CN211179344U - FRP consolidates concrete beam interface heat resistance survey device - Google Patents
FRP consolidates concrete beam interface heat resistance survey device Download PDFInfo
- Publication number
- CN211179344U CN211179344U CN201921931434.8U CN201921931434U CN211179344U CN 211179344 U CN211179344 U CN 211179344U CN 201921931434 U CN201921931434 U CN 201921931434U CN 211179344 U CN211179344 U CN 211179344U
- Authority
- CN
- China
- Prior art keywords
- heated
- loading
- component
- concrete beam
- groove
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model belongs to the technical field of civil engineering reinforcement, and discloses a device for measuring the heat resistance of an FRP reinforced concrete beam interface, wherein hinged supports with adjustable positions are arranged at two ends of the length direction of a base, and a heating device is arranged in the middle of the upper end of the base; the heating device is provided with a groove-shaped heating plate, four heat insulation end plates at two ends and two heat insulation cover plates at the top; the upper sides of the two ends of the base in the width direction are welded with loading frames, and the inner sides of the loading frames are provided with loading devices. The utility model can seal the internal component to be heated through the groove-shaped heating plate and the heat insulation plates around, ensure the heating and temperature rising effect of the groove-shaped heating plate on the component to be heated, can be used for simulating high temperature environments such as fire and the like, and is used for measuring the reinforcing effect of the fiber material reinforced concrete beam at high temperature; meanwhile, an external loading device is combined, so that synchronous loading of temperature and load can be realized, and the high-temperature damage mechanism and the performance degradation rule of the FRP reinforced concrete beam can be conveniently measured.
Description
Technical Field
The utility model belongs to the technical field of civil engineering consolidates, especially, relate to a FRP consolidates concrete beam interface heat resistance survey device.
Background
Currently, the closest prior art in the industry is:
the reinforcing technology of adhering Fiber Reinforced Polymer (FRP) is to utilize epoxy resin material to adhere fiber material to the outer surface of concrete member so as to reach the aims of improving structure function and reinforcing. Compared with other reinforcement technologies, the FRP reinforced concrete technology has the advantages of light weight, high strength, convenience and quickness in construction, corrosion resistance, flexibility, easiness in cutting and the like. However, the fire resistance of the bonded fiber reinforced concrete structure is poor. Most of the matrix materials in the fiber composite material and the adhesive materials used for pasting are epoxy organic matters, the fiber composite material has high sensitivity to temperature, the glass transition temperature Tg of the fiber composite material is generally 65-80 ℃, and the fiber composite material gradually loses bonding strength and rigidity at high temperature. Under the high temperature environment, once the gluing agent softens and loses efficacy, will mean that FRP withdraws from work to cause the reinforcement to lose efficacy, cause the reinforced structure under the high temperature to be more dangerous. Therefore, the research on the high-temperature performance of the FRP reinforced concrete structure is actively carried out, and the improvement response measure is provided, which is the key for ensuring the structure safety and accelerating the technical popularization, and has important theoretical and practical significance.
The conventional common method for improving the heat resistance of the FRP reinforced concrete member is to place the member in an environment box for heating, and then take out the member for loading. In the mode, the component to be heated is not placed in a closed environment, the component can be naturally cooled in the taking-out and loading processes to cause temperature reduction and deviation from the target temperature, and the heating effect is unstable. In addition, in a non-closed environment, the temperature change of the environment cannot be controlled by the temperature control device, the high-temperature and fire environment cannot be effectively simulated, and the temperature action and the loading are asynchronous, so that the high-temperature resistance of the component cannot be effectively researched; in contrast, although a large-scale high-temperature furnace experiment can effectively simulate a high-temperature fire scene and realize synchronous loading, the cost is huge.
In summary, the problems of the prior art are as follows:
(1) when the FRP reinforced concrete member is tested for heat resistance, the member to be heated is not placed in a closed environment, the heating effect is unstable, and the high-temperature and fire environment cannot be effectively simulated.
(2) The cost of large high temperature furnace experiments is enormous.
The difficulty of solving the technical problems is as follows:
the domestic and foreign standard specifies the FRP reinforcing method and the construction method of the concrete structure at normal temperature in more detail, the guidance on high temperature is not deep, a certain high temperature resistant effect is achieved only by specifying a series of limiting measures such as reinforcing quantity, using temperature range and the like, and the heat resistance is not quantitatively guided and is difficult to ensure.
