A wallboard shear test apparatus and method with flexible face mask displacement device

Abstract

The application provides a wallboard shearing test device with a flexible face-out displacement prevention device, which comprises four pairs of clamping arms, a fixed end fixed support, a loading end fixed support, a shearing loading structure and the face-out displacement prevention device. The clamping arms are clamped and fixed to four edges of a test wallboard. One end of the test wallboard is fixed to the fixed end fixed support, and the other end is installed with upper and lower sliding plates which are respectively arranged in upper and lower guide rail seats installed on the loading end fixed support. The face-out displacement prevention device comprises supporting channel steels arranged in pairs at two ends of the test wallboard, a long connecting rod installed between the two supporting channel steels, a plurality of flexible supporting blocks sleeved on the long connecting rod and rib protection frames installed on the outer sides of the ribs of the test wallboard. The flexible supporting blocks constrain the face-out displacement of the test wallboard. The device and method are suitable for shearing tests of large wallboard components under the condition of preventing face-out displacement, have the advantages of being capable of simulating real test boundary conditions, being highly universal, having reliable results and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of static test of large wallboard structure, and particularly relates to a wallboard shear test device and method with a flexible anti-face displacement device. BACKGROUND

[0002] In the statics of wallboard components, when a large wallboard with a length exceeding 1 meter is subjected to a shear stability or strength test, the load cannot be uniformly loaded on the loading edge of the test piece after loading, and the edge stability cannot be guaranteed after the test piece is stressed, resulting in that the test cannot be carried out according to the established loading idea.

[0003] At the same time, the test piece needs to limit the face displacement at the specified position in the actual working condition, and the stiffness required to be limited is different for different test pieces. In order to ensure that the test results are consistent with the actual working condition and to ensure that the instability load, the failure load and the strength limit obtained by the test are closer to the actual working condition, it is necessary to design a shear test device for large wallboards, which can realize uniform loading of the load and includes a universal flexible anti-face displacement device with adjustable constraint stiffness to meet the needs of different test pieces. SUMMARY

[0004] The purpose of the present application is to solve the problems of poor edge stability of large wallboard test pieces, uneven load loading and limitation of face displacement at specified positions, and to provide a wallboard shear test device and method with a flexible anti-face displacement device to solve the above-mentioned problems. The length of the wallboard test piece in a single direction exceeds 1 meter.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] A wallboard shear test device with a flexible anti-face displacement device, the wallboard shear test device comprising four pairs of clamping arms, a fixed end fixed support, a loading end fixed support, a shear loading structure and an anti-face displacement device, wherein:

[0007] The four pairs of clamping arms are respectively clamped to the four edges of the test wallboard, one end of the test wallboard is a fixed end, and the opposite end is a loading end; the clamping arms of the fixed end of the test wallboard are fixed to the fixed end fixed support through a fixed plate, so as to ensure that the side edge of the fixed end of the test wallboard is completely fixed and cannot move or rotate;

[0008] The shearing loading structure comprises an upper loading end slide plate and a lower loading end slide plate respectively installed on the clamping arms at the loading end of the test wallboard, the upper loading end slide plate is connected with an upper actuating cylinder, and the loading end is used for applying a load to the test wallboard through the actuating cylinder and the upper loading end slide plate; an upper guide rail seat and a lower guide rail seat are respectively installed on the loading end fixed seat, and the upper loading end slide plate and the lower loading end slide plate are respectively arranged in the upper guide rail seat and the lower guide rail seat, so that the side edges of the loading end of the test wallboard can only move along the force loading direction;

[0009] The anti-face-out displacement device comprises two pairs of supporting channel steels, long connecting rods, a plurality of flexible supporting blocks and rib protection frames, the rib protection frames are fixedly installed on the outer sides of the rib strips on the test wallboard, the supporting channel steels are arranged in pairs on the front and back sides of the two ends of the test wallboard, at least two long connecting rods are installed between the supporting channel steels on the side of the test wallboard with rib strips, the flexible supporting blocks are vertical square tubes and are fixedly sleeved on the long connecting rods, a plurality of spring supporting pieces perpendicular to the square tubes are arranged in the square tubes, one end of the spring supporting piece penetrates through the square tube and is in contact with the rib protection frame in the direction of the test wallboard, and the spring supporting piece plays a restraining role on the face-out displacement of the test wallboard.

