Anti-cracking FRP rib net structure for concrete floor

Abstract

An anti-cracking FRP rib net structure for a concrete floor, which relates to the technical field of floor construction. The anti-cracking FRP rib net structure comprises a plurality of FRP ribs and at least one flexible rope, wherein the plurality of FRP ribs are arranged at intervals in a first linear direction; the flexible rope is arranged in a second linear direction perpendicular to the first linear direction, and the flexible rope is formed by twisting a first rope body and a second rope body; and the FRP ribs are clamped and fixed by the first rope body and the second rope body which are twisted, so as to be connected together to form a rollable rib net structure; and head ends and tail ends of the first rope body and the second rope body that are connected to each other are fixed by encapsulaing members, respectively. According to the design, packaging and transportation can be significantly facilitated, the rib laying efficiency in a construction site is improved, and an improved concrete reinforcing effect is achieved. Moreover, a first rope body and a second rope body are connected to FRP ribs by means of twisting, automatic production can be thus achieved by means of a knitting machine, significantly improving the production efficiency and ahieving improved conntol over the product quality.

Description

A concrete floor crack-resistant FRP reinforcement mesh structure

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 11, 2023, with application number 202322464353.4 and invention name “A Concrete Floor Anti-cracking FRP Reinforcement Mesh Structure”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of ground construction technology, and in particular to an anti-cracking FRP reinforcement mesh structure for concrete floors. Background Art

[0003] In addition to strictly controlling the quality of concrete raw materials, reducing the amount of cement in concrete, adding concrete admixtures, and adding concrete expansion agents and shrinkage reducers, structural design control measures are also very important for the current anti-cracking treatment of concrete floor pouring.

[0004] The mainstream approach is to reinforce poured concrete with hot-rolled ribbed steel bars, which effectively control cracks. However, reinforced concrete structures have long been plagued by corrosion. When the steel corrodes, the tensile stress generated by the expansion of corrosion products exceeds the concrete's original tensile stress, causing the concrete to swell and crack, ultimately damaging the reinforced concrete structure. Practice has proven that even with rebar coated or plated, corrosion cannot completely prevent the problems caused by rebar corrosion, and this can significantly increase project costs.

[0005] Fiber-reinforced polymer (FRP) bars are favored by structural engineers due to their light weight, high strength and excellent corrosion resistance. In the early days, due to cost reasons, they were limited by structural economy and were only used in concrete structures under highly corrosive environments. However, with the advancement of fiber yarn and resin production and manufacturing technology and the increase in production capacity in recent years, the cost-effectiveness of FRP bars has become more obvious compared to steel bars. Coupled with the implementation of the carbon peak and carbon neutrality concepts, more and more structural designers have refocused on FRP bars and expanded their application areas to the reinforcement of ground concrete structures. However, during the construction and reinforcement laying process, FRP bars will encounter the same problems as traditional steel bars: they need to be laid one by one, construction workers need to bend over for a long time, resulting in high labor intensity, the spacing between adjacent bars is difficult to control, and the construction efficiency is low.

[0006] Chinese patent publication number CN108859169B discloses an FRP mesh and its manufacturing method. The mesh is composed of a plurality of interlaced weft and warp FRP bars. The weft FRP bars are spaced apart in the warp direction, and the warp FRP bars are arranged in groups of multiple bars in the weft direction. Each group of warp FRP bars is interlaced with multiple interlaced loops. The weft FRP bars are tightly interlaced within the corresponding interlaced loops. The warp FRP bars between adjacent interlaced loops are spirally wound at least once, forming alternating positive and negative spiral knots. Both sides of the interlaced loops are either positive or negative spiral knots. This FRP mesh design solves the labor-intensive, difficult to control spacing between adjacent bars, and low construction efficiency associated with bar-by-bar installation. However, because the weft FRP bars are fixed relative to each other by the warp FRP bars, the resulting FRP mesh is a rigid sheet structure. There are the following shortcomings: high production cost, unfriendly production environment (large VOC emissions), small transportation load and poor economy.

[0007] Summary of the Invention

[0008] In view of this, the purpose of this application is to provide a concrete floor crack-resistant FRP reinforcement mesh structure to solve the technical problems existing in the existing FRP reinforcement mesh production, packaging and transportation.

[0009] To achieve the above technical objectives, the present application provides a concrete floor anti-cracking FRP reinforcement mesh structure, comprising a plurality of FRP bars and at least one flexible rope;

[0010] The plurality of FRP bars are spaced apart along a first straight line direction;

[0011] The flexible rope is arranged along a second straight direction perpendicular to the first straight direction and is formed by twisting a first rope body and a second rope body;

[0012] Each of the FRP bars is clamped and fixed by the twisted first rope body and the second rope body, so as to be connected together to form a windable reinforcement network structure;

[0013] The head end and the tail end connected between the first rope body and the second rope body are fixed by sealing members respectively.

[0014] Furthermore, the first rope body and the second rope body are both made of fiber yarn.

