Device and method for detecting shock resistance and toughness of steel structure

Abstract

The invention discloses a steel structure anti-seismic toughness detection device and a detection method, and relates to the field of anti-seismic detection. According to the scheme, the device comprises a supporting column, and a supporting platform is fixed to the top of the supporting column; the sliding table is in rolling connection with the supporting platform, a feedback device is hinged to the middle of the sliding table, and the other end of the feedback device is hinged to the supporting platform; the steel structure connecting platform is fixed to the top of the sliding table, screw holes are evenly formed in the surface of the steel structure connecting platform, and the steel structure connecting platform is used for connecting a steel structure; the simulation oil cylinders are uniformly distributed around the simulation oil cylinders; and an inner cavity of the pressure storage assembly is communicated with the plurality of simulation oil cylinders. Liquid inlet of the simulation oil cylinders is controlled through the pressure accumulation assembly, the pressure accumulation assembly accumulates high-pressure oil liquid in advance, the high-pressure oil liquid can enter the simulation oil cylinders to apply force to the direction at the moment that the simulation oil cylinders are communicated with a certain simulation oil cylinder, in this way, the simulation oil cylinders in different directions are continuously replaced to apply pressure to the sliding table, the sliding table can rapidly vibrate, and high-frequency seismic waves are simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of anti-seismic detection, and in particular to a steel structure anti-seismic toughness detection device and detection method. BACKGROUND

[0002] With the acceleration of urbanization and the popularity of high-rise buildings, the evaluation of the seismic performance of steel structures has become a core link to ensure building safety. Under the action of an earthquake, the toughness of a steel structure (i.e., the ability to absorb energy and maintain functionality) directly determines the damage degree of a building and the safety of personnel. To accurately evaluate the seismic toughness of a steel structure, experimental means are required to simulate the effects of an earthquake and quantify the structural response. Currently, the industry widely uses a hydraulic servo loading system as the core device to reproduce the dynamic effects of an earthquake by applying horizontal (transverse wave) or vertical (longitudinal wave) loads.

[0003] For example, the steel structure anti-seismic toughness detection device and detection method disclosed in CN118603469A includes four independent detection units and a steel structure shed. The four upright columns at the bottom of the steel structure shed are fixedly installed on the top of the four independent detection units by bolts. The independent detection unit includes a detection table, and a regulating table is rotatably installed in a transition circular groove at the top of the detection table.

[0004] However, the existing technology has significant defects in actual application, especially in the aspect of high-frequency vibration simulation, such as the vibration frequency of the hydraulic cylinder being directly limited by the rate of oil injection / evacuation. The existing hydraulic system is limited by the response delay of the servo valve and the flow rate of the pump station, resulting in a loading frequency usually lower than 5Hz. However, the high-frequency component of actual seismic waves corresponds to local resonance of the structure or response of the equipment, and the existing device cannot reproduce such high-frequency loads, resulting in an underestimate of the structural dynamic response in the test results. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a steel structure anti-seismic toughness detection device and detection method to simulate high-frequency seismic waves and complex seismic waves, thereby improving the detection authenticity.

[0006] To achieve the above technical purpose, the present application provides a steel structure anti-seismic toughness detection device and detection method.

[0007] It includes: support column, top fixed with support platform; sliding table, rolling connection with the support platform, and the middle part of the sliding table is hinged with feedback device, the other end of the feedback device is hinged with support platform; steel structure connecting platform, fixed with sliding table top, the surface is uniformly provided with screw hole, the steel structure connecting platform is used for connecting steel structure; simulation oil cylinder, uniformly distributed around the simulation oil cylinder, and the output part of the simulation oil cylinder is abutted with the edge of the sliding table, which is used for simulating different frequency band transverse wave or longitudinal wave; pressure storage assembly, inner cavity is communicated with a plurality of simulation oil cylinders, which is used for controlling the liquid inlet of different direction simulation oil cylinder; booster pump, the liquid outlet end is communicated with the pressure storage assembly through pipeline.

[0008] Preferably, the feedback device comprises: sleeve, end part is hinged with sliding table; push-pull rod, one end is hinged with support platform, the other end is slidingly connected with the sleeve; spring, arranged in the spring, and the two ends of the spring are respectively abutted with the push-pull rod and the sleeve.

[0009] Preferably, the simulation oil cylinder comprises: cylinder barrel, the cylinder barrel is slidingly sealed connected with cylinder rod, and the end part of the cylinder rod away from the cylinder barrel is abutted with the sliding table; liquid inlet pipe, the inner cavity of the cylinder barrel is communicated with the pressure storage assembly through the liquid inlet pipe; solenoid valve, fixed on the cylinder barrel.