[0010] The present application further provides that the material rigidity and strength of the clamping arms should be higher than the rigidity and strength of the test wallboard material; specifically, the material can be selected as a 45# steel plate after quenching and tempering treatment.

[0011] The present application further provides that every two clamping arms in the four pairs of clamping arms are respectively installed on the front and back sides of the non-strength evaluation area around the test wallboard, a plurality of mounting holes are arranged on the clamping arms, after the clamping arms are installed at the corresponding positions of the test wallboard, the mounting holes on the front and back clamping arms are used to drill mounting holes in the non-strength evaluation area of the test wallboard, and then the clamping arms are fixed through bolts and nuts.

[0012] The present application further provides that every two adjacent clamping arms in the four pairs of clamping arms are connected together through a cylindrical pin at the corner part of the test wallboard, and the non-strength evaluation area of the test wallboard does not pass through or contact the cylindrical pin, so that the relative fixed position between the connected clamping arms is unchanged and can rotate around the cylindrical pin. After deformation under stress in the test, the clamping arms rotate in the deformation direction of the test wallboard, so that the stress direction always meets the requirements.

[0013] The present application further provides that the fixed end fixed support and the loading end fixed seat are fixed on the ground through a pressing plate or a foundation bolt.

[0014] The application is further provided with vertical grooves on the upper and lower guide rail seats, and two pairs of sliding roller strips are symmetrically arranged in the vertical grooves, the sliding roller strips are fixed on the wall surface of the vertical grooves through bolts, a plurality of horizontal rollers are arranged on one side of the sliding roller strips in the vertical direction, and the rollers in the symmetric sliding roller strips are face-to-face mounted, the upper and lower sliding plates on the loading end are respectively arranged between the rollers of the face-to-face mounted sliding roller strips in the upper and lower guide rail seats, so that the side edge of the loading end of the test wall plate can only move freely along the loading direction of the force, and the movement and rotation in other directions are completely constrained, and the force of the actuator is transmitted along the parallel direction of the side edge of the loading end of the test wall plate during the test.

[0015] The application is further provided with one rib protection frame arranged on each rib on the test wall plate, the rib protection frame is a frame-shaped strip structure, the length of the rib protection frame is consistent with that of the rib, a plurality of thread holes corresponding to the rib protection frame are arranged on the left and right sides of the rib protection frame, and the bolts are screwed into the thread holes on the two sides and are in abutment with the rib on the test wall plate, so that the rib protection frame and the rib on the test wall plate are fixed together.

[0016] The application is further provided with that the upper ends of each pair of support channel steels are fixed and connected together through a screw rod and a nut, and the bottom ends are fixed on the ground through a pressing plate or a foundation bolt, so that the test wall plate does not tilt during the test.

[0017] The application is further provided with that the spring support in the flexible support block can be matched with springs with different rigidities according to the need of fixed rigidity, or a cylindrical pin can be used as a pure rigid constraint.

[0018] The application is further provided with that the number of the flexible support blocks is consistent with and corresponds to the number of the ribs. The square tube of the flexible support block is provided with mounting through holes consistent with the number of the long connecting rods, the long connecting rods pass through the mounting through holes to string together a plurality of flexible support blocks, and each flexible support block on each long connecting rod is respectively inserted into a fixed flange on the two sides of the flexible support block, so as to position and fix the flexible support block.

[0019] The application is further provided with that the support channel steel is provided with a waist round hole matched with the long connecting rod and arranged in the front-rear direction, and the waist round hole is used for mounting the long connecting rod; the two ends of the long connecting rod are provided with external thread structures, the long connecting rod passes through the waist round holes in the two ends of the support channel steel, and a nut is arranged on each side of the waist round hole, and the long connecting rod is fixed through the clamping of the two nuts.

