arrangement of reinforcement sea water marine sand concrete beam, make FRP muscle tensile test specimen and anchor；
(2) FRP arrangement of reinforcement sea water marine sand concrete beam is set up respectively into pond, by the pre-buried anchor slab with holes in insertion pond, FRP muscle tensile test specimen one end that anchored, and screw on screw cap anchoring after basin bottom, cover pond heat-preserving cover plate；
(3) place buttress at the loading position of FRP arrangement of reinforcement sea water marine sand concrete beam, buttress sets up lever, by the other end of FRP muscle tensile test specimen through hole reserved on lever, and tighten with nut；
(4) add counterweight step by step, adjust the nut of FRP muscle tensile test specimen upper end simultaneously, utilize level indicator to make lever maintenance level, until predetermined load level reaches；
(5) erection displacement meter, and one of them pond is irrigated the artificial seawater of 5% sodium chloride content to appointment position, it is ensured that flood test specimen；
(6) according to the drying and watering cycle system set, the opening and closing time of time switch is set；Switch on power, according to the age set, start automatic drying and watering cycle accelerated corrosion；
(7) process of the test is made regular check on, and by tightening nuts, keep lever level, to schedule interval, estimate displacement meter reading；
(8) after the age set reaches, stop test, take out FRP arrangement of reinforcement marine sand concrete beam and band ground tackle FRP muscle tensile test specimen, carry out the test of mechanical property after load/drying and watering cycle accelerated corrosion.
Beneficial effect: a kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device of the present invention, immersion process realizes the simulation to wave, dry run realizes the simulation to Caulis Piperis Kadsurae, integrated level is high, practical, can conveniently realize civil engineering beam, the automatic dry-wet synergistic accelerated corrosion test of post scantling test specimen, and to beam, post, tensional element couples applying stress while drying and watering cycle, make endurancing closer to true service state, solve existing drying and watering cycle equipment and cannot meet the endurancing under ocean tide environment of the civil engineering large-scale component, the deficiency of effective external load coupling cannot be provided.The method of the present invention, it is possible to FRP arrangement of reinforcement sea water marine sand concrete beam long-term behaviour after load/drying and watering cycle accelerated corrosion is effectively tested, effectively supports thus the engineer applied of this new structure is provided.
Accompanying drawing explanation
Fig. 1 is the longitudinal profile structural representation of assay device of the present invention；
Fig. 2 is the horizontal sectional structure schematic diagram of the present invention；
Fig. 3 is the circuit theory diagrams of the present invention；
Fig. 4 is that in Fig. 2, FRP muscle has bonded concrete structural representation；
Fig. 5 is FRP muscle anchoring mechanism structural representation；
Fig. 6 is articulated joint structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device as shown in Figure 1 and Figure 2, including tide environmental simulation system, loading system and FRP muscle anchoring mechanism；Tide environmental simulation system includes two ponds 13, is provided with two water pumps 26,27 between pond 13, the outlet 16 in one pond is connected by each water pump respectively with the water inlet 17 in another pond, also set up heating rod 21,23 in each pond 13, make wave pump 22,24；Each pond 13 is provided above heat-preserving cover plate 15, heat-preserving cover plate 15 is provided with fan 20,25 and air outlet 19, fan 20,25 connect time switch, loading system includes the one group of seat post 10 being arranged in pond, between seat post 10, erection is equipped with FRP arrangement of reinforcement sea water marine sand concrete beam 9, FRP arrangement of reinforcement sea water marine sand concrete beam 9 is above through multiple uniform buttresses 8 support lever 11 respectively, each lever 11 one end is hinged with the FRP muscle 12 being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load 1.FRP muscle anchoring mechanism is included anchor slab with holes 6, FRP muscle 12 one end being arranged on basin bottom and is fastened by nut after this anchor slab 6 with holes, and the other end is fastened by nut behind lever 11 end.Each FRP arrangement of reinforcement sea water marine sand concrete beam 9 is evenly equipped with multiple displacement meter 18, the bottom in each pond 13 tilts to outlet 16, the angle tilted is 5 °～8 °, it is provided with water level controller 31 in each pond 13,32, water level controller 31,32, water pump 26,27, heating rod 21,23, make wave pump 22,24 connect time switch.Lever 11 one end is hinged with the FRP muscle 12 being anchored in pond by FRP muscle anchoring mechanism, the other end can also be by handing-over in the middle part of articulated joint 3 and another lever 2, this another lever 2 one end is hinged with the FRP muscle 5 being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load 1.Pond 13 4 wall and base plate are formed by concreting, and in concrete, sandwich arranges heat-insulation layer.And cover plate 15 can be the bamboo plank of inner clip heat-insulation layer, reserved inlet and outlet 19 and the hole for FRP muscle 5,12, displacement meter 18 traverse on cover plate 15.Water pump 26,27 can be magnetic water pump, it is also possible to be the water pump of other seawater corrosion resistance, such as stainless steel pump.
