An explosion test platform and test method for a column component

Abstract

The present invention relates to the technical field of anti-explosion test of column members, and discloses an explosion test platform and a test method for column members. The explosion test platform for column members includes a base, columns arranged at intervals on the base, and cross beams. One end of the cross beam is rotatably connected to the upper part of the reaction column, and the other end of the cross beam is arranged at the upper end of the column. A pull rod for applying a downward acting force to the cross beam is provided on the base, and a strain detection member for detecting the axial strain of the pull rod is provided on the pull rod to detect the strain of the pull rod and calculate the axial force applied by the pull rod to the end of the column. A fixing member is arranged on the base at a horizontal interval from the column, and a displacement sensor is provided on the fixing member to detect the displacement generated by the column in the horizontal direction during the explosion, so as to establish the action relationship between the deformation of the column under the explosion load and the axial force received by the column.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-explosion test of column members, and particularly relates to an explosion test platform and test method for column members. Background Art

[0002] Columns are common structural members and are mostly used as load-bearing structures in buildings. Previous explosion accidents have shown that the failure of load-bearing structures under impact / explosion loads is the fundamental cause of structural collapse.

[0003] Numerical simulation and theoretical analysis provide an effective means for structural anti-explosion, but their accuracy depends on the rationality of the calculation model and constitutive relationship. Anti-explosion test is an important means to reveal the dynamic response and failure mechanism of structures. Therefore, accurately obtaining the input and output parameters during the anti-explosion test is the premise for ensuring the accuracy of the calculation model and constitutive relationship.

[0004] However, the current column explosion test platform does not consider the influence of axial force on the anti-explosion performance of columns, resulting in inaccurate calculation models established based on the input and output parameters of the explosion test. Summary of the Invention

[0005] The main object of the present invention is to provide an explosion test platform and test method for column members, aiming to apply an axial force to the column and obtain the magnitude of the axial force and the test data of the horizontal displacement of the column during the test, so as to establish the action relationship between the horizontal displacement of the column and the axial force received by the column under the action of explosion load.

[0006] To solve the above technical problems, the present invention provides an explosion test platform for column members, including a base, a column, a reaction column, and a cross beam; the column and the reaction column are arranged at intervals on the base, one end of the cross beam is rotatably connected to the upper part of the reaction column, and the other end of the cross beam is arranged at the upper end of the column;

[0007] A pull rod for applying a downward acting force to the cross beam is provided on the base, the pull rod is located between the reaction column and the column, and a strain detection member for detecting the axial strain of the pull rod is provided on the pull rod;

[0008] A fixing member spaced from the column is fixedly connected to the base, and a displacement sensor for detecting the horizontal displacement of the column is provided on the fixing member.

[0009] As a preferred solution, the lower end of the pull rod is fixedly connected to the base, a through hole matching the pull rod is provided on the cross beam, and the upper end of the pull rod passes through the through hole and is connected with a fixing block;

[0010] An elastic member is sleeved on the pull rod, and the elastic member is located between the lower end surface of the fixed block and the upper end surface of the cross beam;

[0011] The strain detection member is located below the cross beam.

[0012] As a preferred solution, the fixing member includes a first explosion-proof wall and a second explosion-proof wall that are relatively spaced apart on the base, and the column is arranged between the first explosion-proof wall and the second explosion-proof wall;

[0013] A connecting plate is fixedly connected to the side of the first explosion-proof wall opposite to the column, and the other end of the connecting plate is fixedly connected to the side of the second explosion-proof wall opposite to the column; the displacement sensor is arranged on the connecting plate, and the detection end of the displacement sensor abuts against the side wall of the column.

[0014] As a preferred solution, a plurality of the connecting plates are arranged at intervals along the axial direction of the column, and the displacement sensors are arranged on each of the connecting plates.

[0015] As a preferred solution, pressure sensors are arranged on one side of the first explosion-proof wall and / or the second explosion-proof wall facing away from the reaction column, the pressure sensors are arranged at positions close to the column, and a plurality of the pressure sensors are arranged at intervals along the height direction of the column.

[0016] As a preferred solution, elastic seals are filled between the first explosion-proof wall and the column and between the second explosion-proof wall and the column.

