A method and system for impact load simulation test of beam-column joints

Abstract

The application provides a kind of impact load simulation test method and system for beam-column joint, and relates to the technical field of building structure impact resistance test.The method comprises the following steps: installing the test piece between the upper and lower hinge supports of the impact load simulation test device, controlling the load between the upper and lower hinge supports by controlling the oil intake of the oil pump, and monitoring the axial force value through the force sensor; when the load reaches the preset load, keep the oil pressure to keep the axial force vertical and stable to clamp the test piece; determine the impact position of the test piece, set the predetermined impact energy for the impact device, and impact the impact position of the test piece through the impact device; in the impact process, the axial force value of the force sensor is obtained, and the impact resistance performance score of the test piece is determined according to the axial force value.The quantitative characterization of the impact resistance of the beam-column joint under complex stress conditions is realized, the stress state of the test piece under actual working conditions can be more comprehensively simulated, and the authenticity of the impact test results is improved.

Description

Technical Field

[0001] This invention relates to the field of impact resistance testing technology for building structures, and in particular to a method and system for simulating impact loads on beam-column joints. Background Technology

[0002] In related technologies, building structures, in addition to bearing conventional static loads during service, may also be subjected to accidental impacts such as collisions and floor falls, which can lead to the failure of local components or even structural collapse. Before being subjected to accidental loads such as collisions or earthquakes, building structures are usually already bearing their own weight and the loads transferred from the superstructure, and are in a loaded working state. However, existing test equipment is mainly for beam and column members under simply supported or fixed boundary conditions, and there is a lack of test equipment and test methods for simulating the axial force loading at the column end when the beam end of the beam is subjected to impact.

[0003] The information disclosed in the background section of this application is intended only to enhance the understanding of the general background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] This invention provides a method for simulating impact loads on beam-column joints, which can solve the problem in the prior art that it is difficult to simulate the actual stress of beam-column joints under load and to evaluate their impact resistance performance.

[0005] According to a first aspect of the present invention, a method for simulating impact loads on beam-column joints is provided, comprising:

[0006] The specimen was installed between the upper and lower hinge supports of the impact load simulation test device;

[0007] By controlling the oil pump's oil inlet flow, the load between the upper and lower hinge supports is controlled, and the axial force value is monitored by a force sensor. When the preset load is applied, the oil pressure is maintained so that the axial force remains vertical and stable, thereby clamping the specimen.

[0008] Determine the impact location of the specimen, set a predetermined impact energy for the impact device, and impact the impact location of the specimen through the impact device;

[0009] During the impact process, the axial force value of the force sensor is obtained, and the impact resistance performance score of the specimen is determined based on the axial force value.

[0010] According to the present invention, if the specimen is damaged, the impact resistance score is determined based on the axial force value at each impact and the length of the clamping plate, including: according to the formula Determine the impact resistance score S, where, Let be the axial force value at the i-th impact. Let n be the length of the clamping plate, and n be the number of impacts. It is designed to withstand a predetermined amount of energy.

[0011] According to a second aspect of the present invention, an impact load simulation test system for beam-column joints is provided, comprising:

[0012] Upper and lower hinged supports, oil pump, rigid foundation platform, force sensor, steel columns and I-beams;

[0013] The steel column is equipped with multiple bolt holes, and the I-beam is installed on the web of the steel column. Different installation heights can be achieved by changing the position of the bolt holes.

[0014] The steel columns are fixed to a rigid foundation platform;

[0015] Force sensors are installed on the upper part of the upper and lower hinge supports. The central axes of the upper and lower hinge supports coincide and rotate at the inflection point when subjected to impact load.

[0016] The upper and lower hinged support brackets clamp the specimen, and the applied load value is controlled by controlling the oil inlet flow of the oil pump, and the specimen can be clamped tightly.

[0017] According to the present invention, the upper and lower hinge support includes an upper hinge part, a roller and a lower hinge part, and the lower hinge part is provided with a clamping plate. The clamping plate of the lower hinge part of the upper and lower hinge support is used to clamp the specimen.

[0018] According to the present invention, the upper and lower hinge supports are on the same plane and maintain the same rotation under impact load.

