Multi-directional anti-seismic test platform for civil engineering structure

Abstract

The invention discloses a multidirectional anti-seismic test platform for a civil engineering structure, and belongs to the technical field of anti-seismic test platforms, the multidirectional anti-seismic test platform comprises a lower support plate, an upper support plate, a vertical vibration mechanism and a horizontal vibration mechanism, and four corners of the upper surface of the lower support plate are provided with support pipes; the lower ends of corresponding supporting rods extend into the inner sides of the upper ends of the supporting pipes, the upper ends of the four supporting rods are fixedly connected to the four corners of the lower surface of an upper supporting plate, and first springs embedded in the outer sides of the supporting rods are arranged between the upper ends of the supporting pipes and the lower surface of the upper supporting plate. A vertical vibration mechanism with the adjustable vibration position is arranged between the upper surface of the lower supporting plate and the lower surface of the upper supporting plate. According to the device, the vibration position can be adjusted, so that the influence of a vibration source on the civil engineering structure in different directions and distances from the civil engineering structure can be detected, the civil engineering structure can be horizontally vibrated, and the anti-seismic property of the civil engineering structure can be comprehensively detected.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake-resistant test platforms, in particular to earthquake-resistant test experimental equipment based on sensor detection technology, specifically to a multi-directional earthquake-resistant test platform for civil engineering structures. Background Art

[0002] Earthquakes are extremely destructive natural disasters that occur frequently in many countries and regions. The performance of civil engineering structures under earthquakes is directly related to the safety of people's lives and property, which has prompted the development of seismic testing technology. In recent years, new building materials and innovative structural systems have emerged in the field of civil engineering. These new materials and structures have potential advantages in seismic performance, but their seismic performance needs to be verified through experiments. The seismic test platform can provide an effective test environment for the seismic performance research of new building materials and structural systems, and promote their application in practical engineering. During the use of the civil engineering structure seismic test platform, in addition to the vibration it can generate, it is also connected to a variety of sensors to monitor the vibration of the platform. For example, vibrating string sensors, strain vibration sensors and velocity sensors are needed to monitor the vibration of the test platform to ensure that the test platform can vibrate stably and avoid excessive vibration, which will cause the test platform itself to be unstable and affect the test results of the civil engineering structure. The existing seismic test platform still has the following technical problems when in use, such as: 1. The existing seismic test platform is not convenient for adjusting the vibration position when in use, and thus is not convenient for testing the impact of the vibration source on the civil engineering structure when it is in different positions of the civil engineering structure; 2. When in use, the existing seismic test platform can generally only simulate vertical vibration. However, during an earthquake, there are not only vertical vibrations, but also horizontal vibrations. Therefore, the existing seismic test platform is not comprehensive enough when testing the seismic performance of civil engineering structures; Therefore, a multi-directional seismic test platform for civil engineering structures is needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-directional seismic test platform for civil engineering structures to solve the problem mentioned in the above background technology that the existing seismic test platform cannot simulate the influence of different azimuth and horizontal vibrations on civil engineering structures.

[0004] To achieve the above object, the present invention provides the following technical solutions: The cam is secured to the upper and lower surfaces of the frame, and the cam is secured to the upper and lower surfaces of the frame by means of a spring which is adapted to move the cams upwardly and downwardly.

