Corrosion profile steel and concrete bonding slip testing device and method

Abstract

The invention relates to the field of building structure tests, in particular to a corrosion profile steel and concrete bonding slippage testing device and method.The corrosion profile steel and concrete bonding slippage testing device comprises a frame, the bottom of the frame is connected with an earthquake simulation device used for installing a profile steel concrete testing piece, and I-shaped steel with the exposed upper portion is poured in the profile steel concrete testing piece; the middle part of the frame is connected with a contact device sleeved on a steel reinforced concrete test piece, the top of the frame is provided with a power device capable of ascending and descending, the lower side of the power device is connected with a locking device and a clamping device which are connected with the upper part of I-shaped steel, and the power device is provided with a slippage detection device. According to the device, the earthquake state of the steel reinforced concrete test piece can be simulated in a bonding slip experiment, and the bonding slip curve of the steel reinforced concrete test piece in the earthquake state can be effectively simulated.

Description

Technical Field

[0001] The invention relates to the field of building structure testing, and in particular to a device and method for testing the bonding and slippage of corrosion-type steel and concrete. Background Art

[0002] Bond-slip problem in steel-concrete structure. Bond-slip is important in nonlinear analysis of RC structures. Bond-slip performance test is an important method to establish bond-slip of steel-concrete. Existing test methods include pull-out test and beam test center tension test. The pull-out test uses a steel bar slot patch to measure the slip displacement of the steel bars at the loading end and free end of the specimen, and uses the bond stress-slip displacement (τ-s) curve to reflect the bond-slip performance of the specimen.

[0003] However, the existing stick-slip performance test device cannot achieve rapid connection of the loading end of the steel section when simulating the stick-slip performance between the corrosive steel section and concrete; and cannot simulate the stick-slip performance between the steel section and concrete under earthquake conditions. Summary of the invention

[0004] The purpose of the present invention is to provide a corrosion steel and concrete bonding slip test device and method, the device can realize the simulation of the seismic state of the steel concrete specimen under the bonding slip test, and can effectively simulate the bonding slip curve of the steel concrete specimen under the seismic state.

[0005] The technical solution of the present invention is: a corrosion steel and concrete adhesion slip test device, including a frame, the bottom of the frame is connected to an earthquake simulation device for installing a steel-concrete test piece, the interior of the steel-concrete test piece is cast with an I-shaped steel with an exposed upper part, the middle of the frame is connected to a contact device placed on the steel-concrete test piece, the top of the frame is installed with a power device that can be raised and lowered, the lower side of the power device is connected to a locking device and a clamping device connected to the upper part of the I-shaped steel, and a slip detection device is provided.

[0006] Furthermore, the earthquake simulation device includes a bottom tray and side panels fixed around the bottom of the frame, the inner walls of the side panels on the left and right sides are longitudinally slidably connected with transversely placed lateral hydraulic rods, and the lateral hydraulic rods are vertically slidably connected to the bottom tray; the inner walls of the side panels on the front and rear sides are transversely slidably connected with longitudinally placed forward hydraulic rods, and the forward hydraulic rods are vertically slidably connected to the bottom tray; a bottom plate is fixed between the lower parts of the side panels on the front and rear sides, and a vertical hydraulic rod is longitudinally slidably connected to the bottom plate, and the upper end of the vertical hydraulic rod is transversely slidably connected to the bottom surface of the bottom tray, and a fixing mechanism for connecting the steel concrete test piece is provided on the bottom tray.

[0007] Furthermore, the fixing mechanism includes adjustment grooves opened on the bottom tray and located on the left and right sides of the steel-concrete test piece, and the adjustment grooves are slidably connected with I-shaped sliding connectors, and the tops of the I-shaped sliding connectors are vertically penetrated with fastening bolts threadedly connected thereto, and the inner sides of the I-shaped sliding connectors are welded with clamps, and the clamps are penetrated with through pins for penetrating the steel-concrete test piece, and the ends of the through pins passing through the clamps are threaded with fixing nuts.

[0008] Furthermore, the contact device comprises a circular connection seat which is sleeved outside the steel concrete test piece, the four sides of the circular connection seat are fixedly connected to the frame via a fixing frame, and a contact airbag is installed on the inner wall of the circular connection seat.

