Device and method for detecting shock strength of building structure

Abstract

The invention discloses a building structure anti-seismic strength detection device and method, and belongs to the technical field of anti-seismic detection devices.The building structure anti-seismic strength detection device comprises a simulation frame, a plurality of moving tables are arranged on the two sides of the top face of the simulation frame, sliding grooves are formed in the two sides of the top face of the simulation frame, sliding blocks are fixed to the bottom faces of the moving tables, and the sliding blocks are arranged in the sliding grooves in a sliding mode; placing tables for placing building structure models are arranged on the moving tables, a power mechanism for driving the moving tables to move in the width direction of the simulation frame is arranged on the simulation frame, and a driving mechanism for driving the placing tables to move in the length direction of the moving tables is arranged on the simulation frame. The method has the effect of improving the anti-seismic strength detection precision of the building structure.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake-resistant detection devices, and in particular to an earthquake-resistant strength detection device and a detection method for a building structure. Background Art

[0002] The seismic strength test of building structures mainly simulates the earthquake intensity through earthquake simulators, and applies the simulated earthquake intensity to the building structure model. The earthquake simulator simulates the frequency, amplitude and waveform of real earthquakes, and vibrates the building structure model to different degrees to evaluate the seismic performance of the building structure. Earthquake simulators usually use hydraulic systems or motor drive systems to generate seismic waves, and monitor and record the dynamic response of the building structure model under the action of earthquakes in real time, so as to obtain the seismic resistance of the building structure under different earthquake conditions, and help designers optimize the structural design and improve the seismic resistance.

[0003] In the related art, a Chinese utility model patent with announcement number CN219625010U discloses a device for detecting the seismic strength of a building structure, including a mounting plate, symmetrically provided with connecting blocks on the mounting plate, a vibration motor and a controller fixedly provided between the two connecting blocks, the controller being electrically connected to the vibration motor, a first fixing frame and a second fixing frame being rotatably provided on the connecting block respectively, the first fixing frame and the second fixing frame both including a telescopic assembly and an adjusting assembly, when the first fixing frame and the second fixing frame are cross-overlapped, they are used to support the mounting plate, and when the first fixing frame and the second fixing frame are not cross-overlapped, the adjusting assembly and the telescopic assembly cooperate with each other to fix the mounting plate on the pillar.

[0004] With respect to the above-mentioned related technologies, the mounting plate is fixed to the building pillar by means of a first fixing frame and a second fixing frame, and then the vibration motor is started to generate vibration to simulate the seismic strength test of the building structure, so that the simulated vibration direction is relatively single, resulting in low seismic test accuracy of the building structure. Summary of the invention

[0005] In order to improve the problem that when simulating earthquake resistance of building structures, the simulated vibration direction is relatively single, resulting in low accuracy of earthquake resistance detection of building structures, the present application provides a building structure earthquake resistance strength detection device and detection method.

[0006] In the first aspect, the present application provides a building structure seismic strength detection device that adopts the following technical solution: A device for detecting the seismic strength of a building structure comprises a simulation frame, a plurality of movable platforms are arranged on both sides of the top surface of the simulation frame, slide grooves are opened on both sides of the top surface of the simulation frame, a slider is fixed to the bottom surface of the movable platform, the slider is slidably arranged in the slide groove, a placement platform for placing a building structure model is arranged on the movable platform, a power mechanism for driving the plurality of movable platforms to move along the width direction of the simulation frame is arranged on the simulation frame, and a driving mechanism for driving the placement platform to move along the length direction of the movable platform is arranged on the simulation frame.

[0007] By adopting the above technical solution, when it is necessary to conduct a seismic strength test on the building structure, the building structure model is fixed on the placement table, and then the mobile table is driven by the power mechanism to drive the placement table to move along the width direction of the simulation frame. At the same time, the driving mechanism drives the placement table to move along the length direction of the mobile table, so that the placement table drives the building structure model to move back and forth along the width direction and the length direction of the simulation frame, simulating the longitudinal wave and the transverse wave of the earthquake, thereby improving the seismic detection accuracy of the building structure.

