CN114166656A - Method for establishing joint shear strength weakening constitutive model based on three-dimensional morphology parameters - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000003313 weakening effect Effects 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 239000011435 rock Substances 0.000 claims abstract description 27
- 238000010008 shearing Methods 0.000 claims abstract description 16
- 230000000877 morphologic effect Effects 0.000 claims abstract description 5
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- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
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- 238000004088 simulation Methods 0.000 description 2
- 241001025261 Neoraja caerulea Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N1/00—Sampling; Preparing specimens for investigation
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- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention relates to a method for establishing a joint shear strength weakening constitutive model based on three-dimensional morphology parameters, which comprises the following steps: s1, preparing an artificial joint sample containing a natural rock joint surface; s2, carrying out a manual joint sample shearing test; s3, scanning the three-dimensional morphology of the joint surface after the shearing test, performing quantitative characterization on the three-dimensional morphology characteristics, and fitting a deterioration rule of the three-dimensional morphology in the shearing process; and S4, constructing a joint shear strength weakening constitutive model based on the three-dimensional morphology parameters. The shear strength weakening constitutive model of the rock joint established based on the three-dimensional morphological parameters has definite physical and mechanical significance, can accurately predict the post-peak shear strength of the joint, can provide a reliable rock joint model for numerical simulation software, and has important theoretical research significance and higher engineering application value for accurately evaluating the safety and stability of an engineering rock mass.
Description
Technical Field
The invention relates to a method for establishing a joint shear strength weakening constitutive model based on three-dimensional morphology parameters.
Background
In a joint shear test, a shear stress-shear displacement process curve often presents an obvious post-peak area form, the previous research mainly focuses on the influence of the topographic characteristics of a joint surface on the shear strength of a joint peak value, and the research on the weakening rule of the shear strength after the joint peak value is less. Meanwhile, in the extremely individual expression of the shear strength constitutive model after representing the joint peak, most model parameters have no clear physical and mechanical significance, and the weakening rule of the strength parameters of the joint in the shearing process cannot be accurately reflected.
Disclosure of Invention
The invention aims to provide a method for establishing a rock joint shear strength weakening constitutive model based on three-dimensional morphological parameters aiming at the defects of the existing rock joint shear strength weakening constitutive model.
In order to achieve the purpose, the invention adopts the following technical scheme:
the method for establishing the rock joint shear strength weakening constitutive model based on the three-dimensional morphology parameters comprises the following steps:
s1 preparation of artificial joint sample containing natural rock joint surface
The method comprises the steps of carrying out shape scanning on a natural rock joint surface by adopting a non-contact photographing type three-dimensional blue light scanner, carrying out post-processing on point cloud data obtained by scanning to obtain a three-dimensional numerical model of the joint surface, leading the numerical model into a 3D printer, printing out a joint surface mould by adopting high polymer material PLA, placing the joint surface mould into a mould box, raising the joint surface mould to the middle position of the mould box in the vertical direction by using a hard block pad, pouring a lower disc of a joint sample, then placing the lower disc of the joint sample into the mould box, and pouring an upper disc of the joint sample so as to ensure that the upper disc and the lower disc of the joint sample are completely coupled.
S2 shear test of manual joint sample
Carry out different normal stress, the direct shear test of different shear displacement to artifical joint sample to obtain the shear strength data of joint, the setting of different normal stress is confirmed through the unipolar compressive strength of material, the setting of different shear displacement is confirmed through peak value shear displacement and the residual shear displacement of direct shear test estimation earlier stage, shear test's shear rate sets up to 0.002mm/s, under in order to guarantee that the shearing process is in the pseudo-static state, also provide sufficient reaction time for in time stopping the experiment simultaneously.
S3, after each sample shear test is finished, scanning the three-dimensional morphology of the joint surface, and adopting a three-dimensional roughness parameter based on the Grassilli morphology parameter
Carrying out quantitative characterization on the three-dimensional morphology characteristics, wherein A0The maximum contact area ratio,
The maximum apparent dip angle and C are roughness parameters, and the deterioration rule of the three-dimensional morphology in the shearing process is fitted based on the parameters:
in the formula
And
respectively representing peak value and peak post-shearJoint three-dimensional roughness parameter, f (delta, sigma) of the cut positionn) Representing the sum of the shear displacement delta and the normal stress sigmanThe relevant attenuation function, the fitting equation of which is:
wherein L is the length of the joint, σnTo normal stress on joints, σcIs the uniaxial compressive strength of the material, D, n1、n2The parameters related to the joint sample represent the attenuation coefficient, the stress index and the displacement index respectively.