[0005] Preferably, the vertical vibration mechanism includes a spiral track, a positioning hole, a positioning rod, an inclined groove and a vibration shaft, the spiral track is arranged on the upper surface of the lower support plate, and a sliding plate is slidably connected to the spiral track, the upper end of the sliding plate is connected to the lower end protrusion of the mounting frame, and the upper surface of the sliding plate is provided with two inverted T-slots, and the two lower ends of the inverted T-slots are slidably connected with positioning blocks, and the positioning blocks are extruded and contacted with the spiral track, and the two inverted T-slots are extruded and connected by an n-shaped extrusion block, and the upper end of the n-shaped extrusion block A follower block is fixedly connected, the upper end of the follower block movably extends into the inner side of the lower end of the embedded cover, and the embedded cover is fixedly connected to the lower surface of the mounting frame, the embedded cover is movably penetrated by a control frame, and the part of the control frame arranged in the embedded cover is connected with a penetration rod, the penetration rod passes through the inclined groove, and the inclined groove is arranged on the follower block, and the inclined groove passes through the two sides of the follower block, the two sides of the outside of the control frame are axially connected with shaft rods, and the upper end of the shaft rod movably extends into the lower end of the corresponding shaft tube, and the upper end of the shaft tube is axially connected to the lower surface of the mounting frame. , and a spring four is arranged between the lower end of the shaft tube and the outer side of the corresponding shaft rod, the positioning hole is arranged on the lower surface of the upper support plate, and the upper end of the positioning rod is movably inserted into the positioning hole, a servo motor is installed on the inner side of the mounting frame, and the shaft end key of the servo motor is connected with a toggle gear, the upper contact of the toggle gear is connected with a toggle tooth one, and the toggle tooth one is fixedly connected to the lower end of the vibration shaft, the vibration shaft movably passes through the upper part of the mounting frame, and the upper surface of the vibration shaft is in contact with the lower surface of the upper support plate, and the lower end of the positioning rod is movably inserted into To the inside of the vibration shaft, and the lower part of the vibration shaft is provided with a strip-shaped through-groove that penetrates into the inside thereof, a frame rod is provided on the strip-shaped through-groove, and the frame rod is fixedly connected to the lower end of the positioning rod, the axis of the positioning rod and the frame rod are colinear, and the two end portions of the lower part of the frame rod are both movably penetrated through the lower part of the mounting frame, two limiting rods are symmetrically connected to the middle and upper part of the vibration shaft, and the limiting rods also movably penetrate the upper part of the mounting frame, which are used to limit the vibration shaft to prevent it from rotating relative to the toggle gear, and a spring three is provided between the lower end of the positioning rod and the inner bottom end of the vibration shaft.

[0006] Preferably, both ends of the sliding plate are rigid structures, and the sliding plate portion between the protrusions at the lower end of the mounting frame is an elastic plastic structure.

[0007] Preferably, the portion of the control frame that passes through the interlocking cover is one side of the two U-shaped structures, and the other side of the U-shaped structure is connected to the corresponding lower end of the shaft rod, and the penetrating rod is arranged between the two U-shaped structures.

[0008] Preferably, the distribution trajectory of the positioning holes is the same as the spiral track.

[0009] Preferably, the frame rod is an n-shaped structure, and the axes of the frame rod, the positioning rod and the vibration shaft are colinear.

[0010] Preferably, the portion of the positioning block corresponding to the lower end of the n-shaped extrusion block and the lower end cross-section of the n-shaped extrusion block are both equiangular trapezoidal structures, so that the n-shaped extrusion block moves downward and the corresponding two positioning blocks move away from each other, thereby achieving the purpose of fixing the sliding plate on the spiral track.

[0011] Preferably, the horizontal vibration mechanism includes a toggle ring tooth and an annular sleeve, the annular sleeve is fixedly connected to the upper surface of the mounting frame, and the annular sleeve and the vibration shaft are coaxially arranged, the upper end of the annular sleeve is slidably connected with a clamping sleeve in a snap-fitting manner, and the lower end of the clamping sleeve is threadedly connected to a fixing bolt, the fixing bolt extends into the end bearing in the clamping sleeve and is connected to a fixed arc plate, and the fixed arc plate is extruded and contacted with the outer side of the annular sleeve, the upper end of the clamping sleeve is fixedly connected to a connecting pipe, and the connecting pipe moves toward the inner side of one end of the vibration shaft and extends into one end of a connecting rod, the other end of the connecting rod is fixedly provided with a toggle gear pressure 2, and the toggle gear pressure 2 is contact-connected to the outer side of the toggle ring tooth, the toggle ring tooth key is connected to the outer side of the vibration shaft, the end of the connecting pipe facing away from the vibration shaft is threadedly connected to an adjusting rod, and a spring 2 is provided between one end of the adjusting rod in the connecting pipe and one end of the connecting rod extending into the connecting pipe.

[0012] Preferably, the axes of the connecting rod, the connecting tube and the adjusting rod are collinear, and the axes of the three intersect the axis of the vibration shaft at right angles.