[0008] Preferably, the placement table includes a moving seat slidably arranged on the top surface of the moving table, a placement plate for placing the building structure model is arranged above the moving seat, springs are fixed at the bottom corners of the placement plate, the bottom end of the spring is fixed to the top surface of the moving seat, and a vibration motor is arranged on the bottom surface of the placement plate.

[0009] By adopting the above technical solution, when the placement table drives the building structure model to move back and forth along the width and length directions of the simulation frame, the vibration motor is started at the same time, the vibration motor drives the placement plate to shake, and the placement plate drives the building structure to shake, thereby further improving the seismic detection accuracy of the building structure.

[0010] Preferably, side plates are fixed on both sides of the top surface of the simulation frame, and the driving mechanism includes two moving rods arranged between the two side plates, and guide blocks are fixed to both end surfaces of the moving rods. Guide grooves are provided on both sides of the sides of the two side plates close to each other, and the guide blocks are slidably arranged in the guide grooves. A connecting rod is fixed to the side of the moving seat close to the moving rod, and a ring is fixed to the end of the connecting rod away from the moving seat, and the ring is sleeved on the outer circumferential surface of the moving rod. A driving component for driving the two moving rods to move in a direction away from or close to each other is provided on the side plates.

[0011] By adopting the above technical solution, the driving component is started, and the driving component drives the two moving rods to move toward or away from each other, and the moving rods drive the connecting rods to move back and forth, so that the connecting rods drive the moving seat to move along the length direction of the moving platform, and the moving seat drives the placement plate to move, so that the placement plate drives the building structure model to move back and forth along the length direction of the placement plate.

[0012] Preferably, the driving assembly includes a rotating shaft rotatably installed between two side plates, a gear is provided on the rotating shaft, mounting blocks are fixed on the two movable rods, the two mounting blocks are respectively located above and below the rotating shaft, racks are fixed on the sides of the two mounting blocks close to each other, the two racks are respectively meshed with the gears, a forward and reverse motor is fixed on the side of one of the side plates, and the output shaft of the forward and reverse motor is fixedly connected to one end of the rotating shaft.

[0013] By adopting the above technical solution, the forward and reverse motors are started, and the output shafts of the forward and reverse motors drive the rotating shaft to rotate, the rotating shaft drives the gear to rotate, and the gear drives the two racks to move toward or away from each other, thereby causing the two racks to drive the two moving rods to move toward or away from each other.

[0014] Preferably, a slide rail is fixed on the top surface of the movable platform, a slide groove is provided on the bottom surface of the movable seat, the slide rail is arranged in the slide groove, and the movable seat is slidably connected to the slide rail along the length direction of the slide rail.

[0015] By adopting the above technical solution, when the moving seat reciprocates on the moving platform, the moving seat also slides on the slide rail, thereby improving the movement stability of the moving seat.

[0016] Preferably, the power mechanism includes a screw rotatably installed between the opposite inner sides of the slide groove, the screw passes through the slider, the screw is threadedly connected to the slider, one end of the screw passes through the side of the simulation frame, and a pulley 1 is provided at the end of the rotating shaft away from the forward and reverse motors, and pulleys 2 are provided on both screws, and the outer peripheral surface of pulley 1 is respectively wrapped with a transmission belt with the outer peripheral surface of the two pulleys 2.

[0017] By adopting the above technical solution, when the rotating shaft rotates forward and backward, the rotating shaft drives pulley one to rotate forward and backward, pulley one drives two transmission belts to rotate forward and backward, the two transmission belts respectively drive two pulleys to rotate forward and backward, the two pulleys respectively drive two screws to rotate forward and backward, so that the screw drives the slider to move back and forth, thereby causing the slider to drive the moving platform to move back and forth along the width direction of the simulation frame.

[0018] Preferably, a mounting groove is provided on the inner circumference of the ring, and a ball is rotatably mounted in the mounting groove, and the ball can roll on the outer circumference of the moving rod.

