Tensile but not shear connector for non-modular sandwich insulation wall

Abstract

The present invention discloses a tensile but non-shear connector for a non-modular sandwich insulation wall, which is composed of a non-metallic rod-shaped connector and a hinge device sleeved on one end thereof, and the hinge device is located in a concrete wall panel on one side; the hinge device is composed of an isolation sleeve, an isolation cap, a steel pad and a nut, and the isolation sleeve, the steel pad and the nut are sequentially sleeved on the non-metallic rod-shaped connector, and the nut is fixed to the end of the non-metallic rod-shaped connector, and the nut and the end of the non-metallic rod-shaped connector are both accommodated in the isolation cap; or the hinge device is composed of an isolation sleeve and an anchoring steel bar, and the non-metallic rod-shaped connector located in the concrete wall panel on one side is both accommodated in the isolation sleeve, and the end of the non-metallic rod-shaped connector in the concrete wall panel on this side is designed as an enlarged head, and the corresponding side walls of the enlarged head and the isolation sleeve are provided with steel bar holes for the anchoring steel bar to pass through. The tensile but non-shear connector is clearly subjected to force, and the problem of the concrete wall panel on one side being constrained due to the strong shear stiffness of the connector is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sandwich insulation walls, in particular to a connector for sandwich insulation walls, specifically a non-modular type sandwich insulation wall tensile but non-shear connector composed of a non-metallic rod and a concrete hinged fixing device. Background Art

[0002] At present, the exterior walls of prefabricated buildings in my country generally use non-combined sandwich insulation walls, which are composed of outer leaf concrete wall panels located on the outer surface of the building, an insulation layer in the middle and inner leaf concrete wall panels on the inner side. The inner and outer leaf concrete wall panels are connected by connectors passing through the insulation layer. The inner leaf concrete wall panels are load-bearing walls, while the outer leaf concrete wall panels are non-load-bearing walls, which are supported on the inner leaf concrete wall panels through connectors.

[0003] The connector system for non-combined sandwich insulation wall is mainly divided into two categories. The first category is non-metallic (such as fiber reinforced composite plastic) connectors. Such connectors are fully in contact and anchored with the concrete on both sides of the insulation layer, and can resist both tension and shear. When the thickness of the insulation layer is not large or the temperature and shrinkage effect are large, due to the strong shear effect of the connector, the outer leaf concrete wall panel of the sandwich insulation wall is deformed and the inner leaf concrete wall panel is basically not deformed. The outer leaf concrete wall panel is constrained by the inner leaf concrete wall panel through the connector. When this constraint is strong, it will cause serious cracking or warping deformation of the outer leaf concrete wall panel, affecting the use function and durability of the wall. The second category is metal (such as stainless steel) connectors. Such connectors generally include rod-shaped and plate-shaped connectors. The former is mainly used for tension resistance, and the latter is mainly used for shear resistance. The force is relatively clear, which is convenient for realizing "non-combination". However, due to the large thermal conductivity of the material, metal connectors have a greater impact on the thermal performance of the wall, and the energy-saving effect is not as good as non-metallic connectors.

[0004] In summary, in order to make full use of the energy-saving advantages of non-metallic connectors, while solving the adverse effects of their existing stress mode on the free deformation of the outer leaf concrete wall panels, better achieve the design purpose of non-combined sandwich insulation walls, and ensure the use function and durability of the building exterior walls, it is necessary to propose a connector for sandwich insulation walls with a reasonable structure. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of non-combined sandwich insulation wall connector. By setting accessories with different functions, the end of the connector is hinged with the concrete of the inner concrete wall panel, and can rotate freely under the premise of ensuring reliable tensile anchoring of the connector, thereby realizing the function of the connector being tensile-resistant but not shear-resistant. In engineering applications, this tensile-resistant but not shear-resistant connector is used in conjunction with a centrally arranged special shear-resistant connector to form a sandwich insulation connector system with a reasonable structure and good energy-saving effect.

