Sandwich composite exterior wall panel connector tension-shear combined strength test device and method

Abstract

The application discloses a kind of sandwich composite outer wall board connecting piece pull-shear combined strength test device and method, it is related to the technical field of fabricated concrete structure in building industry, device includes outer leaf and inner leaf by connecting piece connection;The bottom end of inner leaf has inner leaf horizontal support, and the bottom end of outer leaf has gap with inner leaf horizontal support;Between inner leaf horizontal support and outer leaf, or between inner leaf horizontal support and the loading beam fixed at the top of outer leaf, loading mechanism is connected, counterweight is arranged on loading beam;Force sensor is arranged on loading mechanism, and displacement meter for detecting vertical displacement is arranged between outer leaf and inner leaf.Test method applies tension to loading mechanism, required tension / shear ratio is obtained in connecting piece, continues to load to obtain shear V-displacement d curve, and obtains failure strength;Different loading positions are selected, different tension / shear ratio and failure strength of different ratio are obtained, and connecting piece tension-shear failure curve is formed.

Description

Technical Field

[0001] This invention relates to the field of prefabricated concrete structure technology in the construction industry, and more specifically to a device and method for obtaining the tensile-shear combined stress and failure strength of concrete composite exterior wall panel connectors through unidirectional loading. Background Technology

[0002] Prefabricated construction is the main development direction of my country's construction industry. Concrete sandwich composite exterior wall panels have advantages such as high strength, good thermal insulation, sound insulation, and waterproofing, making them an important component of prefabricated buildings. A concrete sandwich composite exterior wall panel consists of an inner concrete leaf panel (indoor side, thickness not less than 50mm), an outer concrete leaf panel (outdoor side, thickness not less than 50mm), and a sandwich insulation layer and connectors between the two concrete panels. Connectors are mainly of two types: stainless steel connectors and fiber-reinforced plastic (FRP) connectors. FRP connectors have higher strength and better thermal insulation performance than stainless steel connectors, therefore, they are more widely used. The thickness of the insulation layer is determined by the insulation material and the climate zone of the building. For example, the insulation layer is thicker in severely cold regions and thinner in hot-summer-cold-winter regions, generally ranging from 50mm to 150mm. The thickness of the insulation layer is the distance between the connectors on the inner and outer leaf panels.

[0003] The connectors link the inner and outer leaf plates of the sandwich composite wall panel, and their reliable connection is crucial to the design of the panel. The connectors are subjected to shear forces parallel to the wall panel and tensile forces perpendicular to it. Only by determining the failure strength of the connectors under different tension-shear combinations can the connectors be rationally selected and arranged in the wall panel design, ensuring the safety, economy, and applicability of the sandwich composite wall panel design. The tension-shear combination of the connectors generally requires applying a tensile force perpendicular to the wall panel direction while simultaneously applying a shear force parallel to it. Controlling the simultaneous and proportional application of these two forces is also quite complex.

[0004] Therefore, there is currently no failure criterion for the tension-shear combination of connectors, which brings difficulties to the arrangement of connectors in the design of sandwich composite wall panels and affects the scientificity, rationality and economy of connector design. Obtaining the tension-shear combination strength of connectors through simple and reliable tests is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a tensile-shear combined strength testing device and method for sandwich composite exterior wall panel connectors, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tensile-shear combined strength testing device for a sandwich composite exterior wall panel connector, comprising an outer leaf plate and an inner leaf plate connected by connectors;

[0008] The inner blade plate has a horizontal support at its bottom end, which keeps it stable during the test. There is a gap between the horizontal support of the inner blade plate and the bottom end of the outer blade plate, which allows for vertical deformation of the outer blade plate.

[0009] A loading mechanism is connected between the horizontal support of the inner blade plate and the outer blade plate, or between the horizontal support of the inner blade plate and the loading beam fixed at the top of the outer blade plate, and a counterweight is provided on the loading beam;

[0010] The loading mechanism is equipped with a force sensor, and a displacement meter for detecting vertical displacement is provided between the outer blade and the inner blade.

[0011] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, an L-shaped roller support is fixed on the outer leaf plate, and a roller plate support corresponding to the L-shaped roller support is fixed on the inner leaf plate, with a roller held between the roller plate support and the L-shaped roller support.