[0019] By adopting the above technical solution, balls are rollingly installed on the inner circumference of the ring. When the moving platform drives the moving seat to move along the width direction of the simulation frame, the moving seat drives the connecting rod to move, and the connecting rod drives the ring to move, so that the balls on the ring roll on the outer circumference of the moving rod, thereby reducing the friction between the inner circumference of the ring and the outer circumference of the moving rod, making it easier for the moving seat to move along the width direction of the simulation frame.

[0020] Preferably, moving blocks are fixed on both side surfaces of the sliding block, and moving grooves are provided on the opposite inner side surfaces of the sliding grooves, and the moving blocks are slidably arranged in the moving grooves.

[0021] By adopting the above technical solution, when the slider moves in the slide groove, the slider drives the moving block to move in the moving groove, so that the slider moves more stably in the slide groove.

[0022] In a second aspect, the present application provides a method for detecting the seismic strength of a building structure, which adopts the following technical solution: A method for detecting the seismic strength of a building structure comprises the following steps: S1: The building structure model is fixed on the top surface of the placement plate, and the vibration motor is started; S2: Motor, the output shaft of the forward and reverse motor drives the rotating shaft forward and reverse, the rotating shaft drives the gear forward and reverse, the gear drives the two racks to move towards or away from each other, so that the rack drives the moving rod to move back and forth, the moving rod drives the connecting rod to move back and forth, the connecting rod drives the moving seat to move back and forth, so that the moving seat drives the placement plate to move back and forth to shake the building structure model; S3: The rotating shaft drives pulley one to rotate forward and reversely, pulley one drives the transmission belt to rotate forward and reversely, the transmission belt drives pulley two to rotate forward and reversely, and pulley two drives the screw to rotate forward and reversely, so that the screw drives the slider to drive the moving platform to move back and forth along the axial direction of the screw, and the moving platform drives the moving seat and the placement plate to move back and forth along the axial direction of the screw to shake the building structure model.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. When it is necessary to conduct a seismic strength test on the building structure, the building structure model is fixed on the placement table, and then the mobile table is driven by the power mechanism to drive the placement table to move along the width direction of the simulation frame, and at the same time, the driving mechanism drives the placement table to move along the length direction of the mobile table, so that the placement table drives the building structure model to move back and forth along the width direction and length direction of the simulation frame, simulating the longitudinal wave and transverse wave of the earthquake, thereby improving the seismic detection accuracy of the building structure; 2. Start the driving assembly, which drives the two moving rods to move toward or away from each other, and the moving rods drive the connecting rods to move back and forth, so that the connecting rods drive the moving seat to move along the length direction of the moving platform, so that the moving seat drives the placement plate to move, so that the placement plate drives the building structure model to move back and forth along the length direction of the placement plate; 3. When the rotating shaft rotates forward and backward, the rotating shaft drives pulley 1 to rotate forward and backward, pulley 1 drives two transmission belts to rotate forward and backward, the two transmission belts respectively drive two pulleys 2 to rotate forward and backward, the two pulleys 2 respectively drive two screws to rotate forward and backward, so that the screw drives the slider to move back and forth, thereby the slider drives the moving platform to move back and forth along the width direction of the simulation frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the seismic strength detection device for the building structure model according to the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the mobile seat in the embodiment of the present application.

[0026] Figure 3 yes Figure 1 A magnified schematic diagram of center A.

[0027] Figure 4 It is a schematic diagram of the structure of the ring in the embodiment of the present application.

[0028] Figure 5 It is a cross-sectional view of the simulation frame in the embodiment of the present application.

[0029] Figure numerals: 1. simulation frame; 11. moving table; 2. placement table; 21. moving seat; 22. placement plate; 23. spring; 24. vibration motor; 25. slide rail; 26. sliding groove; 3. driving mechanism; 31. side plate; 32. moving rod; 33. ring; 34. connecting rod; 35. mounting groove; 36. ball; 37. guide block; 38. guide groove; 4. rotating shaft; 41. mounting block; 42. gear; 43. rack; 44. forward and reverse motor; 5. slide groove; 51. slider; 52. moving block; 53. moving groove; 6. power mechanism; 61. screw; 62. pulley one; 63. pulley two; 64. transmission belt. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The embodiment of the present application discloses a device for detecting the seismic strength of a building structure.

