Reinforcing device

Abstract

The utility model discloses a reinforcing device, which relates to the technical field of structural engineering, and comprises a reinforcing plate, fixed end anchorage devices and a midspan back shore mechanism, the two ends of the reinforcing plate are respectively connected with a reinforced member through the fixed end anchorage devices, the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism, and the middle part of the reinforcing plate is connected with the reinforced member through the midspan back shore mechanism. The midspan jacking mechanism is used for conducting prestress tensioning on the reinforcing plate. The reinforcing device is simple in structure, high in operability and capable of improving the ultimate strength and ductility of a reinforced component.

Description

Technical Field

[0001] The utility model relates to the technical field of structural engineering, in particular to a reinforcement device. Background Art

[0002] Most existing reinforcement methods for reinforced concrete flexural members use the prestressing method, which involves first fixing one end of the composite plate to the fixed end anchor of the beam, applying prestress to the composite plate through the tensioning mechanism at the other end and fixing it, and at the same time gluing the middle of the composite plate to the surface of the reinforced member. In this traditional reinforcement method, the tensioning mechanism is relatively complex in structure, requires a large space, and is not flexible in layout. At the same time, there are wet operations during the construction process, and it takes a long time from the beginning of reinforcement to the final completion. The adhesive will also have an adverse effect on the health of the construction workers and the surrounding environment. In terms of mechanical properties, the failure mode of the reinforced beam is often reflected in debonding failure, resulting in low ductility of the reinforced beam. Utility Model Content

[0003] The purpose of the utility model is to provide a reinforcement device to solve the problems existing in the above-mentioned prior art, with simple structure and strong operability, and capable of improving the ultimate strength and ductility of the reinforced component.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model provides a reinforcement device, including a reinforcement plate, a fixed end anchor and a mid-span top support mechanism, wherein the two ends of the reinforcement plate are respectively connected to the reinforced component through the fixed end anchor, and the middle part of the reinforcement plate is connected to the reinforced component through the mid-span top support mechanism, and the mid-span top support mechanism is used to perform prestressing tensioning on the reinforcement plate.

[0006] Preferably, the fixed-end anchor includes a first mounting plate, a second mounting plate, a nut and a fixing screw, one end of the fixing screw is used to be embedded in the reinforced component, the first mounting plate and the second mounting plate are used to clamp the reinforcement plate, the fixing screw passes through the first mounting plate and the second mounting plate in sequence, and the nut is threadedly connected to the fixing screw to achieve fixation of the first mounting plate, the reinforcement plate and the second mounting plate.

[0007] Preferably, the lower surface of the first mounting plate and the upper surface of the second mounting plate are both corrugated, and the lower surface of the first mounting plate and the upper surface of the second mounting plate match in shape.

[0008] Preferably, the reinforcement plate comprises a first mounting portion, a supporting portion and a second mounting portion which are arranged in sequence, the first mounting portion and the second mounting portion are both used to connect with the fixed end anchor, and the supporting portion is used to connect with the mid-span supporting mechanism.

[0009] Preferably, the shapes of the first mounting portion and the second mounting portion match the shapes of the corresponding lower surfaces of the first mounting plate.

[0010] Preferably, the mid-span support mechanism includes an anti-buckling bracket, an upper support movable plate, an elastic-plastic structure, a lower support movable plate and a support screw. The anti-buckling bracket is used to connect to the reinforced component, and the two ends of the support screw are respectively threadedly connected to the anti-buckling bracket. The upper support movable plate can contact the reinforcement plate, the upper support movable plate is connected to the upper end of the elastic-plastic structure, and the lower support movable plate is connected to the lower end of the elastic-plastic structure. The upper support movable plate and the lower support movable plate are both mounted on the support screw, and an adjusting nut is mounted on the support screw, and the adjusting nut is located on the lower support movable plate.

[0011] Preferably, the elastic-plastic structure is S-shaped.