S4, the relation between the three-dimensional shape parameters of the joint surface and the joint shear strength is expressed by an equation as follows:
in the formula
For joint basic friction angle, JMC is joint fit coefficient, K1Is the pre-peak damage coefficient and is,
representing the three-dimensional roughness parameter, K, of the joint surface at the peak2Is a scaling factor.
K1、K2Mean normal stress sigmanCorrelation, there is therefore a coefficient K such that:
in the formula: a. b is an empirical coefficient associated with the joint face shear test.
Since the joint under study is initially fully coupled, assuming a joint face fit coefficient JMC of 1 at the peak, then there is:
constructing a joint shear strength weakening constitutive model based on three-dimensional morphology according to the degradation rule of the joint surface morphology in the post-peak shearing process and the relation between the degradation rule and the shear strength weakening, wherein the expression is as follows:
wherein JMC isrTo account for the fit coefficient at the post shear peak.
The invention has the beneficial effects that: the model parameters established based on the method have clear physical and mechanical significance, can visually reflect the degradation of the joint surface in the shearing process, can accurately predict the post-peak shear strength of the joint, can provide a reliable rock joint model for numerical simulation software, and has important theoretical research significance and higher engineering application value for accurately evaluating the safety and stability of the engineering rock mass.
Drawings
FIG. 1 is a three-dimensional numerical model diagram of a joint plane obtained by projecting a curved surface onto a plane;
FIG. 2 is a diagram of a joint face mold printed by introducing a three-dimensional numerical model into a 3D printer and using high-strength and wear-resistant polymer PLA as a printing raw material;
FIG. 3 is a diagram of a sample preparation for casting using high-strength gypsum as a rock simulation material;
FIG. 4 is a line graph of the variation trend of the three-dimensional roughness parameter of the joint surface with the post-peak shear displacement;
FIG. 5 is a graph of the fit coefficient of the joints at different post-peak shear displacements;
fig. 6 is a graph in which the post-peak shear strengths of joints under different normal stresses can be calculated in a joint shear strength weakening model based on three-dimensional morphology, and the calculated values are compared with the test values.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Method for establishing rock joint shear strength weakening constitutive model based on three-dimensional morphology, and S1 preparation of artificial joint sample
a. The method comprises the following steps of (1) carrying out shape scanning on a natural rock joint surface by using a non-contact photographing type three-dimensional blue-ray scanner, cleaning the joint surface before scanning, spraying a thin developer, and attaching mark points;
b. utilizing Geomagic post-processing software to perform point cloud data automatic splicing, data optimization and point cloud fusion on original data obtained by scanning to obtain synthesized point cloud data, packaging the synthesized point cloud data into a grid curved surface, and obtaining a three-dimensional numerical model of a joint surface in a mode of projecting the curved surface to a plane, wherein the three-dimensional numerical model is shown in figure 1;
c. guiding the three-dimensional numerical model of the joint surface into a 3D printer, and printing out a joint surface mold by using high-strength and wear-resistant high polymer material PLA as a printing raw material, as shown in FIG. 2;
d. high-strength gypsum is adopted as a rock simulation material for pouring, the water-cement ratio is selected to be 0.33 through blending, the gypsum material with the water-cement ratio is high in strength and suitable in thickness for pouring, a 3D printed joint surface mold is placed into a cubic test mold to pour a lower disc of a joint sample, then the poured joint sample lower disc is placed into the test mold to pour an upper disc, so that the upper disc and the lower disc of the joint sample are completely coupled, the prepared sample is shown in figure 3, and the basic physical and mechanical parameters of the artificial joint sample are shown in table 1;
TABLE 1
S2 shear test of manual joint sample
a. As shown in fig. 5, the testing was performed on an RMT-150C numerically controlled electric servo tester, whose main performance indexes were as follows: the maximum output of the vertical hydraulic cylinder is 1000kN, and the piston stroke is 50 mm; the maximum output of the horizontal hydraulic cylinder is 500kN, and the piston stroke is 50 mm; the deformation rate ranges from 0.0001 mm/s to 1mm/s, and the loading rate ranges from 0.01 kN/s to 100 kN/s;
