Anti-seismic test device of building structure frame

Abstract

The utility model relates to the field of building production, in particular to an anti-seismic test device for a building structure framework, which comprises a first mounting seat, two second mounting seats are slidably connected onto the first mounting seat, two first mounting plates are arranged on the upper sides of the front and rear parts of the first mounting seat, and two first dampers are mounted on each first mounting plate. The first dampers are connected with the adjacent second mounting bases, first springs are arranged between the second mounting bases and the corresponding first dampers, the two second dampers are arranged on the upper portions of the second mounting bases, and vibrators are arranged between the adjacent second dampers. Based on a self-adaptive clamping system of the two-way screw rod and the rubber pad, when earthquake energy is precisely conducted, stress concentration is eliminated, the vibration freedom degree is given to a test piece, frequency spectrum energy phagocytosis from high-frequency vibration to main body seismic waves is achieved by means of gradient energy dissipation topology between the spring and the damper, and the vibration energy dissipation precision of the test piece is improved. And the reproduction precision of the seismic waves is increased to a simulation level.

Description

Technical Field

[0001] This utility model relates to the field of building production, and in particular to a seismic testing device for building structural frames. Background Technology

[0002] Traditional seismic tests of building structures generally employ unidirectional loading or static pushover devices, which are difficult to accurately simulate the multi-dimensional dynamic coupling effects of earthquakes. While existing shaking table equipment can reproduce seismic waves, it has significant limitations: fixed clamps are prone to stress concentration damage to specimens during strong vibrations; the integral table surface cannot perform detailed monitoring of local frame responses; more critically, there is a lack of rapid mechanical braking mechanisms in the event of sudden structural failure during the test, relying solely on sensor feedback to cut off the power supply, which carries the risk of protection delays; at the same time, ordinary damping systems are mostly rigid connections, which are insufficient in filtering high-frequency residual vibrations, affecting the signal-to-noise ratio of the data; the specimen installation process often requires multiple rounds of centering adjustments, which is inefficient; and the lack of a gradient dissipation mechanism for vibration energy transfer makes the equipment susceptible to resonance damage.

[0003] Therefore, in order to address the above problems, a seismic testing device for building structural frames is now being developed. Utility Model Content

[0004] In order to overcome the shortcomings of existing devices, this utility model provides a seismic testing device for building structural frames.

[0005] The technical implementation scheme of this utility model is as follows: a seismic testing device for a building structural frame, comprising a first mounting base, two second mounting bases slidably connected to the first mounting base, two first mounting plates on the upper sides of both the front and rear of the first mounting base, two first dampers mounted on each first mounting plate, each first damper connected to an adjacent second mounting base, a first spring between each second mounting base and its corresponding first damper, two second dampers on the upper part of each second mounting base, a vibrator between adjacent second dampers, guide grooves on the upper sides of both the left and right sides of the first mounting base, second mounting plates slidably connected between the guide grooves, the second mounting plates connected to the vibrators by bolts, multiple reserved holes on the second mounting plates, third dampers on both the left and right sides of the second mounting plates, third springs connected between the third dampers and the first mounting bases, and a clamping mechanism slidably mounted on the second mounting plates for clamping and limiting the building structural frame.

[0006] Furthermore, the clamping mechanism includes a third mounting plate, and two third mounting plates symmetrically arranged on the front and rear sides of the second mounting plate. A guide rod is arranged between the third mounting plates on the left side, and a bidirectional lead screw is rotatably connected between the third mounting plates on the right side. Two clamping plates symmetrically arranged on the upper side of the second mounting plate are slidably connected. The clamping plates are slidably connected to the guide rod and threadedly connected to the bidirectional lead screw.

[0007] Furthermore, it also includes a locking mechanism, which includes mounting components. Two mounting components are symmetrically arranged on the upper sides of the front and rear parts of the first mounting base. Each mounting component is rotatably connected to a locking component. The locking component can be flipped upward to lock and fix the first damper.

[0008] Furthermore, the bidirectional lead screw has a handle on its front side.

[0009] Furthermore, rubber pads are provided on the inner side of each clamping plate.

[0010] Furthermore, each of the locking components has an arc-shaped groove, which can engage with the first damper.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0012] This invention is based on an adaptive clamping system using a bidirectional lead screw and rubber pad. While precisely transmitting seismic energy, it eliminates stress concentration, gives the specimen a degree of freedom of vibration, and relies on the gradient energy dissipation topology between the spring and the damper to achieve spectral energy absorption from high-frequency flutter to the main seismic wave, thereby increasing the accuracy of seismic wave reproduction to the simulation level. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the anti-section of this utility model.