[0032] Reference Figure 1 A device for detecting the seismic strength of a building structure includes a simulation frame 1, and a plurality of movable platforms 11 are arranged on both sides of the top surface of the simulation frame 1. The plurality of movable platforms 11 are arranged at equal intervals along the width direction of the simulation frame 1, and a power mechanism 6 for driving the plurality of movable platforms 11 to move along the width direction of the simulation frame 1 is arranged on the simulation frame 1.

[0033] Reference Figure 1 and Figure 2The top surface of the moving platform 11 is provided with a placing platform 2, which includes a moving seat 21 arranged on the top surface of the moving platform 11, and a placing plate 22 for fixing the building structure model is arranged above the moving seat 21, and springs 23 are fixed at the bottom corners of the placing plate 22, and the bottom end of the spring 23 is fixed to the top surface of the moving seat 21, and a vibration motor 24 is fixed to the bottom surface of the placing plate 22. A slide rail 25 is fixed to the top surface of the moving platform 11, and the slide rail 25 is arranged along the length direction of the moving platform 11. The bottom surface of the moving seat 21 is provided with a sliding groove 26, and the sliding groove 26 runs through the two side surfaces of the moving seat 21. The slide rail 25 is penetrated in the sliding groove 26, and the slide rail 25 is slidably connected to the inner wall of the sliding groove 26. The simulation frame 1 is provided with a driving mechanism 3 for driving the placing platform 2 to reciprocate along the length direction of the moving platform 11.

[0034] The building structure model is fixed on the placement plate 22, and then the vibration motor 24 is started, so that the vibration motor 24 drives the placement plate 22 to shake, and then the mobile platform 11 is driven by the power mechanism 6 to move along the width direction of the simulation frame 1, so that the mobile platform 11 drives the placement platform 2 to move along the width direction of the simulation frame 1, and then the placement platform 2 is driven by the driving mechanism 3 to move along the length direction of the mobile platform 11, simulating the shaking of the building during an earthquake and the longitudinal and transverse waves generated by the earthquake, thereby completing the seismic strength test of the building structure.

[0035] Reference Figure 1 and Figure 3 Side plates 31 are fixed on both sides of the top surface of the simulation frame 1. The driving mechanism 3 includes a moving rod 32 arranged between the two side plates 31. Guide blocks 37 are fixed on both end surfaces of the two moving rods 32. Guide grooves 38 are provided on both sides of the sides of the two side plates 31 close to each other. The guide blocks 37 are slidably arranged in the guide grooves 38. A connecting rod 34 is fixed on the side of the moving seat 21 close to the moving rod 32. A ring 33 is fixed on the end surface of the connecting rod 34 away from the moving seat 21. The ring 33 is sleeved on the outer peripheral surface of the moving rod 32.

[0036] Reference Figure 1 and Figure 4 The inner circumference of the ring 33 is provided with a plurality of mounting grooves 35 , which are arranged at equal intervals along the circumference of the ring 33 , and balls 36 are rotatably mounted in the mounting grooves 35 , and the balls 36 can roll on the outer circumference of the moving rod 32 .

[0037] Reference Figure 1 and Figure 2A rotating shaft 4 is rotatably mounted between the two side plates 31, and the rotating shaft 4 is located between the two moving rods 32. Gears 42 are sleeved and fixed at both ends of the rotating shaft 4. Mounting blocks 41 are fixed at both ends of the two moving rods 32. The two mounting blocks 41 on one of the moving rods 32 are located above the moving rod 32, and the two mounting blocks 41 on the other moving rod 32 are located below the moving rod 32. A rack 43 is fixed on the side of the mounting block 41 close to the rotating shaft 4. The racks 43 on the two opposite mounting blocks 41 on the two moving rods 32 are located above and below the gear 42, respectively, and the two racks 43 are meshed with the gear 42, respectively. A forward and reverse motor 44 is fixed on the side of one of the side plates 31, and the output shaft of the forward and reverse motor 44 is fixedly connected to one end of the rotating shaft 4.