[0015] Furthermore, the first rope body and the second rope body are both made of polyethylene filament yarn.

[0016] Furthermore, the first rope body and the second rope body are made of metal wires.

[0017] Furthermore, the first rope body and the second rope body are steel wires.

[0018] Furthermore, there are multiple flexible ropes, which are spaced apart along a second straight direction perpendicular to the first straight direction.

[0019] Furthermore, the number of the FRP bars is 20±10.

[0020] Furthermore, the number of the FRP bars is 20.

[0021] Furthermore, the total weight of the rib mesh structure is no more than 20 kg.

[0022] Furthermore, the sealing member is an aluminum sealing nail.

[0023] As can be seen from the above technical solutions, the concrete floor crack-resistant FRP reinforcement mesh structure designed in this application connects the spaced FRP bars together through a flexible rope formed by twisting the first and second rope bodies to form a reelable reinforcement mesh structure. Using a prefabricated reinforcement mesh structure as a concrete bottom crack-resistant reinforcement structure can well control the spacing between the FRP bars, greatly improving the construction process. When laying FRP bars, there is no need to lay them one by one and adjust the spacing as in the traditional way. The reinforcement mesh structure can be used by simply unfolding it. This can not only greatly improve the reinforcement laying efficiency at the construction site, but also achieve better concrete reinforcement effect. More importantly, the reinforcement mesh structure can be flexibly rolled and unfolded, greatly facilitating packaging and transportation, and making transportation and loading more economical. Moreover, the first and second rope bodies in this application are connected to the FRP bars by twisting. This connection method can be automated by a braiding machine, greatly improving production efficiency and better controlling product quality. Compared with the existing rigid FRP mesh structure design, the manufacturing cost is lower and the production environment is relatively more friendly (low volatile organic compound (VOC) emissions). BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] FIG1 is a perspective view of a concrete floor anti-cracking FRP reinforcement mesh structure provided in this application;

[0026] FIG2 is a front view of a concrete floor anti-cracking FRP reinforcement mesh structure provided in this application;

[0027] FIG3 is a partial structural perspective view of a concrete floor anti-cracking FRP reinforcement mesh structure provided in this application;

[0028] In the figure: 1, FRP reinforcement; 2, flexible rope; 21, first rope body; 22, second rope body. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the embodiments of the present application.

[0030] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0032] The embodiments of the present application disclose an anti-cracking FRP reinforcement mesh structure for concrete floors.

[0033] Referring to Figures 1 to 3, an embodiment of a concrete floor anti-cracking FRP reinforcement mesh structure provided in the present application includes:

[0034] A plurality of FRP bars 1 and at least one flexible cord 2.

[0035] The plurality of FRP bars 1 are spaced apart along a first straight direction, which is a direction perpendicular to the axial direction of the FRP bars 1 or can be understood as a transverse direction.

[0036] The flexible rope 2 is arranged along a second linear direction perpendicular to the first linear direction. Taking the first linear direction as the transverse direction as an example, the second linear direction is also the longitudinal direction. The flexible rope 2 and the FRP reinforcement 1 are arranged in a transverse and longitudinal distribution in the unfolded state.

[0037] The flexible rope 2 is formed by twisting a first rope body 21 and a second rope body 22 , which can be understood as being formed by twisting two rope bodies.

[0038] Each FRP bar 1 is clamped and fixed by a twisted first rope body 21 and a second rope body 22, connecting them together to form a windable reinforcement network structure; the head and tail ends of the first rope body 21 and the second rope body 22 are respectively fixed by sealing parts (not shown in the figure). The specific implementation method is: each FRP bar 1 has a first rope body 21 and a second rope body 22 at the top and bottom, respectively, and the first rope body 21 and the second rope body 22 are continuously twisted with each other. After the last FRP bar 1 in a group is woven, the twisted flexible rope 2 is fixed at both ends using sealing parts to prevent it from unraveling, and then the twisted flexible rope 2 is cut. The woven group of FRP bars 1 can form a reinforcement network, which can then be rolled up and packaged and ready to be transported to the construction site for use.

[0039] The concrete floor anti-cracking FRP reinforcement mesh structure designed in this application connects the spaced FRP bars 1 together through a flexible rope 2 twisted from a first rope body 21 and a second rope body 22 to form a rollable reinforcement mesh structure. Using a prefabricated reinforcement mesh structure as a concrete bottom anti-cracking reinforcement structure can effectively control the spacing between the FRP bars 1, greatly improving the construction process. When laying the FRP bars 1, there is no need to lay them one by one and adjust the spacing as traditionally done. The reinforcement mesh structure can be deployed immediately after it is laid. This not only greatly improves the reinforcement laying efficiency at the construction site, but also achieves a better concrete reinforcement effect. More importantly, the designed reinforcement mesh structure can be flexibly rolled and unfolded, greatly facilitating packaging and transportation, and achieving better transportation and loading economy. Moreover, the first rope body 21 and the second rope body 22 in the present application are connected to the FRP reinforcement 1 by twisting. This important connection improvement method can be automated through a braiding machine, greatly improving production efficiency and better controlling product quality. Compared with the existing rigid FRP mesh structure design, the manufacturing cost is lower and the production environment is relatively more friendly (the emission of volatile organic compounds (VOC) is small).