[0013] Compared with the prior art, the invention has the following beneficial effects: the multi-directional seismic test platform for civil engineering structures can not only adjust the position of vibration, thereby detecting the influence of the vibration source on the civil engineering structure at different orientations and distances from the civil engineering structure, but also perform horizontal vibration on the civil engineering structure, thereby facilitating a comprehensive detection of the seismic performance of the civil engineering structure. With the use of a variety of sensors, the degree of vertical vibration and horizontal vibration can be controlled to avoid excessive degree, which leads to instability of the test platform itself and thus affects the test results of the civil engineering structure: 1. The spiral track and the spirally distributed positioning holes can fix the vertical vibration mechanism and the horizontal vibration mechanism of the vibration source in the simulated earthquake at different positions between the upper support plate and the lower support plate, so as to detect the influence of the vibration source on the civil engineering structure at different positions and distances from the civil engineering structure; 2. The operation of the servo motor can drive the toggle gear to rotate, and then toggle the toggle tooth 1, so that the vibration shaft vibrates up and down. In the process of the vibration shaft vibrating up and down, the vertical vibration will be applied to the upper support plate. When the vibration shaft vibrates up and down, the toggle ring gear will toggle the tooth pressure 2. The toggle tooth pressure 2 and the toggle ring gear will move relative to each other, which can apply horizontal vibration to the vibration shaft. The upper support plate is restricted by the positioning hole and the positioning rod, so that the horizontal vibration can be transmitted to the upper support plate through the vibration shaft. By applying horizontal vibration and vertical vibration to the upper support plate, the civil engineering structure of the upper support plate can receive dual vibration in the horizontal and vertical directions, which is helpful to comprehensively detect the seismic performance of the civil engineering structure. 3. By moving the ferrule on the annular sleeve, the direction of horizontal vibration can be changed, which helps to further detect the seismic performance of civil engineering structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of point A; Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of point B in the middle; Figure 5 This is a schematic diagram of the connection structure between the sliding plate and the vibration shaft of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of partial cross-section structure; Figure 7 For the present invention Figure 6 The schematic diagram of the enlarged structure of point C in the middle; Figure 8 It is a schematic diagram of the connection structure between the positioning rod and the rack rod of the present invention; Fig. 9 For the present invention Figure 8 The enlarged structural diagram of point D in the middle; Fig.10 This is a bottom view of the structure of the upper support plate of the present invention.

[0015] In the figure: 1, lower support plate; 2, support tube; 3, support rod; 4, upper support plate; 5, spring 1; 6, spiral track; 7, sliding plate; 8, positioning hole; 9, positioning rod; 10, T-shaped slot; 11, positioning block; 12, n-shaped extrusion block; 13, follower block; 14, inclined slot; 15, through rod; 16, control frame; 17, frame rod; 18, strip through slot; 19, toggle tooth 1; 20, installation Frame; 21, toggle gear; 22, vibration shaft; 23, toggle ring gear; 24, toggle gear pressure two; 25, connecting rod; 26, connecting pipe; 27, spring two; 28, adjusting rod; 29, clamping sleeve; 30, fixing bolt; 31, fixing arc plate; 32, annular sleeve; 33, limiting rod; 34, servo motor; 35, spring three; 36, mosaic cover; 37, shaft tube; 38, shaft rod; 39, spring four. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: Embodiment 1: In order to solve the problem that the conventional seismic test platform is not convenient for adjusting the vibration direction, and thus cannot adjust the distance and direction of the vibration source from the civil engineering structure, the following technical solution is provided, specifically, A multi-directional seismic test platform for civil engineering structures, comprising a lower support plate 1, an upper support plate 4, a vertical vibration mechanism and a horizontal vibration mechanism, support tubes 2 are provided at the four corners of the upper surface of the lower support plate 1, and the lower ends of the corresponding support rods 3 are extended into the inner sides of the upper ends of the support tubes 2, the upper ends of the four support rods 3 are fixedly connected to the four corners of the lower surface of the upper support plate 4, and a spring 5 nested in the outer side of the support rod 3 is provided between the upper end of the support tube 2 and the lower surface of the upper support plate 4, a vertical vibration mechanism with adjustable vibration position is provided between the upper surface of the lower support plate 1 and the lower surface of the upper support plate 4, and a sensor for monitoring the vibration of the test platform is also provided on the upper support plate 4, and through the setting of the sensor, the stability of the upper support plate 4 can be monitored when the vertical vibration mechanism and the horizontal vibration mechanism make the upper support plate 4 vibrate in both vertical and horizontal directions.

