Method for determining the anti-slip coefficient of high-strength bolted steel plate surface based on roughness

Abstract

The method for measuring the anti-slip coefficient of the surface of a high-strength bolt-connected steel plate based on roughness of the present invention belongs to the technical field of anti-slip coefficient detection. The present invention prepares several anti-slip test pieces with specific roughness values, and tests their anti-slip coefficients to obtain the corresponding relationship between the roughness value and the anti-slip coefficient. Then, a handheld surface roughness meter detects the maximum peak-to-valley height of the steel plate to be tested, and calculates the average maximum peak-to-valley height to obtain the roughness value of the steel plate to be tested, and finally uses a linear interpolation method to calculate the anti-slip coefficient corresponding to the roughness value. The method is simple, practical, and has strong operability. The present invention can be detected on the surface of a component entity, can effectively ensure the construction quality of the steel structure, and can be widely promoted and used in steel structure construction.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-slip coefficient detection, and specifically is a method for measuring the anti-slip coefficient of the surface of a high-strength bolt-connected steel plate based on roughness. Background Art

[0002] In the design and construction of steel structures, high-strength bolts are the main connection method, and the anti-slip coefficient of the friction surface is the key factor to ensure whether the friction-type high-strength bolts can play their role.

[0003] At present, the method for determining the anti-slip coefficient is to use the same process standard specimen method, that is, to conduct a tensile test of a group of shot blasting (sand blasting) specimens in the workshop and on site respectively. This method wastes steel, and there is a certain time difference in transporting from the workshop or site to the laboratory for tensile testing, and it may not be possible to obtain accurate data. If the accompanying specimen is lost, there is currently no effective detection method to verify the slip coefficient of the surface of the high-strength bolt-connected steel plate, which brings a series of problems to the quality control of steel structure construction. Summary of the invention

[0004] The object of the present invention is to provide a method for measuring the anti-slip coefficient of the surface of a high-strength bolt-connected steel plate based on roughness, so as to solve the above technical problems.

[0005] To this end, the present invention provides a method for measuring the surface anti-slip coefficient of a high-strength bolt-connected steel plate based on roughness, comprising the following steps:

[0006] S1. Prepare anti-slip test pieces with roughness values ​​of X1=25μm, X2=40μm, X3=70μm and X4=100μm, and test their anti-slip coefficients Y1, Y2, Y3 and Y4 respectively to form a corresponding relationship between the roughness value and the anti-slip coefficient;

[0007] S2. Prepare the testing equipment, prepare the steel plate to be tested, and calibrate the testing equipment;

[0008] S3. Arrange the measuring points on the surface of the steel plate to be measured;

[0009] S4. Detect the maximum peak-to-valley height of each measuring point on the steel plate surface;

[0010] S5. Calculate the average value of the maximum peak-to-valley heights of all measuring points, and the obtained average maximum peak-to-valley height value is the roughness value X of the steel plate to be measured;

[0011] S6. According to the correspondence between the roughness value and the anti-slip coefficient obtained in S1 and the roughness value X obtained in S5, the anti-slip coefficient Y corresponding to the roughness value X is calculated by linear interpolation.

[0012] Preferably, when the roughness value is between X1 and X2, the linear interpolation calculation formula is: Y=Y1+(Y2-Y1)×(X-X1) / (X2-X1).

[0013] Preferably, when the roughness value is between X2 and X3, the linear interpolation calculation formula is: Y=Y2+(Y3-Y2)×(X-X2) / (X3-X2).

[0014] Preferably, when the roughness value is between X3 and X4, the linear interpolation calculation formula is: Y=Y3+(Y4-Y3)×(X-X3) / (X4-X3).

[0015] Preferably, the corresponding relationship between the roughness value and the anti-slip coefficient in S1 is shown in Table 1:

[0016] Table 1. Corresponding relationship between roughness value and anti-slip coefficient obtained by anti-slip test

[0017] .

[0018] Preferably, the testing equipment prepared in S2 includes preparing a stylus instrument and a roughness comparison sample, wherein the stylus instrument is a diamond stylus that complies with ISO3274 standard and has good conditions as specified in ISO5436, the tip of the diamond stylus has a diameter variation of 5μm±1μm, and the roughness comparison sample complies with the requirements of ISO8503-1 and is in good maintenance condition without wear.

[0019] Preferably, the calibration detection equipment in S2 includes calibrating the stylus meter to zero, and detecting the roughness comparison sample block by the stylus meter to detect the sensitivity of the stylus meter. The deviation between the roughness detection value of the sample block and the marked value of the roughness comparison sample block should not be greater than the detection allowable deviation in Table 2. If the allowable deviation is exceeded, the stylus meter needs to be replaced.