[0020] The application is further provided that the position of the flexible support block can be adjusted along the long connecting rod according to the position of the rib, so that one side of the fixed surface on the square tube is aligned with one side of the outer wall surface on the corresponding rib protection frame, and the flexible support block is clamped through the fixed flanges on both sides. Specifically, the fixed flanges are provided with threaded holes, and the fixed flanges are fixed on the long connecting rod by screwing screws into the threaded holes.

[0021] The application is further provided that the upper slide plate on the loading end and the upper guide rail seat, the lower slide plate on the loading end and the lower guide rail seat, and the clamping arm and the support channel steel can move relative to each other, and the contact surfaces are provided with pads to reduce friction. The pads are respectively installed on the upper guide rail seat, the lower guide rail seat and the clamping arm through bolts, and the material of the pads can be nylon, so that the movement of the corresponding parts is not affected by friction.

[0022] The application also provides a wallboard shear test method using the wallboard shear test device, which specifically includes the following steps:

[0023] (1) Four pairs of clamping arms are installed around the test wallboard, and adjacent clamping arms are connected to each other;

[0024] (2) One end of the test wallboard is fixed on the fixed end fixed support through a fixed plate; the clamping arms at the other end are provided with an upper loading end slide plate and a lower loading end slide plate, and are respectively arranged in an upper guide rail seat and a lower guide rail seat installed on a loading end fixed seat;

[0025] (3) A rib protection frame is installed on the outer side of the rib on the test wallboard;

[0026] (4) A plurality of flexible support blocks are sleeved and fixed on a long connecting rod, and the long connecting rod is fixed on the support channel steels at both ends, so that the spring support of the flexible support block is in contact with the rib protection frame, and the out-of-plane displacement of the test wallboard is constrained;

[0027] (5) The wallboard shear test device is placed on a test equipment, the test equipment applies a load to one end of the test wallboard through an actuator cylinder, and a wallboard shear test is performed.

[0028] The application is further provided that the selection of the spring support should be determined according to the actual situation of the out-of-plane displacement of the test wallboard. First, the test working condition is calculated and simulated in a finite element analysis software, a support constraint is added to the part with the out-of-plane displacement constraint, then the support reaction force F of each constraint part is calculated; after the force of the model without constraint is calculated, the directional deformation displacement X of the corresponding constraint area is calculated as the basis for selecting the spring.

[0029] According to Hooke's theorem, when the spring is selected, it is known that

[0030] F = -KX

[0031] In the formula, K is the stiffness of the spring, X is the deformation of the spring, and F is the counterforce generated by the spring, the direction of F is opposite to that of X.

[0032] Thus, the stiffness K of the spring is,

[0033] K = F / X,

[0034] The calculated K is the stiffness of the selected spring.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] The wallboard shear test device and test method with a flexible face-outer displacement prevention device disclosed by the present application have the advantages of being able to simulate real test boundary conditions, being highly universal, obtaining reliable test results, being low in cost, and being high in efficiency, and the like. The present application is suitable for static test of shear stress of large wallboard components under the condition of preventing face-outer displacement, thereby obtaining mechanical performance parameters of the components, such as post-loading instability load, failure load, instability form, failure form, and failure position.

[0037] After the test wallboard is loaded by the actuating cylinder, the test wallboard can be deformed in the shear direction and instability and failure can occur, thereby avoiding other forms of failure and obtaining the instability form and failure strength of the test wallboard under shear stress. Meanwhile, according to the actual specific situation and requirements of the test wallboard for preventing face-outer displacement, the spring stiffness and length of the spring support of the flexible support block are determined through calculation, and then the installation position and constraint stiffness of the flexible support block are adjusted, so as to ensure that the test boundary conditions are flexibly met. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 Fig. 1 is a structural schematic view of the wallboard shear test device with a flexible face-outer displacement prevention device of the present application;

[0039] Figure 2 Fig. 2 is a front view of the test wallboard and the clamping arm of the present application;