[0010] Preferably, the pressure storage assembly comprises: pressure storage box, fixed on the support column; valve cylinder, rotationally sealed connected in the pressure storage box, the outer surface of the valve cylinder is provided with through hole; motor, fixed on the pressure storage box, the output end is fixedly connected with the top of the valve cylinder.

[0011] Preferably, the support platform comprises: fixed table, fixedly connected with the support column; connecting table, fixedly connected with the fixed table; ball, embedded in the fixed table and slidingly connected with the fixed table; limiting cover plate, fixed on the surface of the fixed table, used for limiting the ball.

[0012] Preferably, the liquid inlet end of the booster pump is connected with the oil return tank through pipeline, and the inner cavity of the oil return tank is communicated with the solenoid valve through pipeline.

[0013] Preferably, it further comprises:

[0014] The first acquisition module is used for acquiring the instantaneous force applied to the sliding table;

[0015] The second acquisition module is used for acquiring the displacement of steel structure;

[0016] The third acquisition module is used for acquiring the strain force of steel structure connecting node;

[0017] The fourth acquisition module is used for acquiring the acceleration of steel structure;

[0018] The analysis module formulates the toughness index based on the instantaneous force, displacement amount, strain force and acceleration, compares the toughness index with a preset toughness index, and determines whether it is qualified.

[0019] Preferably, it further comprises columns distributed around the steel structure connecting platform, and the second module is fixed on the columns.

[0020] A steel structure anti-seismic toughness detection method is realized based on the above steel structure anti-seismic toughness detection device, and the method comprises the following steps:

[0021] The steel structure is installed and fixed on the steel structure connecting platform, and the third and fourth acquisition modules are installed at the connecting nodes of the steel structure;

[0022] The booster pump and the pressure storage assembly are started, the booster pump provides high-pressure oil for the pressure storage assembly, and the pressure storage assembly circulates to provide high-pressure oil for the simulation oil cylinders in different directions, so that the simulation oil cylinders push the sliding table to vibrate on the support column.

[0023] The detection time and the detection intensity are preset, the anti-seismic data are collected during the detection, and the anti-seismic data collection is stopped after the preset detection time is reached, the anti-seismic data including the instantaneous force, displacement amount, strain force and acceleration;

[0024] Based on the anti-seismic data, it is determined whether the current steel structure is qualified.

[0025] Preferably, the method for determining whether the current steel structure is qualified comprises:

[0026] The toughness index is calculated based on the instantaneous force, displacement amount, strain force and acceleration;

[0027] The toughness index is compared with a preset toughness index, if the toughness index is greater than the preset toughness index, it is determined to be qualified;

[0028] If the toughness index is less than the preset toughness index, it is determined to be unqualified.

[0029] From the above technical solutions, the present application has the following beneficial effects:

[0030] 1: By distributing multiple simulation oil cylinders around the sliding table, and controlling the liquid inlet of the simulation oil cylinders through the pressure storage assembly, the pressure storage assembly accumulates high-pressure oil in advance, and the instantaneous high-pressure oil connected with a certain simulation oil cylinder can enter the simulation oil cylinder to apply force in this direction. By continuously replacing the simulation oil cylinders in different directions to apply pressure to the sliding table, the sliding table can be quickly vibrated to simulate high-frequency seismic waves.

[0031] 2: by connecting the sliding table on the support platform, reduce the vibration friction of the sliding table, and through the force feedback of the feedback device, assist the sliding table to produce vibration, cooperate with the multi-directional simulation oil cylinder to provide more complex seismic waves, and improve the detection authenticity. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0033] Figure 1 The overall structure schematic diagram of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 2 The partial sectional view structure schematic diagram of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 3 The sectional view structure schematic diagram of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 4 The overall structure schematic diagram of the sliding table of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 5 The overall structure schematic diagram of the support column of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 6 The overall structure schematic diagram of the simulation oil cylinder and pressure accumulation assembly of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure. Figure 7 The analysis module structure schematic diagram of the steel structure anti-seismic toughness detection device provided by the present application is shown in the figure.