As shown in Figure 3, heating rod 21, make wave pump 22, time switch 29, fan 20 are connected with power supply 28, heating rod 23, make wave pump 24, time switch 34, fan 25 are connected with power supply 28, time switch 30, water level controller 31, water pump 26 are connected with power supply 28, and time switch 33, water level controller 32, water pump 27 are connected with power supply 28.
For actual one day twice fluctuation tide, 00:00 moment left pond high water level submergence test specimen, right pond low water level dried test specimen.Now, the upper control water-level probe of left pond water level controller probe floods, and water level controller 31 is on-state.Setting, in the 00:00 moment, time switch 30 is connected, and water pump 26 works, and sea water is evacuated to right pond from left pond.When left water level in water pool is reduced to left water level in water pool control probe lower control water level, water level controller 31 disconnects, and water pump 26 stops pumping.The record time used, for instance 20 minutes.Next step, in the 00:30 moment, time switch 34 is connected, and heating rod 23, makes wave pump 24, fan 25 and starts working, and in pond, the left side, test specimen is subject to Caulis Piperis Kadsurae desiccation, and in pond, the right, test specimen is by the coupling of high temperature seawater and wave.In the 5:30 moment, time switch 34 disconnects, and heating rod 23, makes wave pump 24, fan 25 and quits work.In the 6:00 moment, time switch 33 is connected, and now, level control switch for water 32 is on-state, and water pump 27 works, and sea water is evacuated to pond, the left side from pond, the right.When right water level in water pool is reduced under probe for controlling level and controls water level, level control switch for water 32 disconnects, and water pump 27 stops pumping.In the 6:30 moment, time switch 29 is connected, and heating rod 21, makes wave pump 22, fan 25 and starts working, and in pond, the left side, test specimen is by the coupling of high temperature seawater and wave, and in pond, the right, test specimen is subject to Caulis Piperis Kadsurae desiccation.11:30 moment, time switch 29) disconnect, heating rod 21, make wave pump 22, fan 25 quits work.In the 12:00 moment, time switch 30 is connected, and water pump 26 works.
In above-mentioned 12 hours, the test specimen in pond, left and right respectively all experienced by a drying and watering cycle.Afterwards, above procedure is repeated.Table 1 be each time switch switch on and off time point.
The each time switch of table 1 switch on and off time point
| Action | Time switch 30 | Time switch 34 | Time switch 32 | Time switch 29 |
| Connect | 00:00 | 00:30 | 06:00 | 06:30 |
| Disconnect | 00:30 | 05:30 | 06:30 | 11:30 |
| Connect | 12:00 | 12:30 | 18:00 | 18:30 |
| Disconnect | 12:30 | 17:30 | 18:30 | 23:30 |
For other drying and watering cycle system, those skilled in the art are referred to above example, and the on-off time of time switch is set.