The significance of solving the technical problems is as follows: the FRP reinforced concrete member is subjected to a constant-load heating or constant-temperature loading test, the influence of temperature change on the reinforcement performance of the member can be simulated, and the influence of high temperature on the ultimate bonding bearing capacity of an interface can also be simulated, so that the damage form, the bearing capacity, the deformation process and the like of the concrete member under the high-temperature condition can be researched, and an important theoretical basis and a key technical support are provided for the theoretical perfection and practical application of the technology.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a FRP consolidates concrete beam interface heat resistance survey device.
The utility model discloses a realize like this, a FRP consolidates concrete beam interface heat resistance survey device is provided with:
a base;
the two ends of the base in the length direction are provided with hinged supports with adjustable positions for supporting the test component; a groove-shaped heating plate is arranged in the middle of the base corresponding to the area to be heated and used for heating the test component; the two ends of the base in the width direction are connected with a loading frame, and a loading and measuring instrument is arranged on the inner side of the loading frame.
A heating device;
the heating device consists of a groove-shaped heating plate, four heat-insulating end plates at two ends and two heat-insulating cover plates at the top. The central area of the bottom of the member to be heated at the bottom is arranged in the groove-shaped heating plate, the two ends of the member are arranged on the external hinged supports, and the top surface and the two side part side surfaces of the member are arranged outside the groove-shaped heating plate. Two heat insulation end plates at each end are vertically arranged from two sides of the heating device in the length direction and are connected with the bottom of the member to be heated and part of the side surface area to close the end space; two heat-insulating top cover plates are horizontally arranged from two sides of the component to be heated and are connected with the side surfaces of the component to be heated to seal a top space.
A loading and measuring device;
the loading and measuring device consists of a loading frame, a loading instrument and a measuring instrument. The loading frame is used for bearing action counter force and fixing the loading and measuring instrument; the loading instrument (jack) is positioned in the loading frame and used for applying load; and the measuring instrument respectively measures and records the load value of the jack and the midspan displacement value of the component.
The utility model discloses a cell type hot plate and heat insulating board on every side can seal the heating member of treating of inside, guarantees that the cell type hot plate treats the heating intensification effect of heating member, can be used to high temperature environment such as simulation conflagration for the reinforcement effect to fiber material reinforcement concrete beam under the high temperature is surveyed. Meanwhile, by combining an external loading device, synchronous loading of temperature and load can be realized, the high-temperature damage mechanism and the performance degradation rule of the FRP reinforced concrete beam can be conveniently measured, and an important theoretical basis and key technical support can be provided for theoretical perfection and practical application of the FRP reinforcement technology.
Further, the cell type hot plate is provided with outside protective housing, and the insulating layer has been laid to outside protective housing inboard, and the heater strip has been laid to the insulating layer inboard, and the heater strip is connected with the temperature controller through the lead-out wire electricity.
The utility model discloses use the heating wire of temperature controller control to heat up, through setting up heating power and arranging the heating wire, the scope of heating up can realize 0 ~ 800 ℃, easy and simple to handle and resources are saved.
Further, the base upper end has the slip track through the bolt fastening, and the slip track aligns with the inboard bottom level of cell type hot plate, and the slip track surface has the hinged-support through the bolt fastening, and the hinged-support can relax the bolt according to actual conditions and adjust to the assigned position, then fixing bolt.
The utility model discloses a support can drive and wait to heat the component and remove in the slip track, is convenient for will wait to heat the component level and convey inside the cell type hot plate.
Furthermore, the loading device is provided with a jack, the jack is fixed on the inner side of the loading frame through a bolt, a displacement meter is fixed on the inner side of the loading frame through a magnetic base, a measuring needle of the displacement meter is in contact with the top surface of the member to be heated at the bottom (the top surface is positioned outside the heating device), and the jack and the displacement meter are respectively and electrically connected with an external controller through data lines.
The utility model can load the component to be heated through the jack until the test piece is destroyed, and the whole loading process is controlled by the controller; the loading and heating processes can also be carried out synchronously, or the loading is carried out after the temperature is firstly increased to the preset temperature.
Further, the side plate supports are welded at the two ends of the groove-shaped heating plate, and the cross section size of the component to be heated is matched with the side plate supports.
The utility model discloses a curb plate holds in the palm and can conveniently promote to the thermal-insulated end plate at both ends and put into for wait that heating element and cell type hot plate bottom do not have direct contact, a plurality of high temperature resistant baffles form airtight space with the test piece bottom, so that heat the test piece bottom.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for measuring interface heat resistance of an FRP reinforced concrete beam provided by an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a thermal insulation layer provided by an embodiment of the present invention.