[0019] According to the present invention, the vertical axes of the oil pump, the force sensor, and the upper and lower hinge supports coincide.

[0020] According to the present invention, the steel column is fixed to the rigid foundation platform by anchor bolts passing through the reserved holes at the column base, and the I-beam, ground beam, and steel column base are reinforced with stiffening ribs, and the steel column is reinforced with stiffening ribs.

[0021] According to this invention, by pre-applying axial load, setting the impact position and predetermined impact energy, and recording axial force values ​​during repeated impacts, an impact performance scoring mechanism is constructed, enabling quantitative characterization of the impact resistance of beam-column joints under complex stress conditions. This allows for a more comprehensive simulation of the stress state of the specimen under actual working conditions, improving the realism of the impact test results and the uniformity and repeatability of evaluation results across different working conditions. By setting an adjustable-height support frame, upper and lower hinged supports with clamping structures, an oil pump and force sensor coaxially arranged with the loading center path, and anchoring and stiffening structures connected to a rigid foundation platform, impact test support under stable clamping conditions is achieved for the specimen. This allows for a more accurate construction of the stress environment of the beam-column joint under actual working conditions, improving the realism of boundary simulation, the reliability of load transfer, the accuracy of measurement results, and the overall stability of the entire impact test system.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Other features and aspects of the invention will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0024] Figure 1 An exemplary flowchart of an impact load simulation test method for beam-column joints according to an embodiment of the present invention is shown.

[0025] Figure 2 An exemplary front view of an impact load simulation test system for beam-column joints according to an embodiment of the present invention is shown;

[0026] Figure 3 A side view of an impact load simulation test system for beam-column joints according to an embodiment of the present invention is shown as an example.

[0027] Figure 4 A schematic diagram of the upper and lower hinge support according to an embodiment of the present invention is shown as an example;

[0028] Figure 5 An exemplary schematic diagram of the connection section between the I-beam and the web of the steel column according to an embodiment of the present invention is shown;

[0029] Figure 6An exemplary schematic diagram of fixing an oil pump to the upper and lower steel plates of an I-beam is shown in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the reserved hole positions in an embodiment of the present invention is shown as an example;

[0031] Figure 8 A schematic diagram of an anchor bolt according to an embodiment of the present invention is shown as an example;

[0032] Reference numerals: 1-Steel column; 2-I-beam; 3-Oil pump; 4-Steel plate for fixing force sensor; 5-Force sensor; 6-Upper hinge; 7-Roller; 8-Lower hinge; 9-Column base steel plate; 10-Ground beam; 11-Stiffening rib; 12-Reserved hole; 13-Bolt hole; 14-Stiffening rib; 15-Upper steel plate; 16-Oil pump fixing bolt rod with bolt; 17-Lower steel plate; 18-Force sensor fixing bolt rod and nut; 19-Specimen; 20-Impact device hammer head schematic; 21-Anchor bolt; 22-Rigid foundation platform. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0035] Figure 1 An exemplary flowchart illustrates a method for simulating impact loads on beam-column joints according to an embodiment of the present invention, the method comprising:

[0036] Step S1: Install specimen 19 between the upper and lower hinge supports of the impact load simulation test device;

[0037] Step S2: By controlling the oil flow rate of the oil pump 3, the load between the upper and lower hinge supports is controlled, and the axial force value is monitored by the force sensor 5. When the preset load is applied, the oil pressure is maintained so that the axial force remains vertical and stable, thereby clamping the specimen 19.

[0038] Step S3: Determine the impact position of the specimen 19, set a predetermined impact energy for the impact device 20, and impact the impact position of the specimen 19 through the impact device 20.

[0039] Step S4: During the impact process, the axial force value of the force sensor 5 is obtained, and the impact resistance performance score of the specimen 19 is determined based on the axial force value.

[0040] An impact load simulation test method for beam-column joints according to an embodiment of the present invention involves adjusting the height of the I-beam and the steel column through bolt holes, clamping the specimen using an oil pump and upper and lower hinged supports, and impacting the specimen at the impact position using an impact device. During the impact process, the axial force value of the force sensor is acquired, and the impact resistance performance score of the specimen is determined based on the axial force value. This method achieves a quantitative characterization of the impact resistance of beam-column joints under complex stress conditions, more comprehensively simulates the stress state of the specimen under actual working conditions, improves the authenticity of the impact test results, and enhances the uniformity and repeatability of evaluation results across different working conditions.