[0012] Preferably, the anti-buckling support comprises an upper frame, a lower frame and a connecting rod, the upper frame is located above the lower frame, the upper frame and the lower frame are connected by the connecting rod, and the top support screw is threadedly connected to the upper frame and the lower frame respectively.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The utility model anchors the two ends of the reinforcement plate at the two ends of the reinforced component respectively, and supports the reinforcement plate away from the surface of the reinforced component and fixes it through a mid-span top support mechanism arranged in the middle of the span, so as to realize prestressing of the reinforcement plate. One or more mid-span top support mechanisms can be arranged at specific positions according to design requirements, wherein the force-bearing performance of the mid-span top support mechanism is elastic-plastic. In the process of the component being stressed, when the elastic-plastic structure of the top support mechanism begins to yield, the stress of the reinforcement plate will no longer increase rapidly, which can not only greatly improve the ultimate strength of the reinforced component, but also provide excellent ductility, and has the advantages of strong designability, strong operability, fast construction speed and high reinforcement efficiency, and is suitable for the reinforcement of bending components in reinforced concrete industrial and civil buildings or bridge structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1This is a schematic diagram of the application of the reinforcement device of the utility model;

[0017] Figure 2 It is a schematic diagram of prestressing the reinforcement plate by the mid-span top support mechanism of the utility model;

[0018] Figure 3 This is an exploded view of the fixed end anchor of the utility model;

[0019] Figure 4 This is a schematic diagram of the mid-span support mechanism of the utility model;

[0020] Figure 5 It is a schematic diagram of the mid-span top support mechanism of the utility model (excluding the anti-buckling frame);

[0021] Figure 6 It is a schematic diagram of the position relationship between the upper supporting movable plate and the reinforcing plate of the utility model;

[0022] Figure 7 It is a schematic diagram of the elastic-plastic structure of the utility model;

[0023] Figure 8 It is a force-displacement curve diagram of the elastic-plastic structure of the utility model;

[0024] Fig. 9 A schematic diagram of the working state of the elastic-plastic structure of the utility model;

[0025] Fig.10 It is a second schematic diagram of the working state of the elastic-plastic structure of the utility model;

[0026] Fig.11 The third schematic diagram is a working state diagram of the elastic-plastic structure of the utility model;

[0027] Among them: 100-reinforced component, 1-reinforcement plate, 2-fixed end anchor, 3-mid-span support mechanism, 4-first mounting plate, 5-second mounting plate, 6-nut, 7-fixing screw, 8-first mounting part, 9-upper frame, 10-upper fixing nut, 11-upper support movable plate, 12-elastoplastic structure, 13-lower support movable plate, 14-support screw, 15-adjusting nut, 16-lower frame, 17-connecting rod, 18-sliding block, 19-lower fixing nut, 20-cover plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The purpose of the utility model is to provide a reinforcement device to solve the problems existing in the above-mentioned prior art, with a simple structure and strong operability, and can improve the ultimate strength and ductility of the reinforced component. In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] like Figures 1 to 11 As shown: This embodiment provides a reinforcement device that can be used to reinforce reinforced concrete flexural members, including reinforced concrete simply supported beams, mid-span areas of continuous beams, and negative bending moment areas at continuous beam supports, including a reinforcement plate 1, a fixed end anchor 2 and a mid-span top support mechanism 3. The reinforcement plate 1 is made of carbon fiber reinforced composite material. The two ends of the reinforcement plate 1 are respectively connected to the reinforced member 100 through a fixed end anchor 2, and the middle part of the reinforcement plate 1 is connected to the reinforced member 100 through the mid-span top support mechanism 3. The mid-span top support mechanism 3 is used to prestress the reinforcement plate 1.

[0031] Specifically, in the present embodiment, there are at least two fixed-end anchors 2, which are 300 mm long, 120 mm wide and 20 mm thick in total. The fixed-end anchor 2 comprises a first mounting plate 4, a second mounting plate 5, a nut 6 and a fixing screw 7, one end of the fixing screw 7 being used to be embedded in the reinforced component 100, the first mounting plate 4 and the second mounting plate 5 being used to clamp the reinforcement plate 1, the upper and lower surfaces of the reinforcement plate 1 being provided with a glue layer, a cover plate 20 being provided under the second mounting plate 5, the fixing screw 7 sequentially passes through the first mounting plate 4, the second mounting plate 5 and the cover plate 20, the nut 6 is threadedly connected to the fixing screw 7, so as to fix the first mounting plate 4, the reinforcement plate 1, the second mounting plate 5 and the cover plate 20, and the setting of the cover plate 20 enables the fixed-end anchor 2 to be subjected to uniform force.