[0012] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, the loading mechanism includes a loading steel rod, which passes through the horizontal support of the inner leaf plate, and a loading steel rod fixing anchor is locked at the bottom end of the loading steel rod, the loading steel rod fixing anchor abutting against the bottom surface of the horizontal support of the inner leaf plate; the loading steel rod passes upward through the outer leaf plate or the loading beam and is locked by the loading steel rod loading anchor, the loading steel rod loading anchor abutting against the top surface of the outer leaf plate or the loading beam.

[0013] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, the force sensor is sleeved on the loading steel rod and clamped between the loading anchor of the loading steel rod and the top surface of the outer leaf plate or the loading beam.

[0014] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, the inner leaf plate is horizontally supported with a loading groove for the loading steel rod to pass through.

[0015] Preferably, in the above-mentioned tensile-shear combined strength test device for sandwich composite exterior wall panel connectors, the bottom surface of the inner leaf plate is fixed with a loading steel rod fixing anchor bearing plate corresponding to the loading groove.

[0016] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, the top surface of the outer leaf plate is higher than the top surface of the inner leaf plate, a displacement measuring plate is fixed on the top surface of the outer leaf plate, and the displacement measuring plate is installed between the inner leaf plate and the inner leaf plate at a position above the inner leaf plate.

[0017] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, the counterweight is connected to the loading beam via a counterweight hanger and a counterweight hanger fixing bolt.

[0018] Preferably, in the above-mentioned tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, a wall panel reinforcing steel plate is fixed to the top surface of the outer leaf plate, and the wall panel reinforcing steel plate has vertical holes corresponding to the vertical through holes of the outer leaf plate, and wall panel reinforcing steel plate has connecting holes; a loading beam and wall panel connecting plate is fixed to one end of the loading beam, and the loading beam and wall panel connecting plate has connecting holes, and loading beam connecting bolts pass through the loading beam and wall panel connecting holes and the wall panel reinforcing steel plate connecting holes to fasten the loading beam and wall panel connecting plate to the wall panel reinforcing steel plate, and loading beam loading holes are provided on the loading beam.

[0019] This invention also provides a method for testing the tensile-shear combined strength of connectors for sandwich composite exterior wall panels, specifically including the following steps:

[0020] S1. Prepare test specimens according to the thickness of the inner and outer leaf plates of the sandwich composite wall panel for engineering and the length of the connectors. Select two connectors. Generally, the distance between the two connectors should not be less than 500mm. The distance between the connectors and the edges of the concrete inner and outer leaf plates should not be less than 250mm. The distance between the connectors and the installation position of the test device should not be less than 250mm.

[0021] S2, connecting the loading beam and the outer leaf plate;

[0022] S3. Determine the size and position of the counterweight based on the tension / shear force ratio, and install the counterweight on the loading beam;

[0023] S4. Determine the position of the loading mechanism based on the tension / shear ratio, and install the loading mechanism, force sensor, and displacement gauge;

[0024] S5. Apply tension to the loading mechanism to obtain the required tension / shear ratio in the connector. Continue loading to obtain the shear force V-displacement d curve and obtain the failure strength. Select different loading positions to obtain different tension / shear ratios and failure strengths with different ratios, forming the tension-shear failure curve of the connector.

[0025] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a device and method for testing the tensile-shear combined strength of sandwich composite exterior wall panel connectors, which has the following beneficial effects:

[0026] 1. The invention provides a device and method that simultaneously obtains tensile and shear forces on the connector by applying a vertical force, while maintaining a constant tensile-shear ratio during loading. By adjusting the loading point position, different tensile / shear ratios can be obtained, leading to the failure strength under different tensile / shear ratios, and thus the failure curve under combined tensile-shear stress. This provides a basis for the design of sandwich composite wall panels and the scientific and rational arrangement of connectors.

[0027] 2. By placing the wall panel in different corrosive environments, the aging performance of the connectors under different corrosive environments can also be obtained.