[0018] The vertical vibration mechanism includes a spiral track 6, a positioning hole 8, a positioning rod 9, an inclined groove 14 and a vibration shaft 22, the spiral track 6 is arranged on the upper surface of the lower support plate 1, and a sliding plate 7 is slidably connected to the spiral track 6, the upper end of the sliding plate 7 is connected to the lower end protrusion of the mounting frame 20, and two inverted T-slots 10 are arranged on the upper surface of the sliding plate 7, and the two lower ends of the inverted T-slots 10 are slidably connected with positioning blocks 11, and the positioning blocks 11 are extruded and contacted with the spiral track 6, the two inverted T-slots 10 are extruded and connected by an n-shaped extrusion block 12, and the upper end of the n-shaped extrusion block 12 is fixedly connected with a follower block 13, the upper end of the follower block 13 movably extends into the inner side of the lower end of the chimeric cover 36, and the chimeric cover 36 is fixedly connected to the lower surface of the mounting frame 20. The control frame 16 is movably penetrated on the chimeric cover 36, and the part of the control frame 16 arranged in the chimeric cover 36 is connected with the penetrating rod 15, the penetrating rod 15 is arranged through the inclined slot 14, and the inclined slot 14 is arranged on the follower block 13, and the inclined slot 14 is arranged through both sides of the follower block 13, and the two sides of the outside of the control frame 16 are axially connected with the shaft rod 38, and the upper end of the shaft rod 38 is movably extended to the lower end of the corresponding shaft tube 37, the upper end of the shaft tube 37 is axially connected to the lower surface of the mounting frame 20, and a spring 39 is arranged between the lower end of the shaft tube 37 and the outer side of the corresponding shaft rod 38, the positioning hole 8 is arranged on the lower surface of the upper support plate 4, and the upper end of the positioning rod 9 is movably extended into the positioning hole 8, and the servo motor 34 is installed on the inner side of the mounting frame 20, and the servo motor The shaft end key of 34 is connected with a toggle gear 21, and the upper contact of the toggle gear 21 is connected with a toggle tooth 19, and the toggle tooth 19 is fixedly connected to the lower end of the vibration shaft 22, the vibration shaft 22 movably passes through the upper part of the mounting frame 20, and the upper surface of the vibration shaft 22 is in contact with the lower surface of the upper support plate 4, the lower end of the positioning rod 9 movably extends into the interior of the vibration shaft 22, and the lower part of the vibration shaft 22 is provided with a strip-shaped through-groove 18 that penetrates into the interior thereof, the strip-shaped through-groove 18 is provided with a frame rod 17, and the frame rod 17 is fixedly connected to the lower end of the positioning rod 9, the axes of the positioning rod 9 and the frame rod 17 are colinear, and the two ends of the lower part of the frame rod 17 are movably passed through the lower part of the mounting frame 20, and the middle and upper parts of the vibration shaft 22 are symmetrically connected with two limit rods 33, and The limiting rod 33 also movably penetrates the upper part of the mounting frame 20, and is used to limit the vibration shaft 22 to prevent it from rotating relative to the toggle gear 21. A spring 35 is arranged between the lower end of the positioning rod 9 and the inner bottom end of the vibration shaft 22. When in use, the frame rod 17 is pressed down to disengage the positioning rod 9 from the positioning hole 8 engaged at this time, and then the sliding plate 7 is slid to a suitable position on the spiral track 6, and the frame rod 17 is released. The positioning rod 9 will be engaged in the positioning hole 8 at a suitable position under the reset action of the spring 35, and then the control frame 16 is pushed. The control frame 16 drives the penetration rod 15 to move horizontally. Through the action of the inclined slot 14, the follower block 13 can move downward relative to the engaging cover 36. The follower block 13 moves downward, and synchronously drives the n-shaped extrusion block 12 to move downward.The n-shaped extrusion block 12 gradually squeezes the positioning block 11, so that the two positioning blocks 11 on the same side are separated from each other, thereby clamping the spiral track 6, so that the sliding plate 7 is fixed in a suitable position of the spiral track 6, and then the servo motor 34 is turned on, and the servo motor 34 drives the toggle gear 21 to rotate, thereby continuously hitting the toggle gear 19, so that the toggle gear 19 drives the vibration shaft 22 to continuously hit the upper support plate 4, so that the vertical vibration can be transmitted to the civil engineering structure supported on the upper support plate 4, so as to detect the degree of vibration influence on the civil engineering structure in the vertical direction. The two ends of the sliding plate 7 are rigid structures, and the sliding plate 7 between the protrusions at the lower end of the mounting frame 20 is It is divided into an elastic plastic structure, the part of the control frame 16 that penetrates the embedded cover 36 is one side of the two square-shaped structures, and the other side of the square is connected to the lower end of the corresponding shaft rod 38, and the penetrating rod 15 is set between the two square-shaped structures, the distribution track of the positioning hole 8 is the same as the spiral track 6, the frame rod 17 is an n-shaped structure, and the axis of the frame rod 17, the positioning rod 9 and the vibration shaft 22 are collinear, the positioning block 11 faces the corresponding lower end of the n-shaped extrusion block 12 and the lower end section of the n-shaped extrusion block 12 are both equiangular trapezoidal structures, so that the n-shaped extrusion block 12 moves downward, and the corresponding two positioning blocks 11 are away from each other, so as to achieve the purpose of fixing the sliding plate 7 on the spiral track 6.