[0040] Figure 3 Fig. 3 is a structural schematic view of the shear loading structure of the upper part of the present application;

[0041] Figure 4 Fig. 4 is a structural schematic view of the shear loading structure of the lower part of the present application;

[0042] Figure 5 Fig. 5 is a bottom view of the inner structure of the upper guide rail seat of the present application;

[0043] Figure 6 Fig. 6 is a structural schematic view of the sliding roller row strip of the present application;

[0044] Figure 7 Fig. 1 is a structural schematic diagram of the test wallboard and the anti-face-out displacement device of the present application;

[0045] Figure 8 Fig. 2 is a top view of the test wallboard and the anti-face-out displacement device of the present application; Figure 7

[0046] Figure 9 Fig. 4 is a partial enlarged view of region A in Fig. 3; Figure 8

[0047] Figure 10 Fig. 5 is a partial enlarged view of region B in Fig. 3; Figure 8

[0048] Fig. 1 is a structural schematic diagram of the test wallboard and the anti-face-out displacement device of the present application;

[0049] DETAILED DESCRIPTION

[0050] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0051] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings shown, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. Figure 1

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] ​​​​​According to Figure 1 As shown in a wallboard shear test device provided with a flexible face outward displacement prevention device, the wallboard shear test device comprises four pairs of clamping arms 2, a fixed end fixed support 3, a loading end fixed support 4, a shear loading structure 5 and a face outward displacement prevention device 6, wherein:

[0054] The four pairs of clamping arms 2 are used for clamping and fixing four edges of a test wallboard 1, as Figure 2 As shown in the figure, the clamping arms 2 comprise a first clamping arm 2-1, a second clamping arm 2-2, a third clamping arm 2-3 and a fourth clamping arm 2-4 which are respectively installed on the upper, lower, left and right four edges of the test wallboard 1, it is to be noted that the four edges of the test wallboard 1 except the upper strength test area need to contain a non-strength test area for clamping and installing the front and back of the clamping arms 2, and one end of the test wallboard 1 is a fixed end and the opposite end is a loading end; in this embodiment, one end of the third clamping arm 2-3 is a fixed end and one end of the fourth clamping arm 2-4 is a loading end;

[0055] The fixed end fixed support 3 is fixed on the ground by a pressing plate or a foundation bolt, the third clamping arm 2-3 is connected with a fixed plate 8 through a bolt, the other end of the fixed plate 8 is fixed on the fixed end fixed support 3 through a bolt, so as to ensure that the side edge of the fixed end of the test wallboard 1 is completely fixed and cannot move or rotate;

[0056] As Figures 3-5 As shown in the figure, the shear loading structure 5 comprises a loading end upper sliding plate 9-1 and a loading end lower sliding plate 9-2 which are respectively installed on the upper and lower two places of the fourth clamping arm 2-4, the loading end upper sliding plate 9-1 is connected with an actuator 11 above, for applying a load to the test wallboard 1 through the actuator 11 and the loading end upper sliding plate 9-1; the loading end fixed support 4 is fixed on the ground by a pressing plate or a foundation bolt, and an upper guide rail seat 10-1 and a lower guide rail seat 10-2 are respectively fixed and installed in the vertical direction through bolts, vertical grooves are formed in the upper guide rail seat 10-1 and the lower guide rail seat 10-2, and the loading end upper sliding plate 9-1 and the loading end lower sliding plate 9-2 are respectively placed in the upper guide rail seat 10-1 and the lower guide rail seat 10-2, so that the side edge of the loading end of the test wallboard 1 can only move along the force loading direction, i.e. the vertical direction, and the force of the actuator 11 is transmitted in the parallel direction of the side edge of the loading end of the test wallboard 1 during the test;