[0017] As a preferred solution, a first guard plate extending in the direction of the reaction column is provided at one end of the first explosion-proof wall away from the column; a second guard plate extending in the direction of the reaction column is provided at one end of the second explosion-proof wall away from the column.

[0018] An explosion test method for a column member includes the following steps:

[0019] Step S1. Construct an explosion test platform for the above column member, and set explosives at a position separated from the column by a set distance;

[0020] Step S2. Detonate the explosives;

[0021] Step S3. Obtain the axial strain data of the pull rod during the explosion through the strain detection member, and obtain the horizontal displacement data of the column during the explosion through the displacement sensor;

[0022] Step S4. Calculate the total axial force acting on the column according to the axial strain data;

[0023] Step S5: Obtain the relationship between the horizontal displacement and the total axial force of the column based on the horizontal displacement data and the total axial force data of the column.

[0024] As a preferred solution, after the step S2, it further includes obtaining the distribution data of the explosion shock wave along the column height direction of the column through the pressure sensor, and obtaining the overpressure time history curve of the explosion shock wave according to the distribution data;

[0025] The step S5 further includes obtaining the variation relationship of the horizontal displacement of the column with the total axial force and the explosion shock wave according to the horizontal displacement data of the column, the total axial force data, and the overpressure time history curve of the explosion shock wave.

[0026] As a preferred solution, in the step S4, the calculation formula for the total axial force acting on the column obtained according to the axial strain data is:

[0027] N = d + G / 2;

[0028] where N is the total axial force acting on the column, E is the elastic modulus of the tie rod, A is the cross-sectional area of the tie rod, is the horizontal distance between the axis of the tie rod and the reaction column, is the tensile strain of the tie rod detected by the resistance strain gauge, d is the horizontal distance from the column to the reaction column, and G is the gravity of the cross beam.

[0029] Compared with the prior art, the explosion test platform for the column member of the present invention has the following beneficial effects:

[0030] The explosion test platform for the column member of the present invention includes a base, a column, a reaction column, and a cross beam; the column and the reaction column are arranged at intervals on the base, one end of the cross beam is rotatably connected to the upper part of the reaction column, and the other end of the cross beam is arranged at the upper end of the column; by estimating or weighing the cross beam in advance, the axial force exerted by the cross beam on the column can be obtained; a pull rod for applying a downward acting force to the cross beam is provided on the base, the pull rod is located between the reaction column and the column, and a strain detection member for detecting the axial strain of the pull rod is provided on the pull rod; by detecting the strain of the pull rod by the strain detection member and calculating the axial force exerted by the pull rod on the end of the column according to Hooke's law and the lever principle, the sum of the axial force exerted by the above pull rod on the end of the column and the axial force exerted by the cross beam on the column is the total axial force received by the column; a fixing member arranged at an interval from the column is fixedly connected to the base, and a displacement sensor is provided on the fixing member. The displacement sensor can detect the displacement generated in the horizontal direction of the column under the action of the total axial force when the column is subjected to an explosion load, thereby establishing the action relationship between the deformation of the column under the explosion load and the total axial force received by the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of an explosion test platform for a column member according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of the back explosion surface of the fixing member;

[0033] Figure 3 is a schematic diagram of the front explosion surface of the fixing member;

[0034] Figure 4 is a schematic diagram of the structure of the reaction column and the cross beam;

[0035] Figure 5 is a schematic diagram of the structure of the column;

[0036] In the figure, 1, base; 2, column; 21, column base; 3, reaction column; 31, steel support; 4, cross beam; 5, pull rod; 51, strain detection member; 52, fixing block; 53, elastic member; 6, fixing member; 61, first explosion-proof wall; 611, first steel plate; 62, second explosion-proof wall; 621, second steel plate; 63, first protective plate; 64, second protective plate; 65, connecting plate; 7, displacement sensor; 8, pressure sensor; 9, explosive; 91, explosive fixing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0039] As Figure 1 shown, a preferred embodiment of an explosion test platform for a column member of the present invention includes a base 1, a column 2, a reaction column 3, and a cross beam 4; the column 2 and the reaction column 3 are arranged at intervals on the base 1, one end of the cross beam 4 is hinged to the upper part of the reaction column 3 so as to be rotatable up and down, and the other end of the cross beam 4 is arranged at the upper end of the column 2; by estimating or weighing the cross beam 4 in advance, the downward acting force exerted by the cross beam 4 on the column 2 can be obtained; a pull rod 5 for applying a downward acting force to the cross beam 4 is provided on the base 1, the pull rod 5 is located between the reaction column 3 and the column 2, and a strain detection member 51 for detecting the axial strain of the pull rod 5 is provided on the pull rod 5; a fixing member 6 arranged at an interval from the column 2 is fixedly connected to the base 1, and a displacement sensor 7 for detecting the horizontal displacement of the column 2 is provided on the fixing member 6.