[0028] 3. The method provided by this invention only requires applying tension at one point to obtain the tension-shear force of the connector. It is simple to operate, produces high-precision data, is economical and applicable, and has strong applicability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 The attached figure is a structural schematic diagram of the tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors provided by the present invention;

[0031] Figure 2 The attached figure is an exploded view of the tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors provided by the present invention;

[0032] Figure 3 The attached figure is a structural cross-sectional view of the tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors provided by the present invention;

[0033] Figure 4 The attached figure is a schematic diagram of the wall panel thickness according to Embodiment 1 provided by the present invention;

[0034] Figure 5 The attached figure is a schematic diagram of pure shearing in Embodiment 1 provided by the present invention;

[0035] Figure 6 The attached figure is a schematic diagram of the center loading of the outer leaf plate in Embodiment 1 of the present invention;

[0036] Figure 7The attached figure is a schematic diagram of external loading on the outer leaf plate of Embodiment 1 provided by the present invention;

[0037] Figure 8 The attached figure is a schematic diagram of the shear force-displacement curve Vd of Embodiment 1 provided by the present invention;

[0038] Figure 9 The attached figure is a schematic diagram of the failure curve under tension-shear combination of Embodiment 1 provided by the present invention.

[0039] in:

[0040] 1—Connector; 2—Outer leaf plate; 3—Inner leaf plate; 3-2—Inner leaf plate horizontal support; 3-3—Loading groove; 3-4—Loading steel rod fixing anchor bearing plate; 4-1—Roller L-shaped support; 4-2—Roller; 4-3—Roller flat plate support; 5—Wall panel reinforcing steel plate; 5-1—Wall panel vertical hole; 5-2—Wall panel reinforcing steel plate connecting hole; 6—Loading beam connecting bolt; 7—Loading beam; 7-1—Loading beam loading hole; 7-2—Loading beam and wall panel connecting plate; 7-3—Loading beam and wall panel connecting hole; 8-1—Counterweight; 8-2—Counterweight rod; 8-3—Counterweight rod fixing bolt; 9-1—Loading steel rod; 9-2—Loading steel rod loading anchor; 9-3—Loading steel rod fixing anchor; 10—Force sensor; 11—Displacement gauge; 12—Displacement measuring plate. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] See appendix Figure 1 To be continued Figure 3 This invention discloses a tensile-shear combined strength testing device for sandwich composite exterior wall panel connectors, comprising an outer leaf plate 2 and an inner leaf plate 3 connected by a connector 1;

[0043] The bottom end of the inner blade plate 3 has an inner blade plate horizontal support 3-2, and there is a gap between the inner blade plate horizontal support 3-2 and the bottom end of the outer blade plate 2.

[0044] A loading mechanism is connected between the inner blade horizontal support 3-2 and the outer blade 2, or between the inner blade horizontal support 3-2 and the loading beam 7 fixed at the top of the outer blade 2. A counterweight 8-1 is provided on the loading beam 7.

[0045] A force sensor 10 is provided on the loading mechanism, and a displacement meter 11 for detecting vertical displacement is provided between the outer blade 2 and the inner blade 3.

[0046] To further optimize the above technical solution, an L-shaped roller support 4-1 is fixed on the outer blade plate 2, and a flat roller support 4-3 corresponding to the L-shaped roller support 4-1 is fixed on the inner blade plate 3. A roller 4-2 is held between the flat roller support 4-3 and the L-shaped roller support 4-1.

[0047] To further optimize the above technical solution, the loading mechanism includes a loading steel rod 9-1, which passes through the inner leaf plate horizontal support 3-2. The bottom end of the loading steel rod 9-1 is locked with a loading steel rod fixing anchor 9-3, which abuts against the bottom surface of the inner leaf plate horizontal support 3-2. The loading steel rod 9-1 passes upward through the outer leaf plate 2 or the loading beam 3-3 and is locked by the loading steel rod loading anchor 9-2, which abuts against the top surface of the outer leaf plate 2 or the loading beam 7.

[0048] To further optimize the above technical solution, the force sensor 10 is mounted on the loading steel rod 9-1 and clamped between the loading anchor 9-2 of the loading steel rod and the top surface of the outer leaf plate 2 or the loading beam 7.

[0049] To further optimize the above technical solution, the inner leaf plate horizontal support 3-2 is provided with a loading groove 3-3 for the loading steel rod 9-1 to pass through.

[0050] To further optimize the above technical solution, the bottom surface of the inner leaf plate horizontal support 3-2 is fixed with a loading steel rod fixing anchor bearing plate 3-4 corresponding to the loading groove 3-3.

[0051] To further optimize the above technical solution, the top surface of the outer blade plate 2 is higher than the top surface of the inner blade plate 3. A displacement measuring plate 12 is fixed on the top surface of the outer blade plate 2. A displacement meter 11 is installed between the displacement measuring plate 12 and the inner blade plate 3 at a position above the inner blade plate 3.

