CN111579647B - Concrete member corrosion degree detection method and system based on analytic hierarchy process - Google Patents
Concrete member corrosion degree detection method and system based on analytic hierarchy process Download PDFInfo
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- CN111579647B CN111579647B CN202010639000.1A CN202010639000A CN111579647B CN 111579647 B CN111579647 B CN 111579647B CN 202010639000 A CN202010639000 A CN 202010639000A CN 111579647 B CN111579647 B CN 111579647B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention relates to a concrete member corrosion degree detection method and system based on an analytic hierarchy process, wherein the method comprises the following steps: the method comprises the steps of obtaining a standard concrete member and a concrete member to be detected on site, measuring the longitudinal wave velocity of the members by an ultrasonic velocity measurement method, determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected, determining the first weight of the longitudinal wave velocity in each direction by an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected, determining the corrosion coefficient of the concrete member according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight, determining the absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected, and determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient and the absolute damage of the concrete member. The method and the system can detect the corrosion degree of the concrete member and improve the detection precision.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a concrete member corrosion degree detection method and system based on an analytic hierarchy process.
Background
Common concrete corrosion detection methods are classified into three categories: the concrete nondestructive testing method mainly detects the defects of wall thickness, cracks, corrosion holes and the like of materials or equipment by using sound, light, magnetism, electricity and other methods, and the common methods comprise an eddy current testing technology, an acoustic emission technology, an ultrasonic testing technology and the like. The ultrasonic detection is not limited by the shape of the equipment, has strong internal defect detection capability and high speed, so the ultrasonic detection is widely applied to the corrosion damage detection of industrial equipment. However, the conventional ultrasonic detection is limited to qualitative detection in detecting the internal defect of the concrete, that is, roughly determining the range and size of the internal defect of the concrete member, and has a problem of poor detection accuracy.
Disclosure of Invention
The invention aims to provide a concrete member corrosion degree detection method and system based on an analytic hierarchy process, which can detect the corrosion degree of a concrete member and improve the detection precision.
In order to achieve the purpose, the invention provides the following scheme:
a concrete member corrosion degree detection method based on an analytic hierarchy process comprises the following steps:
acquiring a standard concrete member and a concrete member to be detected on a construction site;
respectively measuring the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected by adopting an ultrasonic velocity measurement method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises longitudinal wave velocity of X, Y and Z directions in a rectangular coordinate system;
determining a first weight of the longitudinal wave velocity of each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected;
determining the corrosion coefficient of the concrete member according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight;
determining absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected;
and determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage.
Optionally, the acquiring of the standard concrete member and the to-be-detected concrete member on the construction site specifically includes:
sampling the concrete structure on a construction site, and processing to obtain a concrete member to be detected;
and preparing a standard concrete member according to the concrete proportion in construction.
Optionally, determining the first weight of the longitudinal wave velocity in each direction by using an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected specifically includes:
determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected;
determining a second weight according to the judgment matrix;
carrying out consistency check on the judgment matrix according to the second weight to determine a consistency check value;
and selecting the second weight when the consistency check value is smaller than a preset check value as the first weight.
Optionally, the longitudinal wave of the concrete member to be detected and the longitudinal wave of the standard concrete member are calculated according to the longitudinal wave speed of the concrete member to be detected and the longitudinal wave speed of the standard concrete member
Determining the corrosion coefficient of the concrete member by the speed and each first weight, and specifically comprising the following steps:
according to the formula
Determining the corrosion coefficient of the concrete member;
wherein K is the corrosion coefficient of the concrete member, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzIs the longitudinal wave velocity, w, of the concrete member to be detected in the Z direction1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
Optionally, the determining the absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected specifically includes:
according to the formula
Determining an absolute lesion;
wherein C' is absolute damage, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity, V, of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
A concrete member corrosion degree detection system based on an analytic hierarchy process, the concrete member corrosion degree detection system comprising:
the component acquisition module is used for acquiring a standard concrete component and a concrete component to be detected on a construction site;
the longitudinal wave velocity determining module is used for respectively measuring the longitudinal wave velocity of the standard concrete member and the concrete member to be detected by adopting an ultrasonic speed measuring method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises X, Y longitudinal wave velocity in a rectangular coordinate system and longitudinal wave velocity in a Z direction;
the first weight determination module is used for determining the first weight of the longitudinal wave velocity in each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected;
the concrete member corrosion coefficient determining module is used for determining the concrete member corrosion coefficient according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight;
the absolute damage determining module is used for determining absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected;
and the corrosion degree determining module is used for determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage.
