Vibration table test limiting device
By using a bidirectional hydraulic damper as a limit energy dissipation part in the vibration table test, the problem of overturning the under-artificial mass model is solved, the horizontal displacement of the model and the reliability of the test data is achieved, and the accuracy of the seismic simulation test is ensured.
Patent Information
- Application Number
- CN202421025555.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-13
AI Technical Summary
In earthquake simulation vibration table test, due to the limited size and load-bearing capacity of the vibration table, the commonly used under-artificial mass model is prone to overturn when the seismic effect is applied, resulting in premature pulling of the model and the base, affecting the accuracy of the test data.
A vibration table test limit device is designed, using a bidirectional hydraulic damper as the limit energy dissipation member. Through the structure of the connecting seat and the hinge plate, the eccentric energy of the model is absorbed to prevent the occurrence of overturning.
Under small-seismic loading conditions, the model can balance the loading effect, and the seismic action increases the time limit of the energy-dissolving parts absorb adverse component forces, avoid model overturning, and ensure the reliability of the test data.
Smart Images
Figure CN222318376U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a vibration table, in particular to a vibration table test limit device, belonging to the technical field of building structure performance testing equipment. Background Art
[0002] The application of earthquake simulation vibration table in building structures mainly involves the seismic test research of large-span space building structures, high-rise structures, TV towers and other civil engineering structures. It is a way to detect and study the seismic performance of building structures by loading vibration waveforms (periodic waves, random waves, seismic waves, etc.).
[0003] Since the actual structure to be tested is relatively large in size and is limited by the size and bearing capacity of the shaking table, the prototype structure can be tested on a reduced scale according to the "Code for Seismic Test of Buildings" (JGJ / T101-2015). Commonly used similar models include artificial mass model, neglected gravity model and under-artificial mass model. Due to the limited size and bearing capacity of the shaking table, the full artificial mass model often exceeds the bearing limit of the shaking table and is difficult to implement in practice; the lack of vertical compressive stress in the neglected gravity model will lead to changes in the damage state of the component; therefore, most of them are carried out mainly using the under-artificial mass model. However, this method will cause the overturning effect of the model to be amplified when the earthquake is applied in the test. When this amplification reaches a certain degree, it will have a certain impact on the accuracy of the test data. Under the action of a large earthquake wave, the overturning force will increase accordingly, resulting in the premature separation of the bottom of the under-artificial mass model from the model base. Therefore, further improvement is needed. Utility Model Content
[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a vibration table test limit device to avoid the model from overturning, prevent the model from being separated from the base prematurely, and realize the horizontal displacement of the model.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A vibration table test limit device comprises a vibration table body, on which a plurality of first connection seats are arranged; an experimental model is located inside the first connection seats; a limit energy dissipation component is connected to the first connection seat; a second connection seat is connected to the other end of the limit energy dissipation component opposite to the first connection seat; and the second connection seat is arranged on the experimental model.
[0007] Furthermore, the bottom of the experimental model has a model base; the model base is arranged on the vibration table body; and the plurality of first connecting seats are arranged outside the model base.
[0008] Furthermore, the first connecting seat has a first fixed plate; a first hinged plate is arranged on the first fixed plate; the first fixed plate is fixed to the vibration table body by anchor bolts; the limiting energy dissipation component is a bidirectional hydraulic damper; the bidirectional hydraulic damper has an upper hydraulic rod and a lower hydraulic rod.
[0009] Furthermore, the lower hydraulic rod is connected to both sides of the first hinged plate through a hinge joint; the second connecting seat has a second fixed plate and a second hinged plate; the upper hydraulic rod is connected to both sides of the second hinged plate through a hinge joint; the inner sides of the first hinged plate and the second hinged plate are both chamfered.
[0010] Furthermore, the second fixing plate is connected to a structural column of the frame structure test model.
[0011] Furthermore, a fence is provided on the outside of the masonry or shear wall test model; and the second fixing plate is connected to the fence.
[0012] The utility model has the following beneficial effects: under small earthquake loading conditions, the mass of the model itself can balance the adverse upward force of the loading effect, and the horizontal displacement of the model can be realized normally; once the earthquake effect increases, the limiting and energy-dissipating parts start to work according to the adverse upward force predicted by calculation, so that the model will not overturn.
[0013] In the above manner, the adverse additional overturning effect is deduced in advance, and finally the energy is converted and absorbed by the limiting energy dissipation parts, making the test data reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model.
[0015] Figure 2 It is a structural schematic diagram of another embodiment of the utility model.
[0016] Figure 3 It is a schematic diagram of the side structure of the vibration table body.
[0017] Figure 4 It is a structural schematic diagram of the limiting energy dissipation component.
[0018] In the figure: 1 is the vibration table body, 2 is the first connecting seat, 21 is the first fixed plate, 22 is the first hinged plate, 3 is the experimental model, 31 is the model base, 4 is the second connecting seat, 41 is the second fixed plate, 42 is the second hinged plate, 5 is the limiting energy dissipation member, 51 is the upper hydraulic rod, and 52 is the lower hydraulic rod. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] The terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art, unless the terms are defined differently. It should be understood that the terms defined in commonly used dictionaries have the same meaning as those in the prior art.