[0009] Furthermore, the power device includes an inverted connecting frame, a top plate with a movable groove is fixed on the top of the frame, the connecting frame vertically penetrates the movable groove and extends to the bottom of the top plate, a connecting plate is fixed to the lower end of the connecting frame, a top hydraulic rod slidably connected to the top plate is vertically installed on the inner side of the top of the connecting frame, and a bottom hydraulic rod slidably connected to the top plate is vertically installed on the connecting plate.

[0010] Furthermore, the locking device includes a connecting shaft passing through the connecting disk, the connecting shaft is rotatably connected to the connecting disk and is driven to rotate by a driving mechanism, a locking ring is fixed to the lower end of the connecting shaft, a locking pin is fixed to the inner wall of the locking ring, and a snap-in groove for cooperating with the locking pin is provided on the upper side of the I-shaped steel.

[0011] Furthermore, a contact block is installed on the side surface of one of the locking pins, and a push switch electrically connected to the power source of the driving mechanism is installed on the inner side surface of the contact block.

[0012] Furthermore, the driving mechanism includes a driving gear fixed to the upper end of the connecting shaft, the driving gear is meshed with a driving gear, and the driving gear is connected to an output end of a motor mounted on a connecting disk.

[0013] Furthermore, the clamping device includes a plurality of vertical connecting rods fixed at intervals along the circumferential direction on the bottom surface of the connecting plate, the lower end of the vertical connecting rod is hinged with an inclined fixing rod, the fixing rod is hinged with a clamping block away from the vertical connecting rod, and a clamping hydraulic rod is hinged between the fixing rod and the vertical connecting rod; the bottom surface of the connecting plate is also vertically fixed with a suspension rod on the inner side of the lower end for installing a slip detection device.

[0014] A method for testing the bond slip between corroded steel and concrete, using a device for testing the bond slip between corroded steel and concrete, comprises the following steps: 1) Cast the steel-concrete test piece and cut the clamping groove on the exposed I-shaped steel part of the steel-concrete test piece; 2) Place the cast steel concrete test piece on the earthquake simulation device and fix it; 3) Adjust the height of the locking ring so that the locking ring is sleeved on the end of the I-shaped steel, and fine-tune the locking ring until the locking pin is parallel to the snap-in groove. Drive the locking ring to rotate through the driving mechanism so that the locking pin fits into the snap-in groove. 4) The clamping device contacts and clamps the I-shaped steel; 5) The earthquake simulation device works to simulate the earthquake shaking scene; 6) The top hydraulic rod and the bottom hydraulic rod work alternately to realize the load application in the direction perpendicular to the vertical load of the steel concrete test piece. The displacement collector in the slip detection device obtains the slip amount of the steel section and draws the stress-displacement curve.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The corrosion steel and concrete bonding slip test device and method can simulate the earthquake state of the steel concrete specimen under the bonding slip test by setting up an earthquake simulation device, and simulate the horizontal lateral force of the contact air bag on the steel concrete specimen, which can effectively simulate the bonding slip curve of the steel concrete specimen under the earthquake state.

[0016] 2. The corrosion steel and concrete bonding slip test device and method can realize vertical bidirectional tension and compression load test of steel concrete specimens by adjusting the working states of the top hydraulic rod and the bottom hydraulic rod provided on the power device.

[0017] 3. The corrosion steel and concrete adhesion slip test device and method can achieve docking between the clamping groove and the locking pin under the rotation of the motor through the clamping groove opened on the steel, which effectively improves the efficiency of rapid docking installation of the steel concrete test.