Optionally, the component obtaining module specifically includes:
the device comprises a to-be-detected concrete member acquisition unit, a processing unit and a processing unit, wherein the to-be-detected concrete member acquisition unit is used for sampling a concrete structure on a construction site and processing the concrete structure to obtain a to-be-detected concrete member;
and the standard concrete member preparation unit is used for preparing a standard concrete member according to the concrete proportion in construction.
Optionally, the first weight determining module specifically includes:
the judgment matrix determining unit is used for determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected;
a second weight determining unit configured to determine a second weight according to the determination matrix;
a consistency check value determining unit, configured to perform consistency check on the determination matrix according to the second weight, and determine a consistency check value;
and the first weight determining unit is used for selecting the second weight when the consistency check value is smaller than a preset check value as the first weight.
Optionally, the concrete member corrosion coefficient determining module specifically includes:
a concrete member corrosion coefficient determining unit for determining the corrosion coefficient of the concrete member according to the formula
Determining the corrosion coefficient of the concrete member;
wherein K is the corrosion coefficient of the concrete member, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzIs the longitudinal wave velocity, w, of the concrete member to be detected in the Z direction1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
Optionally, the absolute damage determining module specifically includes:
an absolute damage determination unit for determining the damage according to the formula
Determining an absolute lesion;
wherein C' is absolute damage, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity, V, of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a concrete member corrosion degree detection method and system based on an analytic hierarchy process, wherein longitudinal wave velocities in X, Y and Z directions in a rectangular coordinate system of a concrete member are measured by adopting an ultrasonic velocity measurement method to obtain a three-dimensional longitudinal wave velocity, and then a concrete member damage evaluation system based on the wave velocity is established by adopting the analytic hierarchy process, namely a double-index judgment system of corrosion coefficient and absolute damage is adopted to quantitatively evaluate the corrosion degree of the concrete member. The method comprises the steps of measuring longitudinal wave velocity of a concrete member in three directions, considering the corrosion degree of the concrete member in each direction more comprehensively, calculating the corrosion coefficient of the concrete member more completely and accurately, adopting a double-index judgment system of the corrosion coefficient and absolute damage, considering the damage difference of the concrete member in each direction, considering the damage degree of the concrete member, enabling the detection result to be more reliable, and improving the detection accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a concrete member corrosion degree detection method based on an analytic hierarchy process according to the present invention;
FIG. 2 is a layout diagram of ultrasonic velocity measurement points provided by the present invention;
fig. 3 is a schematic structural diagram of a system for detecting corrosion degree of a concrete member based on an analytic hierarchy process according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a concrete member corrosion degree detection method and system based on an analytic hierarchy process, which can detect the corrosion degree of a concrete member and improve the detection precision.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The ultrasonic nondestructive detection technology is used for analyzing the material characteristics of a solid medium by measuring ultrasonic signals passing through the solid medium, and is widely applied to quality detection of various engineering structures due to convenience and nondestructive property. However, the traditional ultrasonic detection of concrete members is mostly linear, the detection range is mainly a linear region between transducers during detection, the damaged region of the concrete member is often more three-dimensional and complex, a single-dimensional detection result is not enough to judge the overall damage condition of the member, and if multiple directions are tested simultaneously, the difference of the results in each direction is difficult to be reflected simply and intuitively.
Therefore, the invention constructs a concrete member three-dimensional damage degree detection system by combining a multi-direction test with a hierarchical analysis method, establishes an integrity index and an absolute damage index of the concrete member by utilizing an analytic hierarchy process on the basis of carrying out a three-dimensional sound velocity test on the concrete member, and forms a concrete member three-dimensional damage judgment standard by adopting a double-index system.
Fig. 1 is a flowchart of a method for detecting corrosion degree of a concrete member based on an analytic hierarchy process, as shown in fig. 1, the method for detecting corrosion degree of a concrete member according to the present invention includes:
s101, acquiring a standard concrete member and a concrete member to be detected on a construction site, and specifically comprising the following steps:
101) and sampling the concrete structure on a construction site, and processing to obtain the concrete member to be detected. Specifically, core drilling or cutting sampling is carried out on a site concrete building (structure), and the sample is prepared into a cubic sample of 100 multiplied by 100 or a cylindrical sample of 50 multiplied by 100, wherein the sample is the concrete member to be detected.