[0020] Table 2. Sample roughness marking value and test tolerance

[0021] .

[0022] Preferably, the measuring points in S3 are arranged on the surface of the steel plate to be measured between adjacent bolt holes, and the measuring points and the bolt holes are arranged in a plum blossom shape.

[0023] Preferably, the distance between the measuring point and the bolt hole is not less than 20 mm, and the number of measuring points is not less than 10.

[0024] Preferably, preparing the steel plate to be tested in S2 includes cleaning the surface of the steel plate to be tested and ensuring that it is dry, so that its testing state is consistent with its use state.

[0025] Compared with the prior art, the characteristics and beneficial effects of the present invention are as follows: the present invention makes several anti-slip test pieces with specific roughness values, and tests their anti-slip coefficients to obtain the corresponding relationship between the roughness value and the anti-slip coefficient. Then, a handheld surface roughness meter detects the maximum peak-to-valley height of the steel plate to be tested, and calculates the average maximum peak-to-valley height to obtain the roughness value of the steel plate to be tested, and finally uses the linear interpolation method to calculate the anti-slip coefficient corresponding to the roughness value. The method is simple, practical, and highly operable. The present invention can be used to perform detection on the solid surface of the component, can effectively ensure the construction quality of the steel structure, and can be widely promoted and used in steel structure construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the measurement point arrangement of the steel plate to be tested.

[0027] Attached figure markings: 1-measuring point, 2-bolt hole, 3-steel plate to be tested. DETAILED DESCRIPTION

[0028] In order to make the technical means, innovative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0029] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present invention provides a method for measuring the anti-slip coefficient of the surface of a high-strength bolt-connected steel plate based on roughness, comprising the following steps:

[0033] S1. Make anti-slip specimens with roughness values ​​of X1=25μm, X2=40μm, X3=70μm and X4=100μm, and test their anti-slip coefficients Y1, Y2, Y3 and Y4 respectively to form the corresponding relationship between the roughness value and the anti-slip coefficient. For the test method, see Appendix B, Article B.0.7 of the "Standard for Acceptance of Steel Structure Construction Quality" GB50205-2020. The corresponding relationship between the roughness value and the anti-slip coefficient is shown in Table 1:

[0034] Table 1. Corresponding relationship between roughness value and anti-slip coefficient obtained by anti-slip test

[0035] .

[0036] S2. Prepare the testing equipment, prepare the steel plate 3 to be tested, and calibrate the testing equipment. The preparation of the testing equipment includes preparing a stylus meter and a roughness comparison sample, wherein the stylus meter is a diamond stylus that complies with the ISO3274 standard and has the good conditions specified in ISO5436. The tip of the diamond stylus has a diameter change of 5μm±1μm, and the roughness comparison sample complies with the requirements of ISO8503-1 and is in a good maintenance state without wear. The preparation of the steel plate 3 to be tested includes cleaning the water stains, oil stains, dust, particles, etc. on the surface of the steel plate 3 to be tested and ensuring that they are dry, so that the test state and the use state are consistent. The calibration of the testing equipment includes calibrating the stylus meter to zero, and detecting the roughness comparison sample through the stylus meter, detecting the sensitivity of the stylus meter, and the deviation between the roughness test value of the sample and the marked value of the roughness comparison sample should not be greater than the allowable deviation of the test in Table 2. If the allowable deviation is exceeded, the stylus meter needs to be replaced.

[0037] Table 2. Sample roughness marking value and test tolerance

[0038] .

[0039] S3, arrange the measuring points 1 on the surface of the steel plate 3 to be measured. The measuring points 1 are arranged according to the shape of the steel plate 3 to be measured and the bolt holes 2. Figure 1Taking the steel plate 3 to be tested as an example, the measuring points 1 are arranged on the surface of the steel plate 3 to be tested between adjacent bolt holes 2, and the measuring points 1 and the bolt holes 2 are arranged in a plum blossom shape. The spacing between the measuring points 1 and the bolt holes 2 is not less than 20 mm, and the number of measuring points 1 is not less than 10.

[0040] S4. Place the stylus instrument on the surface of the steel plate 3 to be tested, and detect the maximum peak-to-valley height of each measuring point 1 on the surface of the steel plate.

[0041] S5. Calculate the average value of the maximum peak-to-valley heights of all measuring points 1. The obtained average maximum peak-to-valley height value is the roughness value X of the steel plate 3 to be measured.

[0042] S6. According to the correspondence between the roughness value and the anti-slip coefficient obtained in S1 and the roughness value X obtained in S5, the anti-slip coefficient Y corresponding to the roughness value X is calculated by linear interpolation.

[0043] When the roughness value is between X1 and X2, the linear interpolation calculation formula is: Y = Y1 + (Y2-Y1) × (X-X1) / (X2-X1).