[0052] To further optimize the above technical solution, the counterweight 8-1 is connected to the loading beam 7 via the counterweight rod 8-2 and the counterweight rod fixing bolt 8-3.

[0053] To further optimize the above technical solution, a wall panel reinforcing steel plate 5 is fixed to the top surface of the outer leaf plate 2. The wall panel reinforcing steel plate 5 has a vertical hole 5-1 corresponding to the vertical through hole of the outer leaf plate 2, and a wall panel reinforcing steel plate connection hole 5-2 is also provided on the wall panel reinforcing steel plate 5. One end of the loading beam 7 is fixed with a loading beam and wall panel connecting plate 7-2. The loading beam and wall panel connecting plate 7-2 has a loading beam and wall panel connection hole 7-1. The loading beam connecting bolt 6 passes through the loading beam and wall panel connection hole 7-1 and the wall panel reinforcing steel plate connection hole 5-2 to fasten the loading beam and wall panel connecting plate 7-2 to the wall panel reinforcing steel plate 5. The loading beam 7 has a loading beam loading hole 7-1.

[0054] The tensile-shear combined strength test method for sandwich composite exterior wall panel connectors provided in this embodiment specifically includes the following steps:

[0055] S1. Prepare test specimens according to the thickness of the inner and outer leaf plates and the length of the connectors of the sandwich composite wall panel for engineering. The test specimens include outer leaf plate 2, inner leaf plate 3, connector 1 connecting the inner and outer leaf plates, roller 4-2 connecting the inner leaf plate 3 and the outer leaf plate 2, L-shaped support 4-1 and flat support 4-3. The inner leaf plate 3 is L-shaped. The inner leaf plate horizontal support 3-2 has a groove in the middle for installing the loading steel rod 9-1 and the loading steel rod fixing anchor 9-3. There is a wall panel reinforcing steel plate 5 at the top middle position of the outer leaf plate 2, with a vertical through hole in the middle for loading.

[0056] S2, connecting loading beam 7 and outer leaf plate 2;

[0057] S3. Determine the size and position of counterweight 8-1 according to the tension / shear ratio, and install counterweight 8-1 on loading beam 7 through counterweight rod 8-2 and counterweight rod fixing bolt 8-3;

[0058] S4. Determine the position of loading steel rod 9-1 according to the tension / shear ratio, install loading steel rod 9-1, and install the lower end of loading steel rod fixing anchor 9-3 under the loading steel rod fixing anchor bearing plate 3-4 of inner leaf plate 3. The upper end passes through loading beam 7, install force sensor 10 and loading steel rod loading anchor 9-2, and install displacement meter 11.

[0059] S5. Apply tension to the loading steel rod 9-1 using a jack to obtain the required tension / shear ratio in the connector. Continue loading to obtain the shear force V-displacement d curve and obtain the failure strength. Select different tension / shear ratios to obtain failure strengths with different ratios, forming the tension-shear failure curve of the connector.

[0060] Example 1:

[0061] Concrete sandwich composite wall panel inner leaf plate thickness t i Thickness of outer blade (t) e Insulation interlayer thickness t s The length of the connector between the inner and outer blades is t. s Since the strength of the insulation layer is almost zero, it was not considered in the design. Therefore, no sandwich layer was placed in the test; instead, an empty layer was used, as shown in the attached diagram. Figure 4 As shown.

[0062] Since the inner and outer blades are concrete slabs, their bending stiffness is almost infinite relative to the bending stiffness of the connectors. For example, if the inner concrete blade is 50mm thick, the connector spacing is 500mm, the connector diameter is 12mm, and the sandwich layer thickness is 80mm, the stiffness of the inner blade is approximately... The stiffness of the connector is approximately: The bending stiffness of the connector is only 1 / 500 of that of the concrete wall panel. Therefore, the bending moment at the midpoint of the connector under shear force can be considered zero. The center of the roller is located at the midpoint of the sandwich layer. The line connecting the midpoint of the connector and the center of the roller, known as the centerline CC, is the starting point for moment calculation. The vertical distance between the connector and the roller is H.