102) And preparing a standard concrete member according to the concrete proportion in construction. Specifically, a new concrete standard test piece is manufactured according to the mixing ratio during construction, and the new concrete standard test piece is maintained for 28 days by referring to a test piece maintenance method in standard test method for long-term performance and durability of common concrete (GB/T50082-2009) to obtain a standard concrete member.
S102, measuring the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected by adopting an ultrasonic velocity measurement method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises longitudinal wave velocity of X, Y, Z in three directions under a rectangular coordinate system.
Respectively measuring the longitudinal wave velocity of the sampled concrete member to be detected from X, Y, Z three directions, respectively measuring the longitudinal wave velocity of 4-5 measuring points in each direction, wherein the distribution of the ultrasonic measuring points is shown in figure 2, and averaging the longitudinal wave velocities of a plurality of measuring points in each direction to obtain an average value in each direction, namely Vx、VyAnd Vz. Then, measuring the longitudinal wave velocity of the standard concrete member by the same wave velocity measuring method as that of the concrete member to be detected to obtain the longitudinal wave velocities V 'in three directions'x、V′yAnd V'zObtaining the longitudinal wave velocity of the standard concrete member according to the longitudinal wave velocities in three directions, and recording the longitudinal wave velocity as V0，
Wherein, V'xIs the longitudinal wave velocity V 'of the standard concrete member in the X direction'yIs the longitudinal wave velocity V 'of the standard concrete member in the Y direction'zIs the longitudinal wave velocity of the standard concrete member in the Z direction.
S103, determining a first weight of the longitudinal wave velocity in each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected, and specifically comprising the following steps:
301) and determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected.
And calculating the influence weights of the three directions by using an analytic hierarchy process to determine the relative importance degree of each direction. The propagation speed of the ultrasonic wave in the medium indirectly reflects the material performance, the longitudinal wave speed of the ultrasonic wave is also reduced along with the development of material damage, a damage judgment parameter C is defined, and the calculation method is as follows:
wherein Vi is Vx、VyOr VzVj is Vx、VyOr Vz。
According to the C value, the concrete corrosion degree discrimination value V is obtained according to the table 1ijAnd forming a three-dimensional judgment matrix, wherein the judgment matrix is shown in a table 2. (the value is determined according to the principle that the concrete is generally damaged when the difference of the sound velocities of the same concrete exceeds 15 percent, and the damage is very large when the difference exceeds 10 percent)
TABLE 1 judge matrix Scale and its meanings
Table 2 three-dimensional determination matrix for concrete corrosion degree
Thus, a decision matrix is obtained
Wherein, V11Indicates the severity of the degree of erosion in the X-direction compared to the X-direction, since the wave velocities in both directions are the same and are 1, i.e., V in Table 1ijThe value of (A) is 1, and the corrosion degrees in the two directions are basically consistent. E.g. V21The practical meaning is comparison of corrosion severity in Y direction and X direction, and the specific value is based on C value, for example, Y direction wave speed is 4000m/s, X direction wave speed is 3900m/s, then
0.957 is close to 0.95 so V21The final value is 2.
302) And determining a second weight according to the judgment matrix.
Specifically, the method root is used for solving the weight vector approximate value W of the evaluation factori′：
Approximate value W of weight vector of evaluation factori' normalization processing is carried out to obtain the weight W of the evaluation factoriI.e. the second weight, the relation is:
303) and carrying out consistency check on the judgment matrix according to the second weight to determine a consistency check value. Specifically, in order to ensure the accuracy of the judgment matrix, consistency check needs to be performed on the judgment matrix, and the check relation is as follows:
since the decision matrix is a 3-order matrix, the random consistency index RI is 0.52, CR is a consistency check value, CI is a consistency index, and λmaxIs the maximum characteristic root of the judgment matrix.
304) And selecting the second weight when the consistency check value is smaller than a preset check value as the first weight.
Specifically, whether the consistency check value is smaller than a preset check value is judged, and a judgment result is obtained. In the embodiment of the invention, the preset check value is 0.1. And if the judgment result shows that the consistency check value is smaller than the preset check value, determining that the second weight is the first weight, namely when CR is smaller than 0.1, considering that the consistency performance is accepted, and at the moment, the second weight is the first weight finally obtained. If the judgment result shows that the consistency check value is larger than or equal to a preset check value, updating a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected, and returning to 302), namely when CR is larger than or equal to 0.1, judging that the consistency cannot be accepted, and adjusting the judgment matrix until the consistency is accepted.
And S104, determining the corrosion coefficient of the concrete member according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight.