[0034] Brief description of drawings: 1, support column; 11, support platform; 111, fixed table; 112, connecting table; 113, ball; 114, limiting cover plate; 2, sliding table; 21, feedback device; 211, sleeve; 212, push-pull rod; 213, spring; 3, steel structure connecting platform; 4, simulation oil cylinder; 41, cylinder barrel; 42, cylinder rod; 43, liquid inlet pipe; 44, electromagnetic valve; 5, pressure accumulation assembly; 51, pressure accumulation box; 52, valve barrel; 53, motor; 6, booster pump; 7, oil return tank. DETAILED DESCRIPTION

[0035] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or similar elements and features. The various drawings illustrate only exemplary embodiments of the present disclosure and are not intended to limit the scope of the present disclosure in any way. Relative dimensions of the various parts in the particular drawings can not be to scale, but can be exaggerated to illustrate the relevant elements or structures of the exemplary embodiments of the present disclosure.

[0036] Embodiment 1, refer to Figures 1-7 As shown in the figure, a steel structure anti-seismic toughness detection device, including support column 1, slide table 2, steel structure connecting platform 3, simulation oil cylinder 4, pressure storage assembly 5 and booster pump 6, the top of support column 1 is fixed with support platform 11, slide table 2 is rolling connected with support platform 11, steel structure connecting platform 3 is fixed with the top of slide table 2, screw holes are uniformly arranged on the surface of steel structure connecting platform 3, steel structure of different specifications and hole spacing is installed on steel structure connecting platform 3, simulation oil cylinder 4 is uniformly distributed around simulation oil cylinder 4, and the output part of simulation oil cylinder 4 is in abutment with the edge of slide table 2, for simulating different frequency bands of transverse wave or longitudinal wave, the inner cavity of pressure storage assembly 5 is communicated with a plurality of simulation oil cylinders 4, for controlling the liquid inlet of simulation oil cylinder 4 in different directions, and the liquid outlet end of booster pump 6 is communicated with pressure storage assembly 5 through pipeline.

[0037] It is worth mentioning that simulation oil cylinder 4 and booster pump 6 are arranged separately from support column 1, avoiding the influence of slide table 2 vibration on simulation oil cylinder 4 and booster pump 6.

[0038] Further, refer to Figure 3 As shown in the figure, the middle part of slide table 2 is hinged with feedback device 21, the other end of feedback device 21 is hinged with support platform 11, feedback device 21 includes sleeve 211, push-pull rod 212 and spring 213, the end of sleeve 211 is hinged with slide table 2, one end of push-pull rod 212 is hinged with support platform 11, the other end of push-pull rod 212 is slidingly connected with sleeve 211, spring 213 is arranged in spring 213, and the two ends of spring 213 are in abutment with push-pull rod 212 and sleeve 211 respectively, when slide table 2 is slid in a certain direction due to the force applied by a certain direction simulation oil cylinder 4, push-pull rod 212 is extruded, so that spring 213 is extruded to store energy, when the simulation oil cylinder 4 in this direction loses liquid, the force stored in spring 213 is fed back to push-pull rod 212, so that push-pull rod 212 is fed back to slide table 2, so as to reciprocate, so as to simulate the vibration wave.

[0039] Further, refer to Figure 2As shown, the simulation oil cylinder 4 includes a cylinder barrel 41, a liquid inlet pipe 43 and a solenoid valve 44, the inside of the cylinder barrel 41 is slidingly and sealingly connected with a cylinder rod 42, the end of the cylinder rod 42 away from the cylinder barrel 41 is abutted with the sliding table 2, the inner cavity of the cylinder barrel 41 is communicated with the pressure storage assembly 5 through the liquid inlet pipe 43, and the solenoid valve 44 is fixed on the cylinder barrel 41, when the liquid inlet pipe 43 supplies oil into the cylinder barrel 41, the solenoid valve 44 is closed, and vice versa, the solenoid valve 44 is opened to discharge the oil in the cylinder barrel 41.

[0040] The pressure storage assembly 5 includes a pressure storage tank 51, a valve barrel 52 and a motor 53, the pressure storage tank 51 is fixed on the support column 1, the valve barrel 52 is rotatingly and sealingly connected in the pressure storage tank 51, the outer surface of the valve barrel 52 is provided with a through hole, and the motor 53 is fixed on the pressure storage tank 51 and is fixedly connected with the top of the valve barrel 52.

[0041] For example, when the motor 53 drives the valve barrel 52 to rotate, when the through hole coincides with the connection points of the liquid inlet pipe 43 and the pressure storage tank 51, the high-pressure oil accumulated in the pressure storage tank 51 can enter the cylinder barrel 41 to push the cylinder rod 42 at once; and when the through hole does not coincide with the liquid inlet pipe 43, the pressure storage tank 51 is completely closed, at this time, the booster pump 6 supplements the hydraulic oil into the pressure storage tank 51; and the above-mentioned reciprocating operation can control multiple orientation cylinder barrels 41 to work in turns to simulate complex seismic waves.