[0038] Start the forward and reverse motor 44, the output shaft of the forward and reverse motor 44 drives the rotating shaft 4 to rotate forward and reverse, the rotating shaft 4 drives the gear 42 to rotate forward and reverse, the gear 42 drives the two racks 43 to move in the direction of approaching or moving away from each other, so that the two racks 43 drive the two moving rods 32 to move in the direction of approaching or moving away from each other, so that the moving rod 32 drives the ring 33 to move back and forth, and the ring 33 drives the connecting rod 34 to move back and forth, so that the connecting rod 34 drives the moving seat 21 to move back and forth along the length direction of the moving platform 11, and then the moving seat 21 drives the placement plate 22 to move back and forth along the length direction of the moving platform 11 to shake the building structure model.

[0039] Reference Figure 1 As shown in FIG. 5 , both sides of the top surface of the simulation frame 1 are provided with a slide groove 5, and the bottom surfaces of the moving platforms 11 on both sides of the top surface of the simulation frame 1 are fixed with a slider 51, and the slider 51 is slidably arranged in the slide groove 5. Both sides of the slider 51 are fixed with a moving block 52, and the opposite inner side surfaces of the slide groove 5 are provided with a moving groove 53, and the moving block 52 is slidably arranged in the moving groove 53. The power mechanism 6 includes a screw 61 rotatably installed between the opposite inner sides of the slide groove 5, the screw 61 passes through the slider 51, and the screw 61 is threadedly connected with the slider 51. The end of the rotating shaft 4 away from the forward and reverse motor 44 passes through the side plate 31, and the end of the screw 61 away from the forward and reverse motor 44 passes through the side of the simulation frame 1, and the end of the rotating shaft 4 away from the forward and reverse motor 44 is sleeved and fixed with a pulley 1 62, and the ends of the two screws 61 away from the forward and reverse motor 44 are sleeved and fixed with pulleys 2 63, and the outer peripheral surfaces of the pulley 1 62 and the outer peripheral surfaces of the two pulleys 2 63 are respectively wrapped with a transmission belt 64.

[0040] When the output shaft of the forward and reverse motor 44 drives the rotating shaft 4 to rotate forward and reverse, the rotating shaft 4 drives the pulley 1 62 to rotate forward and reverse, the pulley 1 62 drives the two transmission belts 64 to rotate forward and reverse, the two transmission belts 64 respectively drive the two pulleys 2 63 to rotate forward and reverse, the two pulleys 2 63 respectively drive the two screws 61 to rotate forward and reverse, so that the screw 61 drives the slider 51 to move along the axial direction of the screw 61, and the slider 51 drives the moving platform 11 to reciprocate along the circumferential direction of the screw 61, so that the moving platform 11 drives the placement platform 2 to reciprocate along the axial direction of the screw 61 to slide the building structure model.

