A simulation evaluation device and method for post-earthquake chemical erosion degree of concrete column

Abstract

The application discloses a kind of simulation evaluation device and method for post-earthquake concrete column chemical erosion degree, the device includes vibration platform, box, frame body and loading mechanism;The method includes the following steps: one, install the concrete sample to be measured;Two, give vibration intensity and carry out vibration test to the concrete sample to be measured;Three, inject fixed height fixed concentration chemical liquid in erosion cavity;Four, obtain the concrete sample after given vibration intensity disturbance and fixed concentration chemical liquid erosion;Five, replace test condition;Six, obtain the concrete sample after fixed vibration intensity disturbance and different concentration chemical liquid erosion;Seven, obtain the concrete sample after different vibration intensity disturbance and fixed concentration chemical liquid erosion;Eight, post-earthquake concrete sample chemical erosion degree evaluation.The application can evaluate the degree of post-earthquake concrete column chemical erosion, give effective remediation scheme, and can also provide construction basis for new chemical plant according to the type of chemical liquid.

Description

Technical Field

[0001] This invention belongs to the field of post-earthquake chemical erosion assessment technology, specifically relating to a simulation assessment device and method for the degree of chemical erosion of post-earthquake concrete columns. Background Technology

[0002] Chemical plants typically store large quantities of corrosive liquids of varying concentrations. After an earthquake, these liquids may leak out, initially eroding the concrete columns of the plant buildings and posing a risk of collapse. However, current assessments of post-earthquake chemical corrosion of concrete columns are lacking, making it difficult to develop remedial solutions. Furthermore, there are no effective methods for assessing the composition of concrete columns and the specific concentrations of chemical liquids they can withstand. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a simulation and evaluation device for the chemical erosion degree of concrete columns after earthquakes, which addresses the shortcomings of the prior art. The device has a novel and reasonable design, can evaluate the degree of chemical erosion of concrete columns after earthquakes, provide effective remedial solutions, and provide construction basis for new chemical plants according to the type of chemical liquid, making it easy to promote and use.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a simulation evaluation device for the chemical erosion degree of concrete columns after earthquake, characterized in that: it includes a vibration platform, a box set on the vibration platform for testing the chemical erosion of concrete samples, a frame set on the vibration platform for tightening and fixing the box, and a loading mechanism set on the top of the box. The chamber is a cubic chamber, comprising a bottom plate, a front side plate, a right side plate, a left side plate, a rear side plate, and a top plate. The internal space of the cubic chamber is divided into a sample holding chamber and an erosion chamber by a partition. An erosion window is provided on the partition. The concrete sample is placed in the sample holding chamber with one side attached to the partition, sealing the erosion window. The concrete sample is tightened by multiple clamping heads, with the end of the clamping head away from the concrete sample fixed to the chamber by fastening bolts. An inlet pipe communicating with the erosion chamber is provided on the left side plate, and an outlet pipe communicating with the erosion chamber is provided on the right side plate. A top plate through hole is provided on the top plate. The loading mechanism includes multiple support columns set on the top plate of the box body, a loading top plate is set on the top of the multiple support columns, a loader is installed at the bottom of the loading top plate, and the loading head of the loader passes through the through hole of the top plate and abuts against the top of the concrete sample.

[0005] The above-mentioned simulation and evaluation device for the chemical erosion of concrete columns after earthquake is characterized in that: the vibration platform includes a load-bearing base and a foundation plate set above the load-bearing base, the load-bearing base and the foundation plate are connected by multiple flexible pillars, a vibration pump is installed at the bottom of the foundation plate, multiple limiting plates are set on the load-bearing base outside the multiple flexible pillars, a platform base plate is fixedly set on the foundation plate, and the box and frame are both fixed on the platform base plate.

[0006] The above-mentioned simulation and evaluation device for the chemical erosion of post-earthquake concrete columns is characterized in that: the frame includes multiple columns, the top of the multiple columns is provided with a ring beam, the ring beam is provided with an adjustable clamp, and each corner of the box is provided with a clamp plate, which is connected to the ring beam through the clamp.

[0007] The above-mentioned simulation and evaluation device for the chemical erosion of post-earthquake concrete columns is characterized in that: the height of the inlet pipe is higher than that of the outlet pipe, the inlet pipe is connected to the storage tank of the chemical liquid to be tested, and the outlet pipe is connected to the liquid recovery tank.