[0021] See also Figure 1-Figure 4
[0022] A vibration table test limit device includes a vibration table body 1, on which a plurality of first connecting seats 2 are arranged; an experimental model 3 is located inside the first connecting seat 2; a limit energy dissipation component 5 is connected to the first connecting seat 2; the other end of the limit energy dissipation component 5 relative to the first connecting seat 2 is connected to a second connecting seat 4; and the second connecting seat 4 is arranged on the experimental model 3.
[0023] Furthermore, the experimental model 3 has a model base 31 at the bottom; the model base 31 is arranged on the vibration table body 1 ; and a plurality of the first connecting seats 2 are arranged outside the model base 31 .
[0024] Furthermore, the first connecting seat 2 has a first fixed plate 21; a first hinged plate 22 is arranged on the first fixed plate 21; the first fixed plate 21 is fixed to the vibration table body 1 by anchor bolts; the limiting energy dissipation component 5 is a bidirectional hydraulic damper; the bidirectional hydraulic damper has an upper hydraulic rod 51 and a lower hydraulic rod 52.
[0025] Furthermore, the lower hydraulic rod 52 is connected to both sides of the first hinge plate 21 through a hinge joint; the second connecting seat 4 has a second fixed plate 41 and a second hinge plate 42; the upper hydraulic rod 51 is connected to both sides of the second hinge plate 42 through a hinge joint; the inner sides of the first hinge plate 22 and the second hinge plate 42 are both chamfered.
[0026] Furthermore, the second fixing plate 41 is connected to the structural column of the frame structure test model.
[0027] See also Figure 1The experimental model 3 targeted by this embodiment is an experimental model of a frame structure; the second fixing plate 41 is connected to the beam column of the frame structure test model 3; when the earthquake action increases, the upper hydraulic rod 51 and the lower hydraulic rod 52 can absorb the energy of the deflection of the experimental model 3 to prevent it from overturning.
[0028] Furthermore, a fence is provided on the outside of the masonry or shear wall test model; and the second fixing plate 41 is connected to the fence.
[0029] See also Figure 2 The experimental model 3 of this embodiment is a masonry or shear wall. It is only necessary to install a circle of enclosure on the outside of the experimental model 3 to connect with the second fixing plate 41 of the limiting energy dissipation member 5.
[0030] When the experimental model 3 deflects, the upper hydraulic rod 51 and the lower hydraulic rod 52 will be compressed. Since the upper hydraulic rod 51 and the lower hydraulic rod 52 are respectively hinged to the first hinge plate 21 and the second hinge plate 42 , they can adapt to the angle change of the experimental model 3 .
[0031] When designing the limiting energy dissipation member 5
[0032] First, according to the requirements of the Code for Seismic Test of Buildings (JGJ / T101-2015), the similarity between the test model and the actual model and the difference in quality are calculated according to the plan made by this model (minus the quality of artificial materials):
[0033] By applying the seismic action under each working condition, the adverse upward force component is calculated respectively, so as to determine the number of the limiting energy dissipation parts 5 that need to be set under each working condition.
[0034] After the number of limiting and energy-dissipating parts 5 is determined, they are arranged around the model, and then the specifications of the first connecting seat 2 and the second connecting seat 4 are determined according to the force applied to each limiting and energy-dissipating part 5 (to prevent motion interference between the upper hydraulic rod 51, the lower hydraulic rod 52 and the first hinge plate 21 and the second hinge plate 41 due to the large swing amplitude of the experimental model 3).
[0035] Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the utility model rather than limiting it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A vibration table test limit device, comprising a vibration table body, characterized in that: The vibration table body is provided with a plurality of first connection seats; the experimental model is located inside the first connection seats; the first connection seats are connected with a limited energy dissipation member; the other end of the limited energy dissipation member relative to the first connection seat is connected with a second connection seat; the second connection seat is arranged on the experimental model.
2. A vibration table test limit device according to claim 1, characterized in that: The bottom of the experimental model is provided with a model base; the model base is arranged on the vibration table body; and a plurality of first connecting seats are arranged outside the model base.
3. A vibration table test limit device according to claim 2, characterized in that: The first connecting seat has a first fixing plate; the first fixing plate is provided with a first hinged plate; the first fixing plate is fixed to the vibration table body by anchor bolts; the limiting energy dissipation component is a bidirectional hydraulic damper; the bidirectional hydraulic damper has an upper hydraulic rod and a lower hydraulic rod.
4. A vibration table test limit device according to claim 3, characterized in that: The lower hydraulic rod is connected to both sides of the first hinged plate through a hinge joint; the second connecting seat has a second fixed plate and a second hinged plate; the upper hydraulic rod is connected to both sides of the second hinged plate through a hinge joint; the inner sides of the first hinged plate and the second hinged plate are both chamfered.
5. A vibration table test limit device according to claim 4, characterized in that: The second fixing plate is connected to the structural column of the frame structure test model.
6. A vibration table test limit device according to claim 5, characterized in that: The outer side of the frame structure experimental model is provided with a fence; the second fixing plate is connected to the fence.