The present invention also provides for a kind of FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion test method, and it is as follows that it is embodied as step:
(1) build FRP arrangement of reinforcement sea water marine sand concrete beam, adopt screw thread ground tackle to make FRP muscle 5,12 tensile test specimen.
Building and maintenance of FRP arrangement of reinforcement sea water marine sand concrete test beam is completed in laboratory.FRP muscle 5,12 is inserted in screw thread ground tackle, the build-in glue that in ground tackle, perfusion prepares, anchor FRP muscle 5,12.Wherein FRP muscle 5,12 test section can also bond sea water marine sand concrete.
(2) two FRP arrangement of reinforcement sea water marine sand concrete test beams are set up into two ponds respectively, by the pre-buried anchor slab 6 with holes in insertion pond, FRP muscle 5,12 tensile test specimen one end that anchored, and nut of screwing on；
(3) heat-preserving cover plate boxed out by precalculated position is covered；
(4) erection load application system.First, the loading position at test beam places buttress 8, places ball pivot 7 on buttress.Afterwards, set up I-steel lever 2,11, the hole that the other end of FRP muscle 5,12 tensile test specimen is reserved through I-steel, and screw in I-steel top flange with nut.
(5) add counterweight step by step, utilize spanner to turn the nut of two FRP muscle 5,12 tensile test specimen upper ends simultaneously, utilize level indicator to make I-steel maintenance level, until predetermined load level reaches.
(6) erection displacement meter, and one of them pond is irrigated the artificial seawater of 5% sodium chloride content to appointment position, it is ensured that flood test specimen.
(7) according to the drying and watering cycle system set, the opening and closing time of time switch is set.Switch on power, according to the age set, start automatic drying and watering cycle accelerated corrosion；
(8) process of the test is made regular check on, and by tightening nuts, keep I-steel level.Interval to schedule, estimates displacement meter reading；
(9) after the age set reaches, stop test, take out test beam and band ground tackle FRP muscle 5,12 tensile test specimen, carry out the test of mechanical property after load/drying and watering cycle accelerated corrosion.
The above is only the preferred embodiment of the present invention; it is noted that, for those skilled in the art; under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (9)
1. a FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device, it is characterised in that: include tide environmental simulation system, loading system and FRP muscle anchoring mechanism；Tide environmental simulation system includes two ponds, is provided with two water pumps between pond, and the outlet in a pond is connected by each water pump respectively with the water inlet in another pond, also sets up heating rod, makes wave pump in each pond；Loading system includes the one group of seat post being located in pond, seat post is added is provided with FRP arrangement of reinforcement marine sand concrete beam, FRP arrangement of reinforcement marine sand concrete beam is above through multiple uniform buttresses support lever respectively, each lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load.
2. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterized in that: lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, the other end is by articulated joint and the handing-over of another its intermediate part, this another lever one end is hinged with the FRP muscle being anchored in pond by FRP muscle anchoring mechanism, and the other end connects load.
3. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1 and 2, it is characterized in that: FRP muscle anchoring mechanism includes being located at the anchor slab with holes of basin bottom, FRP muscle one end is fastened by nut after this anchor slab with holes, and the other end is fastened by nut after lever end.
4. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterised in that: each pond is arranged over heat-preserving cover plate, and heat-preserving cover plate is provided with fan and air outlet, and fan connects time switch.
5. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterised in that: each FRP arrangement of reinforcement marine sand concrete beam is evenly equipped with multiple displacement meter.
6. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterised in that: the bottom in each pond tilts to outlet, and the angle of inclination is 5 °～8 °.
7. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterised in that: it is provided with water level controller in each pond, water level controller, water pump, heating rod, makes wave pump and connect time switch.
8. FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion assay device according to claim 1, it is characterised in that: described pond four wall and base plate are formed by concreting, and in concrete, sandwich arranges heat-insulation layer.