[0008] The above-mentioned simulation and evaluation device for the chemical erosion degree of post-earthquake concrete columns is characterized in that: the inner walls of the box and the partition plate corresponding to the erosion chamber are coated with an anti-corrosion layer.

[0009] Meanwhile, this invention also discloses a method that is simple in procedure, reasonably designed, and capable of simulating and evaluating the chemical erosion degree of concrete columns after an earthquake. The method is characterized by the following steps: Step 1: Install the concrete sample to be tested and determine the loading load of the loading mechanism; Step 2: Given a vibration intensity, conduct a vibration test on the concrete sample to be tested using a vibration platform. Step 3: Inject a chemical liquid of fixed height and concentration into the erosion cavity; Step 4: After the test period ends, obtain concrete samples after erosion by chemical liquid with a given vibration intensity and a fixed concentration, and recover the used chemical liquid; Step 5: Change test conditions: When it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 6; when it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 7. Step Six: Obtain concrete samples after being subjected to fixed vibration intensity interference and chemical liquid erosion of different concentrations. The process is as follows: Step 601: Replace the concrete sample to be tested and determine the loading load of the loading mechanism; Step 602: Given a vibration intensity, conduct a vibration test on the concrete sample to be tested using a vibration platform. Step 603: Change the concentration of the chemical liquid and inject a fixed height of the chemical liquid of the new concentration into the erosion cavity; Step 604: After the test time is over, obtain concrete samples after the given vibration intensity interference and the chemical liquid of the changed concentration has been eroded, and recover the used chemical liquid. Step 605: Repeat steps 601 to 604 multiple times to obtain concrete samples after fixed vibration intensity interference and chemical liquid erosion of different concentrations, until the chemical liquid erosion test of different concentrations is completed. Step 7: Obtain concrete samples after being subjected to vibration at different intensities and chemical liquid erosion at a fixed concentration. The process is as follows: Step 701: Replace the concrete sample to be tested and determine the loading load of the loading mechanism; Step 702: Adjust the vibration intensity and conduct a vibration test on the concrete sample to be tested through a vibration platform; Step 703: Inject a chemical liquid of fixed height and fixed concentration into the erosion cavity; Step 704: After the test time is over, obtain the concrete sample after the adjusted vibration intensity interference and the chemical liquid erosion of a fixed concentration, and recycle the used chemical liquid. Step 705: Repeat steps 701 to 704 multiple times to obtain concrete samples after chemical liquid erosion with different vibration intensity interference and fixed concentration until the chemical liquid erosion test under different vibration intensity is completed. Step 8: Post-earthquake chemical erosion assessment of concrete samples. The erosion assessment method is the same for each concrete sample after vibration and chemical liquid erosion. The procedure for assessing the degree of erosion of any concrete sample subjected to vibration and chemical liquid erosion is as follows: Step 801: Starting from the direction of the eroded surface of the concrete sample, the concrete sample after being disturbed by vibration and chemical liquid erosion is sliced ​​for the first time. The thickness of the first slice is D1. Multiple electron microscopy scanning specimens are uniformly obtained from the inner surface of the first sliced ​​sample for electron microscopy scanning. Step 802: Determine whether the concrete sample has been subjected to first-level erosion. If none of the electron microscope scanned specimens cut off in the first step are eroded, the concrete sample is considered to have been subjected to first-level erosion, and the surface of the corresponding post-earthquake concrete column will be repaired later. If any of the electron microscope scanned specimens cut off in the first step are eroded, proceed to step 803. Step 803: Starting from the direction of the eroded surface of the concrete sample, a second slice is made on the concrete sample after the slice in step 801. The thickness of the second slice is D2. Multiple electron microscope scanning specimens are uniformly obtained on the inner surface of the second sliced ​​sample for electron microscope scanning. Step 804: Determine whether the concrete sample has been subjected to secondary corrosion. If the second cut electron microscope scan specimens are not corroded, the concrete sample is considered to have been subjected to secondary corrosion, and the corresponding post-earthquake concrete column will be repaired later. If the second cut electron microscope scan specimens are corroded, proceed to step 805. Step 805: Starting from the direction of the eroded surface of the concrete sample, the concrete sample after slicing in step 803 is sliced ​​for the third time. The thickness of the third slice is D3. Multiple electron microscope scanning specimens are uniformly obtained from the inner surface of the sample cut in the third step for electron microscope scanning. Where D1+D2+D3=aD, D is the thickness of the concrete sample, a is the proportionality coefficient and 0.25≤a≤0.33. Step 806: Determine whether the concrete sample has been subjected to third-degree erosion. If the third cut electron microscope scan specimens are not eroded, the concrete sample is considered to have been subjected to third-degree erosion, and the corresponding post-earthquake concrete column will be reinforced and repaired in the later stage. If the third cut electron microscope scan specimens are eroded, the corresponding post-earthquake concrete column will be destroyed and discarded.