[0040] Specifically, the lower end of the reaction column 3 is fixedly connected to the base 1, the column 2 and the reaction column 3 are arranged horizontally at intervals and the lower part of the column 2 is inserted into the base 1. The base 1 is a reinforced concrete base, and the lower end of the reaction column 3 is fixedly connected to the base 1. To increase the bending resistance of the reaction column 3, a plurality of steel supports 31 arranged obliquely to the base 1 are provided at intervals along the circumferential direction of the reaction column 3 on the base 1. The steel supports 31 can further keep the reaction column 3 stable and make the reaction column 3 in a vertical state. One end of the cross beam 4 is hinged to the upper part of the side wall of the reaction column 3 through a directional spherical hinge; the other end of the cross beam 4 is detachably connected to the end of the upper end of the column 2 through bolts; the pull rod 5 is a high-strength steel pull rod, the lower end of the pull rod 5 is anchored to the base 1, and the strain detection member 51 is a resistance strain gauge pasted on the surface of the pull rod 5. The resistance strain gauge is a prior art, and it is connected to a data acquisition device through a data line or a wireless communication module, such as at least one of a WIFI communication module, a GPRS communication module, or a Bluetooth communication module, etc. By adjusting the sampling frequency of the data acquisition device, for example, a tensile strain data detected by the corresponding resistance strain gauge is collected every 0.001 milliseconds. For subsequent calculation and statistical analysis in combination with the known elastic modulus of the tie rod 5, the known cross-sectional area A, and the horizontal distance between the axis of the tie rod 5 and the reaction column 3, the strain of the tie rod 5 detected by the strain detection member 51 is used, and according to Hooke's law and the lever principle, the axial force exerted by the tie rod 5 on the end of the column 2 is calculated to obtain the axial force data provided by the tie rod 5 to the column 2 at different times; adding the downward force exerted by the cross beam 4 on the column 2 to the axial force data provided by the tie rod 5 to the column 2 at different times can obtain the total axial force received by the column 2; preferably, the tie rod 5 is arranged perpendicular to the cross beam 4 to facilitate determining the horizontal distance between the axis of the tie rod 5 and the reaction column 3.

[0041] The displacement sensor 7 can detect the displacement generated by the column 2 in the horizontal direction during the explosion process, so as to obtain the horizontal displacement data of the column 2 under the action of the explosion load, and further establish the action relationship between the horizontal displacement of the column 2 under the action of the explosion load and the total axial force received by the column 2.

[0042] Among them, to realize the downward force exerted by the tie rod 5 on the cross beam 4, there are various connection methods between the upper end of the tie rod 5 and the cross beam 4. In this embodiment, a through hole matching the tie rod 5 and extending in the up and down direction is provided on the cross beam 4. The upper end of the tie rod 5 passes through the through hole and is connected with a fixing block 52. An elastic member 53 is sleeved on the tie rod 5, and the elastic member 53 is located between the fixing block 52 and the cross beam 4. The strain detection member 51 is located below the cross beam 4.

[0043] Specifically, as Figure 1 shown, the reaction column 3 and the explosive 9 of this embodiment are respectively arranged on the left and right sides of the column 2. When the explosive 9 is detonated, the column 2 bends and deforms towards the side of the reaction column 3 under the action of the explosion shock wave. The upper end of the column 2 exerts an axial pressure on the cross beam 4 along the axis of the cross beam 4 and pointing towards the reaction column 3. Under the action of the above axial pressure, the middle part of the cross beam 4 bends downward. A compression spring is arranged between the fixing block 52 and the upper end surface of the cross beam 4. When the middle part of the cross beam 4 bends downward, the compression spring can continuously exert a downward force on the cross beam 4. Therefore, the setting of the compression spring enables the experimenter to flexibly adjust the magnitude of the axial force borne by the column 2 during the explosion by setting different numbers of tie rods and compression springs with different compression strengths, providing a guarantee for studying the relevant parameters at different time points during the entire explosion process.