[0057] As Figure 7As shown, the anti-face displacement device 6 includes two pairs of support channel steel 14, long connecting rod 17, several flexible support blocks 15 and rib protection frame 16, which is fixedly installed on the outer side of the vertical rib 1-1 of the test wallboard 1; the support channel steel 14 is arranged in pairs in front and back of the test wallboard 1 on the left and right sides of the test wallboard 1, and at least two horizontally arranged long connecting rods 17 are fixedly installed between the support channel steel 14 on the ribbed side of the test wallboard 1, and the flexible support block 15 is fixedly sleeved on the long connecting rod 17, combined Figures 8-9 As shown, the flexible support block 15 is a vertically arranged square tube 15-1, and a plurality of spring supports 15-2 perpendicular to the square tube are arranged in the square tube 15-1 in the vertical direction, and one end of the spring support 15-2 penetrates the square tube 15-1 and contacts the rib protection frame 16 in the direction of the test wallboard 1, thereby restraining the out-of-plane displacement of the test wallboard 1.

[0058] Further, the material rigidity and strength of the clamping arm 2 should be higher, which needs to be higher than the rigidity and strength of the material of the test wallboard 1, for example, the material is selected as a 45# steel plate after quenching and tempering treatment.

[0059] Further, each pair of clamping arms in the four pairs of clamping arms 2 is respectively installed on the front and back sides of the non-strength evaluation area around the test wallboard 1, and the installation area of the clamping arm 2 cannot cover the strength evaluation area of the test wallboard 1; the clamping arm 2 should avoid various protruding parts on the test wallboard 1, such as the reinforcing ribs on the test wallboard 1 and the rib 1-1.

[0060] Further, a plurality of mounting holes are arranged on the clamping arm 2, and after the clamping arm 2 is installed at the corresponding position of the test wallboard 1, the mounting holes on the front and back clamping arms 2 are matched with the drilling mounting holes on the non-strength evaluation area of the test wallboard 1, and then the clamping arm 2 is fixed around the test wallboard 1 through bolts and nuts.

[0061] Further, each two adjacent clamping arms in the four pairs of clamping arms 2 are connected together through a cylindrical pin 7 at the corner part of the test wallboard 1, and the non-strength evaluation area of the test wallboard 1 does not pass through or contact the cylindrical pin 7, so that the relative fixed position between the connected clamping arms 2 is unchanged, and the clamping arms 2 can rotate around the cylindrical pin 7, and the corner part of the test wallboard 1 is not affected by the clamping arm 2, and after the deformation under stress in the test, the clamping arm 2 rotates in the deformation direction of the test wallboard 1, so that the stress direction always meets the requirements.

[0062] Further, combined Figure 6As shown, two pairs of sliding roller strips 12 are symmetrically arranged in the vertical slots of the upper and lower rail seats 10-1 and 10-2, and the sliding roller strips 12 are fixed on the wall surface of the vertical slots by bolts. One side of the sliding roller strip 12 is provided with a plurality of horizontal rollers 12-1 in the vertical direction, and the rollers 12-1 in the symmetric sliding roller strips 12 are installed face to face. The upper and lower sliding plates 9-1 and 9-2 are respectively arranged between the rollers of the face-to-face sliding roller strips 12 in the upper and lower rail seats 10-1 and 10-2, so as to ensure that the side edges of the loading end of the test wallboard 1 can only move freely in the vertical direction, and the movement and rotation in other directions are completely constrained.

[0063] Further, one rib protection frame 16 is arranged on each rib 1-1 on the test wallboard 1. The rib protection frame 16 is a frame-shaped strip structure, and the length of the rib protection frame 16 is consistent with that of the rib 1-1. A plurality of thread holes are arranged on the left and right sides of the rib protection frame 16, and the bolts are screwed into the thread holes on the left and right sides and are in contact with the rib 1-1, so as to fix the rib protection frame 16 and the rib 1-1 on the test wallboard 1 together.

[0064] Further, the upper ends of each pair of support channel steels 14 are fixed and connected together by a screw rod and a nut, and the bottom ends are fixed to the ground by a pressing plate or a foundation bolt, so as to ensure that the test wallboard 1 does not tilt during the test.