[0010] The above method is characterized in that: the value range of the first slice thickness D1 is 0.2mm to 0.3mm; and the value range of the second slice thickness D2 is 0.1D≤D2≤0.2D.

[0011] The above method is characterized in that: before implementing step one, the temperature and humidity of the laboratory test environment are determined.

[0012] The method described above is characterized in that: the inner walls of the box and the box partition corresponding to the erosion cavity are coated with an anti-corrosion layer.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The device used in this invention can meet the earthquake simulation effect of different vibration intensities by setting up a vibration platform. By setting a loading mechanism on the top of the concrete sample to simulate the actual load-bearing effect of the concrete column, the concrete sample is subjected to a pre-vibration disturbance, which is consistent with the actual environment and has a good effect.

[0014] 2. The device used in this invention has an erosion window on the partition of the box. The chemical liquid erodes the concrete sample through the erosion window, and the test cost is reduced by conducting a single-sided test.

[0015] 3. The method adopted in this invention is simple in steps. First, the concrete sample to be tested is installed and the loading load of the loading mechanism is determined to simulate the actual scenario. A vibration intensity is given and a vibration test is conducted on the concrete sample to be tested through a vibration platform to achieve a pre-vibration disturbance to the concrete sample, which is close to the actual situation. A chemical liquid of a fixed height and a fixed concentration is injected into the erosion chamber to obtain the concrete sample after erosion by a given vibration intensity disturbance and a fixed concentration of chemical liquid. By changing the test conditions, concrete samples after erosion by a fixed vibration intensity disturbance and a different concentration of chemical liquid, as well as concrete samples after erosion by a different vibration intensity disturbance and a fixed concentration of chemical liquid, can be obtained. The device is fully functional. In actual implementation, this simulation evaluation device is small in size, low in cost, and can be mass-produced. It can perform multiple tests simultaneously, saving test time and meeting the evaluation of the chemical erosion degree of post-earthquake concrete columns under various working conditions, which is convenient for promotion and use.

[0016] In summary, this invention is novel and reasonable in design, capable of assessing the degree of chemical erosion of concrete columns after an earthquake, providing effective remedial solutions, and providing construction guidelines for new chemical plants based on the type of chemical liquid, thus facilitating its widespread use.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the device used in this invention.

[0019] Figure 2 for Figure 1 A front view of the enclosure after removing the front side panel and the front limiting plate.

[0020] Figure 3 for Figure 1 A structural diagram showing the structure after removing the rear side panel and the rear limiting plate of the enclosure.

[0021] Figure 4 for Figure 1 A top view of the enclosure without the top panel and its superstructure.

[0022] Figure 5 for Figure 4 A schematic diagram of the structure for removing the concrete sample.

[0023] Figure 6 This is a schematic diagram of the thickness slice of the concrete sample of the present invention.

[0024] Figure 7 This is a flowchart of the method used in this invention.

[0025] Explanation of reference numerals in the attached figures: 1—Load-bearing base; 2—Limiting plate; 3—Base plate; 4—Platform base plate; 5—Column; 6—Ring beam; 7—Bottom plate of the enclosure; 8—Front side panel of the enclosure; 9—Right side panel of the enclosure; 10—Left side panel of the enclosure; 11—Rear side panel of the enclosure; 12—Top panel of the enclosure; 13—Top plate through hole; 14—Box body partition; 15—Liquid inlet pipe; 16—Discharge pipe; 17—Fastening bolt; 18—Clamp; 19—Clamping plate; 20—Support column; 21—Loading top plate; 22—Loader; 23—Loading Head; 24—Erosion Window; 25—Flexible support; 26—Vibration pump; 27—Tightening head; 28—Concrete specimen; 29—Specimen holding cavity; 30—Erosion cavity; 31—Centerline in the thickness direction of the concrete sample. Detailed Implementation