[0063] 1. Pure cutting, see appendix. Figure 5 :

[0064] The outer leaf plate has a weight of G0 and a distance of D0 from the centerline CC. A counterweight G1 is suspended by loading beam 7 and located on the other side of the center CC, at a distance of D1 from the center CC. With the center of gravity at the midline CC, the initial shear force on a single connector is:

[0065] Then, a tensile force is applied to the loading steel rod 9-1 using a jack. The center of the force coincides with the centerline CC, and the eccentricity of the force is D. F =0. Using force sensor 10 to measure the tensile force F and displacement gauge 11 to measure the displacement d, the shear force on a single connector is obtained as follows:

[0066]

[0067] The tension in the connector is T = 0.

[0068] Gradually increase the tensile force F, record the shear force V and displacement d to obtain the Vd curve, until the load reaches its maximum, and obtain the maximum shear force V of the connector. u and the corresponding displacement d u As attached Figure 8 As shown. V u It refers to the pure shear bearing capacity of the connector.

[0069] 2. Center loading of the outer leaf plate, see appendix. Figure 6 :

[0070] The outer blade weighs G0 and is located at a distance D0 from the centerline CC. The initial shear force on a single connector is:

[0071]

[0072] Then, by applying a pulling force with a jack, the center of the force coincides with the center of the outer blade, and the eccentricity of the force is D. F =D0. Using force sensor 10 to measure the tensile force F and displacement gauge 11 to measure the displacement d, the shear force on a single connector is obtained as follows:

[0073]

[0074] The tensile force of the connector is:

[0075]

[0076] Throughout the loading process, the ratio of tensile force to shear force remains constant: For example, if D0 = 100mm and H = 300mm, then the ratio of tensile force to shear force in the connector will always be 1 / 3.

[0077] Plot the Vd curve during the loading process to obtain the maximum shear force V. u and the corresponding displacement d u At the same time, the maximum tensile force is obtained.

[0078] 3. Increase the tension-shear ratio T / V, see appendix. Figure 7 :

[0079] The outer leaf plate has a weight of G0 and a distance of D0 from the centerline CC. A counterweight G1 is suspended on the same side of the center CC by the loading beam 7, and is a distance of D1 from the center CC. A tensile force F is then applied by a jack, and the distance between the center of the force and the centerline is D. F To ensure that the combined center of gravity of the outer blade and the counterweight coincides with the tensile force F applied by the jack, the counterweight position D1 should satisfy the following:

[0080]

[0081] Using force sensor 10 to measure the tensile force F and displacement gauge 11 to measure the displacement d, the shear force on a single connector is obtained as follows:

[0082]

[0083] The tensile force of the connector is:

[0084]

[0085] Throughout the loading process, the ratio of tensile force to shear force remains constant:

[0086] For example, D0 = 100mm, H = 300mm, D F =200mm, counterweight G1=G0, thus obtaining the counterweight distance. The ratio of tensile force to shear force in the connector is always 1.

[0087] Plot the Vd curve during the loading process to obtain the maximum shear force V. u and the corresponding displacement d u At the same time, the maximum tensile force is obtained.

[0088] Continue to increase the distance D from which the jack applies force. F A larger tensile / shear ratio can be obtained. It can be obtained (Pure cut) The failure strength values ​​under different tension / shear combinations (pure tension) were obtained, and the failure curves under the tension-shear combination were obtained, as shown in the attached figure. Figure 9 As shown.