[0065] Further, the spring support 15-2 in the flexible support block 15 can be replaced by springs with different stiffnesses according to the need for fixed stiffness, or a cylindrical pin can be used as a pure rigid constraint.

[0066] Further, the selection of the spring support 15-2 in the flexible support block 15, specifically the selection of the spring stiffness and length, should be determined according to the actual situation of the out-of-plane displacement of the test wallboard 1. First, the test working condition is calculated and simulated in the finite element analysis software, and a support constraint is added to the position where the out-of-plane displacement constraint is added. Then, the support reaction force F of each constraint position is calculated. At the same time, the directional deformation displacement X of the corresponding constraint area is calculated after the force of the unconstrained model is calculated, which is used as the basis for selecting the spring.

[0067] When the spring is selected, according to the Hook's law, it can be known that

[0068] F = -KX

[0069] In the formula, K is the stiffness of the spring, X is the deformation of the spring, and F is the reaction force generated by the spring. The direction of F is opposite to that of X.

[0070] Therefore, the stiffness K of the spring is

[0071] K = F / X,

[0072] The calculated K is the stiffness of the selected spring.

[0073] Further, the number of flexible support blocks 15 is consistent with the ribs 1-1 and one-to-one correspondence. The square tube 15-1 of the flexible support block 15 is provided with a mounting through hole consistent with the number of long connecting rods 17, the long connecting rod 17 passes through the mounting through hole to string together several flexible support blocks 15, and each long connecting rod 17 on each side of the flexible support block 15 is respectively inserted into a fixed flange 18 for positioning and fixing of the flexible support block 15.

[0074] Further, the support channel steel 14 is provided with a waist round hole matched with the long connecting rod 17 and arranged in the front and rear directions for mounting of the long connecting rod 17; in combination with Figure 10 As shown, the two ends of the long connecting rod 17 are externally threaded structures, pass through the waist round holes on the two side support channel steels 14, and each side of the waist round hole is provided with a nut, and the long connecting rod 17 is fixed by clamping of the two nuts. Further, according to the fixed position of the rib 1-1 and the rib protection frame 16, the mounting position of the long connecting rod 17 in the front and rear directions can be adjusted in the waist round hole, so that the spring support 15-2 of the flexible support block 15 lightly abuts against the surface of the rib protection frame 16.

[0075] Further, according to the position of the rib 1-1, the position of the flexible support block 15 can be adjusted along the long connecting rod 17, so that one side of the fixed surface on the square tube 15-1 of the flexible support block 15 is aligned with one side of the outer wall surface of the corresponding rib protection frame 16, and the flexible support block 15 is clamped by the fixed flanges 18 on both sides. Further, the fixed flange 18 is provided with a threaded hole, and the fixed flange 18 is fixed on the long connecting rod 17 by screwing a screw into the threaded hole.

[0076] Further, in the wallboard shear test device, the upper slide 9-1 of the loading end and the upper guide rail seat 10-1, the lower slide 9-2 of the loading end and the lower guide rail seat 10-2, and the first clamping arm 2-1 and the support channel steel 14, the second clamping arm 2-2 and the support channel steel 14 can move relative to each other, and the contact surfaces are provided with a pad 13, the pad 13 is installed on the upper guide rail seat 10-1, the lower guide rail seat 10-2, the first clamping arm 2-1 and the second clamping arm 2-2 by bolts, and the first clamping arm 2-1 and the second clamping arm 2-2 are provided with a guide rail 11, and the guide rail 11 is provided with a guide rail seat 10-1 and a guide rail seat 10-2. Figure 5 and Figure 10 As shown, the material of the pad 13 can be nylon, so as to ensure that the movement of the corresponding parts will not be affected by friction.