[0044] In this embodiment, the fixing block 52 is a nut, and the nut is threadedly connected to the tie rod 5. The compression force of the compression spring can be adjusted by adjusting the distance between the nut and the cross beam 4; a plurality of tie rods 5 are arranged at intervals along the length direction of the cross beam 4.

[0045] In this embodiment, as Figure 2As shown, the fixing member 6 includes a first explosion-proof wall 61 and a second explosion-proof wall 62 which are arranged relatively at intervals on the base, and the column 2 is arranged between the first explosion-proof wall 61 and the second explosion-proof wall 62; a connecting plate 65 is fixedly connected to the side of the first explosion-proof wall 61 opposite to the column 2, and the other end of the connecting plate 65 is fixedly connected to the side of the second explosion-proof wall 62 opposite to the column 2; a displacement sensor 7 is arranged on the connecting plate 65, and a detection end of the displacement sensor 7 abuts against the side wall of the column 2.

[0046] Specifically, Figure 1 As shown, the explosive 9 in this embodiment is arranged on the right side of the column 2, the surfaces of the first explosion-proof wall 61 and the second explosion-proof wall 62 opposite to the explosive 9 are the front explosion surfaces, and the surfaces of the first explosion-proof wall 61 and the second explosion-proof wall 62 opposite to the reaction column 3 are the back explosion surfaces. In this embodiment, the connecting plate 65 is arranged on the back explosion surfaces of the first explosion-proof wall 61 and the second explosion-proof wall 62, the housing of the displacement sensor 7 is fastened to the connecting plate 65, and the detection rod of the displacement sensor 7 is abutted against the side wall of the column 2 away from the explosive 9, thereby preventing the explosion shock wave from damaging the displacement sensor 7.

[0047] In this embodiment, a plurality of connecting plates 65 are provided at intervals along the axial direction of the column, and each connecting plate 65 is provided with a displacement sensor 7. The plurality of displacement sensors 7 can detect the displacement change of the column 2 along the column height direction under the action of the explosion shock wave, further improving the accuracy of the test. The displacement sensor 7 is a prior art, and has a variety of implementations, preferably a sliding line resistance displacement meter, which can be connected to a data acquisition device through a data line or a wireless communication module, such as at least one of a WIFI communication module, a GPRS communication module or a Bluetooth communication module, and by adjusting the sampling frequency of the data acquisition device, for example, a lateral displacement data detected by the corresponding displacement sensor 7 is collected every 0.001 milliseconds, and the corresponding deflection at different times is automatically recorded, thereby obtaining the deflection-time relationship curve of the column 2 during the test.

[0048] In this embodiment, Figure 3 As shown, a pressure sensor 8 is provided at the side wall of the first explosion-proof wall 61 and / or the second explosion-proof wall 62 on the side away from the reaction column 3. The pressure sensor 8 is arranged at a position close to the column 2, and a plurality of pressure sensors 8 are arranged at intervals along the height direction of the column 2. The plurality of pressure sensors 8 can record the overpressure time history curve of the explosion shock wave, and obtain the non-uniform distribution of the explosion shock wave along the column height direction of the column component. The plurality of pressure sensors 8 can record the overpressure time history curve of the explosion shock wave and the axial force received by the column 2 as input parameters of the explosion test, and further analyze the influence of the distribution characteristics of the explosion load on the dynamic response and failure mode of the column 2.

[0049] Among them, the pressure sensor 8 is a prior art and has various implementation manners. Preferably, it is a pressure sensor of the imported PCB series from the United States. It can be connected to the data acquisition device through at least one of a data line or a wireless communication module, such as a WIFI communication module, a GPRS communication module, or a Bluetooth communication module, etc. By adjusting the sampling frequency of the data acquisition device, for example, collecting the overpressure data of the explosion shock wave at the corresponding position every 0.001 milliseconds, and automatically recording the overpressure time history curves corresponding to different moments, and then obtaining the overpressure-time relationship curves at different heights of the column 2 during the test.