[0006] The tensile and non-shear resistant connector for the non-combinatorial sandwich insulation wall provided by the present invention is arranged in the inner leaf concrete wall panel, the insulation layer and the outer leaf concrete wall panel of the non-combinatorial sandwich insulation wall, and is composed of a non-metallic rod-shaped connector and a hinged device sleeved on the non-metallic rod-shaped connector extending into one side concrete wall panel, and the hinged device includes an isolation accessory and an anchoring accessory.

[0007] The anchoring accessories are used to transfer the tensile force borne by the non-metallic rod-shaped connectors and transmit the tensile force to the surrounding concrete body; the isolation accessories are used to isolate the non-metallic rod-shaped connectors from the surrounding concrete body and provide space for the non-metallic rod-shaped connectors to deform freely. The combination can achieve the purpose of the connectors resisting tension but not shearing.

[0008] Furthermore, the isolation accessory is composed of a first isolation sleeve and an isolation cap, and the anchoring accessory is composed of a steel pad and a nut; the first isolation sleeve, steel pad and nut are sequentially sleeved on the non-metallic rod-shaped connector along the direction from the insulation layer to one side of the concrete wall panel, and the nut is fixed to the end of the non-metallic rod-shaped connector by threading, and the nut and the end of the non-metallic rod-shaped connector are both accommodated in the isolation cap.

[0009] Or the isolation accessory is a second isolation sleeve, and the anchoring accessory is an anchoring steel bar; the non-metallic rod-shaped connectors located in the concrete wall panel on one side are all accommodated in the second isolation sleeve, and the ends of the non-metallic rod-shaped connectors in the concrete wall panel on this side are designed to be enlarged heads, and the enlarged heads and the corresponding side walls of the second isolation sleeve are provided with steel bar holes for the anchoring steel bars to pass through.

[0010] The present invention has the following advantages:

[0011] (1) The connector of the present invention is only tensile and not shear-resistant. It is used in conjunction with other connectors that are mainly shear-resistant to form a sandwich insulation connector system. Each connector performs its own function, the force is clear, and the design and calculation are convenient.

[0012] (2) The present invention completely solves the problem of deformation constraint of the outer leaf concrete wall panels caused by the large shear stiffness of traditional non-metallic connectors, avoids cracking and deformation of the outer leaf concrete wall panels of the sandwich insulation wall under the influence of temperature, shrinkage, etc., and effectively ensures the use function and durability of the sandwich insulation wall.

[0013] (3) Compared with metal connectors, the present invention has a low thermal conductivity, which effectively reduces the thermal bridge effect of the connectors, improves the thermal performance of the wall, and has a good energy-saving effect.

[0014] The present invention proposes a new type of connector for sandwich insulation walls, which can generally solve the problem of high shear stiffness of traditional non-metallic connectors, and is more conducive to realizing a non-combination stress mode of the sandwich insulation wall. At the same time, it takes advantage of the low thermal conductivity of non-metallic connectors to ensure that the wall has good thermal performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a tensile and non-shear resistant connector for a non-modular sandwich insulation wall according to Example 1 of the present invention.

[0016] Figure 2 (a) and (b) are Figure 1 An enlarged schematic diagram of the middle articulated device.

[0017] Figure 3 It is a schematic diagram of the overall structure of a tensile and non-shear resistant connector for a non-modular sandwich insulation wall according to Example 2 of the present invention.

[0018] Figure 4 yes Figure 3 Schematic diagram of cross section 1-1.

[0019] Figure 5 (a) and (b) are Figure 3 An enlarged schematic diagram of the middle articulated device.

[0020] Figure 6 (a) and (b) are schematic diagrams of the arrangement of the tensile but non-shearing connector of the present invention in a non-modular sandwich insulation wall. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the technical solution and the method of use of the present invention, the following is further described in conjunction with the accompanying drawings:

[0022] A non-combined type sandwich insulation wall tensile and non-shear connector is provided in Example 1 of the present invention. Figure 1 The connecting part is arranged in the inner leaf concrete wall panel 6, the insulation layer 5 and the outer leaf concrete wall panel 4 of the non-combined sandwich insulation wall, and is composed of a non-metallic rod-shaped connecting part 1 and a hinged device sleeved on the non-metallic rod-shaped connecting part 1 extending into the inner leaf wall. The hinged device includes an isolation accessory 2 and an anchoring accessory 3.