[0041] According to an embodiment of the present invention, in step S1, the specimen 19 is a beam-column joint specimen. The specimen 19 is installed between the upper and lower hinge supports of the impact load simulation test device. The upper and lower hinge supports are respectively set at the upper and lower connection parts of the specimen column and are composed of the upper hinge 6, the roller 7 and the lower hinge 8. They are used to simulate the rotational constraint state exhibited by the column near the inflection point in the real structure when the beam end is impacted.

[0042] According to an embodiment of the present invention, in step S2, the load between the upper and lower hinge supports is controlled by controlling the oil inlet flow of the oil pump 3, and the axial force value is monitored by the force sensor 5. When the preset load is applied, the oil pressure is maintained so that the axial force remains vertically stable to clamp the specimen 19. That is, before the impact begins, the vertical pressure is applied to the specimen by adjusting the hydraulic input of the oil pump, and the pressure value is monitored in real time by the force sensor. When the pressure reaches the predetermined value, the oil pressure is kept constant so that the specimen 19 is in a stable state, providing initial force conditions for subsequent impact load simulation tests. The force sensor can be a tension-compression force sensor or an axial force sensor, and the present invention does not limit this.

[0043] According to an embodiment of the present invention, in step S3, the impact position of the specimen 19 is determined, and a predetermined impact energy is set for the impact device 20. The impact device 20 then impacts the impact position of the specimen 19. That is, when the specimen is under a preset axial force state, the designated impact position of the specimen 19 and the predetermined impact energy of the impact device 20 are determined. Subsequently, the impact device releases the impact body to impact the designated impact position at the beam end of the specimen. The preset impact energy determines the impact effect on the specimen after the impact body is released. The impact body can be a hammer or a striking part, etc.

[0044] According to an embodiment of the present invention, in step S4, during the impact process, the axial force value of the force sensor 5 is acquired, and the impact resistance performance score of the specimen 19 is determined based on the axial force value, including: determining the length of the clamping plate of the upper and lower hinge supports used to clamp the specimen 19; and determining the impact resistance performance of the specimen 19 based on the length of the clamping plate and the axial force value.

[0045] According to an embodiment of the present invention, the upper and lower hinge supports clamp the specimen 19 by means of a clamping plate. The length of the clamping plate is used to limit the contact range and clamping conditions between the specimen and the upper and lower hinge supports. The axial force value is used to reflect the compressive stress state of the specimen before and during the impact. Therefore, the impact resistance performance of the specimen 19 can be determined by combining the clamping plate length and the axial force value.

[0046] According to an embodiment of the present invention, the impact resistance score of the specimen 19 is determined based on the length of the clamping plate and the axial force value, including: repeatedly impacting the specimen 19 at multiple impact locations using various predetermined impact energies, and recording the axial force value at each impact; after completing a preset number of impacts, if the specimen 19 is not damaged, the impact resistance score is set to 1; if the specimen 19 is damaged, the impact resistance score is determined based on the axial force value at each impact and the length of the clamping plate.

[0047] According to an embodiment of the present invention, the specimen 19 is repeatedly impacted at multiple impact locations using various predetermined impact energies, thereby more comprehensively evaluating the impact resistance performance of the specimen under different impact conditions, and recording the axial force value at each impact. After completing a preset number of impacts, if the specimen remains intact and does not break or lose its load-bearing capacity, it is considered to have met the predetermined impact resistance requirements, and the impact resistance performance score is set to 1. If the specimen is damaged, the impact resistance performance score is determined by combining the axial force value at each impact and the length of the clamping plate.

[0048] According to an embodiment of the present invention, if specimen 19 is damaged, an impact resistance score is determined based on the axial force value at each impact and the length of the clamping plate, including: determining the impact resistance score S according to formula (1).

[0049] (1)

[0050] in, Let be the axial force value at the i-th impact. Let n be the length of the clamping plate, and n be the number of impacts. It is designed to withstand a predetermined amount of energy.