b. the direct shear test sets 3 normal stress levels: 3. 5 and 8MPa, defining the shear displacement taking the peak shear displacement as the starting point and going backwards as the post-peak shear displacement, and finding through a previous test that when a joint sample is sheared to a position 5mm behind the peak, the shear strength of the joint basically reaches a residual value, so that 5 shear displacement end points are set at each normal stress level: peak shear displacement, 0.5mm, 1.5mm, 3mm, 5mm post peak;
c. the test is carried out according to the sequence from 5mm after the peak to the peak shear displacement, the test of the shear displacement end point after the peak only needs to record the position of the peak point in the test process to calculate the position of the end point, the test of the shear displacement end point at the peak needs to roughly judge the position of the end point according to the previous test condition and the change trend of a shear curve, the speed during shearing is set to be 0.002mm/s, the shear process is ensured to be in a pseudo-static state, and meanwhile, sufficient reaction time is provided;
d. the shear strength and the shear expansion angle of the joint at different shear displacement positions under different normal stresses are obtained through a test curve as shown in table 2, and the shear expansion angle is continuously changed due to abrasion damage on the joint surface in the shear expansion process, so that the shear expansion angle is expressed in an incremental form in the following formula and is obtained through the tangent slope of the shear expansion curve:
in the formula: dv is the vertical displacement increment and du is the horizontal displacement increment.
TABLE 2
S3, after each sample shear test is completed, the surface is loosened by a fine hairbrushCleaning up scraps and particles, scanning the three-dimensional appearance of the sheared joint surface, and adopting a three-dimensional roughness parameter based on the Grassilli appearance parameter
The three-dimensional morphology features are quantitatively characterized, and the change trend of the three-dimensional roughness parameters of the joint surface along with the post-peak shear displacement is shown in figure 4.
The degradation rule of the three-dimensional morphology in the shearing process is represented as:
in the formula
And
joint three-dimensional roughness parameter, f (delta, sigma), representing peak and post-peak shear positions, respectivelyn) Representing the sum of the shear displacement delta and the normal stress sigmanThe relevant attenuation function, the fitting equation of which is:
wherein L is the length of the joint, σnTo normal stress on joints, σcIs the uniaxial compressive strength of the material, D, n1、n2The parameters related to the joint sample represent the attenuation coefficient, the stress index and the displacement index respectively.
For the convenience of analysis, the three-dimensional roughness parameter variation trends under different normal stresses were normalized by setting the value of the three-dimensional roughness parameter at the peak to 1, as shown in table 3.
TABLE 3
D, n can be obtained by fitting the test data by least squares1、n254, 0.3 and 0.7 in sequence.
S4, the relation between the three-dimensional shape parameters of the joint surface and the joint shear strength is expressed by an equation as follows:
in the formula
For joint basic friction angle, JMC is joint fit coefficient, K1Is the pre-peak damage coefficient and is,
representing the three-dimensional roughness parameter, K, of the joint surface at the peak2Is a scaling factor.
K1、K2Mean normal stress sigmanCorrelation, there is therefore a coefficient K such that:
in the formula: a. b is an empirical coefficient associated with the joint face shear test.
Since the joint under study is initially fully coupled, assuming a joint face fit coefficient JMC of 1 at the peak, then there is:
and calculating the value of K under different normal stresses according to the test result, and obtaining the values of the empirical coefficients a and b which are respectively 1.3 and-0.24 through fitting.
Constructing a joint shear strength weakening model based on three-dimensional morphology according to the degradation rule of the joint surface morphology in the post-peak shearing process and the relation between the degradation rule and the shear strength weakening, wherein the expression is as follows:
the joint coefficient JMC of the joint surface at the shearing peak value is 1, and the coefficient K is not changed under the same normal stress, so that the joint coefficient JMC of the joint surface after the shearing peak valuerCan be expressed as:
in the formula: i.e. ipAnd irThe joint shear swell angles of the peak and post-peak shear locations, respectively.