[0015] Figure 3 This is a schematic diagram of the partially exploded three-dimensional structure of this utility model.

[0016] Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the clamping mechanism of this utility model.

[0017] Figure 5 This is a three-dimensional structural diagram of the locking mechanism of this utility model.

[0018] In the above attached figures: 1: First mounting base, 2: Second mounting base, 3: First damper, 4: First spring, 5: First mounting plate, 6: Vibrator, 7: Second damper, 8: Second spring, 9: Second mounting plate, 10: Reserved hole, 11: Third damper, 12: Third spring, 13: Clamping mechanism, 131: Third mounting plate, 132: Clamping plate, 133: Rubber pad, 134: Two-way lead screw, 135: Guide rod, 14: Locking mechanism, 141: Mounting part, 142: Locking part, 143: Arc groove. Detailed Implementation

[0019] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] A seismic testing device for building structural frames, such as Figures 1-5 As shown, the structure includes a first mounting base 1, with two second mounting bases 2 slidably connected to the first mounting base 1. Two first mounting plates 5 are provided on the upper sides of both the front and rear parts of the first mounting base 1. Two first dampers 3 are mounted on each of the first mounting plates 5, and each first damper 3 is connected to an adjacent second mounting base 2. A first spring 4 is provided between each second mounting base 2 and its corresponding first damper 3. Two second dampers 7 are provided on the upper part of each second mounting base 2, and a vibrator 6 is provided between adjacent second dampers 7. Guide grooves are provided on the upper sides of both the left and right parts of the first mounting base 1, and second mounting plates 9 are slidably connected between the guide grooves. The second mounting plates 9 are connected to the vibrators 6 by bolts. Multiple pre-drilled holes 10 are provided on the second mounting plates 9. Third dampers 11 are provided on both the left and right sides of the second mounting plates 9, and third springs 12 are connected between the third dampers 11 and the first mounting base 1. A clamping mechanism 13 is slidably provided on the second mounting plates 9, and the clamping mechanism 13 is used to clamp and limit the building structure frame.

[0021] The clamping mechanism 13 includes a third mounting plate 131. Two third mounting plates 131 are symmetrically arranged on the front and rear sides of the second mounting plate 9. A guide rod 135 is arranged between the third mounting plates 131 on the left side. A bidirectional lead screw 134 is rotatably connected between the third mounting plates 131 on the right side. The bidirectional lead screw 134 has a handle on the front side. Two clamping plates 132 are symmetrically arranged on the upper side of the second mounting plate 9. The clamping plates 132 are slidably connected to the guide rod 135 and threadedly connected to the bidirectional lead screw 134. Rubber pads 133 are arranged on the inner side of the clamping plates 132.

[0022] It also includes a locking mechanism 14, which includes a mounting component 141. Two mounting components 141 are symmetrically arranged on the upper sides of the front and rear parts of the first mounting base 1. Each mounting component 141 is rotatably connected to a locking component 142. The locking component 142 can be locked and fixed by flipping upward. Each locking component 142 has an arc groove 143, which can engage with the first damper 3.