[0023] The non-metallic rod-shaped connector 1 in the present invention is made of non-metallic material with low thermal conductivity (such as glass fiber reinforced plastic, carbon fiber reinforced plastic, basalt fiber reinforced plastic, etc.), and the cross-section can be various forms such as circular, elliptical, polygonal, star-shaped, rectangular, etc.

[0024] The non-metallic rod-shaped connector 1 extends into and is anchored in the outer leaf concrete wall panel 4. As required, the end of the non-metallic rod-shaped connector 1 can generally be designed as an enlarged head to enhance the bonding and anchoring performance between the connecting rod and the concrete. The non-metallic rod-shaped connector 1 and the outer leaf concrete wall panel 4 are rigidly connected, that is, they can transmit tension, pressure, shear force, and bending moment.

[0025] The non-metallic rod-shaped connector 1 is hinged to the concrete of the inner leaf concrete wall panel 6 through a hinge device, that is, the connection between the two can only transmit axial force and shear force but not bending moment, and the non-metallic rod-shaped connector 1 can rotate freely around the connection.

[0026] The hinged device of this embodiment includes an isolation fitting 2 and an anchor fitting 3, both of which are located in the concrete of the inner concrete wall panel 6. Figure 2 , the isolation accessory 2 is composed of an isolation sleeve 21 and an isolation cap 22, and the anchoring accessory 3 is composed of a steel pad 31 and a nut 32. Among them, the isolation sleeve 21, the steel pad 31 and the nut 32 are sequentially sleeved on the non-metallic rod-shaped connector 1 along the direction from the insulation board 5 to the inner leaf concrete wall panel 6, and the nut 32 is fixed to the end of the non-metallic rod-shaped connector 1 by a threaded manner, and the nut 32 and the end of the non-metallic rod-shaped connector 1 are both accommodated in the isolation cap 22. The isolation sleeve 21 is located between the insulation layer 5 and the steel pad 31, and the isolation sleeve 21 is made of a hard non-metallic material (such as hard plastic, etc.) or an elastic non-metallic material with a low elastic modulus (such as rubber, polyethylene, etc.). When the isolation sleeve 21 is made of an elastic non-metallic material with a low elastic modulus, its inner side wall is set close to the non-metallic rod-shaped connector 1 (such as Figure 2 As shown in (a), the wall thickness of the isolation sleeve 21 is generally not less than 5 mm, and the deformation amount after the non-metallic rod-shaped connector 1 is compressed by the contact should be greater than the deformation requirement of the tensile but not shearing connector. When the isolation sleeve 21 is made of hard non-metallic material, a gap 7 is left between its inner wall and the non-metallic rod-shaped connector 1 (such as Figure 2 As shown in (b) above, the wall thickness of the isolation sleeve 21 is generally not less than 2 mm, and the minimum distance between the inner wall of the isolation sleeve 21 and the outer surface of the non-metallic rod-shaped connector 1 is 3 mm, and should be greater than the deformation requirement of the tensile but not shear-resistant connector. A flange is provided at the end of the isolation sleeve 21 in contact with the insulation layer 5 for positioning when installing the connector. The thickness and size of the steel pad 31 are determined based on the tensile force of the non-metallic rod-shaped connector 1 and the strength of concrete. The nut 32 is generally made of the same material as the non-metallic rod-shaped connector 1, and the threads of the two match to ensure a reliable connection. The isolation cap 22 is generally made of plastic, and its size is determined based on the nut 32.

[0027] The non-metallic rod-shaped connector 1 can withstand tensile force, which is transmitted to the steel pad 31 through the nut 32, and the steel pad 31 then transmits it to the directly contacted concrete body by bearing pressure. The non-metallic rod-shaped connector 1 can rotate freely through a hinge device, that is, the end extending into the outer leaf concrete wall panel 4 can be freely deformed along the in-plane direction with the outer leaf concrete wall panel 4. At the same time, the isolation accessory 2 isolates the non-metallic rod-shaped connector 1 and the concrete of the inner leaf concrete wall panel 6 and provides sufficient deformation space, so that the connector does not withstand shear force, and the purpose of the connector being tensile-resistant but not shear-resistant can be achieved comprehensively.