[0032] In this embodiment, the lower surface of the first mounting plate 4 and the upper surface of the second mounting plate 5 are both corrugated, and the lower surface of the first mounting plate 4 and the upper surface of the second mounting plate 5 match in shape.

[0033] In this embodiment, the reinforcement plate 1 includes a first mounting portion 8, a supporting portion, and a second mounting portion, which are arranged in sequence. The first mounting portion 8 and the second mounting portion are both used to connect with the fixed end anchor 2, and the supporting portion is used to connect with the mid-span support mechanism 3. The shapes of the first mounting portion 8 and the second mounting portion match the shape of the lower surface of the corresponding first mounting plate 4. Through the shape settings of the lower surface of the first mounting plate 4, the upper surface of the second mounting plate 5, the first mounting portion 8, and the second mounting portion, the reinforcement plate 1 will not slide relative to the fixed end anchor 2.

[0034] During installation, first, the first mounting plate 4 is put onto the fixing screws 7 embedded in the reinforced component 100 through ten bolt holes, and then the second mounting plate 5 is also put onto the fixing screws 7, and the reinforcement plate 1 is passed through the first mounting plate 4 and the second mounting plate 5. Finally, ten nuts 6 are respectively put onto the ten fixing screws 7 and tightened, so that the first mounting plate 4 and the second mounting plate 5 are tightly combined to fix the reinforcement plate 1. During the tensioning process, the anchoring section of the reinforcement plate 1 is pressed tightly against the first mounting plate 4 and the second mounting plate 5 due to the action of axial tension, which effectively increases the positive pressure between the reinforcement plate 1 and the first mounting plate 4 and the second mounting plate 5, thereby better fixing the reinforcement plate 1.

[0035] In this embodiment, the mid-span supporting mechanism 3 can be made of metal material, and the mid-span supporting mechanism 3 includes an anti-buckling bracket, an upper supporting movable plate 11, an elastic-plastic structure 12, a lower supporting movable plate 13 and two supporting screws 14. The anti-buckling bracket is used to connect with the reinforced component 100. The two ends of the supporting screw 14 are respectively threadedly connected with the anti-buckling bracket. The lower surface of the upper supporting movable plate 11 can contact the reinforcement plate 1. The upper supporting movable plate 11 is bolted to the upper end of the elastic-plastic structure 12, and the lower supporting movable plate 13 is bolted to the lower end of the elastic-plastic structure 12. The upper supporting movable plate 11 and the lower supporting movable plate 13 are both sleeved on the supporting screw 14. The supporting screw 14 is sleeved with an adjusting nut 15. The adjusting nut 15 is located on the lower supporting movable plate 13 and the lower end of the adjusting nut 15 is in contact with the lower supporting movable plate 13. By rotating the adjusting nut 15, the distance between the lower support movable plate 13 and the lower surface of the reinforced component 100 is adjusted, thereby driving the lower support movable plate 13, the elastic-plastic structure 12 and the upper support movable plate 11 to move, thereby supporting the reinforcement plate 1. The yield stiffness and yield strength of the elastic-plastic device can be adjusted to adapt to different situations.

[0036] In this embodiment, the elastic-plastic structure 12 is S-shaped. The characteristic of the elastic-plastic structure 12 is that when the mechanism reaches the yield strength, it enters a plastic state, at which time the displacement increases significantly, while the force increases slowly.