[0050] In this embodiment, elastic seals are filled in the gaps between the first explosion-proof wall 61 and the column 2 and between the second explosion-proof wall 62 and the column 2. The setting of the elastic seals can prevent the leakage of the explosion shock wave and further improve the accuracy of the test data. Specifically, the elastic seal is a rubber sheet.

[0051] In this embodiment, a first steel plate 611 is provided on the side wall of the first explosion-proof wall 61 facing away from the reaction column 3; a second steel plate 621 is provided on the side wall of the second explosion-proof wall 62 facing away from the reaction column 3. The settings of the first steel plate 611 and the second steel plate 621 prevent the damage to the explosion-facing surfaces of the first explosion-proof wall 61 and the second explosion-proof wall 62 during the explosion process.

[0052] In this embodiment, a first protective plate 63 extending in the direction of the reaction column 3 is provided at one end of the first explosion-proof wall 61 away from the column 2, and a second protective plate 64 extending in the direction of the reaction column 3 is provided at one end of the second explosion-proof wall 62 away from the column 2.

[0053] Specifically, the first explosion-proof wall 61 and the first protective plate 63 are an integrally formed first L-shaped ultra-high-strength concrete protective wall, and the second explosion-proof wall 62 and the second protective plate 64 are an integrally formed second L-shaped ultra-high-strength concrete protective wall. The two ultra-high-strength concrete protective walls enclose a U-shaped sealing structure, and the displacement sensor 7 is arranged inside the U-shaped sealing structure, which can prevent the diffraction of the explosion shock wave from damaging the displacement sensor 7.

[0054] In this embodiment, as Figure 5 shown, a column base 21 is provided at the bottom of the column 2. The column base 21 is clamped in the foundation pit reserved by the base 1. The column base 21 and the cross beam 4 form a fixed constraint on the column 2 and keep it in a vertical state. The column 2 is preferably of a constant cross-section, and its cross-sectional shape is preferably circular, square, or rectangular.

[0055] It should be noted that the data of the axial acting force exerted by the tie rod 5 on the column 2 in this embodiment N can be calculated and obtained based on the stress-strain relationship of Hooke's law and the lever principle. Taking four tie rods 5 as an example, specifically:

[0056] From left to right, the vertical acting force provided by each tie rod 5 is ( i = 1, 2, 3, 4):

[0057] Formula (1);

[0058] The axial forces exerted by all four tie rods 5 on the column 2 are n:

[0059] n / d Formula (2);

[0060] Substituting Formula (1) into Formula (2) can obtain the axial acting force n exerted by all four tie rods 5 on the column 2, where is the elastic modulus of the tie rod 5, A is the cross-sectional area of the tie rod 5, is the horizontal distance between the axis of the tie rod 5 and the reaction column 3, all of which are known quantities, is the tensile strain of the i th tie rod 5 detected by the corresponding strain detector 51 from left to right.

[0061] The total axial acting force received by the column 2 is N:

[0062] N = n + G / 2 Formula (3)

[0063] where G is the gravity of the cross beam 4.

[0064] An embodiment of an explosion test method for a column member includes the following steps

[0065] Step S1. Set up the explosion test platform for the above-mentioned column member, and set the explosive 9 at a position separated from the column 2 by a set distance;

[0066] Step S2. Detonate the explosive;

[0067] Specifically, the explosive 9 is preferably a TNT spherical or cylindrical explosive, which stands on the central axis of the column 2 at a certain distance from the column 2 through the explosive fixing rod 91. The horizontal distance between the explosive 9 and the axis of the column 2 can be determined according to the test requirements in combination with factors such as the proportional distance of the explosive and the material, length, and cross-sectional size of the column 2. There are various implementation methods for detonating the explosive to ensure the safety of the test and not affect the smooth progress of the test. For example, a No. 4 copper electric detonator can be used for remote central detonation. After the explosive explodes, an explosive load is mainly applied to the explosion-facing surface of the column 2. In addition, by changing the mass of the explosive, explosive loads with different proportional explosion distances can be obtained, and non-uniform explosion effects of different magnitudes can be applied.