[0019] Embodiment 2: In order to solve the problem that the previous seismic test platform cannot provide horizontal vibration, which is not conducive to comprehensive detection of the seismic performance of civil engineering structures, the following technical solution is provided, specifically, a horizontal vibration mechanism with adjustable vibration direction is arranged in the middle of the vertical vibration mechanism.

[0020] The horizontal vibration mechanism includes a toggle ring gear 23 and an annular sleeve 32, the annular sleeve 32 is fixedly connected to the upper surface of the mounting frame 20, and the annular sleeve 32 and the vibration shaft 22 are coaxially arranged, the upper end of the annular sleeve 32 is slidably connected with a clamping sleeve 29, and the lower end of the clamping sleeve 29 is threadedly connected with a fixing bolt 30, and the fixing bolt 30 extends into the clamping sleeve 29. One end of the bearing is connected to a fixed arc plate 31, and the fixed arc plate 31 is connected to the outer side of the annular sleeve 32 by extrusion contact, and the upper end of the clamping sleeve 29 is fixedly connected with a connecting The connecting pipe 26 is connected to the inner side of one end of the vibration shaft 22, and one end of the connecting rod 25 is movably extended into the inner side of one end of the connecting pipe 26 toward the vibration shaft 22. The other end of the connecting rod 25 is fixedly provided with a toggle gear pressure 24, and the toggle gear pressure 24 is contacted and connected to the outer side of the toggle ring gear 23. The toggle ring gear 23 is key-connected to the outer side of the vibration shaft 22. The end of the connecting pipe 26 facing away from the vibration shaft 22 is threadedly connected with an adjusting rod 28, and between one end of the adjusting rod 28 in the connecting pipe 26 and one end of the connecting rod 25 extending into the connecting pipe 26, a plurality of connecting rods 25 are connected to the connecting pipe 26. A spring 27 is provided. When in use, the up and down reciprocating movement of the vibration shaft 22 can make the toggle ring tooth 23 move relative to the toggle tooth pressure 24, and then the horizontal vibration can be applied to the vibration shaft 22 by the movement of the toggle tooth pressure 24. The horizontal vibration applied to the vibration shaft 22, due to the limitation of the positioning hole 8 and the positioning rod 9, the vibration shaft 22 cannot move in the horizontal direction, and then the horizontal vibration can be transmitted to the upper support plate 4, and then the horizontal vibration can be applied to the civil engineering structure on the upper support plate 4. By applying horizontal vibration and vertical vibration to the civil engineering structure at the same time, the seismic performance of the civil engineering structure can be more comprehensively detected. In addition, by moving the clamping sleeve 29 on the annular sleeve 32, the direction of the horizontal vibration can also be adjusted, which is conducive to further improving the comprehensiveness of detecting the seismic performance of the civil engineering structure. The axes of the connecting rod 25, the connecting pipe 26 and the adjusting rod 28 are collinear, and the axes of the three intersect the axis of the vibration shaft 22 at a right angle.