[0042] It is worth mentioning that in some embodiments, the pressure storage tank 51 can be designed as multiple pressure storage tanks to further improve the liquid inlet speed of multiple simulation oil cylinders 4.

[0043] Specifically, the support platform 11 includes a fixed table 111, a ball 113 and a limiting cover plate 114, the fixed table 111 is fixedly connected with the support column 1, the connecting table 112 is fixedly connected with the fixed table 111, the ball 113 is embedded in the fixed table 111 and is slidingly connected with the fixed table 111, the limiting cover plate 114 is fixed on the surface of the fixed table 111, the limiting cover plate 114 is used for limiting the ball 113, and the sliding table 2 is rollingly connected with the ball 113 to reduce the sliding friction of the sliding table 2.

[0044] The liquid inlet end of the booster pump 6 is connected with an oil return tank 7 through a pipeline, and the inner cavity of the oil return tank 7 is communicated with the solenoid valve 44 through a pipeline, and the oil return tank 7 is used for accumulating oil.

[0045] In the embodiment 2, based on the above-mentioned embodiment, the steel structure anti-seismic toughness detection device further includes a first acquisition module, a second acquisition module, a third acquisition module and a fourth acquisition module, and each module is connected through wired and / or wireless connection.

[0046] The first acquisition module is used for acquiring the instantaneous force applied to the sliding table 2, and the first acquisition module adopts a pressure sensor installed on the simulation oil cylinder 4 to acquire the force applied to the sliding table 2.

[0047] The second acquisition module is used for acquiring the displacement amount of the steel structure, representing the deformation capacity and damage process of the structure. The four sides of the steel structure connecting platform 3 are provided with stand columns which are not in contact with the steel structure connecting platform 3, so as to avoid the influence of vibration on the stand columns. The second acquisition module is provided with, for example, a laser displacement meter or an LVDT which is installed and fixed on the stand column.

[0048] The third acquisition module is used for acquiring the strain force of the connecting joint of the steel structure. The third acquisition module is provided with a strain gauge which is installed at the connecting joint of the steel structure, and is used for judging whether yield or local buckling occurs.

[0049] The fourth acquisition module is used for acquiring the acceleration of the steel structure. The fourth acquisition module is provided with an accelerometer. The acceleration is used for judging the vibration intensity and cycle characteristic change of the structure.

[0050] The analysis module is used for formulating the toughness index based on the instantaneous force, displacement amount, strain force and acceleration. The toughness index is compared with a preset toughness index, and it is determined whether the steel structure is qualified.

[0051] It should be noted that the specific calculation formula of the toughness index and the preset toughness index are determined by the person skilled in the art according to the actual situation. For example, the toughness index is obtained by calculating the energy dissipation, ductility ratio, stiffness degradation ratio and damage index, and then normalized. The specific calculation method is not limited here.

[0052] A steel structure seismic toughness detection method is realized based on the above-mentioned steel structure seismic toughness detection device. The method comprises the following steps:

[0053] The steel structure is installed and fixed on the steel structure connecting platform 3. The third acquisition module and the fourth acquisition module are installed at the connecting joint of the steel structure.

[0054] The booster pump 6 and the pressure storage assembly 5 are started. The booster pump 6 provides high-pressure oil for the pressure storage assembly 5. The pressure storage assembly 5 circulates to provide high-pressure oil for the simulation oil cylinders 4 in different directions, so that the simulation oil cylinders 4 drive the sliding table 2 to vibrate on the support column 1.

[0055] The detection time and the detection intensity are preset. During the detection process, the seismic data are acquired. When the preset detection time is reached, the acquisition of the seismic data is stopped. The seismic data include the instantaneous force, displacement amount, strain force and acceleration.

[0056] It is determined whether the current steel structure is qualified based on the seismic data.

[0057] The method for determining whether the current steel structure is qualified comprises the following steps:

[0058] The toughness index is calculated based on the instantaneous force, displacement amount, strain force and acceleration.

[0059] The toughness index is compared with a preset toughness index. If the toughness index is greater than the preset toughness index, it is determined to be qualified.

[0060] If the toughness index is less than the preset toughness index, it is determined to be unqualified.