[0068] Step S3. Obtain the axial strain data of the tie rod 5 during the explosion process through the strain detection component 51, and obtain the horizontal displacement data of the column 2 during the explosion process through the displacement sensor 7;

[0069] Step S4. Calculate the total axial force acting on the column 2 based on the above axial strain data;

[0070] Step S5. Obtain the relationship between the horizontal displacement and the total axial force of the column 2 based on the above horizontal displacement data and total axial force data of the column 2.

[0071] Specifically, through the data acquisition and analysis device, at different moments when the column 2 is under the action of the explosion load, collect the tensile strain data of the tie rod 5 monitored by the resistance strain gauge and the lateral displacement of the column 2 monitored by each displacement sensor 7, for subsequent combination with the known elastic modulus of the tie rod 5 the known cross-sectional area A and the known horizontal distance between the axis of each tie rod 5 and the reaction column 3 for calculation and statistical analysis, obtain the axial force data n provided by all tie rods 5 for the column 2 at different moments, so as to obtain the magnitude of the axial force corresponding to the lateral displacement of the column 2 at different moments under the explosion load, as well as the deflection-time relationship of the column 2 under the combined action of the explosion load and the axial force, and quantitatively judge the influence of the axial force on the anti-explosion bearing capacity of the column, and then establish the action relationship between the horizontal displacement of the column 2 and the axial force received by the column 2 under the explosion load. So that the bearing capacity of the column 2 can be reasonably utilized, correctly guide the anti-explosion design of the project, and improve the test effect and save the test cost.

[0072] Among them, after step S2, it also includes obtaining the distribution data of the explosion shock wave along the column height direction of the column 2 through the pressure sensor 8, and obtaining the overpressure time history curve of the explosion shock wave according to the distribution data; step S5 also includes obtaining the change relationship of the horizontal displacement of the column 2 with the total axial force and the explosion shock wave according to the horizontal displacement data, total axial force data, and overpressure time history curve of the explosion shock wave of the column 2.

[0073] Specifically, in step S4, the calculation formula for calculating the total axial force acting on the column 2 based on the axial strain data is:

[0074] N = d + G / 2;

[0075] where N is the total axial force acting on the column 2, E is the elastic modulus of the tie rod 5, A is the cross-sectional area of the tie rod 5, is the horizontal distance between the axis of the tie rod 5 and the reaction column 3, ε is the tensile strain of the tie rod 5 detected by the strain detection member 51, d is the horizontal distance from the column 2 to the reaction column 3, and G is the gravity of the cross beam 4.

[0076] It should be noted that other specific embodiments of the explosion test method for the column member of the present invention are substantially the same as those of the above-mentioned explosion test platform for a column member, and will not be elaborated herein.

[0077] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An explosion test platform for a column member, characterized in that It includes a base (1), a column (2), a reaction column (3), and a cross beam (4); the column (2) and the reaction column (3) are arranged at intervals on the base (1), one end of the cross beam (4) is connected to the upper part of the reaction column (3) in a rotatable up-and-down manner, and the other end of the cross beam (4) is arranged at the upper end of the column (2); A pull rod (5) for applying a downward acting force to the cross beam (4) is provided on the base (1), the pull rod (5) is located between the reaction column (3) and the column (2), and a strain detection member (51) for detecting the axial strain of the pull rod (5) is provided on the pull rod (5); A fixing member (6) spaced from the column (2) is fixedly connected to the base (1), and a displacement sensor (7) for detecting the horizontal displacement of the column (2) is provided on the fixing member (6); One end of the cross beam (4) away from the reaction column (3) is detachably connected to the end of the upper end of the column (2) by bolts; according to the strain of the pull rod (5) detected by the strain detection member (51), the lever principle, and Hooke's law, the axial force applied by the pull rod (5) to the end of the column (2) at different moments during the explosion test is calculated; the axial force applied by the pull rod (5) to the end of the column (2) at different moments is summed with the downward acting force applied by the cross beam (4) to the end of the column (2) to obtain the total axial force received by the column (2) at different moments; according to the total axial force and the test values of the displacement sensor (7) at different moments, the relationship between the deformation of the column (2) and the total axial force is obtained; The lower end of the pull rod (5) is fixedly connected to the base (1), a through hole matching the pull rod (5) is provided on the cross beam (4), and the upper end of the pull rod (5) passes through the through hole and is connected with a fixing block (52); An elastic member (53) is sleeved on the pull rod (5), and the elastic member (53) is located between the lower end surface of the fixing block (52) and the upper end surface of the cross beam (4); The strain detection member (51) is located below the cross beam (4); The elastic member (53) is a compression spring. Under the action of the explosion shock wave, the column (2) applies an axial pressure to the cross beam (4), the axial pressure is along the axis of the cross beam (4) and points to the reaction column (3), and under the action of the axial pressure, the middle part of the cross beam (4) bends downward, and the compression spring can continuously apply a downward acting force to the downwardly bent cross beam (4) during the action of the explosion load.