Fig. 3 is a schematic structural view of a first heat-insulating end plate and a second heat-insulating end plate according to an embodiment of the present invention.
Fig. 4 is a schematic view of a side plate support structure provided by the embodiment of the present invention.
Fig. 5 is a schematic structural view of a groove-shaped heating plate according to an embodiment of the present invention.
In the figure: 1. an outer protective shell; 2. a thermal insulation layer; 3. an electric heating wire; 4. a temperature controller; 5. an outgoing line; 6. a top cover plate; 7. a first insulated end plate; 8. a second insulated end plate; 9. a member to be heated; 10. a side plate support; 11. a displacement meter; 12. a loading frame; 13. a controller; 14. a support; 15. a sliding track; 16. a jack; 17. a base; 18. a trough-type heating plate.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
Problem to prior art existence, the utility model provides a FRP consolidates concrete beam interface heat resistance survey device, it is right to combine the figure below the utility model discloses do detailed description.
As shown in fig. 1 to 4, an embodiment of the present invention provides an apparatus for measuring FRP reinforced concrete beam interface heat resistance, including: the device comprises an external protective shell 1, a heat insulation layer 2, a heating wire 3, a temperature controller 4, a lead-out wire 5, a top cover plate 6, a first heat insulation end plate 7, a second heat insulation end plate 8, a component to be heated 9, a side plate support 10, a displacement meter 11, a loading frame 12, a controller 13, a support 14, a sliding rail 15, a jack 16, a base 17 and a groove-shaped heating plate 18.
The two ends of the base 17 in the length direction are provided with hinged supports with adjustable positions, and the middle of the upper end of the base 17 is provided with a heating device; the heating device is provided with a groove-shaped heating plate 18, two first heat-insulating end plates 7 at two ends, two second heat-insulating end plates 8 and two heat-insulating cover plates at the top, the central area of the bottom of a component 9 to be heated at the bottom is placed in the groove-shaped heating plate 18, two ends of the component 9 to be heated at the bottom are placed on an external hinged support, and the top surface and two side part side surfaces of the component to be heated at the bottom are placed outside the groove-shaped heating plate; two heat insulation end plates at each end of the member to be heated 9 at the bottom are vertically arranged from two sides of the heating device in the length direction and are connected with the bottom and partial side surface area of the member to be heated 9 to close the end space; two heat-insulating top cover plates are horizontally arranged from two sides of the component to be heated and are connected with the side surfaces of the component to be heated to seal a top space; the upper sides of the two ends of the base in the width direction are welded with loading frames, and the inner sides of the loading frames are provided with loading devices.
Preferably, the groove-shaped heating plate 18 is provided with an external protective shell 1, a heat insulation layer 2 is laid on the inner side of the external protective shell 1, a heating wire 3 is laid on the inner side of the heat insulation layer 2, and the heating wire 3 is electrically connected with a temperature controller 4 through an outgoing line 15. The heating wire controlled by the temperature controller 4 is used for heating, the heating range can be 0-800 ℃ by setting heating power and arranging the heating wire, the operation is simple and convenient, and resources are saved.
Preferably, the upper end of the base 17 is fixed with a sliding rail 15 through bolts, the sliding rail 15 is horizontally aligned with the inner bottom of the groove-shaped heating plate 18, and a support is fixed on the surface of the sliding rail 15 in a sliding way. The support can drive the member to be heated to move in the sliding track, so that the member to be heated can be horizontally conveyed to the inside of the groove-shaped heating plate conveniently.
Preferably, the loading device is provided with a jack 16, the jack 16 is fixed on the inner side of the loading frame 12 through a bolt, the displacement meter 11 is fixed on the inner side of the loading frame 12 through a magnetic base, a measuring needle of the displacement meter 11 is in contact with the upper end of the member to be heated 9, and the jack and the displacement meter are respectively and electrically connected with an external controller through a data line. The component to be heated can be loaded through the jack until the test piece is damaged, and the whole loading process is controlled by the controller; the loading and heating processes can also be carried out synchronously, or the loading is carried out after the temperature is firstly increased to the preset temperature.