[0018] 4. The corrosion steel and concrete adhesion slip test device and method can achieve the docking between the clamping block and the I-shaped corrosion steel by setting a clamping device and driving the clamping hydraulic rod, thereby effectively improving the clamping stability of the I-shaped steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 The structure of the present invention is schematically shown Figure 2 ; Figure 3 The structure of the present invention is schematically shown Figure 3 ; Figure 4 For the present invention Figure 3 Schematic diagram of the cross section at point A; Figure 5 For the present invention Figure 3 Schematic diagram of the structure at B in the middle; In the figure: 1, frame; 2, earthquake simulation device; 201, side plate; 202, bottom plate; 203, lateral hydraulic rod; 204, connection frame; 205, vertical hydraulic rod; 206, forward hydraulic rod; 207, bottom tray; 208, adjustment slot; 210, I-shaped sliding connector; 211, fastening bolt; 212, clamping plate; 213, through pin; 214, fixing nut; 3, steel concrete test piece; 4, I-shaped steel; 401, clamping slot; 5, power device; 501, connection frame; 502, top hydraulic rod; 503, sliding block 1; 504, bottom hydraulic Rod; 505, connecting plate; 506, sliding block 2; 6, locking device; 601, connecting shaft; 602, locking ring; 603, locking pin; 604, fixing block; 605, contact block; 606, driving gear; 607, motor; 608, driving gear; 7, clamping device; 701, vertical connecting rod; 702, fixing rod; 703, clamping hydraulic rod; 704, clamping block; 705, suspension rod; 8, contact device; 801, fixing frame; 802, circular connecting seat; 803, contact airbag; 9, movable groove; 10, top plate; 11, slip detection device. DETAILED DESCRIPTION

[0020] In order to make the above features and advantages of the present invention more easily understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0021] refer to Figures 1 to 5 A corrosion steel and concrete adhesion slip test device comprises a frame 1, the bottom of the frame 1 is connected to an earthquake simulation device 2 for installing a steel-concrete test piece 3, the interior of the steel-concrete test piece 3 is cast with an I-shaped steel 4 with an exposed upper portion, the middle of the frame 1 is connected to a contact device 8 sleeved on the steel-concrete test piece 3, the top of the frame 1 is installed with a power device 5 that can be raised and lowered, the lower side of the power device 5 is connected to a locking device 6 and a clamping device 7 connected to the upper portion of the I-shaped steel 4, and a slip detection device 11 is provided.

[0022] In this embodiment, the earthquake simulation device 2 includes a bottom tray 207 and side panels 201 fixed around the bottom of the frame 1; the inner walls of the side panels 201 on the left and right sides are longitudinally slidably connected with a pair of transversely placed lateral hydraulic rods 203, and the left and right sides of the bottom tray 207 are fixed with a pair of vertically placed connection frames 204 (the long sides of the connection frames are vertical), and the output ends of the lateral hydraulic rods 203 are vertically slidably connected with the corresponding connection frames 204; A longitudinally placed positive hydraulic rod 206 is horizontally slidably connected to the middle of the inner wall of the side plate 201 at the front and rear sides, and a vertically placed connecting frame 204 (the long side of the connecting frame is vertical) is fixed to the middle of the front and rear sides of the bottom tray 207, and the output end of the positive hydraulic rod 206 is vertically slidably connected to the corresponding connecting frame 204; A pair of bottom plates 202 are fixed between the lower parts of the side plates 201 located at the front and rear sides, and a vertical hydraulic rod 205 is longitudinally slidably connected to each of the bottom plates 202, and the upper end of the vertical hydraulic rod 205 is transversely slidably connected to the bottom surface of the bottom tray 207. Specifically, the upper end of the vertical hydraulic rod 205 is transversely slidably connected to the bottom tray 207 through a connecting frame transversely fixed to the bottom surface of the bottom tray 207 (the direction of the long side of the connecting frame is transverse), and the lower end of the vertical hydraulic rod 205 is longitudinally slidably connected to the bottom plate 202 through a connecting frame longitudinally fixed on the bottom plate 202 (the direction of the long side of the connecting frame is longitudinal). Note: The transverse direction in the present invention is the left-right direction, the longitudinal direction is the front-back direction, and the vertical direction is the up-down direction.

[0023] The earthquake simulation device 2 can realize the simulation experiment of the bottom plate 202 under the earthquake state through the alternating operation of the lateral hydraulic rod 203, the connecting frame 204, the vertical hydraulic rod 205, and the forward hydraulic rod 206, and can effectively test the bonding and sliding performance of the steel-concrete components.