[0051] According to an embodiment of the present invention, after completing a preset number of impacts, the axial force value under each impact condition is recorded. If the specimen 19 is damaged, the length of the clamping plate is considered. With preset energy tolerance The impact resistance performance score is determined as shown in formula (1). The upper and lower hinge supports hold the specimen through clamping plates, and the force sensor is located on the central force transmission path. The overall force is considered symmetrically on both sides of the centerline. Therefore, the total length of the clamping plates can be converted into the effective clamping length on one side. , This represents the total axial force response experienced by specimen 19 after completing the preset number of impacts, based on the preset energy tolerance. As a baseline normalization, the impact performance score is obtained. Used to characterize the overall impact resistance of specimen 19. The larger the value, the stronger the specimen's load-bearing and resistance to impact; conversely, the smaller the value, the weaker the value. The smaller the size, the relatively poorer the impact resistance.

[0052] By pre-applying axial loads, setting impact locations and predetermined impact energies, and recording axial force values ​​during repeated impacts, an impact performance scoring mechanism is constructed, enabling quantitative characterization of the impact resistance of beam-column joints under complex stress conditions. This method can more comprehensively simulate the stress state of specimens under actual working conditions, improving the authenticity of impact test results and the uniformity and repeatability of evaluation results across different working conditions.

[0053] Figure 2 A front view of an impact load simulation test system for beam-column joints according to an embodiment of the present invention is shown as an example.

[0054] Figure 3 A side view of an impact load simulation test system for beam-column joints according to an embodiment of the present invention is shown as an example.

[0055] Figure 4 A schematic diagram of the upper and lower hinge support according to an embodiment of the present invention is shown as an example.

[0056] Figure 5 An exemplary schematic diagram of the cross-section connecting the I-beam 2 and the web of the steel column 1 according to an embodiment of the present invention is shown.

[0057] Figure 6 A schematic diagram of fixing the oil pump 3 to the upper steel plate 15 and lower steel plate 17 of the I-beam 2 is shown as an example of an embodiment of the present invention.

[0058] Figure 7 A schematic diagram of the reserved hole position 12 in an embodiment of the present invention is shown as an example.

[0059] Figure 8 A schematic diagram of the anchor bolt 21 according to an embodiment of the present invention is shown as an example.

[0060] According to an embodiment of the present invention, the system includes: upper and lower hinge supports, an oil pump 3, a rigid foundation platform 22, a force sensor 5, a steel column 1, and an I-beam 2; wherein, the steel column 1 is provided with multiple bolt holes 13, and the I-beam 2 is installed on the web of the steel column 1, and different installation heights can be achieved by changing the position of the mounting bolt holes 13; the steel column 1 is fixed on the rigid foundation platform 22; the upper part of the upper and lower hinge supports is provided with a force sensor 5, the central axes of the upper and lower hinge supports coincide, and they rotate at the inflection point when subjected to impact load; the upper and lower hinge support brackets clamp the specimen 19, and the applied load value is controlled by controlling the oil inlet of the oil pump 3, and the specimen 19 can be clamped tightly.

[0061] According to an embodiment of the present invention, the I-beam 2 is installed at the web of the steel column 1 via bolt holes 13 (e.g., with a diameter of 28 mm). Figure 5 As shown, the web is a 200mm×160mm×10mm steel plate, and the installation height can be changed by replacing bolt holes 13. Serving as the mounting base for the oil pump 3 and related loading components, the steel column 1 is fixed to the rigid foundation platform 22 to provide vertical support. The oil pump 3 is fixed to the I-beam 2 via the upper steel plate 15, lower steel plate 17, and fixing bolt rods with bolts 16 (e.g., ...). Figure 6 As shown, both the upper and lower steel plates are 400mm×400mm×10mm steel plates. The oil pump 3 applies axial load by adjusting the oil inlet flow. The force sensor 5 is set on the upper part of the upper and lower hinge supports and connected to the dynamic acquisition instrument (e.g., DH5960). The force sensor is fixed below the oil pump 3 by the steel plate 4 for fixing the force sensor, the force sensor fixing bolt rod and the nut 18. The force sensor 5 is used to monitor the axial force value in real time. The upper and lower hinge supports are used to transfer the axial load to the specimen 19 and at the same time provide rotatable boundary conditions.