[0037] In this embodiment, the anti-buckling bracket adopts a trapezoidal geometric shape, and the anti-buckling bracket includes an upper frame 9, a lower frame 16, and a connecting rod 17 made of four angled steels. The upper frame 9 is located above the lower frame 16. The upper frame 9 includes four angle steels and a channel steel with holes. The angle steels are connected by pre-buried short bolts and are in full contact with the bottom surface of the reinforced component 100. The channel steels and the angle steels are welded to ensure the stability of the channel steels, thereby ensuring the stability of the elastic-plastic structure 12 during the test. The lower frame 16 has the same structure as the upper frame 9, and the lower frame 16 and the upper frame 9 jointly ensure the stability of the intermediate elastic-plastic structure 12. The upper frame 9 and the lower frame 16 are connected by a connecting rod 17, and the upper frame 9 and the lower frame 16 are respectively connected to the connecting rod 17 by bolts to achieve the detachability and flexibility of the device. The top support screw 14 is threadedly connected to the upper frame 9 and the lower frame 16 respectively.

[0038] When installing the mid-span support mechanism 3, first install the upper support movable plate 11 to ensure that the reinforcement plate 1 is only in contact with the chamfered surface of the upper support movable plate 11, then connect the upper support movable plate 11 and the lower support movable plate 13 to the elastic-plastic structure 12 by bolts respectively, then insert the support screw 14 into the sliding block 18 with the upper fixing nut 10 to contact the channel steel of the upper frame 9 in the anti-buckling frame, the upper fixing nut 10 is fixedly connected with the sliding block 18, the sliding block 18 contacts the upper frame 9, and the lower end of the support screw 14 is inserted into the lower fixing nut 19 on the lower frame 16, and finally tighten the upper fixing nut 10 and the lower fixing nut 19 to complete the installation of the support anchor. After installing the mid-span support mechanism 3, first apply prestress, at this time the lower support movable plate 13 drives the elastic-plastic structure 12 and then drives the upper reinforcement plate 1 to move downward, completing the tensioning of the reinforcement plate 1, at this time the elastic-plastic structure 12 still maintains an elastic state without large deformation. During the loading process, the force on the elastoplastic structure 12 gradually increases. Under the set reinforcement plate value, the elastoplastic structure 12 shows a yield state. Since the lower supporting movable plate 13 cannot move upward due to the influence of the adjusting nut 15, the upper supporting movable plate 11 gradually moves upward.

[0039] This embodiment can significantly improve the ductility of the reinforced component 100 based on the greatly improved ultimate strength through the excellent anchoring ability of the fixed ends and the tensioning ends at both ends and the elastic-plastic performance of the mid-span support mechanism 3. This embodiment mainly includes the following key features:

[0040] 1. Adjusting the yield strength and yield stiffness of the elastic-plastic structure 12: The yield strength and yield stiffness can be adjusted according to the actual situation and the design requirements of the reinforced component 100, so that the reinforced beam can achieve the expected ductility effect;

[0041] 2. Adjustment of the number of mid-span top support mechanisms 3: The reinforcement method of the mid-span top support mechanism 3 can be embodied as a single-point top support reinforcement method, a double-point top support reinforcement method or a multi-point top support reinforcement method, and adjustments are made according to actual conditions;

[0042] 3. Connection method of the fixed end anchor 2 and the mid-span supporting mechanism 3 with the reinforced member 100: The fixed end anchor 2 and the mid-span supporting mechanism 3 are both fixed to the surface of the reinforced member 100 by bolt connection;

[0043] 4. Connection method of the upper supporting movable plate 11, the lower supporting movable plate 13 and the elastic-plastic structure 12: the upper supporting movable plate 11 and the lower supporting movable plate 13 are respectively connected to the elastic-plastic structure 12 by bolts;

[0044] 5. Prestressing method: Prestressing is performed by rotating the adjusting nut 15.

[0045] The structure of this embodiment has the advantages of simple implementation method, excellent mechanical properties, strong designability, etc.