[0061] The above describes the exemplary embodiments of the solutions proposed by the present disclosure in detail with reference to preferred embodiments. However, those skilled in the art can understand that various modifications and changes can be made to the above specific embodiments, and various technical features and structures proposed by the present disclosure can be combined without departing from the concept of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. A device for testing the seismic toughness of steel structures, characterized in that, Include: Support column (1), the top is fixed with support platform (11); Slide table (2), with the support platform (11) rolling connection, and the middle part of the slide table (2) is hinged with feedback device (21), the other end of the feedback device (21) is hinged with support platform (11); Steel structure connecting platform (3), fixed with the top of slide table (2), the surface is uniformly provided with screw hole, the steel structure connecting platform (3) is used for connecting steel structure; Simulation oil cylinder (4), evenly distributed around the simulation oil cylinder (4), and the output part of the simulation oil cylinder (4) is abutted with the edge of slide table (2), for simulating different frequency band transverse wave or longitudinal wave; Pressure storage assembly (5), the inner cavity is communicated with a plurality of simulation oil cylinder (4), for controlling different direction simulation oil cylinder (4) liquid inlet; The liquid inlet end of the booster pump (6) is communicated with the pressure storage assembly (5) through the pipeline.

2. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, The feedback device (21) comprises: Sleeve (211), end part is hinged with slide table (2); Push-pull rod (212), one end is hinged with support platform (11), the other end is slidingly connected with the sleeve (211); Spring (213), arranged in spring (213), and the two ends of the spring (213) are respectively abutted with push-pull rod (212) and sleeve (211).

3. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, The simulation oil cylinder (4) comprises: Cylinder barrel (41), the inside is slidingly sealed connected with cylinder rod (42), and the end part of the cylinder rod (42) away from the cylinder barrel (41) is abutted with the slide table (2); Liquid inlet pipe (43), the inner cavity of the cylinder barrel (41) is communicated with the pressure storage assembly (5) through the liquid inlet pipe (43); electromagnetic valve (44), fixed on the cylinder barrel (41).

4. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, The pressure storage assembly (5) comprises: Pressure storage box (51), fixed on the support column (1); Valve cylinder (52), rotatingly sealed connected in the pressure storage box (51), the outer surface of the valve cylinder (52) is provided with through hole; Motor (53), fixed on the pressure storage box (51), the output end is fixedly connected with the top of the valve cylinder (52).

5. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, The support platform (11) comprises: Fixed table (111), fixedly connected with support column (1); Connecting table (112), fixedly connected with fixed table (111); Ball (113), embedded in fixed table (111) and slidingly connected with fixed table (111); Limit cover plate (114), fixed on the surface of fixed table (111), used for limiting ball (113).

6. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, The liquid inlet end of the booster pump (6) is connected with the oil return tank (7) through the pipeline, and the inner cavity of the oil return tank (7) is communicated with the electromagnetic valve (44) through the pipeline.

7. The steel structure anti-seismic toughness detection device according to claim 1, characterized in that, Further comprising: First acquisition module, for collecting the instantaneous force applied to the slide table (2); Second acquisition module, for collecting the displacement of steel structure; Third acquisition module, for collecting the strain force of steel structure connecting node; Fourth acquisition module, for collecting steel structure acceleration; Analysis module, based on instantaneous force, displacement, strain force and acceleration formula calculation flexibility index, compare flexibility index with preset flexibility index, determine whether it is qualified.

8. The steel structure anti-seismic toughness detection device according to claim 7, characterized in that, Further comprising: The second module is fixed on the column.

9. A method for detecting the seismic toughness of a steel structure, implemented on the basis of the device for detecting the seismic toughness of a steel structure according to claim 8, characterized by, The method comprises: installing the steel structure to the steel structure connecting platform (3), and installing the third and fourth collecting modules at the connecting nodes of the steel structure; starting the booster pump (6) and the pressure storage assembly (5), providing high-pressure oil for the pressure storage assembly (5) through the booster pump (6), circulating high-pressure oil for the simulation oil cylinders (4) in different directions through the pressure storage assembly (5), and enabling the simulation oil cylinders (4) to push the sliding table (2) to vibrate on the support column (1); presetting a detection time and a detection intensity, collecting anti-seismic data during the detection, stopping the collection of the anti-seismic data when the preset detection time is reached, and the anti-seismic data comprising instantaneous force, displacement, strain force and acceleration; determining whether the current steel structure is qualified based on the anti-seismic data.

10. The method of claim 9, wherein the steel structure is a steel structure of a building. The method for determining whether the current steel structure is qualified comprises: formulating the flexibility index based on the instantaneous force, displacement, strain force and acceleration; comparing the flexibility index with a preset flexibility index, and determining that the current steel structure is qualified if the flexibility index is greater than the preset flexibility index; determining that the current steel structure is unqualified if the flexibility index is less than the preset flexibility index.

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