[0089] With the tension-shear failure curve, the failure load can be determined in the design based on any ratio of tension and shear forces.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sandwich composite exterior wall panel connector pull-shear combined strength test device, comprising an outer leaf panel (2) and an inner leaf panel (3) connected by a connector (1); characterized in that: the bottom end of the inner leaf panel (3) has an inner leaf panel horizontal support (3-2), and the inner leaf panel horizontal support (3-2) has a gap with the bottom end of the outer leaf panel (2); a loading mechanism is connected between the inner leaf panel horizontal support (3-2) and the outer leaf panel (2), or between the inner leaf panel horizontal support (3-2) and a loading beam (7) fixed at the top end of the outer leaf panel (2), and a counterweight (8-1) is arranged on the loading beam (7); the loading mechanism comprises a loading steel rod (9-1) which passes through the inner leaf panel horizontal support (3-2), and the bottom end of the loading steel rod (9-1) is locked by a loading steel rod fixing anchor (9-3) which abuts against the bottom surface of the inner leaf panel horizontal support (3-2); the loading steel rod (9-1) passes upward through the outer leaf panel (2) or the loading beam (7) and is locked by a loading steel rod loading anchor (9-2) which abuts against the top surface of the outer leaf panel (2) or the loading beam (7); a force sensor (10) is arranged on the loading mechanism, the force sensor (10) is sleeved on the loading steel rod (9-1) and clamped between the loading steel rod loading anchor (9-2) and the top surface of the outer leaf panel (2) or the loading beam (7); and a displacement meter (11) for detecting vertical displacement is arranged between the outer leaf panel (2) and the inner leaf panel (3). A roller L-shaped support (4-1) is fixed on the outer leaf panel (2), a roller flat support (4-3) corresponding to the roller L-shaped support (4-1) is fixed on the inner leaf panel (3), and a roller (4-2) is clamped between the roller L-shaped support (4-1) and the roller flat support (4-3). The inner leaf panel horizontal support (3-2) is provided with a loading groove (3-3) for the loading steel rod (9-1) to pass through. A loading steel rod fixing anchor pressure plate (3-4) corresponding to the loading groove (3-3) is fixed on the bottom surface of the inner leaf panel horizontal support (3-2). The top surface of the outer leaf panel (2) is higher than the top surface of the inner leaf panel (3), a displacement measuring plate (12) is fixed on the top surface of the outer leaf panel (2), and the displacement meter (11) is installed between the position above the inner leaf panel (3) and the inner leaf panel (3).

2. A device for testing the combined tensile-shear strength of a connection between a sandwich composite exterior wall panel according to claim 1, wherein The counterweight (8-1) is connected to the loading beam (7) by a counterweight suspender (8-2) and a counterweight suspender fixing bolt (8-3).

3. A device for testing the combined tensile-shear strength of a connection between a sandwich composite exterior wall panel according to claim 1, wherein ​ 4. A device for testing the combined tensile-shear strength of a connection between a sandwich composite exterior wall panel according to claim 3, wherein ​ 5. A device for testing the combined tensile-shear strength of a connector for a sandwich composite exterior wall panel according to claim 1, wherein ​ 6. A device for testing the combined tensile-shear strength of a connector for a sandwich composite exterior wall panel according to claim 1, wherein ​ 7. A device for testing the combined tensile-shear strength of a connector for a sandwich composite exterior wall panel according to claim 1, wherein The outer leaf plate (2) is fixed with a wallboard reinforcing steel plate (5), the wallboard reinforcing steel plate (5) is provided with a wallboard vertical hole (5-1) corresponding to the vertical through hole of the outer leaf plate (2), and the wallboard reinforcing steel plate (5) is provided with a wallboard reinforcing steel plate connecting hole (5-2); one end of the loading beam (7) is fixed with a loading beam and wallboard connecting plate (7-2), the loading beam and wallboard connecting plate (7-2) is provided with a loading beam and wallboard connecting hole (7-3), the loading beam connecting bolt (6) passes through the loading beam and wallboard connecting hole (7-3) and the wallboard reinforcing steel plate connecting hole (5-2), the loading beam and wallboard connecting plate (7-2) and the wallboard reinforcing steel plate (5) are tightly connected, and the loading beam (7) is provided with a loading beam loading hole (7-1).

8. A method of testing the combined tensile-shear strength of a sandwich composite exterior wall panel connector, the method comprising: The sandwich composite external wall board connecting piece tension-shear combined strength test device adopts any one of claims 1-7, and specifically comprises the following steps: S1, according to the thickness of the inner leaf plate and the outer leaf plate of the sandwich composite wall plate for engineering and the length of the connecting piece, a test piece is prepared; S2, connecting the loading beam (7) and the outer leaf plate (2); S3, according to the tension / shear ratio, the size and position of the counterweight (8-1) are determined, and the counterweight (8-1) is installed on the loading beam (7); S4, according to the tension / shear ratio, the position of the loading mechanism is determined, and the loading mechanism is installed, the force sensor (10) and the displacement meter (11) are installed; S5, a tension is applied to the loading mechanism, a required tension / shear ratio is obtained in the connecting piece, a shear force V-displacement d curve is obtained by continuing to load, and a failure strength is obtained; different tension / shear ratios are selected to obtain different failure strengths, and a connecting piece tension-shear failure curve is formed.

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