[0044] When the roughness value is between X2 and X3, the linear interpolation calculation formula is: Y = Y2 + (Y3-Y2) × (X-X2) / (X3-X2).

[0045] When the roughness value is between X3 and X4, the linear interpolation calculation formula is: Y = Y3 + (Y4-Y3) × (X-X3) / (X4-X3).

[0046] For example, when the detection roughness value X is 50, the anti-slip coefficient Y of the steel plate detection surface is: 0.35 + (0.4-0.35) × (50-40) ÷ (70-40) = 0.37.

[0047] The present invention obtains the anti-slip coefficient of the steel surface by measuring the surface roughness of the steel plate at the bolt node of the steel component on site. It can effectively control the quality of the steel structure construction process. Compared with the current detection method of tensile testing by processing accompanying test pieces, it avoids the uncertainty of accompanying test pieces, and can be detected on the structural entity, thereby improving the reliability of steel structure quality detection.

[0048] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for determining the anti-slip coefficient of the surface of high-strength bolted steel plates based on roughness, characterized in that The following steps are involved: S1. Prepare anti-slip test pieces with roughness values ​​of X1=25μm, X2=40μm, X3=70μm and X4=100μm, and test their anti-slip coefficients Y1, Y2, Y3 and Y4 respectively to form a corresponding relationship between the roughness value and the anti-slip coefficient; S2, preparing the testing equipment, including preparing a stylus instrument and a roughness comparison sample, preparing a steel plate to be tested (3), and calibrating the testing equipment; S3, arranging measuring points (1) on the surface of the steel plate (3) to be measured; the measuring points (1) are arranged on the surface of the steel plate (3) to be measured between adjacent bolt holes (2), and the measuring points (1) and the bolt holes (2) are arranged in a plum blossom shape; the spacing between the measuring points (1) and the bolt holes (2) is not less than 20 mm, and the number of the measuring points (1) is not less than 10; S4, detecting the maximum peak-to-valley height of each measuring point (1) on the surface of the steel plate; S5, calculating the average value of the maximum peak-to-valley heights of all the measuring points (1), and the obtained average maximum peak-to-valley height value is the roughness value X of the steel plate (3) to be measured; S6, according to the correspondence between the roughness value and the anti-slip coefficient obtained in S1 and the roughness value X obtained in S5, calculating the anti-slip coefficient Y corresponding to the roughness value X by linear interpolation; When the roughness value is between X1 and X2, the linear interpolation calculation formula is: Y = Y1 + (Y2-Y1) × (X-X1) / (X2-X1); When the roughness value is between X2 and X3, the linear interpolation calculation formula is: Y = Y2 + (Y3-Y2) × (X-X2) / (X3-X2); When the roughness value is between X3 and X4, the linear interpolation calculation formula is: Y = Y3 + (Y4-Y3) × (X-X3) / (X4-X3); Among them, the corresponding relationship between the roughness value and the anti-slip coefficient in S1 is as follows: X1=25μm, Y1=0.3; X2=40μm, Y2=0.35; X3=70μm, Y3=0.4; X4=100μm, Y4=0.

45.

2. The method for measuring the anti-slip coefficient of the surface of high-strength bolted steel plates based on roughness according to claim 1, characterized in that: The testing equipment prepared in S2 includes a stylus instrument and a roughness comparison sample. The stylus instrument is a diamond stylus that complies with ISO3274 standard and has the good conditions specified in ISO5436. The tip diameter of the diamond stylus is 5μm±1μm. The roughness comparison sample complies with the requirements of ISO8503-1 and is in good maintenance condition without wear.

3. The method for measuring the anti-slip coefficient of the surface of high-strength bolted steel plates based on roughness according to claim 1, characterized in that: The calibration and testing equipment in S2 includes calibrating the stylus meter to zero, and testing the roughness comparison sample with the stylus meter to test the sensitivity of the stylus meter. The deviation between the sample roughness test value and the roughness comparison sample marked value should not be greater than the following test allowable deviation. If the allowable deviation is exceeded, the stylus meter needs to be replaced: when the sample roughness marked value is 25μm, the test allowable deviation is 3μm; when the sample roughness marked value is 40μm, the test allowable deviation is 10μm; when the sample roughness marked value is 70μm, the test allowable deviation is 15μm; when the sample roughness marked value is 100μm, the test allowable deviation is 20μm.

4. The method for measuring the anti-slip coefficient of the surface of high-strength bolted steel plates based on roughness according to claim 1, characterized in that: The preparation of the steel plate (3) to be tested in S2 includes cleaning the surface of the steel plate (3) to be tested and ensuring that it is dry, so that the testing state and the use state are consistent.

Images