[0077] The test method of the wallboard shear test using the wallboard shear test device includes the test wallboard 1, the wallboard shear test device, and a test device, and specifically includes the following steps:

[0078] (1) The four pairs of clamping arms 2 are installed on both sides of the non-strength evaluation area around the test wallboard 1, and the adjacent clamping arms are connected together through the cylindrical pin 7;

[0079] (2) One end of the test wallboard 1 is fixed to the fixed-end fixed support 3 through the fixed plate 8, and the clamping arm 2 at the other end is installed with the loading-end upper slide plate 9-1 and the loading-end lower slide plate 9-2, and is respectively placed in the upper guide rail seat 10-1 and the lower guide rail seat 10-2 installed on the loading-end fixed seat 4;

[0080] (3) The rib protection frame 16 is installed on the outer side of the rib 1-1 of the test wallboard 1;

[0081] (4) According to the actual working condition of the out-of-plane displacement of the test wallboard 1, the spring support 15-2 is selected, the flexible support block 15 is sleeved and fixed on the long connecting rod 17, and the long connecting rod 17 is fixed on the support channel steel 14 on both sides, so that the spring support 15-2 is in contact with the rib protection frame 16, and the out-of-plane displacement of the test wallboard 1 is constrained;

[0082] (5) The wallboard shear test device is placed on the test device, the test device applies pressure to the actuator cylinder 11, and then applies load to one end of the test wallboard 1, and the wallboard shear test is performed.

[0083] Based on the above test device and test method, after the actuator cylinder 11 loads the test wallboard 1, the test wallboard 1 can deform and lose stability and damage according to the shear direction, avoiding the occurrence of other forms of damage and thus obtaining the instability form and damage strength of the test wallboard 1 under shear stress.

[0084] Meanwhile, according to the actual specific situation and requirements of the out-of-plane displacement of the test wallboard 1, the spring stiffness and length of the spring support 15-2 are determined by calculation, and then the installation position of the flexible support block 15 and the fixed stiffness of the spring are adjusted to ensure that the test boundary conditions meet the requirements.

[0085] The specific embodiments of the present application are described in detail above, but they are only examples, and the present application is not limited to the specific embodiments described above. Therefore, equivalent transformations and modifications made without departing from the spirit and scope of the present application should be covered within the scope of the present application.

Claims

1. A wallboard shear test apparatus with a flexible face mask displacement device, comprising: a base; a wallboard support; a shear test apparatus; a face mask; a flexible displacement device; and a displacement device support. The wallboard shearing test device comprises four pairs of clamping arms, a fixed end fixed support, a loading end fixed support, a shearing loading structure and a face-out displacement prevention device. The four pairs of clamping arms are respectively clamped to the four edges of the test wallboard, and the clamping arms of the fixed end of the test wallboard are fixed on the fixed end fixed support; the shearing loading structure comprises loading end upper and lower sliding plates respectively installed on the clamping arms of the loading end of the test wallboard, and is respectively arranged in the upper and lower guide rail seats installed on the loading end fixed support. The face-out displacement prevention device comprises two pairs of support channel steels, long connecting rods, a plurality of flexible support blocks and rib protection frames, the rib protection frames are fixedly installed on the outer sides of the ribs on the test wallboard; the support channel steels are arranged in pairs on the front and back sides of the two ends of the test wallboard, and at least two long connecting rods are installed between the support channel steels on the side of the test wallboard with ribs; the flexible support blocks are square tubes and are fixedly sleeved on the long connecting rods, a plurality of spring support members perpendicular to the square tubes are arranged in the square tubes, and one end of the spring support members is in contact with the rib protection frame through the square tube, thereby restraining the face-out displacement of the test wallboard. The upper and lower guide rail seats are both provided with vertical grooves, and two pairs of sliding roller strip rows are symmetrically arranged in the vertical grooves; a plurality of horizontal rollers are arranged on one side of the sliding roller strip rows in the vertical direction, and the rollers in the symmetric sliding roller strip rows are face-to-face installed; the loading end upper and lower sliding plates are respectively arranged between the rollers of the face-to-face installed sliding roller strip rows in the upper and lower guide rail seats.