[0026] like Figures 1 to 5 As shown, the present invention provides a simulation and evaluation device for the chemical erosion degree of a concrete column after an earthquake, comprising a vibration platform, a box set on the vibration platform for chemical erosion testing of a concrete sample 28, a frame set on the vibration platform for tightening and fixing the box, and a loading mechanism set on the top of the box. The box is a cubic box, which includes a bottom plate 7, a front side plate 8, a right side plate 9, a left side plate 10, a rear side plate 11, and a top plate 12. The internal space of the cubic box is divided into a sample holding chamber 29 and an erosion chamber 30 by a partition 14. An erosion window 24 is provided on the partition 14. A concrete sample 28 is placed in the sample holding chamber 29 with one side attached to the partition 14 and the erosion window 24 is blocked. The concrete sample 28 is tightened by multiple clamping heads 27. The end of the clamping head 27 away from the concrete sample 28 is fixedly connected to the box by a fastening bolt 17. An inlet pipe 15 communicating with the erosion chamber 30 is provided on the left side plate 10, and an outlet pipe 16 communicating with the erosion chamber 30 is provided on the right side plate 9. A top plate through hole 13 is provided on the top plate 12. The loading mechanism includes multiple support columns 20 set on the top plate 12 of the box body, a loading top plate 21 is set on the top of the multiple support columns 20, a loader 22 is installed at the bottom of the loading top plate 21, and the loading head 23 of the loader 22 passes through the through hole 13 of the top plate and abuts against the top of the concrete sample 28.

[0027] In this embodiment, the vibration platform includes a load-bearing base 1 and a base plate 3 disposed above the load-bearing base 1. The load-bearing base 1 and the base plate 3 are connected by multiple flexible support columns 25. A vibration pump 26 is installed at the bottom of the base plate 3. Multiple limiting plates 2 are disposed on the load-bearing base 1 outside the multiple flexible support columns 25. A platform base plate 4 is fixedly disposed on the base plate 3. The box and the frame are both fixed on the platform base plate 4.

[0028] In this embodiment, the frame includes multiple columns 5, with a ring beam 6 on the top of each column 5. An adjustable clamp 18 is provided on the ring beam 6, and clamps 19 are provided on the outer edges of each corner of the box. The clamps 19 are connected to the ring beam 6 through the clamps 18.

[0029] In this embodiment, the height of the inlet pipe 15 is higher than that of the outlet pipe 16. The inlet pipe 15 is connected to the storage tank of the chemical liquid to be tested, and the outlet pipe 16 is connected to the liquid recovery tank.

[0030] In this embodiment, the inner walls of the box and the box partition 14 corresponding to the erosion cavity 30 are coated with an anti-corrosion layer.