Preferably, the side plate brackets 10 are welded at both ends of the groove-shaped heating plate 18, and the cross-sectional dimension of the bottom of the component to be heated 9 is matched with the side plate brackets 10. Can conveniently promote through side board support 10 and put into the thermal-insulated end plate at both ends for wait that heating element and cell type hot plate bottom do not have direct contact, a plurality of high temperature resistant baffles form airtight space with the test piece bottom, so that heat the test piece bottom.
The utility model discloses a theory of operation is:
the utility model discloses when using, at first carry out the testing arrangement equipment, place groove shape hot plate 18 in the intermediate position of base, adjust support 14 positions, treat the FRP reinforcement component that heaies up with the bottom and arrange this groove shape hot plate 18 in, make the component bottom and the groove shape hot plate position phase-match that treat to heat up to in order to heat up. Pushing a high-temperature-resistant first heat-insulating end plate 7 and a high-temperature-resistant second heat-insulating end plate 8 into the two ends of the groove-shaped heating plate along the side plate supports 10 to seal the end space of the groove-shaped heating plate; and (3) respectively covering high-temperature-resistant top cover plates 6 on two sides of the member to be heated to enable the member to be bonded with the member to be heated and seal the upper space of the groove-shaped heating plate, so that the whole heating device forms a closed space.
Heating process: the bottom of the heating device is embedded with a heating wire 3 which is connected with a temperature controller 4 through a leading-out wire 5, and the temperature controller 4 is operated to adjust the temperature in the heating groove, so that the component to be heated is heated. Can be in the inside pre-buried thermocouple temperature testing arrangement of test piece when waiting to test the test piece preparation, can be connected thermocouple and temperature controller during the experiment to more accurate control test piece temperature is favorable to experimental success to be gone on.
And (3) loading process: after the temperature is raised to the target temperature and the temperature is kept constant for a certain time, the jack 16 is controlled by the loading control and data acquisition system 13 to carry out loading, the loading mode can be single-point loading or multi-point loading, and the whole loading process is controlled by the loading control and data acquisition system 13 until the test piece is damaged; the loading and heating processes can also be carried out simultaneously, or the loading can be carried out after the temperature is raised to the preset temperature, which depends on the content to be researched.
During the test, displacement data, namely the deflection of the FRP reinforced concrete beam can be obtained through the displacement meter 11; the controller 13 may also display the amount of load applied to the component; the temperature controller 4 can effectively control the temperature in the heating device; observing a high-temperature damage mechanism and a performance degradation rule of the FRP reinforced concrete beam, determining the damage form, the bearing capacity, the deformation development process and the like of the reinforced beam after the high-temperature softening of the adhesive, analyzing the influence of the interface bonding and the anchoring failure process on the bending resistance of the whole reinforced member, establishing an FRP strength utilization coefficient calculation method, and providing an important theoretical basis and key technology support for the theoretical perfection and practical application of the FRP reinforcing technology at the temperature.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (5)
1. The device for measuring the interface heat resistance of the FRP reinforced concrete beam is characterized by being provided with:
a base;
the two ends of the base in the length direction are provided with hinged supports with adjustable positions, and the middle of the upper end of the base is provided with a heating device;
the heating device is provided with a groove-shaped heating plate, four heat insulation end plates at two ends and two heat insulation cover plates at the top, the central area of the bottom of the component to be heated at the bottom is placed in the groove-shaped heating plate, two ends of the component to be heated at the bottom are placed on an external hinged support, and the top surface and two side part side surfaces of the component to be heated at the bottom are placed outside the groove-shaped heating plate; two heat insulation end plates at each end of the component to be heated at the bottom are vertically arranged from two sides of the heating device in the length direction and are connected with the bottom and partial side surface area of the component to be heated to close the end space; two heat-insulating top cover plates are horizontally arranged from two sides of the component to be heated and are connected with the side surfaces of the component to be heated to seal a top space;
the loading frame is welded on the upper sides of two ends of the base in the width direction, and a loading device is arranged on the inner side of the loading frame.
2. The apparatus for measuring the interface heat resistance of an FRP reinforced concrete beam as claimed in claim 1, wherein the groove-shaped heating plate is provided with an outer protective shell, a heat insulating layer is laid on the inner side of the outer protective shell, and a heating wire is laid on the inner side of the heat insulating layer, and the heating wire is electrically connected with a temperature controller through a leading-out wire.
3. The apparatus for measuring the interfacial heat resistance of an FRP reinforced concrete beam as claimed in claim 1, wherein a sliding rail is fixed to the upper end of the base by means of bolts, the sliding rail is horizontally aligned with the bottom of the inside of the grooved heating plate, and a hinge support is fixed to the surface of the sliding rail by means of bolts.