[0023] It should be noted that this seismic testing device for building structural frames is based on a graded energy dissipation and dynamic control mechanism to comprehensively simulate the dynamic response process of building structures under seismic loads. The operation begins with the precise positioning and fixing of the specimen: the operator places the frame specimen to be tested on the upper surface of the second mounting plate 9, and drives the clamping plates 132 on both sides to move precisely along the guide rod 135 by rotating the bidirectional lead screw 134 in the clamping mechanism 13. The strong friction characteristics and elastic deformation of the rubber pads 133 on the inner side of the clamping plates 132 are used to achieve flexible constraint on the specimen—avoiding rigid contact damage to the specimen surface, and strictly limiting the specimen through multi-directional frictional torque. The spatial displacement degrees of freedom of the specimen establish a solid foundation for subsequent vibration transmission. Then, the vibrator 6, positioned between the second dampers 7, is activated, generating horizontal seismic waveforms covering low, medium, and high frequency bands. The vibration energy is rigidly transmitted to the second mounting plate 9 via high-strength bolts, driving the entire specimen system to slide laterally along the specially treated guide groove on the surface of the first mounting base 1, replicating the structural translational effect under seismic action. During vibration transmission, the device's three-stage energy dissipation system dissipates energy layer by layer: the springs and damping elements located on both sides of the second mounting plate 9 respond first, with the spring assembly buffering the initial impact through elastic energy storage, and the dampers counteracting the plate's return motion. By applying nonlinear viscous resistance, interference from high-frequency residual vibrations on the main vibration waveform is effectively filtered out. Simultaneously, the vertical vibration component generated by the vibrator 6 itself is instantly absorbed by the second damper 7, ensuring the purity of horizontal vibration while suppressing harmful vertical flutter. The main vibration energy is further transmitted to the foundation connection structure. The core energy dissipation unit formed between the second mounting base 2 and the first mounting base 1 plays a crucial role. When the input vibration energy is within the normal threshold, the multi-stage spring assembly smooths the vibration response curve through alternating expansion and contraction. When encountering extreme conditions simulating strong earthquakes, the viscous fluid within the first damper 3 rapidly dissipates kinetic energy due to intense shearing. This generates a significant thermal energy conversion effect. Simultaneously, the controllable sliding of the second mounting base 2 within a preset stroke range accurately reproduces the critical inter-story drift angle of the building structure. If specimen cracking occurs during the test or static load testing is required, the locking mechanism 14 can respond quickly: flipping the locking part 142 upwards so that its specially designed arc groove 143 forms an interference fit with the damper outer cylinder, instantly freezing the motion state of all sliding parts through purely mechanical hard limiting, constructing a physical melting mechanism for the vibration transmission chain. Throughout the test cycle, the frequency spectrum, amplitude characteristics, and duration of the vibrator 6 are programmed to accurately simulate the entire working environment from daily micro-vibrations to rare strong earthquakes. The array of pre-reserved wiring holes on the surface of the second mounting plate 9 supports the unimpeded installation of various sensors, enabling simultaneous acquisition of dynamic strain distribution, displacement development trends, and acceleration responses at key parts of the specimen. The adjustable stroke design of the clamping mechanism 13, adaptable to different frame sizes, and the millisecond-level response capability of the locking mechanism 14 together form a test safety redundancy, ensuring that energy transfer can be instantly interrupted even in the extreme state of component failure.

[0024] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A seismic testing device for a building structural frame, characterized in that: It includes a first mounting base (1), on which two second mounting bases (2) are slidably connected. Two first mounting plates (5) are provided on the upper sides of both the front and rear of the first mounting base (1). Two first dampers (3) are mounted on each of the first mounting plates (5). Each first damper (3) is connected to an adjacent second mounting base (2). A first spring (4) is provided between each second mounting base (2) and its corresponding first damper (3). Two second dampers (7) are provided on the upper part of each second mounting base (2). A vibrator is provided between adjacent second dampers (7). 6) The first mounting base (1) has guide grooves on both the left and right sides. A second mounting plate (9) is slidably connected between the guide grooves. The second mounting plate (9) is connected to the vibrator (6) by bolts. The second mounting plate (9) has multiple reserved holes (10). A third damper (11) is provided on both the left and right sides of the second mounting plate (9). A third spring (12) is connected between the third damper (11) and the first mounting base (1). A clamping mechanism (13) is slidably provided on the second mounting plate (9). The clamping mechanism (13) is used to clamp and limit the building structure frame.

2. The seismic testing device for a building structural frame according to claim 1, characterized in that: The clamping mechanism (13) includes a third mounting plate (131). Two third mounting plates (131) are symmetrically arranged on the front and rear sides of the second mounting plate (9). A guide rod (135) is arranged between the third mounting plates (131) on the left side. A bidirectional screw rod (134) is rotatably connected between the third mounting plates (131) on the right side. Two clamping plates (132) are symmetrically connected to the upper side of the second mounting plate (9). The clamping plates (132) are slidably connected to the guide rod (135) and threadedly connected to the bidirectional screw rod (134).

3. The seismic testing device for a building structural frame according to claim 2, characterized in that: It also includes a locking mechanism (14), which includes a mounting component (141). The first mounting base (1) has two mounting components (141) symmetrically arranged on the upper sides of the front and rear parts. Each mounting component (141) is rotatably connected to a locking component (142). The locking component (142) can be locked and fixed by flipping upward.

4. The seismic testing device for a building structural frame according to claim 2, characterized in that: The bidirectional lead screw (134) has a handle on its front side.

5. A seismic testing device for a building structural frame according to claim 2, characterized in that: Rubber pads (133) are provided on the inner side of each clamping plate (132).

6. A seismic testing device for a building structural frame according to claim 3, characterized in that: Each locking member (142) has an arc-shaped groove (143) which can engage with the first damper (3).

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