[0031] like Figure 7 The method for simulating and assessing the chemical erosion of concrete columns after an earthquake, as shown, includes the following steps: Step 1: Install the concrete sample 28 to be tested and determine the loading load of the loading mechanism; Step 2: Given a vibration intensity, conduct a vibration test on the concrete sample 28 to be tested using a vibration platform. Step 3: Inject a chemical liquid of fixed height and fixed concentration into the erosion cavity 30; Step 4: After the test period ends, obtain concrete samples after erosion by chemical liquid with a given vibration intensity and a fixed concentration, and recover the used chemical liquid; Step 5: Change test conditions: When it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 6; when it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 7. Step Six: Obtain concrete samples after being subjected to fixed vibration intensity interference and chemical liquid erosion of different concentrations. The process is as follows: Step 601: Replace the concrete sample 28 to be tested and determine the loading load of the loading mechanism; Step 602: Given a vibration intensity, conduct a vibration test on the concrete sample 28 to be tested using a vibration platform. Step 603: Change the concentration of the chemical liquid and inject a fixed height of the chemical liquid of the new concentration into the erosion chamber 30. Step 604: After the test time is over, obtain concrete samples after the given vibration intensity interference and the chemical liquid of the changed concentration has been eroded, and recover the used chemical liquid. Step 605: Repeat steps 601 to 604 multiple times to obtain concrete samples after fixed vibration intensity interference and chemical liquid erosion of different concentrations, until the chemical liquid erosion test of different concentrations is completed. Step 7: Obtain concrete samples after being subjected to vibration at different intensities and chemical liquid erosion at a fixed concentration. The process is as follows: Step 701: Replace the concrete sample 28 to be tested and determine the loading load of the loading mechanism; Step 702: Adjust the vibration intensity and conduct a vibration test on the concrete sample 28 to be tested through a vibration platform; Step 703: Inject a chemical liquid of fixed height and fixed concentration into the erosion cavity 30; Step 704: After the test time is over, obtain the concrete sample after the adjusted vibration intensity interference and the chemical liquid erosion of a fixed concentration, and recycle the used chemical liquid. Step 705: Repeat steps 701 to 704 multiple times to obtain concrete samples after chemical liquid erosion with different vibration intensity interference and fixed concentration until the chemical liquid erosion test under different vibration intensity is completed. Step 8: Post-earthquake chemical erosion assessment of concrete samples. The erosion assessment method is the same for each concrete sample after vibration and chemical liquid erosion. The procedure for assessing the degree of erosion of any concrete sample subjected to vibration and chemical liquid erosion is as follows: Step 801: Starting from the direction of the eroded surface of concrete sample 28, the concrete sample after being disturbed by vibration and chemical liquid is sliced ​​for the first time. The thickness of the first slice is D1. Multiple electron microscopy scanning specimens are uniformly obtained on the inner surface of the first sliced ​​sample for electron microscopy scanning. Step 802: Determine whether the concrete sample 28 has been subjected to first-level erosion. If none of the electron microscope scanned specimens cut out in the first step are eroded, the concrete sample 28 is considered to have been subjected to first-level erosion, and the surface of the corresponding post-earthquake concrete column will be repaired later. If any of the electron microscope scanned specimens cut out in the first step are eroded, proceed to step 803. Step 803: Starting from the direction of the eroded surface of concrete sample 28, a second slice is made on the concrete sample after slicing in step 801. The thickness of the second slice is D2. Multiple electron microscopy scanning specimens are uniformly obtained on the inner surface of the second sliced ​​sample for electron microscopy scanning. Step 804: Determine whether concrete sample 28 has been subjected to secondary corrosion. If the second cut electron microscope scan specimens are not corroded, it is considered that concrete sample 28 has been subjected to secondary corrosion, and the corresponding post-earthquake concrete column will be repaired later. If the second cut electron microscope scan specimens are corroded, proceed to step 805. Step 805: Starting from the eroded surface of the concrete sample 28, a third slice is made on the concrete sample after the slice in step 803. The thickness of the third slice is D3. Multiple electron microscope scanning specimens are uniformly obtained on the inner surface of the third sliced ​​sample for electron microscope scanning. Where D1+D2+D3=aD, D is the thickness of the concrete sample 28, and a is a proportionality coefficient and 0.25≤a≤0.33. Step 806: Determine whether the concrete sample 28 has been subjected to third-degree erosion. If the third cut electron microscope scan specimens are not eroded, the concrete sample 28 is considered to have been subjected to third-degree erosion, and the corresponding post-earthquake concrete column will be reinforced and repaired in the later stage. If the third cut electron microscope scan specimens are eroded, the corresponding post-earthquake concrete column will be destroyed and discarded.

[0032] In this embodiment, the first slice thickness D1 ranges from 0.2mm to 0.3mm; the second slice thickness D2 ranges from 0.1D ≤ D2 ≤ 0.2D.

[0033] In this embodiment, before implementing step one, the temperature and humidity of the laboratory test environment are determined.

[0034] In use, this invention allows for earthquake simulation effects of varying vibration intensities by setting up a vibration platform. A loading mechanism on top of the concrete sample simulates the actual load-bearing effect of a concrete column, pre-vibrating the concrete sample to induce vibration interference, thus mimicking the real environment. Erosion windows are provided on the box-type partition, allowing chemical liquids to erode the concrete sample. Single-sided testing reduces testing costs. In practice, the concrete sample to be tested is first installed, and the loading load of the loading mechanism is determined to simulate the actual scenario. A given vibration intensity is then applied to the concrete sample via the vibration platform, pre-vibrating the sample to induce vibration interference, closely approximating real-world conditions. The erosion chamber is then filled with... This device introduces a chemical liquid at a fixed height and concentration to obtain concrete samples after erosion under a given vibration intensity and concentration. By changing the test conditions, it can obtain concrete samples after erosion under different concentrations of chemical liquid and different vibration intensities. It is fully functional, and in practical applications, this simulation and evaluation device is small in size, low in cost, and can be mass-produced. It can perform multiple tests simultaneously, saving testing time and meeting the assessment requirements for the chemical erosion degree of post-earthquake concrete columns under various working conditions. It can assess the degree of chemical erosion of post-earthquake concrete columns, provide effective remedial solutions, and provide construction basis for new chemical plants based on the type of chemical liquid.