[0040] The above is Example 1 of a concrete floor anti-cracking FRP reinforcement mesh structure provided by the embodiments of the present application. The following is Example 2 of a concrete floor anti-cracking FRP reinforcement mesh structure provided by the embodiments of the present application. Please refer to Figures 1 to 3 for details.

[0041] Based on the solution of the above embodiment 1:

[0042] Furthermore, the first rope 21 and the second rope 22 can both be made of fiber yarn, that is, synthetic fiber yarn, such as polyester, nylon, acrylic, nylon, polypropylene, spandex, etc. The first rope 21 and the second rope 22 can be a single fiber yarn, or both can be made of multiple twisted fiber yarns.

[0043] Furthermore, the first rope body 21 and the second rope body 22 are preferably made of polyethylene filament yarn. This design has a better cost-effectiveness and is conducive to reducing manufacturing costs.

[0044] Furthermore, the first rope body 21 and the second rope body 22 can also be made of metal wires. Similarly, the first rope body 21 and the second rope body 22 can be a single metal wire, or both can be formed by twisting multiple metal wires.

[0045] Furthermore, the first rope body 21 and the second rope body 22 are steel wires.

[0046] Compared with the rib mesh structure prepared by fiber yarn, the rib mesh structure prepared by metal wire is difficult to roll up and package, which is not suitable for transportation. At the same time, the introduction of metal wire will also cause corrosion problems. Therefore, in the actual application of this application, fiber yarn is preferably used to prepare the first rope body 21 and the second rope body 22.

[0047] Furthermore, in order to improve the reliability of the connection, the flexible rope 2 can be designed to be multiple and spaced apart along a second straight line direction perpendicular to the first straight line direction, so as to achieve a horizontal and vertical staggered distribution with the FRP bars 1. The number and spacing of the flexible ropes 2 can be designed according to the number and length of the FRP bars 1.

[0048] Furthermore, the number of FRP bars 1 in each group is 20±10, preferably 20, which is determined by the diameter and single length of the FRP bars 1. In addition, it is preferred to ensure that the total weight of the reinforcement network structure composed of each group of FRP bars 1 is controlled within 20 kg to facilitate subsequent laying by construction workers.

[0049] In the present application, the FRP bars 1 can be selected from FRP bars with a diameter of 6 mm to 19 mm, and further selected from glass fiber reinforced polymer bars with a diameter of 10 mm or 13 mm. The spacing between adjacent FRP bars can be set to 0 mm to 600 mm, and further set to 300 to 500 mm. The above preferred solution is obtained by fully considering the actual conditions of the construction site and the cost-effectiveness of the reinforcement solution design. Those skilled in the art can make changes to the design based on this.

[0050] Furthermore, with respect to the design of the sealing member, it can be an aluminum sealing nail.

[0051] The above is a detailed introduction to the anti-cracking FRP reinforcement mesh structure for concrete floors provided by this application. For those skilled in the art, based on the ideas of the embodiments of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on this application.

Claims

1. A concrete floor anti-cracking FRP reinforcement mesh structure, characterized in that: It comprises a plurality of FRP bars (1) and at least one flexible rope (2); A plurality of the FRP bars (1) are arranged at intervals along a first straight line direction; The flexible rope (2) is arranged along a second straight line direction perpendicular to the first straight line direction, and is formed by twisting a first rope body (21) and a second rope body (22); Each of the FRP tendons (1) is clamped and fixed by the twisted first rope body (21) and the second rope body (22) to be connected together to form a windable tendon network structure; The head end and the tail end connected between the first rope body (21) and the second rope body (22) are fixed by sealing members respectively.

2. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1 is characterized in that: The first rope body (21) and the second rope body (22) are both made of fiber yarn.

3. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 2 is characterized in that: The first rope body (21) and the second rope body (22) are both made of polyethylene filament yarn.

4. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1, characterized in that: The first rope body (21) and the second rope body (22) are made of metal wires.

5. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 4 is characterized in that: The first rope body (21) and the second rope body (22) are steel wires.

6. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1, characterized in that: The flexible ropes (2) are multiple and are arranged at intervals along a second straight line direction perpendicular to the first straight line direction.

7. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1, characterized in that: The number of the FRP bars (1) is 20±10.

8. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 7, characterized in that: The number of the FRP bars (1) is 20.

9. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1, characterized in that: The total weight of the rib mesh structure is no more than 20 kg.

10. The concrete floor anti-cracking FRP reinforcement mesh structure according to claim 1, characterized in that: The sealing piece is an aluminum sealing nail.

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