[0021] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional seismic test platform for civil engineering structures, comprising a lower support plate (1), an upper support plate (4), a vertical vibration mechanism and a horizontal vibration mechanism, characterized in that: The four corners of the upper surface of the lower support plate (1) are each provided with a support tube (2), and the lower ends of corresponding support rods (3) are extended into the inner sides of the upper ends of the support tubes (2), the upper ends of the four support rods (3) are fixedly connected to the four corners of the lower surface of the upper support plate (4), and a spring (5) is arranged between the upper ends of the support tubes (2) and the lower surface of the upper support plate (4) and is nested in the outer sides of the support rods (3). A vertical vibration mechanism with adjustable vibration position is arranged between the upper surface of the lower support plate (1) and the lower surface of the upper support plate (4), and a horizontal vibration mechanism with adjustable vibration direction is arranged in the middle of the vertical vibration mechanism. A sensor for monitoring the vibration of the test platform is also arranged on the upper support plate (4). By setting the sensor, the stability of the upper support plate (4) can be monitored when the vertical vibration mechanism and the horizontal vibration mechanism cause the upper support plate (4) to vibrate in both vertical and horizontal directions.

2. The multi-directional seismic test platform for civil engineering structures according to claim 1, characterized in that: The vertical vibration mechanism comprises a spiral track (6), a positioning hole (8), a positioning rod (9), an inclined groove (14) and a vibration shaft (22); the spiral track (6) is arranged on the upper surface of the lower support plate (1), and a sliding plate (7) is slidably connected to the spiral track (6); the upper end of the sliding plate (7) is connected to the lower end protrusion of the mounting frame (20), and two inverted T-shaped grooves (10) are arranged on the upper surface of the sliding plate (7); two lower ends of the inverted T-shaped grooves (10) are slidably connected to positioning blocks (11), and the positioning blocks (11) are connected to the spiral track (6) by extrusion contact; the two inverted T-shaped grooves (10) are connected by extrusion through an n-shaped extrusion block (12), and the upper end of the n-shaped extrusion block (12) is fixed A follower block (13) is fixedly connected, the upper end of the follower block (13) movably extends into the inner side of the lower end of the embedded cover (36), and the embedded cover (36) is fixedly connected to the lower surface of the mounting frame (20), the embedded cover (36) is movably penetrated by a control frame (16), and the control frame (16) is connected to a penetration rod (15) on the part of the embedded cover (36), the penetration rod (15) penetrates the inclined groove (14), and the inclined groove (14) is arranged on the follower block (13), and the inclined groove (14) penetrates the two sides of the follower block (13), the two sides of the outside of the control frame (16) are axially connected with a shaft rod (38), and the upper end of the shaft rod (38) movably extends into the lower end of the corresponding shaft tube (37), and the shaft tube (37) is connected to the control frame (16). The upper end shaft of the shaft tube (37) is connected to the lower surface of the mounting frame (20), and a spring (39) is arranged between the lower end of the shaft tube (37) and the outer side of the corresponding shaft rod (38), the positioning hole (8) is arranged on the lower surface of the upper support plate (4), and the upper end of the positioning rod (9) is movably inserted into the positioning hole (8), a servo motor (34) is installed on the inner side of the mounting frame (20), and the shaft end key of the servo motor (34) is connected to a toggle gear (21), the upper contact of the toggle gear (21) is connected to a toggle tooth (19), and the toggle tooth (19) is fixedly connected to the lower end of the vibration shaft (22), the vibration shaft (22) movably passes through the upper part of the mounting frame (20), and the upper surface of the vibration shaft (22) is in contact with the upper support plate ( 4), the lower end of the positioning rod (9) movably extends into the interior of the vibration shaft (22), and the lower part of the vibration shaft (22) is provided with a strip-shaped through-groove (18) penetrating into the interior thereof, a frame rod (17) is provided on the strip-shaped through-groove (18), and the frame rod (17) is fixedly connected to the lower end of the positioning rod (9), the axes of the positioning rod (9) and the frame rod (17) are colinear, and the two ends of the lower part of the frame rod (17) are movably penetrated through the lower part of the mounting frame (20), the middle and upper part of the vibration shaft (22) are symmetrically connected with two limiting rods (33), and the limiting rods (33) are also movably penetrated through the upper part of the mounting frame (20), and are used to limit the vibration shaft (22) to prevent it from rotating relative to the toggle gear (21),A spring three (35) is provided between the lower end of the positioning rod (9) and the inner bottom end of the vibration shaft (22).