[0035] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns, characterized in that: The chemical erosion of concrete columns after earthquake is simulated and evaluated using a simulation evaluation device for chemical erosion of concrete columns after earthquake. The simulation evaluation device for chemical erosion of concrete columns after earthquake includes a vibration platform, a box set on the vibration platform for testing the chemical erosion of concrete samples (28), a frame set on the vibration platform for tightening and fixing the box, and a loading mechanism set on the top of the box. The box is a cubic box, which includes a bottom plate (7), a front side plate (8), a right side plate (9), a left side plate (10), a rear side plate (11), and a top plate (12). The internal space of the cubic box is divided into a sample holding chamber (29) and an erosion chamber (30) by a partition (14). An erosion window (24) is provided on the partition (14). The concrete sample (28) is placed in the sample holding chamber (29) with one side attached to the sample. The erosion window (24) is sealed on the partition plate (14) of the box body. The concrete sample (28) is tightened by multiple clamping heads (27). The end of the clamping head (27) away from the concrete sample (28) is fixedly connected to the box body by fastening bolts (17). An inlet pipe (15) communicating with the erosion chamber (30) is provided on the left side plate (10) of the box body. An outlet pipe (16) communicating with the erosion chamber (30) is provided on the right side plate (9) of the box body. A top plate through hole (13) is opened on the top plate (12) of the box body. The loading mechanism includes multiple support columns (20) set on the top plate (12) of the box body, a loading top plate (21) is set on the top of the multiple support columns (20), a loader (22) is installed at the bottom of the loading top plate (21), and the loading head (23) of the loader (22) passes through the through hole (13) of the top plate and abuts against the top of the concrete sample (28); The height of the inlet pipe (15) is higher than that of the outlet pipe (16). The inlet pipe (15) is connected to the storage tank of the chemical liquid to be tested, and the outlet pipe (16) is connected to the liquid recovery tank. The method includes the following steps: Step 1: Install the concrete sample to be tested (28) and determine the loading load of the loading mechanism; Step 2: Given a vibration intensity, conduct a vibration test on the concrete sample (28) to be tested using a vibration platform; Step 3: Inject a chemical liquid of fixed height and fixed concentration into the erosion cavity (30); Step 4: After the test period ends, obtain concrete samples after erosion by chemical liquid with a given vibration intensity and a fixed concentration, and recover the used chemical liquid; Step 5: Change test conditions: When it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 6; when it is necessary to fix the vibration intensity interference and the concrete samples after being eroded by chemical liquids of different concentrations, proceed to step 7. Step Six: Obtain concrete samples after being subjected to fixed vibration intensity interference and chemical liquid erosion of different concentrations. The process is as follows: Step 601: Replace the concrete sample to be tested (28) and determine the loading load of the loading mechanism; Step 602: Given a vibration intensity, conduct a vibration test on the concrete sample (28) to be tested using a vibration platform; Step 603: Change the concentration of the chemical liquid and inject a fixed height of the chemical liquid of the changed concentration into the erosion cavity (30); Step 604: After the test time is over, obtain concrete samples after the given vibration intensity interference and the chemical liquid of the changed concentration, and recycle the used chemical liquid. Step 605: Repeat steps 601 to 604 multiple times to obtain concrete samples after fixed vibration intensity interference and chemical liquid erosion of different concentrations, until the chemical liquid erosion test of different concentrations is completed. Step 7: Obtain concrete samples after being subjected to vibration at different intensities and chemical liquid erosion at a fixed concentration. The process is as follows: Step 701: Replace the concrete sample to be tested (28) and determine the loading load of the loading mechanism; Step 702: Adjust the vibration intensity and conduct a vibration test on the concrete sample (28) to be tested through a vibration platform; Step 703: Inject a chemical liquid of fixed height and fixed concentration into the erosion cavity (30); Step 704: After the test time is over, obtain the concrete sample after the adjusted vibration intensity interference and the chemical liquid erosion of a fixed concentration, and recycle the used chemical liquid. Step 705: Repeat steps 701 to 704 multiple times to obtain concrete samples after chemical liquid erosion with different vibration intensity interference and fixed concentration until the chemical liquid erosion test under different vibration intensity is completed. Step 8: Post-earthquake chemical erosion assessment of concrete samples. The erosion assessment method is the same for each concrete sample after vibration and chemical liquid erosion. The procedure for assessing the degree of erosion of any concrete sample subjected to vibration and chemical liquid erosion is as follows: Step 801: Starting from the direction of the eroded surface of the concrete sample (28), the concrete sample after being disturbed by vibration and chemical liquid erosion is sliced ​​for the first time. The thickness of the first slice is D1. Multiple electron microscopy scanning specimens are uniformly obtained on the inner surface of the first sliced ​​sample for electron microscopy scanning. Step 802: Determine whether the concrete sample (28) is subject to first-level erosion. If the first cut electron microscope scan specimens are not eroded, the concrete sample (28) is considered to be subject to first-level erosion, and the surface of the corresponding post-earthquake concrete column will be repaired later. If the first cut electron microscope scan specimens are eroded, proceed to step 803. Step 803: Starting from the direction of the eroded surface of the concrete sample (28), the concrete sample after being sliced ​​in step 801 is sliced ​​a second time. The thickness of the second slice is D2. Multiple electron microscope scanning specimens are uniformly obtained on the inner surface of the second sliced ​​sample for electron microscope scanning. Step 804: Determine whether the concrete sample (28) is subject to secondary erosion. If the second cut electron microscope scan specimens are not eroded, the concrete sample (28) is considered to be subject to secondary erosion. The corresponding post-earthquake concrete column will be repaired later. If the second cut electron microscope scan specimens are eroded, proceed to step 805. Step 805: Starting from the direction of the eroded surface of the concrete sample (28), the concrete sample after slicing in step 803 is sliced ​​for the third time. The thickness of the third slice is D3. Multiple electron microscope scanning specimens are uniformly obtained on the inner surface of the sample cut in the third step for electron microscope scanning. Where D1+D2+D3=aD, D is the thickness of the concrete sample (28), a is the proportionality coefficient and 0.25≤a≤0.33; Step 806: Determine whether the concrete sample (28) is subject to third-degree erosion. If the third cut electron microscope scan specimens are not eroded, the concrete sample (28) is considered to be subject to third-degree erosion. The corresponding post-earthquake concrete column will be reinforced and repaired in the later stage. If the third cut electron microscope scan specimens are eroded, the corresponding post-earthquake concrete column will be destroyed and discarded.