[0041] The implementation principle of a device for detecting the seismic strength of a building structure in an embodiment of the present application is as follows: when it is necessary to detect the seismic strength of a building structure, the building structure model is fixed on the placement plate 22 on the top surface of the simulation frame 1, and then the vibration motor 24 is started, so that the vibration motor 24 drives the placement plate 22 to shake, and the placement plate 22 drives the building structure model to shake, simulating the scene of the building shaking during an earthquake. Then the forward and reverse motor 44 is started, so that the output shaft of the forward and reverse motor 44 drives the rotating shaft 4 to rotate forward and reverse, and the rotating shaft 4 drives the gear 42 to rotate forward and reverse, and the gear 42 drives the two racks 43 to move in a direction close to or away from each other, so that the two racks 43 drive the two moving rods 32 to move in a direction close to or away from each other, so that the moving rod 32 drives the connecting rod 34 to move back and forth, and the connecting rod 34 drives the moving seat 21 to move back and forth along the length direction of the moving platform 11, so that the moving seat 21 drives the placement plate 22 to move along the length direction of the moving platform 11 to slide the building structure model; the rotating shaft 4 During forward and reverse rotation, the rotating shaft 4 also drives the pulley 1 62 to rotate forward and reverse, the pulley 1 62 drives the two transmission belts 64 to rotate forward and reverse, the two transmission belts 64 respectively drive the two pulleys 2 63 to rotate forward and reverse, the two pulleys 2 63 respectively drive the two screws 61 to rotate forward and reverse, so that the screw 61 drives the slider 51 to reciprocate along the axial direction of the screw 61, the slider 51 drives the moving platform 11 to reciprocate along the axial direction of the screw 61, and the moving platform 11 drives the placing platform 2 to reciprocate along the axial direction of the screw 61 to shake the building structure model, simulating the longitudinal and transverse waves of the earthquake, thereby improving the seismic detection accuracy of the building structure.

[0042] The present application also discloses a method for detecting the seismic strength of a building structure, comprising the following steps: S1: The building structure model is fixed on the top surface of the placement plate 22, and the vibration motor 24 is started; S2: Motor, the output shaft of the forward and reverse motor 44 drives the rotating shaft 4 forward and reverse, the rotating shaft 4 drives the gear 42 forward and reverse, the gear 42 drives the two racks 43 to move in the direction of approaching or moving away from each other, so that the racks 43 drive the moving rod 32 to move back and forth, the moving rod 32 drives the connecting rod 34 to move back and forth, and the connecting rod 34 drives the moving seat 21 to move back and forth, so that the moving seat 21 drives the placement plate 22 to move back and forth to shake the building structure model; S3: The rotating shaft 4 drives the pulley 1 62 to rotate forward and reversely, the pulley 1 62 drives the transmission belt 64 to rotate forward and reversely, the transmission belt 64 drives the pulley 2 63 to rotate forward and reversely, the pulley 2 63 drives the screw 61 to rotate forward and reversely, so that the screw 61 drives the slider 51 to drive the moving platform 11 to reciprocate along the axial direction of the screw 61, and the moving platform 11 drives the moving seat 21 and the placement plate 22 to reciprocate along the axial direction of the screw 61 to shake the building structure model.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A building structure seismic strength testing device, characterized in that: The invention comprises a simulation frame (1), wherein a plurality of movable platforms (11) are arranged on both sides of the top surface of the simulation frame (1), a slide groove (5) is opened on both sides of the top surface of the simulation frame (1), a slider (51) is fixed to the bottom surface of the movable platform (11), the slider (51) is slidably arranged in the slide groove (5), a placement platform (2) for placing a building structure model is arranged on the movable platform (11), a power mechanism (6) for driving the plurality of movable platforms (11) to move along the width direction of the simulation frame (1) is arranged on the simulation frame (1), and a driving mechanism (3) for driving the placement platform (2) to move along the length direction of the movable platform (11) is arranged on the simulation frame (1).

2. A building structure seismic strength testing device according to claim 1, characterized in that: The placement platform (2) comprises a moving seat (21) slidably arranged on the top surface of the moving platform (11); a placement plate (22) for placing a building structure model is arranged above the moving seat (21); springs (23) are fixed at the corners of the bottom surface of the placement plate (22); the bottom end of the spring (23) is fixed to the top surface of the moving seat (21); and a vibration motor (24) is arranged on the bottom surface of the placement plate (22).

3. A building structure seismic strength testing device according to claim 2, characterized in that: Side plates (31) are fixed on both sides of the top surface of the simulation frame (1); the driving mechanism (3) comprises two moving rods (32) arranged between the two side plates (31); guide blocks (37) are fixed on both end surfaces of the moving rods (32); guide grooves (38) are provided on both sides of the side surfaces of the two side plates (31) close to each other; the guide blocks (37) are slidably arranged in the guide grooves (38); a connecting rod (34) is fixed on the side surface of the moving seat (21) close to the moving rod (32); a circular ring (33) is fixed on one end of the connecting rod (34) away from the moving seat (21); the circular ring (33) is sleeved on the outer peripheral surface of the moving rod (32); and a driving component for driving the two moving rods (32) to move in a direction away from or close to each other is arranged on the side plate (31).