Calculating the coincidence coefficient of joints under different peak post-shear displacements as shown in FIG. 5, and judging JMCrAnd the post-peak shear displacement delta, and the fitting parameter k is obtained by fitting, wherein the value of the fitting parameter k is-0.244 as shown in the expression formula.
JMCr＝ekδ
Mixing JMCr、K、f(δ,σn) And the related fitting parameters are substituted into the joint shear strength weakening model based on the three-dimensional morphology, so that the post-peak shear strength of joints under different normal stresses can be calculated, and the calculated value is compared with the test value, as shown in fig. 6, it can be seen that the post-joint-peak shear strength calculated by the model has higher goodness of fit with the test value, which shows that the post-joint-peak shear strength weakening model established based on the surface morphology characteristics of the joint surface and the correlation with the shear strength can better reflect the weakening process of the post-joint-peak shear section.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The method for establishing the joint shear strength weakening constitutive model based on the three-dimensional morphology parameters is characterized by comprising the following steps
S1, carrying out shape scanning on the natural rock joint surface, carrying out post-processing on point cloud data obtained by scanning to obtain a three-dimensional numerical model of the joint surface, introducing the numerical model into a 3D printer, printing out a joint surface mould by adopting high polymer material PLA, and pouring an artificial joint sample containing the natural rock joint surface by adopting rock similarity material through the mould;
s2, performing direct shear tests of different normal stresses and different shear displacements on the artificial joint test piece to obtain the shear strength data of the joint test piece;
s3, scanning the three-dimensional morphology of the joint surface after the shearing test, performing quantitative characterization on the three-dimensional morphology characteristics, and fitting a deterioration rule of the three-dimensional morphology in the shearing process;
s4, constructing a joint shear strength weakening model based on the three-dimensional morphology according to the relation between the three-dimensional morphology parameters of the joint surface and the joint shear strength.
2. The method for building a shear strength weakening constitutive model of rock joints based on three-dimensional topographic parameters as claimed in claim 1, wherein in step S1, the three-dimensional topographic scan is performed by using a non-contact photo three-dimensional blue light scanner, and the joint surface is cleaned, sprayed with a thin developer, and stuck with a mark point before the scan.
3. The method for building the shear strength weakening constitutive model of the rock joint based on the three-dimensional morphological parameters as claimed in claim 1, wherein in the step S1, the pouring of the artificial joint sample is specifically performed by:
and placing the joint surface die into the die box, raising the die box to the middle position in the vertical direction of the die box by using the hard block pad, pouring a lower disc of the joint sample, and then placing the lower disc of the joint sample into the die box to pour an upper disc of the joint sample so as to ensure that the upper disc and the lower disc of the joint sample are completely coupled.
4. The method for building the shear strength weakening constitutive model of the rock joint based on the three-dimensional morphological parameters as claimed in claim 1, wherein in the step S2, the setting of different normal stresses is determined by the uniaxial compressive strength of the material, the setting of different shear displacements is determined by the peak shear displacement and the residual shear displacement estimated by the earlier direct shear test, and the shear rate of the shear test is set to 0.002mm/S, so as to ensure that the shear process is in a pseudo-static state and provide sufficient reaction time for stopping the test in time.
5. The method for establishing the shear strength weakening constitutive model of the rock joint based on the three-dimensional morphological parameters as claimed in claim 1, wherein in the step S3, after each sample shear test is completed, the loose-surface chips and particles are cleaned by a fine hair brush.
6. The method for building the shear strength weakening constitutive model of rock joint based on the three-dimensional topographic parameters as claimed in claim 1, wherein in the step S3, the quantitative characterization of the three-dimensional topographic features adopts a three-dimensional roughness parameter based on Grassilli topographic parameters
Wherein A is0The maximum contact area ratio,
The maximum apparent dip angle and C are roughness parameters.
7. The method for building the shear strength weakening constitutive model of rock joint based on the three-dimensional morphology parameters as claimed in claim 1, wherein in the step S3, the deterioration rule of the three-dimensional morphology during the shearing process is represented as:
in the formula
And
the joint three-dimensional roughness parameters, f (delta, sigma), for the peak and post-peak shear positions, respectivelyn) Representing the sum of the shear displacement delta and the normal stress sigmanThe relevant attenuation function, the fitting equation of which is:
wherein L is the length of the joint, σnTo normal stress on joints, σcIs the uniaxial compressive strength of the material, D, n1、n2The parameters related to the joint sample represent the attenuation coefficient, the stress index and the displacement index respectively.