2. The wallboard shear test apparatus of claim 1, wherein, Each of the two clamping arms in each pair of the four pairs of clamping arms is installed on the front and back sides of the non-strength evaluation area around the test wallboard; a plurality of mounting holes are arranged on the clamping arms, the mounting holes on the front and back clamping arms are matched with the mounting holes in the non-strength evaluation area of the test wallboard, and the clamping arms are fixed through bolts and nuts; the material rigidity and strength of the clamping arms should be higher than the rigidity and strength of the material of the test wallboard.

3. The wallboard shear test apparatus of claim 1, wherein, The two adjacent clamping arms in each pair of the four pairs of clamping arms are connected together through a cylindrical pin at the corner part of the test wallboard, and the non-strength evaluation area of the test wallboard does not pass through or contact the cylindrical pin.

4. The wallboard shear test apparatus of claim 1, wherein, One rib protection frame is installed on each rib on the test wallboard, the rib protection frame is a frame-shaped strip structure with the same length as the rib, a plurality of thread holes corresponding to the left and right sides of the rib protection frame are arranged, and the rib protection frame is fixed on the rib on the test wallboard by screwing bolts into the thread holes on the left and right sides of the rib protection frame.

5. The wallboard shear test apparatus of claim 1, wherein, The number of the flexible support blocks is the same as that of the ribs, and the square tube of the flexible support block is provided with mounting through holes consistent with the number of the long connecting rods, the long connecting rods pass through the mounting through holes to string together the flexible support blocks, and each of the flexible support blocks on each long connecting rod is respectively inserted into a fixed flange on both sides for positioning and fixing of the flexible support blocks; and according to the position of the rib, the position of the flexible support block is adjusted along the long connecting rod, so that one side of the fixed surface on the square tube is aligned with one side of the outer wall surface on the corresponding rib protection frame.

6. The wallboard shear test apparatus of claim 1, wherein, The upper end of each pair of the support channel steels is fixedly connected together by a screw rod and a nut, and the bottom end is fixed to the ground; the support channel steel is provided with a waist round hole matched with the long connecting rod and arranged in the front-rear direction; the two ends of the long connecting rod are externally threaded structures, pass through the waist round holes on the two end support channel steels, and each is provided with a nut on the two sides of the waist round hole, and the long connecting rod is fixed by clamping of the two nuts.

7. The wallboard shear test apparatus of claim 1, wherein, A pad plate is arranged between the upper slide plate of the loading end and the upper guide rail seat, between the lower slide plate of the loading end and the lower guide rail seat, and between the clamping arm and the support channel steel to reduce friction, the pad plate is respectively arranged on the upper guide rail seat, the lower guide rail seat and the clamping arm, and the material is selected as nylon.

8. A wallboard shear test method using the wallboard shear test apparatus according to any one of claims 1 to 7, characterized by, The method comprises the following steps: (1) four pairs of clamping arms are installed around the test wall plate, and adjacent clamping arms are connected to each other; (2) the clamping arm at one end of the test wall plate is fixed to the fixed end fixed support through a fixed plate; the clamping arm at the other end is provided with an upper loading slide plate and a lower loading slide plate, and is arranged in an upper guide rail seat and a lower guide rail seat arranged on a loading end fixed support; (3) a rib protection frame is installed on the outer side of the rib on the test wall plate; (4) a plurality of flexible support blocks are sleeved and fixed on the long connecting rod, and the long connecting rod is fixed on the two end support channel steels, so that the spring support of the flexible support block is in contact with the rib protection frame, and the out-of-plane displacement of the test wall plate is constrained; (5) the wall plate shear test device is placed on a test equipment, the test equipment applies a load to one end of the test wall plate through an actuator connected with the upper loading slide plate, and a wall plate shear test is performed.

9. The wallboard shear test method of claim 8, wherein, The selection of the spring support in the flexible support block is determined according to the actual situation of the out-of-plane displacement of the test wall plate: The support constraint is added to the part where the out-of-plane displacement constraint is added, the support reaction force F of each constraint part is calculated; after the force of the model without constraint is calculated, the directional deformation displacement X of the corresponding constraint area is calculated as the basis for selecting the spring; and according to the Hook's law K=F / X, the stiffness of the selected spring is obtained.

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