[0024] In this embodiment, the bottom tray 207 is also provided with a fixing mechanism for connecting the steel concrete test piece 3. Specifically, the fixing mechanism includes an adjustment slot 208 opened on the bottom tray 207 and located on the left and right sides of the steel concrete test piece 3, and the adjustment slots 208 are slidably connected with an I-shaped sliding connector 210, and the top of the I-shaped sliding connector 210 is vertically penetrated with a fastening bolt 211 threadedly connected thereto, and the inner side of the I-shaped sliding connector 210 is welded with a clamping plate 212, and the clamping plate 212 is penetrated with a pair of through pins 213 for horizontally penetrating the steel concrete test piece 3, and the ends of the through pins 213 passing through the clamping plate 212 are screwed with fixing nuts 214. After the through pin 213 penetrates the steel concrete test piece 3, it is clamped by the two clamping plates 212 through the fixing nuts 214, and the I-shaped sliding connector 210 can be locked by tightening the fastening bolts 211 downward, and finally the locking of the steel concrete test piece 3 is completed.

[0025] In this embodiment, the contact device 8 includes a circular connection seat 802 sleeved outside the steel concrete test piece 3, the four sides of the circular connection seat 802 are welded and fixed to the frame 1 through a fixing frame 801, and a contact airbag 803 is installed on the inner wall of the circular connection seat 802. After the contact airbag 803 is inflated, the steel concrete test piece 3 can apply a lateral force to the contact airbag 803 through the walking contact of the steel concrete test piece 3, effectively simulating the unstable lateral load under the earthquake state.

[0026] In this embodiment, the power device 5 includes a connecting frame 501, a top plate 10 is welded and fixed to the top of the frame 1, a pair of movable grooves 9 are opened on the top plate, the connecting frame 501 vertically penetrates the movable grooves 9 and extends to the bottom of the top plate 10, a connecting plate 505 is fixed at the lower end of the connecting frame 501, a top hydraulic rod 502 is vertically fixedly installed on the inner side of the top of the connecting frame 501, the top hydraulic rod 502 is located between the pair of movable grooves 9 and the lower end is slidably connected to the top plate 9, and a bottom hydraulic rod 504 is vertically fixedly installed on the connecting plate 505, the upper end of which is slidably connected to the top plate 9. The connecting plate 505 can be driven to move up and down by the top hydraulic rod 502 and the bottom hydraulic rod 504, which can facilitate the vertical pressurization and pulling test of the steel concrete test piece 3.

[0027] In this embodiment, in order to better realize the sliding connection between the top hydraulic rod 502, the bottom hydraulic rod 504 and the top plate, a sliding block 503 is fixed at the bottom of the top hydraulic rod 502 and is slidably connected to the top of the top plate, and a sliding block 506 is fixed at the top of the bottom hydraulic rod 504 and is slidably connected to the bottom of the top plate.

[0028] In this embodiment, the connecting frame 501 is in an inverted shape, which facilitates the top hydraulic rod 502 to perform loading operations.

[0029] In this embodiment, in order to achieve connection with the I-shaped steel 4 of the steel concrete test piece 3, the locking device 6 includes a connecting shaft 601 passing through the connecting plate 505 at the upper part, the connecting shaft 601 is rotatably connected to the connecting plate 505 through a connecting flange and driven to rotate by a driving mechanism, a locking ring 602 is fixed at the lower end of the connecting shaft 601, a plurality of locking pins 603 are fixed at intervals on the inner wall of the locking ring 602, and a clamping groove 401 for matching with the locking pin 603 is provided on the upper side surface of the I-shaped steel 4. By adjusting the locking ring 602 by the top hydraulic rod 502 and the bottom hydraulic rod 504, the locking pin 603 inside the locking ring 602 can be parallel to the clamping groove 401, and the driving of the driving mechanism can rotate the locking ring 602 and dock the locking pin 603 with the clamping groove 401.

[0030] In this embodiment, in order to drive the connecting shaft 601 to rotate, the driving mechanism includes a driving gear 606 fixed to the upper end of the connecting shaft 601, the driving gear 606 is meshed with a driving gear 608, and the driving gear 608 is connected to the output end of the motor 607 installed on the connecting disk 505.

[0031] In this embodiment, a contact block 605 is installed on the side of one of the locking pins, and a push switch electrically connected to the controller of the motor 607 is installed on the inner side of the contact block 605. When the contact block 605 contacts the steel section, the motor 607 stops running, and the docking operation of the locking device 6 is realized.