3. The multi-directional seismic test platform for civil engineering structures according to claim 2, characterized in that: Both ends of the sliding plate (7) are rigid structures, and the portion of the sliding plate (7) between the protrusions at the lower end of the mounting frame (20) is an elastic plastic structure.

4. The multi-directional seismic test platform for civil engineering structures according to claim 3, characterized in that: The portion of the control frame (16) that passes through the interlocking cover (36) is one side of the two U-shaped structures, and the other side of the U-shaped structure is axially connected to the lower end of the corresponding shaft rod (38), and the penetrating rod (15) is arranged between the two U-shaped structures.

5. The multi-directional seismic test platform for civil engineering structures according to claim 4, characterized in that: The distribution track of the positioning holes (8) is the same as that of the spiral track (6).

6. The multi-directional seismic test platform for civil engineering structures according to claim 5, characterized in that: The frame rod (17) is an n-shaped structure, and the axes of the frame rod (17), the positioning rod (9) and the vibration shaft (22) are colinear.

7. The multi-directional seismic test platform for civil engineering structures according to claim 6, characterized in that: The portion of the positioning block (11) facing the corresponding lower end of the n-shaped extrusion block (12) and the lower end cross-section of the n-shaped extrusion block (12) are both equiangular trapezoidal structures, so that when the n-shaped extrusion block (12) moves downward, the corresponding two positioning blocks (11) move away from each other, thereby achieving the purpose of fixing the sliding plate (7) on the spiral track (6).

8. The multi-directional seismic test platform for civil engineering structures according to claim 7, characterized in that: The horizontal vibration mechanism comprises a toggle ring gear (23) and an annular sleeve (32), wherein the annular sleeve (32) is fixedly connected to the upper surface of the mounting frame (20), and the annular sleeve (32) and the vibration shaft (22) are coaxially arranged, the upper end of the annular sleeve (32) is slidably connected to a clamping sleeve (29), and the lower end of the clamping sleeve (29) is threadedly connected to a fixing bolt (30), one end of the fixing bolt (30) extending into the clamping sleeve (29) is connected to a fixed arc plate (31), and the fixed arc plate (31) is connected to the outer side of the annular sleeve (32) by extrusion contact, and the upper end of the clamping sleeve (29) is fixedly connected to a connecting pipe (2 6), and one end of a connecting rod (25) is movably extended into the inner side of one end of the connecting tube (26) toward the vibration shaft (22), and the other end of the connecting rod (25) is fixedly provided with a second toggle gear pressure (24), and the second toggle gear pressure (24) is contact-connected to the outer side of a toggle ring gear (23), and the toggle ring gear (23) is key-connected to the outer side of the vibration shaft (22), and an adjusting rod (28) is threadedly connected to one end of the connecting tube (26) facing away from the vibration shaft (22), and a second spring (27) is provided between one end of the adjusting rod (28) in the connecting tube (26) and one end of the connecting rod (25) extending into the connecting tube (26).

9. The multi-directional seismic test platform for civil engineering structures according to claim 8, characterized in that: The axes of the connecting rod (25), the connecting tube (26) and the adjusting rod (28) are collinear, and the axes of the three intersect the axis of the vibration shaft (22) at right angles.

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