4. The apparatus for measuring the interface heat resistance of an FRP reinforced concrete beam as claimed in claim 1, wherein the loading means is provided with a jack, the jack is fixed inside the loading frame by a bolt, a displacement gauge is fixed inside the loading frame by a magnetic base, a measuring pin of the displacement gauge is in contact with the upper end of the member to be heated, and the jack and the displacement gauge are electrically connected to an external controller through a data line, respectively.
5. The apparatus for measuring the interface heat resistance of an FRP reinforced concrete beam as recited in claim 1, wherein side plate holders are welded to both ends of the groove type heating plate, and the sectional dimension of the member to be heated is fitted to the side plate holders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931434.8U CN211179344U (en) | 2019-11-11 | 2019-11-11 | FRP consolidates concrete beam interface heat resistance survey device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921931434.8U CN211179344U (en) | 2019-11-11 | 2019-11-11 | FRP consolidates concrete beam interface heat resistance survey device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211179344U true CN211179344U (en) | 2020-08-04 |
Family
ID=71826546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921931434.8U Expired - Fee Related CN211179344U (en) | 2019-11-11 | 2019-11-11 | FRP consolidates concrete beam interface heat resistance survey device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211179344U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793865A (en) * | 2019-11-11 | 2020-02-14 | 中国海洋大学 | System and method for measuring interface heat resistance of FRP reinforced concrete beam |
-
2019
- 2019-11-11 CN CN201921931434.8U patent/CN211179344U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793865A (en) * | 2019-11-11 | 2020-02-14 | 中国海洋大学 | System and method for measuring interface heat resistance of FRP reinforced concrete beam |
| CN110793865B (en) * | 2019-11-11 | 2024-08-23 | 中国海洋大学 | FRP reinforced concrete beam interface heat resistance measuring system and measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Carozzi et al. | Experimental investigation of tensile and bond properties of Carbon-FRCM composites for strengthening masonry elements | |
| CN204536179U (en) | Thermal-mechanical Coupling experiment all-in-one | |
| CN102706734B (en) | Loading test device and method of asymmetric lateral-force-resisting structure | |
| CN103267682B (en) | The proving installation of material creep and method of testing under tension and environment coupled action | |
| Stratford et al. | Effect of warm temperatures on externally bonded FRP strengthening | |
| CN110687272A (en) | Rock joint face shear seepage test device and test method based on geothermal exploitation | |
| CN211179344U (en) | FRP consolidates concrete beam interface heat resistance survey device | |
| Xie et al. | Pultruded GFRP square hollow columns with bolted sleeve joints under eccentric compression | |
| CN103411992B (en) | Steel structure fireproof paint fire resistance limit rapid test method and apparatus | |
| CN104458436A (en) | High-temperature drawing experiment device of anchoring material and experiment method of high-temperature drawing experiment device | |
| CN102565310A (en) | Test device and determination method of anti-cracking performance of early-age concrete under different temperature and humidity environmental conditions | |
| CN108760360A (en) | A kind of overload ambient heat centrifugal test device | |
| CN109778666B (en) | Stay cable force sensing and temperature linear control compensation device and construction method | |
| CN108344614A (en) | Experimental rig and method of the measuring temperature to steel wire aging effects under corrosion fatigue | |
| CN112304790B (en) | Fatigue test method for heat supply direct-buried pipeline | |
| Perrella et al. | A novel methodology for shear cohesive law identification of bonded reinforcements | |
| CN107525723A (en) | A kind of large-scale direct shear test method of pile-soil interaction for considering temperature action | |
| CN103743626A (en) | Test apparatus and test method for reinforced concrete beam freeze thawing durability | |
| CN110146371A (en) | Heating and thermal insulation sleeve is loaded for large scale rock direct shear test | |
| CN110793865B (en) | FRP reinforced concrete beam interface heat resistance measuring system and measuring method | |
| CN110308092A (en) | A kind of armored concrete adhesive property cupping machine | |
| CN110320111A (en) | A kind of tension test part, tensile test apparatus and stretching test method | |
| CN206074164U (en) | Transformer high-voltage bushing end yi word pattern gold utensil three-dimensional pulling force sensor | |
| CN110174349B (en) | Push-out test device and method for high-temperature compression steel plate-concrete composite plate | |
| CN215339317U (en) | Test device for simulating load-temperature coupling effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 Termination date: 20211111 |