[0032] In this embodiment, the clamping device 7 includes a plurality of vertical connecting rods 701 fixed at intervals along the circumferential direction on the bottom surface of the connecting plate 605, the lower end of the vertical connecting rod 701 is hinged with an inclined fixed rod 702, the fixed rod 702 is hinged with a clamping block 704 away from the vertical connecting rod 701, a clamping hydraulic rod 703 is arranged between the fixed rod 702 and the vertical connecting rod 701, both ends of the clamping hydraulic rod 703 are hinged with the fixed rod 702 and the clamping hydraulic rod 703; the contact surface of the clamping block 704 and the corrosion steel adopts pin-type contact, which effectively improves the connection stability between the clamping device 7 and the corrosion steel.

[0033] In this embodiment, a suspension rod 705 for mounting the slip detection device 11 is vertically fixed to the bottom surface of the connection plate 605 at the inner side of the lower end.

[0034] A method for testing the bond slip between corroded steel and concrete, using a device for testing the bond slip between corroded steel and concrete, comprises the following steps: 1) Casting the steel-concrete test piece 3, and cutting a clamping groove 401 on the upper part of the exposed I-shaped steel 4 of the steel-concrete test piece 3; 2) Place the cast steel concrete test piece 3 on the bottom tray 207, adjust the I-shaped sliding connector 210 to place the cast test component on the bottom tray 207, pass the pin 213 through the steel concrete test piece 3, and tighten the fixing nuts 214 at both ends to complete the fixing of the steel concrete test piece 3; 3) Adjust the height of the locking ring 602 so that the locking ring 602 is sleeved on the end of the I-shaped steel 4, and fine-tune the locking ring 602 until the locking pin 603 is parallel to the clamping groove 401, and drive the locking ring 602 to rotate through the motor 607 so that the locking pin 603 is aligned with the clamping groove 401; 4) The clamping hydraulic rod 703 moves to contact and clamp the clamping block 704 with the I-shaped steel 4; 5) Alternating operation of the lateral hydraulic rod 203, the bottom hydraulic rod 205, and the forward hydraulic rod 206 simulates the earthquake shaking scenario; 6) The top hydraulic rod 502 and the bottom hydraulic rod 504 work alternately to realize the load application in the direction perpendicular to the vertical load of the steel concrete test piece 3. The displacement collector in the slip detection device 11 obtains the slip amount of the steel and draws a stress-displacement curve.

[0035] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, it does not require creative labor to design different forms of corrosion steel and concrete bond slip test devices and methods. Without departing from the principles and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A corrosion steel and concrete bond slip test device, comprising a frame (1), characterized in that: The bottom of the frame (1) is connected to an earthquake simulation device (2) for installing a steel-concrete test piece (3); an upper exposed I-shaped steel (4) is cast inside the steel-concrete test piece (3); a contact device (8) sleeved on the steel-concrete test piece (3) is connected to the middle of the frame (1); a lifting power device (5) is installed on the top of the frame (1); a locking device (6) and a clamping device (7) connected to the upper part of the I-shaped steel (4) are connected to the lower side of the power device (5); and a slip detection device (11) is provided.

2. The corrosion steel and concrete bonding slip test device according to claim 1 is characterized in that: The earthquake simulation device (2) comprises a bottom tray (207) and side panels (201) fixed around the bottom of the frame (1); the inner walls of the side panels (201) on the left and right sides are longitudinally slidably connected to lateral hydraulic rods (203) placed horizontally, and the lateral hydraulic rods (203) are vertically slidably connected to the bottom tray (207); the inner walls of the side panels (201) on the front and rear sides are transversely slidably connected to forward hydraulic rods (206) placed vertically, and the forward hydraulic rods (206) are vertically slidably connected to the bottom tray (207); a bottom plate (202) is fixed between the lower parts of the side panels (201) on the front and rear sides, a vertical hydraulic rod (205) is longitudinally slidably connected to the bottom plate (202), the upper end of the vertical hydraulic rod (205) is transversely slidably connected to the bottom surface of the bottom tray (207), and a fixing mechanism for connecting a steel concrete test piece (3) is provided on the bottom tray (207).

3. The corrosion steel and concrete bonding slip test device according to claim 2 is characterized in that: The fixing mechanism comprises adjustment grooves (208) formed on the bottom tray (207) and located on the left and right sides of the steel concrete test piece (3); the adjustment grooves (208) are slidably connected with I-shaped sliding connectors (210); a fastening bolt (211) threadedly connected thereto is vertically penetrated through the top of the I-shaped sliding connector (210); a clamping plate (212) is welded to the inner side surface of the I-shaped sliding connector (210); a through pin (213) for penetrating the steel concrete test piece (3) is penetrated through the clamping plate (212); and a fixing nut (214) is screwed to the end of the through pin (213) passing through the clamping plate (212).