[0046] This embodiment provides a reinforcement method using a reinforcement device, comprising the following steps:

[0047] Step 1: determining the strength requirements and ductility requirements of the reinforced component 100 under specific conditions;

[0048] Step 2: Install the fixed end anchors 2 on both sides of the surface of the reinforced component 100, apply resin glue to the upper and lower surfaces of the first mounting portion 8 and the second mounting portion of the reinforcing plate 1, and pass the reinforcing plate 1 through the fixed end anchors 2, tighten the nut 6, and set a pre-tightening force of 350 N·m to complete the anchoring of the reinforcing plate 1 and the fixed end anchor 2;

[0049] Step three, select an elastic-plastic structure 12 with appropriate yield strength and yield stiffness, install the anti-buckling bracket and the upper support movable plate 11, ensure that the reinforcement plate 1 is only in contact with the chamfered surface of the upper support movable plate 11, connect the upper support movable plate 11 and the lower support movable plate 13 to the elastic-plastic structure 12 by bolts respectively, insert the adjusting screw into the sliding block 18 with the upper fixing nut 10, the adjusting screw contacts the channel steel of the upper frame 9, and then tighten the upper fixing nut 10 and the lower fixing nut 19 to complete the installation of the mid-span support mechanism 3;

[0050] Step four, turn the adjusting nut 15 to adjust the distance between the lower top support movable plate 13 and the surface of the reinforced component 100, and then the lower top support movable plate 13 drives the elastic-plastic structure 12 and the upper top support movable plate 11 to move downward, and the upper top support movable plate 11 drives the reinforcement plate 1 to move downward to reach the set prestress level, complete the tensioning of the reinforcement plate 1, and complete the reinforcement.

[0051] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A reinforcement device, characterized in that: It comprises a reinforcement plate, a fixed end anchor and a mid-span top support mechanism, wherein the two ends of the reinforcement plate are respectively connected to the reinforced member through one of the fixed end anchors, and the middle part of the reinforcement plate is connected to the reinforced member through the mid-span top support mechanism, and the mid-span top support mechanism is used to perform prestress tensioning on the reinforcement plate; The mid-span support mechanism includes an anti-buckling bracket, an upper support movable plate, an elastic-plastic structure, a lower support movable plate and a support screw. The anti-buckling bracket is used to connect to the reinforced component, and the two ends of the support screw are respectively threadedly connected to the anti-buckling bracket. The upper support movable plate can contact the reinforcement plate, the upper support movable plate is connected to the upper end of the elastic-plastic structure, and the lower support movable plate is connected to the lower end of the elastic-plastic structure. The upper support movable plate and the lower support movable plate are both mounted on the support screw, and an adjusting nut is mounted on the support screw, and the adjusting nut is located on the lower support movable plate.

2. The reinforcement device according to claim 1, characterized in that: The fixed-end anchor includes a first mounting plate, a second mounting plate, a nut and a fixing screw, one end of the fixing screw is used to be embedded in the reinforced component, the first mounting plate and the second mounting plate are used to clamp the reinforcement plate, the fixing screw passes through the first mounting plate and the second mounting plate in sequence, and the nut is threadedly connected to the fixing screw to achieve fixation of the first mounting plate, the reinforcement plate and the second mounting plate.

3. The reinforcement device according to claim 2, characterized in that: The lower surface of the first mounting plate and the upper surface of the second mounting plate are both corrugated, and the lower surface of the first mounting plate and the upper surface of the second mounting plate match in shape.

4. The reinforcement device according to claim 3, characterized in that: The reinforcement plate includes a first mounting portion, a supporting portion, and a second mounting portion which are arranged in sequence. The first mounting portion and the second mounting portion are both used to connect with the fixed end anchor, and the supporting portion is used to connect with the mid-span supporting mechanism.

5. The reinforcement device according to claim 4, characterized in that: The shapes of the first mounting portion and the second mounting portion match the shapes of the corresponding lower surfaces of the first mounting plate.

6. The reinforcement device according to claim 1, characterized in that: The elastic-plastic structure is S-shaped.

7. The reinforcement device according to claim 1, characterized in that: The anti-buckling support comprises an upper frame, a lower frame and a connecting rod, the upper frame is located above the lower frame, the upper frame and the lower frame are connected by the connecting rod, and the top support screw is threadedly connected to the upper frame and the lower frame respectively.

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