[0062] According to an embodiment of the present invention, the upper and lower hinge supports include an upper hinge portion 6, a roller 7, and a lower hinge portion 8 (e.g., ...). Figure 4 As shown), a clamping plate is provided in the lower hinge part 8, and the clamping plate of the lower hinge part 8 of the upper and lower hinge supports is used to clamp the specimen 19.

[0063] According to an embodiment of the present invention, the roller 7 is disposed between the upper hinge portion 6 and the lower hinge portion 8, enabling the upper and lower hinge supports to rotate under impact load, thereby simulating the rotational boundary conditions of the specimen column end near the inflection point. The lower hinge portion 8 is provided with a clamping plate, which is used to clamp the end of the specimen 19, ensuring stable installation of the specimen and reliable transmission of axial force values.

[0064] According to an embodiment of the present invention, the upper and lower hinge supports are on the same plane and maintain the same rotation under impact load.

[0065] According to an embodiment of the present invention, the upper and lower hinge supports are arranged in the same plane, which enables the specimen to form a consistent rotational constraint at the upper and lower ends under impact load, thereby more realistically simulating the rotational boundary conditions of the beam-column joint under actual impact conditions and improving the accuracy of the test results.

[0066] According to an embodiment of the present invention, the vertical axes of the oil pump 3, the force sensor 5, and the upper and lower hinge supports coincide.

[0067] According to an embodiment of the present invention, the vertical axes of the oil pump 3, the force sensor 5, and the upper and lower hinge supports coincide. With this arrangement, the axial load applied by the oil pump 3 can be stably transmitted to the end of the specimen 19 along the same straight line via the force sensor 5 and the upper and lower hinge supports. Simultaneously, the force sensor 5 can more accurately obtain the axial force value of the specimen 19 during the impact process along the force transmission path, thereby ensuring the reliability of the force measurement results during the test.

[0068] According to an embodiment of the present invention, the steel column 1 is characterized by being secured by anchor bolts 21 (such as...). Figure 8 (As shown) Passing through the pre-drilled hole 12 at the column base (as shown) Figure 7 As shown, the steel beam 2, the ground beam 10, and the steel column base are fixed on the rigid foundation platform 22, and the steel beam 2, the ground beam 10, and the steel column base are reinforced with stiffening ribs 11, while the steel column 1 is reinforced with stiffening ribs 14.

[0069] According to an embodiment of the present invention, the steel column 1 is fixed to the rigid foundation platform 22 by anchor bolts 21 passing through the pre-drilled holes 12 at the column base, to ensure sufficient overall stability of the test system under impact conditions. Furthermore, the I-beam 2, the ground beam 10, the steel column base, and the steel column 1 are reinforced by stiffening ribs 11 and 14 respectively to improve the load-bearing capacity of each connection and main load-bearing component. Through the above-mentioned reinforcement structure arrangement, the deformation resistance and stress stability of the test system under repeated impact conditions can be effectively enhanced, improving the accuracy and repeatability of the test results.

[0070] In this way, by setting up an adjustable-height support frame, upper and lower hinged supports with clamping structures, an oil pump and force sensor arranged coaxially with the loading center path, and anchoring and stiffening structures connected to a rigid foundation platform, impact test support under stable clamping conditions is achieved for the specimen. This allows for a more accurate construction of the stress environment of beam-column joints under actual working conditions, improving the realism of boundary simulation, the reliability of load transfer, the accuracy of measurement results, and the overall stability of the entire impact test system.

[0071] An impact load simulation test method for beam-column joints according to an embodiment of the present invention pre-applies axial load, sets the impact position and predetermined impact energy, records axial force values ​​during repeated impacts, and then constructs an impact performance scoring mechanism, realizing a quantitative characterization of the impact resistance of beam-column joints under complex stress conditions. It can more comprehensively simulate the stress state of the specimen under actual working conditions, improving the realism of the impact test results and the uniformity and repeatability of evaluation results across different working conditions. By setting an adjustable-height support frame, upper and lower hinged supports with clamping plate structures, an oil pump and force sensor arranged coaxially with the loading center path, and anchoring and stiffening structures connected to a rigid foundation platform, impact test support under stable clamping conditions is achieved for the specimen. It can more accurately construct the stress environment of the beam-column joint under actual working conditions, improving the realism of boundary simulation, the reliability of load transfer, the accuracy of measurement results, and the overall stability of the entire impact test system.