[0028] Example 2 of the present invention Figure 3 , 4 5. The hinged device arranged in the inner concrete wall panel 6 is composed of an isolation sleeve 02 and an anchoring steel bar 03. The non-metallic rod-shaped connectors 01 located in the inner concrete wall panel 6 are all accommodated in the isolation sleeve 02, and both ends of the non-metallic rod-shaped connectors 01 are designed as enlarged heads (see Figure 4 ), the enlarged head located in the inner concrete wall panel 6 and the corresponding side wall of the isolation sleeve 02 are provided with a steel bar hole for the anchor steel bar 03 to pass through. Similar to the above-mentioned embodiment 1, the non-metallic rod-shaped connector 01 in this embodiment is made of a non-metallic material with low thermal conductivity, and the isolation sleeve 02 adopts an elastic non-metallic isolation sleeve whose inner wall is tightly attached to the non-metallic rod-shaped connector 01, or the isolation sleeve 02 adopts a hard non-metallic isolation sleeve with a gap 07 between its inner wall and the non-metallic rod-shaped connector 01. The structure and size of the isolation sleeve are the same as those in embodiment 1, and the only difference is that the isolation sleeve 02 is additionally provided with a steel bar hole. The anchor steel bar 03 is generally not less than 6 mm in diameter and not less than 200 mm in length, and meets the anchoring force requirements, and is centrally and symmetrically arranged in the non-metallic rod-shaped connector 01.

[0029] The non-metallic rod-shaped connector 01 can withstand tensile force, which is transmitted to the concrete in full contact with it through the anchoring steel bar 03, so as to achieve reliable anchoring when under tension. At the same time, the isolation sleeve 02 completely isolates the non-metallic rod-shaped connector 01 from the surrounding concrete body, so that the non-metallic rod-shaped connector 01 can rotate freely around the anchoring steel bar 03 to form a hinge, so that the end of the non-metallic rod-shaped connector 01 extending into the outer leaf concrete wall panel 4 can deform freely with the outer leaf concrete wall panel 4 without bearing shear force, so that the purpose of the connector being tensile-resistant but not shear-resistant can be achieved comprehensively.

[0030] According to different specific embodiments, the method of using the non-modular sandwich insulation wall tensile non-shear connector provided by the present invention is as follows:

[0031] (1) Layout: See Figure 6The tensile but non-shear connectors 100 are evenly arranged within the plane of the wall, and the spacing is determined according to the tensile calculation. At the same time, shear connectors 200 that can withstand vertical shear force and shear connectors 300 that can withstand horizontal shear force are arranged inside the wall. The shear connectors (200, 300) can adopt existing plate-shaped or truss-type connectors, and non-metallic materials with low thermal conductivity are preferably used. When the overall influence of the connector system on the thermal performance of the wall is small or the thermal performance requirements of the wall are low, metal materials with relatively low thermal conductivity can also be used.

[0032] (2) Installation: The tensile non-shear connector of the present invention is generally used for prefabricated sandwich insulation wall panels. When installing the tensile non-shear connector, it is necessary to drill holes in the insulation board in advance, and then pass the tensile non-shear connector 100 through the insulation board, and then lay the insulation board with the tensile non-shear connector 100, and ensure that the tensile non-shear connector 100 is inserted into the concrete poured in the lower layer. After installation, the concrete around the tensile non-shear connector should be filled densely by rotation, extrusion, etc., to ensure that the connector is in full contact with the concrete, thereby ensuring the anchoring performance.

[0033] (3) When making a sandwich insulation wall, the outer concrete wall panel is usually facing downward and the inner concrete wall panel is facing upward. At this time, the hinged end of the tensile and non-shear connector is usually located inside the inner concrete wall panel (the above-mentioned methods are all in this way); when the inner concrete wall panel is facing downward and the outer concrete wall panel is facing upward, the hinged end of the tensile and non-shear connector is usually located inside the outer concrete wall panel. The specific method can be selected according to the needs of wall production.