2. The explosion test platform for the column member according to claim 1, characterized in that, The fixing member (6) includes a first explosion-proof wall (61) and a second explosion-proof wall (62) arranged at intervals on the base (1), and the column (2) is arranged between the first explosion-proof wall (61) and the second explosion-proof wall (62); On one side of the first explosion-proof wall (61) opposite to the column (2), a connecting plate (65) is fixedly connected, and the other end of the connecting plate (65) is fixedly connected to one side of the second explosion-proof wall (62) opposite to the column (2); the displacement sensor (7) is arranged on the connecting plate (65), and the detection end of the displacement sensor (7) abuts against the side wall of the column (2).

3. The explosion test platform for the column member according to claim 2, characterized in that, A plurality of the connecting plates (65) are arranged at intervals along the axial direction of the column, and the displacement sensor (7) is arranged on each of the connecting plates (65).

4. The explosion test platform for the column member according to claim 2, characterized in that, On one side of the first explosion-proof wall (61) and / or the second explosion-proof wall (62) facing away from the reaction column (3), a pressure sensor (8) is arranged at a position close to the column (2), and a plurality of the pressure sensors (8) are arranged at intervals along the height direction of the column (2).

5. The explosion test platform for the column member according to claim 2, characterized in that, An elastic sealing body is filled between the first explosion-proof wall (61) and the column (2) and between the second explosion-proof wall (62) and the column (2).

6. The explosion test platform for the column member according to claim 2, characterized in that, One end of the first explosion-proof wall (61) away from the column (2) is provided with a first guard plate (63) extending towards the reaction column (3); one end of the second explosion-proof wall (62) away from the column (2) is provided with a second guard plate (64) extending towards the reaction column (3).

7. An explosion test method for a column member, characterized in that, Comprising the following steps Step S1. Construct an explosion test platform for the column member as described in any one of claims 1-6, and set an explosive (9) at a position separated from the column (2) by a set distance; Step S2. Detonate the explosive (9); Step S3. Obtain the axial strain data of the tie rod (5) during the explosion process through the strain detection member (51), and obtain the horizontal displacement data of the column (2) during the explosion process through the displacement sensor (7); Step S4. Calculate the total axial force acting on the column (2) according to the axial strain data; Step S5. Obtain the relationship between the horizontal displacement and the total axial force of the column (2) according to the horizontal displacement data of the column (2) and the total axial force data.

8. The explosion test method according to claim 7, characterized in that After the step S2, it further includes obtaining the distribution data of the explosion shock wave along the column height direction of the column (2) through the pressure sensor (8), and obtaining the overpressure time history curve of the explosion shock wave according to the distribution data; The step S5 further includes obtaining the variation relationship of the horizontal displacement of the column (2) with the total axial force and the explosion shock wave according to the horizontal displacement data of the column (2), the total axial force data, and the overpressure time history curve of the explosion shock wave.

9. The explosion test method according to claim 7, characterized in that In the step S4, the calculation formula for calculating the total axial force acting on the column (2) according to the axial strain data is: N = d + G / 2; Wherein, N is the total axial force acting on the column (2), E is the elastic modulus of the tie rod (5), A is the cross-sectional area of the tie rod (5), is the horizontal distance between the axis of the tie rod (5) and the reaction column (3), is the tensile strain of the tie rod (5) detected by the strain detection member (51), d is the horizontal distance from the column (2) to the reaction column (3), and G is the gravity of the cross beam (4).

Images