[0072] This invention can be a method, apparatus, system, and / or computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for performing various aspects of the invention.

[0073] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A method for simulating impact loads on beam-column joints, characterized in that, include: The specimen (19) was installed between the upper and lower hinge supports of the impact load simulation test device; By controlling the oil flow rate of the oil pump (3), the load between the upper and lower hinge supports is controlled, and the axial force value is monitored by the force sensor (5). When the load is applied to the preset load, the oil pressure is maintained so that the axial force remains vertical and stable, thereby clamping the specimen (19). Determine the impact position of the specimen (19), set a predetermined impact energy for the impact device (20), and impact the impact position of the specimen (19) through the impact device (20); During the impact process, the axial force value of the force sensor (5) is obtained, and the impact resistance score of the specimen (19) is determined based on the axial force value.

2. The impact load simulation test method for beam-column joints according to claim 1, characterized in that, During the impact process, the axial force value of the force sensor (5) is acquired, and the impact resistance performance of the specimen (19) is determined based on the axial force value, including: Determine the length of the clamping plate used by the upper and lower hinge supports to hold the specimen (19); The impact resistance of the specimen (19) is determined based on the length of the clamping plate and the value of the axial force.

3. The impact load simulation test method for beam-column joints according to claim 2, characterized in that, Based on the length of the clamping plate and the axial force value, the impact resistance score of the specimen (19) is determined, including: The specimen (19) was repeatedly impacted at multiple impact locations using various predetermined impact energies, and the axial force value was recorded for each impact. If the specimen (19) is not damaged after completing the preset number of impacts, the impact resistance performance score is set to 1. If the specimen (19) is damaged, the impact resistance score is determined based on the axial force value at each impact and the length of the clamp.

4. The impact load simulation test method for beam-column joints according to claim 3, characterized in that, If the specimen (19) is damaged, the impact resistance score is determined based on the axial force value at each impact and the length of the clamp, including: according to the formula: Determine the impact resistance rating S, where, Let be the axial force value at the i-th impact. Let n be the length of the clamping plate, and n be the number of impacts. It is designed to withstand a predetermined amount of energy.

5. An impact load simulation test system for beam-column joints, used to perform the method as described in any one of claims 1-4, characterized in that, include: Upper and lower hinged supports, oil pump (3), rigid foundation platform (22), force sensor (5), steel column (1) and I-beam (2); Among them, the steel column (1) is provided with multiple bolt holes (13), and the I-beam (2) is installed on the web of the steel column (1). Different installation heights can be achieved by changing the position of the bolt holes (13). The steel column (1) is fixed on the rigid foundation platform (22); A force sensor (5) is provided on the upper part of the upper and lower hinge supports. The central axes of the upper and lower hinge supports coincide and rotate at the inflection point when subjected to impact load. The upper and lower hinge support brackets hold the specimen (19) and control the applied load value by controlling the oil inlet of the oil pump (3), and can clamp the specimen (19).

6. The impact load simulation test system for beam-column joints according to claim 5, characterized in that, The upper and lower hinge support includes an upper hinge (6), a roller (7) and a lower hinge (8). The lower hinge (8) is provided with a clamping plate. The clamping plate of the lower hinge (8) of the upper and lower hinge support is used to clamp the specimen (19).

7. The impact load simulation test system for beam-column joints according to claim 6, characterized in that, The upper and lower hinge supports are in the same plane and maintain the same rotation under impact load.

8. The impact load simulation test system for beam-column joints according to claim 6, characterized in that, The vertical axes of the oil pump (3), force sensor (5), and upper and lower hinge supports coincide.

9. The impact load simulation test system for beam-column joints according to claim 5, characterized in that, The steel column (1) is fixed to the rigid foundation platform (22) by passing through the pre-reserved hole (12) at the column base with anchor bolts (21), and the I-beam (2), ground beam (10) and steel column base are reinforced with stiffening ribs (11), and the steel column (1) is reinforced with stiffening ribs (14).

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