4. A corrosion steel and concrete bond slip test device according to claim 1, 2 or 3, characterized in that: The contact device (8) comprises a circular connection seat (802) sleeved outside the steel concrete test piece (3), the four sides of the circular connection seat (802) being fixedly connected to the frame (1) via a fixing frame (801), and a contact air bag (803) being installed on the inner wall of the circular connection seat (802).

5. A corrosion steel and concrete bond slip test device according to claim 1, 2 or 3, characterized in that: The power device (5) comprises an inverted connecting frame (501), a top plate (10) with a movable groove (9) being fixed on the top of the frame (1), the connecting frame (501) vertically penetrates the movable groove (9) and extends to the bottom of the top plate (10), a connecting plate (505) is fixed at the lower end of the connecting frame (501), a top hydraulic rod (502) slidably connected to the top plate (9) is vertically installed on the inner side of the top of the connecting frame (501), and a bottom hydraulic rod (504) slidably connected to the top plate (9) is vertically installed on the connecting plate (505).

6. The corrosion steel and concrete bonding slip test device according to claim 5, characterized in that: The locking device (6) comprises a connecting shaft (601) passing through the connecting disk (505); the connecting shaft (601) is rotatably connected to the connecting disk (505) and driven to rotate by a driving mechanism; a locking ring (602) is fixed to the lower end of the connecting shaft (601); a locking pin (603) is fixed to the inner wall of the locking ring (602); and a clamping groove (401) for cooperating with the locking pin (603) is provided on the upper side surface of the I-shaped steel (4).

7. The corrosion steel and concrete bonding slip test device according to claim 6, characterized in that: A contact block (605) is installed on the side surface of one of the locking pins, and a push switch electrically connected to the power source of the drive mechanism is installed on the inner side surface of the contact block (605).

8. A corrosion steel and concrete bond slip test device according to claim 6 or 7, characterized in that: The driving mechanism comprises a driving gear (606) fixed to the upper end of the connecting shaft (601), the driving gear (606) meshing with a driving gear (608), and the driving gear (608) is connected to the output end of a motor (607) mounted on the connecting disk (505).

9. The corrosion steel and concrete bonding slip test device according to claim 5, characterized in that: The clamping device (7) comprises a plurality of vertical connecting rods (701) fixed to the bottom surface of the connecting plate (605) at intervals along the circumferential direction; the lower end of the vertical connecting rod (701) is hinged with a fixing rod (702) arranged obliquely; the fixing rod (702) is hinged with a clamping block (704) away from the vertical connecting rod (701); a clamping hydraulic rod (703) is hinged between the fixing rod (702) and the vertical connecting rod (701); and a suspension rod (705) for mounting a slip detection device (11) on the inner side of the lower end is also vertically fixed to the bottom surface of the connecting plate (605).

10. A method for testing the bond slip between corroded steel and concrete, using the device for testing the bond slip between corroded steel and concrete according to claim 6, 7 or 9, characterized in that: The following steps are involved: 1) casting a steel-concrete test piece (3), and cutting a clamping groove (401) at the exposed I-shaped steel (4) portion of the steel-concrete test piece (3); 2) placing the cast steel concrete test piece (3) on the earthquake simulation device (2) and fixing it; 3) adjusting the height of the locking ring (602) so that the locking ring (602) is sleeved on the end of the I-shaped steel (4), and fine-tuning the locking ring (602) until the locking pin (603) is parallel to the clamping groove (401), and driving the locking ring (602) to rotate through the driving mechanism so that the locking pin (603) is aligned with the clamping groove (401); 4) The clamping device (7) contacts and clamps the I-shaped steel (4); 5) The earthquake simulation device (2) works to simulate the earthquake shaking scene; 6) The top hydraulic rod (502) and the bottom hydraulic rod (504) work alternately to realize the load application in the direction perpendicular to the vertical load of the steel concrete test piece (3). The displacement acquisition instrument in the slip detection device (11) obtains the slip amount of the steel and draws a stress-displacement curve.

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