8. The method for building a rock joint shear strength weakening constitutive model based on three-dimensional topographic parameters as claimed in claim 1, wherein in the step S4, the relationship between the joint surface three-dimensional topographic parameters and the joint shear strength is expressed by the following equation:
in the formula
For joint basic friction angle, JMC is joint fit coefficient, K1Is the pre-peak damage coefficient and is,
representing the three-dimensional roughness parameter, K, of the joint surface at the peak2Is a scaling factor.
K1、K2Mean normal stress sigmanCorrelation, there is therefore a coefficient K such that:
in the formula: a. b is an empirical coefficient associated with the joint face shear test.
Since the joint under study is initially fully coupled, assuming a joint face fit coefficient JMC of 1 at the peak, then there is:
9. the method for building the shear-strength weakening constitutive model of rock based on the three-dimensional topographic parameters as claimed in claim 1, wherein in the step S4, the expression of the shear-strength weakening constitutive model of rock based on the three-dimensional topographic parameters is as follows:
wherein JMC isrTo account for the fit coefficient at the post shear peak.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115587443A (en) * | 2022-10-14 | 2023-01-10 | 北京建筑大学 | Method and device for determining roughness of rock joint surface, electronic equipment and medium |
| CN115930847A (en) * | 2022-09-30 | 2023-04-07 | 中国科学院武汉岩土力学研究所 | Quantitative determination method for roughness evaluation index of three-dimensional structure surface |
| CN115935460A (en) * | 2022-10-14 | 2023-04-07 | 北京建筑大学 | Method and equipment for predicting rock joint rate-related peak shear strength |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108446431A (en) * | 2018-02-06 | 2018-08-24 | 中国地质大学（武汉） | Rock structural face shear strength anisotropy evaluation method |
| CN109885980A (en) * | 2019-03-29 | 2019-06-14 | 中南大学 | Determine that Complete Damage Process constitutive model is sheared at the joint of yield point based on stress difference |
-
2021
- 2021-05-25 CN CN202110568705.3A patent/CN114166656B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108446431A (en) * | 2018-02-06 | 2018-08-24 | 中国地质大学（武汉） | Rock structural face shear strength anisotropy evaluation method |
| CN109885980A (en) * | 2019-03-29 | 2019-06-14 | 中南大学 | Determine that Complete Damage Process constitutive model is sheared at the joint of yield point based on stress difference |
Non-Patent Citations (3)
| Title |
|---|
| N. BARTON: "The shear strength of rock and rock joints", INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS, vol. 13, no. 9, pages 255 - 279 * |
| YANG GUI 等: "A New Method for 3D Modeling of Joint Surface Degradation and Void Space Evolution Under Normal and Shear Loads", ROCK MECHANICS AND ROCK ENGINEERING, vol. 50, pages 2827, XP036332304, DOI: 10.1007/s00603-017-1242-y * |
| 王水林 等: "节理面剪切应力切向位移曲线峰值后区特性的初步研究", 岩石力学与工程学报, vol. 35, no. 2, pages 3805 - 3812 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115930847A (en) * | 2022-09-30 | 2023-04-07 | 中国科学院武汉岩土力学研究所 | Quantitative determination method for roughness evaluation index of three-dimensional structure surface |
| CN115930847B (en) * | 2022-09-30 | 2023-09-22 | 中国科学院武汉岩土力学研究所 | Quantitative determination method for roughness evaluation index of three-dimensional structural surface |
| CN115587443A (en) * | 2022-10-14 | 2023-01-10 | 北京建筑大学 | Method and device for determining roughness of rock joint surface, electronic equipment and medium |
| CN115935460A (en) * | 2022-10-14 | 2023-04-07 | 北京建筑大学 | Method and equipment for predicting rock joint rate-related peak shear strength |
| CN115587443B (en) * | 2022-10-14 | 2024-03-26 | 北京建筑大学 | Method and device for determining roughness of rock joint surface, electronic equipment and medium |
| CN115935460B (en) * | 2022-10-14 | 2024-03-26 | 北京建筑大学 | Method and equipment for predicting peak shear strength related to rock joint rate |
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