[0034] In summary, the present invention realizes the tensile but not shearing performance of the non-metallic rod-shaped connectors for the sandwich insulation wall, makes its force clear, avoids the problem of the outer leaf wall of the sandwich insulation wall being constrained due to the strong shear stiffness of the connector, and allows the outer leaf wall to deform freely without being constrained by the inner leaf wall, thereby achieving the design purpose of the non-modular sandwich insulation wall.

[0035] In the description herein and in the accompanying drawings, the products and methods of the present invention are described as specific shapes, materials or process sequences, and some detailed parameters are provided for some specific embodiments for the purpose of illustration. However, it should be understood that these specific descriptions do not limit the technical solutions of the present invention; that is, changes and modifications of the shapes, materials or process sequences are still included in the spirit and scope of the present invention.

Claims

1. A tensile and non-shear connector for a non-modular sandwich insulation wall, characterized in that: It is composed of a non-metallic rod-shaped connector and a first hinge device sleeved on one end of the non-metallic rod-shaped connector, wherein the tensile but non-shearing connector is arranged in the inner leaf concrete wall panel, the insulation layer and the outer leaf concrete wall panel of the non-combined sandwich insulation wall, and passes through the insulation layer to connect the inner leaf concrete wall panel and the outer leaf concrete wall panel; The first hinge device includes an isolation accessory and an anchoring accessory, both of which are located in one side of the concrete wall panel; the isolation accessory is composed of a first isolation sleeve and an isolation cap, and the anchoring accessory is composed of a steel pad and a nut; the first isolation sleeve, the steel pad and the nut are sequentially sleeved on the non-metallic rod-shaped connector along the direction from the insulation layer to one side of the concrete wall panel, and the nut is fixed to the end of the non-metallic rod-shaped connector by threading, and the nut and the end of the non-metallic rod-shaped connector are both accommodated in the isolation cap; The isolation sleeve is made of hard non-metallic material or elastic non-metallic material; when the isolation sleeve is made of elastic non-metallic material, its inner wall is set close to the non-metallic rod-shaped connector, and its deformation after being compressed by the non-metallic rod-shaped connector should be greater than the deformation requirement of the tensile but not shear-resistant connector; when the isolation sleeve is made of hard non-metallic material, a gap is left between its inner wall and the non-metallic rod-shaped connector, and the distance between its inner wall and the outer surface of the non-metallic rod-shaped connector should be greater than the deformation requirement of the tensile but not shear-resistant connector; the end of the isolation sleeve in contact with the insulation layer is provided with a flange for positioning.

2. The tensile and non-shearing connector for non-modular sandwich insulation wall according to claim 1, characterized in that: The first hinge device is replaced by a second hinge device, and the second hinge device is composed of a second isolation sleeve and anchoring steel bars, and both are located in a concrete wall panel on one side; the non-metallic rod-shaped connectors located in the concrete wall panel on this side are all accommodated in the second isolation sleeve, and the ends of the non-metallic rod-shaped connectors in the concrete wall panel on this side are designed as enlarged heads, and steel bar holes for the anchoring steel bars to pass through are opened at the corresponding positions of the enlarged head and the side walls of the second isolation sleeve.

3. The tensile and non-shearing connector for non-modular sandwich insulation wall according to claim 1 or 2, characterized in that: The non-metallic rod-shaped connector is made of glass fiber reinforced plastic, carbon fiber reinforced plastic or basalt fiber reinforced plastic, and the cross-section of the non-metallic rod-shaped connector is circular, elliptical, polygonal, star-shaped or rectangular; the end of the non-metallic rod-shaped connector located in the concrete wall panel on the other side is designed as an enlarged head.

4. The tensile and non-shearing connector for non-modular sandwich insulation wall according to claim 1, characterized in that: The size of the steel pad is determined based on the tensile force of the tensile but non-shearing connector and the concrete strength; the material of the nut is the same as that of the non-metallic rod-shaped connector.

5. The tensile and non-shearing connector for non-modular sandwich insulation wall according to claim 2, characterized in that: The diameter and length of the anchor steel bar are determined according to the force requirements of the tension anchor.

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