9. a FRP arrangement of reinforcement sea water sea-sand concrete member accelerated corrosion test method, it is characterised in that: comprise the following steps:
(1) build FRP arrangement of reinforcement sea water marine sand concrete beam, make FRP muscle tensile test specimen and anchor；
(2) FRP arrangement of reinforcement sea water marine sand concrete beam is set up in the seat post in pond respectively, by the pre-buried anchor slab with holes in insertion pond, FRP muscle tensile test specimen one end that anchored, and screw on screw cap anchoring after basin bottom, cover pond heat-preserving cover plate；
(3) place buttress at the loading position of FRP arrangement of reinforcement sea water marine sand concrete beam, buttress sets up lever, by the other end of FRP muscle tensile test specimen through hole reserved on lever, and tighten with nut；
(4) add counterweight step by step, adjust the nut of FRP muscle tensile test specimen upper end simultaneously, utilize level indicator to make lever maintenance level, until predetermined load level reaches；
(5) erection displacement meter, and one of them pond is irrigated the artificial seawater of 5% sodium chloride content to appointment position, it is ensured that flood test specimen；
(6) according to the drying and watering cycle system set, the opening and closing time of time switch is set；Switch on power, according to the age set, start automatic drying and watering cycle accelerated corrosion；
(7) process of the test is made regular check on, and by tightening nuts, keep lever level, to schedule interval, estimate displacement meter reading；
(8) after the age set reaches, stop test, take out FRP arrangement of reinforcement sea water marine sand concrete beam and the FRP muscle tensile test specimen with ground tackle, carry out the test of mechanical property after load/drying and watering cycle accelerated corrosion.
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| CN108505552A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | A kind of long-term anti-pulling capacity indoor test device of fiber bar anti-float anchor rod |
| CN108507934A (en) * | 2018-04-09 | 2018-09-07 | 武汉科技大学 | A kind of experimental rig for FRP tendons body immersion corrosion |
| CN108505551A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | A kind of long-term anti-pulling capacity indoor test method of fiber bar anti-float anchor rod |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
| CN110501280A (en) * | 2019-08-30 | 2019-11-26 | 广东工业大学 | A kind of corrosion simulated device and method for prestressed stretch-draw anchorage |
| CN110553924A (en) * | 2019-09-11 | 2019-12-10 | 哈尔滨工业大学 | test device and method for realizing corrosion-creep coupling of fiber composite material |
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| CN108505552A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | A kind of long-term anti-pulling capacity indoor test device of fiber bar anti-float anchor rod |
| CN108505551A (en) * | 2018-04-28 | 2018-09-07 | 青岛理工大学 | A kind of long-term anti-pulling capacity indoor test method of fiber bar anti-float anchor rod |
| CN110501280A (en) * | 2019-08-30 | 2019-11-26 | 广东工业大学 | A kind of corrosion simulated device and method for prestressed stretch-draw anchorage |
| CN110553924A (en) * | 2019-09-11 | 2019-12-10 | 哈尔滨工业大学 | test device and method for realizing corrosion-creep coupling of fiber composite material |
| CN110470542A (en) * | 2019-09-12 | 2019-11-19 | 辽宁科技大学 | Hold lotus reinforced beam durability loading device |
| CN110470542B (en) * | 2019-09-12 | 2024-03-08 | 辽宁科技大学 | Durable loading device for load-holding reinforced concrete beam |
| CN110793910A (en) * | 2019-11-05 | 2020-02-14 | 天津大学 | Device for simulating corrosion characteristics of metal under coupling action of dry-wet cycle and tensile stress |
| CN113945452A (en) * | 2021-09-08 | 2022-01-18 | 广东工业大学 | Method for testing bonding performance and durability of FRP (fiber reinforced Plastic) bar and concrete under coupling action |
| CN117169059A (en) * | 2023-09-07 | 2023-12-05 | 山东省高速养护集团有限公司 | Chloride ion multidimensional diffusion model device and method |
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