4. A building structure seismic strength testing device according to claim 3, characterized in that: The driving assembly comprises a rotating shaft (4) rotatably mounted between the two side plates (31), a gear (42) being arranged on the rotating shaft (4), a mounting block (41) being fixed on each of the two moving rods (32), the two mounting blocks (41) being respectively located above and below the rotating shaft (4), racks (43) being fixed on mutually adjacent sides of the two mounting blocks (41), the two racks (43) being respectively meshed with the gears (42), a forward and reverse motor (44) being fixed on the side of one of the side plates (31), the output shaft of the forward and reverse motor (44) being fixedly connected to one end of the rotating shaft (4).

5. A building structure seismic strength testing device according to claim 4, characterized in that: A slide rail (25) is fixed on the top surface of the movable platform (11), a slide groove (26) is provided on the bottom surface of the movable seat (21), the slide rail (25) is arranged in the slide groove (26), and the movable seat (21) is slidably connected to the slide rail (25) along the length direction of the slide rail (25).

6. A building structure seismic strength testing device according to claim 4, characterized in that: The power mechanism (6) comprises a screw rod (61) rotatably mounted between the opposite inner side surfaces of the slide groove (5), the screw rod (61) passing through the slider (51), the screw rod (61) being threadedly connected to the slider (51), one end of the screw rod (61) passing through the side surface of the simulation frame (1), a pulley 1 (62) being arranged at one end of the rotating shaft (4) away from the forward and reverse motor (44), two pulleys 2 (63) being arranged on each of the two screw rods (61), and a transmission belt (64) being wound around the outer peripheral surface of the pulley 1 (62) and the outer peripheral surfaces of the two pulleys 2 (63).

7. A building structure seismic strength testing device according to claim 6, characterized in that: The inner circumferential surface of the circular ring (33) is provided with a mounting groove (35), in which a ball (36) is rollingly mounted, and the ball (36) can roll on the outer circumferential surface of the moving rod (32).

8. The device for detecting seismic strength of a building structure according to claim 6, characterized in that: Moving blocks (52) are fixed on both side surfaces of the sliding block (51), and moving grooves (53) are provided on the opposite inner side surfaces of the sliding groove (5), and the moving blocks (52) are slidably arranged in the moving grooves (53).

9. A method for detecting the seismic strength of a building structure, according to a device for detecting the seismic strength of a building structure according to any one of claims 1 to 8, characterized in that: The steps include: S1: Fixing the building structure model on the top surface of the placement plate (22) and starting the vibration motor (24); S2: starting the forward and reverse motor (44), the output shaft of the forward and reverse motor (44) drives the rotating shaft (4) to rotate forward and reverse, the rotating shaft (4) drives the gear (42) to rotate forward and reverse, the gear (42) drives the two racks (43) to move in a direction of approaching or moving away from each other, so that the racks (43) drive the moving rod (32) to move back and forth, the moving rod (32) drives the connecting rod (34) to move back and forth, the connecting rod (34) drives the moving seat (21) to move back and forth, so that the moving seat (21) drives the placement plate (22) to move back and forth to shake the building structure model; S3: The rotating shaft (4) drives the pulley 1 (62) to rotate forward and reversely, the pulley 1 (62) drives the transmission belt (64) to rotate forward and reversely, the transmission belt (64) drives the pulley 2 (63) to rotate forward and reversely, and the pulley 2 (63) drives the screw rod (61) to rotate forward and reversely, so that the screw rod (61) drives the slider (51) to drive the moving platform (11) to move back and forth along the axial direction of the screw rod (61), and the moving platform (11) drives the moving seat (21) and the placement plate (22) to move back and forth along the axial direction of the screw rod (61) to shake the building structure model.

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