2. The method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns according to claim 1, characterized in that: The vibration platform includes a load-bearing base (1) and a base plate (3) set above the load-bearing base (1). The load-bearing base (1) and the base plate (3) are connected by multiple flexible support columns (25). A vibration pump (26) is installed at the bottom of the base plate (3). Multiple limiting plates (2) are set on the load-bearing base (1) outside the multiple flexible support columns (25). A platform base plate (4) is fixedly set on the base plate (3). The box and the frame are both fixed on the platform base plate (4).

3. The method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns according to claim 1, characterized in that: The frame includes multiple columns (5), and a ring beam (6) is provided on the top of the multiple columns (5). An adjustable clamp (18) is provided on the ring beam (6). A clamp (19) is provided on each corner of the box body. The clamp (19) is connected to the ring beam (6) through the clamp (18).

4. The method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns according to claim 1, characterized in that: The inner walls of the box and the box partition (14) corresponding to the erosion cavity (30) are coated with an anti-corrosion layer.

5. A method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns according to claim 1, characterized in that: The first slice thickness D1 ranges from 0.2mm to 0.3mm; the second slice thickness D2 ranges from 0.1D to D2 to 0.2D.

6. A method for simulating and evaluating the chemical erosion degree of post-earthquake concrete columns according to claim 1, characterized in that: Before implementing step one, first determine the temperature and humidity of the laboratory test environment.

Images