According to S103, X, Y and the first weights of the three directions of Z are respectively w1、w2And w3Then according to the formula
Determining the corrosion coefficient of the concrete member, wherein K is the corrosion coefficient of the concrete member, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzIs the longitudinal wave velocity, w, of the concrete member to be detected in the Z direction1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
S105, determining absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected, and specifically comprising the following steps:
according to the formula
Determining absolute damage, wherein C' is absolute damage and VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity, V, of the concrete member to be tested0Is standard coagulationAnd the longitudinal wave velocity of the soil member.
And S106, determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage.
When C' is less than 0.75, the part of the concrete member to be detected is seriously damaged, and the damage degree is extremely high.
When C' is more than or equal to 0.75, judging according to the K value:
when K is more than 0.9 and less than or equal to 1, the corrosion degree of the concrete member to be detected is extremely low.
And when K is more than 0.7 and less than or equal to 0.9, the corrosion degree of the concrete member to be detected is lower.
And when K is more than 0.5 and less than or equal to 0.7, the corrosion degree of the concrete member to be detected is higher.
When K is more than 0.2 and less than or equal to 0.5, the corrosion degree of the concrete member to be detected is very high.
And when K is less than or equal to 0.2, the corrosion degree of the concrete member to be detected is extremely high.
The invention also provides a concrete member corrosion degree detection system based on an analytic hierarchy process, as shown in fig. 3, the concrete member corrosion degree detection system comprises:
the component obtaining module 1 is used for obtaining a standard concrete component and a concrete component to be detected on a construction site.
The longitudinal wave velocity determining module 2 is used for respectively measuring the longitudinal wave velocity of the standard concrete member and the concrete member to be detected by adopting an ultrasonic speed measuring method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises the longitudinal wave velocity of X, Y and Z directions in a rectangular coordinate system.
And the first weight determining module 3 is used for determining the first weight of the longitudinal wave velocity in each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected.
And the concrete member corrosion coefficient determining module 4 is used for determining the concrete member corrosion coefficient according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight.
And the absolute damage determining module 5 is used for determining the absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected.
And the corrosion degree determining module 6 is used for determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage.
Preferably, the component acquisition module 1 specifically includes:
the device comprises a to-be-detected concrete member acquisition unit, a processing unit and a processing unit, wherein the to-be-detected concrete member acquisition unit is used for sampling a concrete structure on a construction site and processing the concrete structure to obtain a to-be-detected concrete member;
and the standard concrete member preparation unit is used for preparing a standard concrete member according to the concrete proportion in construction.
Preferably, the first weight determining module 3 specifically includes:
and the judgment matrix determining unit is used for determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected.
And the second weight determining unit is used for determining a second weight according to the judgment matrix.
And the consistency check value determining unit is used for performing consistency check on the judgment matrix according to the second weight to determine a consistency check value.
And the first weight determining unit is used for selecting the second weight when the consistency check value is smaller than a preset check value as the first weight.
Preferably, the concrete member corrosion coefficient determining module 4 specifically includes:
a concrete member corrosion coefficient determining unit for determining the corrosion coefficient of the concrete member according to the formula
Determining the corrosion coefficient of the concrete member, wherein K is the corrosion coefficient of the concrete member, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity of the concrete member to be detected，w1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
Preferably, the absolute damage determining module 5 specifically includes:
an absolute damage determination unit for determining the damage according to the formula
Determining absolute damage, wherein C' is absolute damage and VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity, V, of the concrete member to be tested0Is the longitudinal wave velocity of the standard concrete member.
The invention provides a concrete member corrosion degree detection method and system based on an analytic hierarchy process, wherein longitudinal wave velocities in X, Y and Z directions in a rectangular coordinate system of a concrete member are measured by adopting an ultrasonic velocity measurement method to obtain a three-dimensional longitudinal wave velocity, a concrete member damage evaluation system based on the wave velocity is established by adopting the analytic hierarchy process to quantitatively evaluate the corrosion degree of the concrete member, and the problems that the traditional ultrasonic detection result is single and the comprehensive damage state of the member cannot be reflected are solved.
The invention provides a three-dimensional detection method for the corrosion degree of a concrete member based on an analytic hierarchy process, which aims to solve the problem that the corrosion degree of the concrete member in a single direction cannot be completely and accurately reflected by the sound velocity in a single direction due to different corrosion degrees in all directions, and more comprehensively considers the corrosion degree of the concrete member in all directions, thereby more completely and accurately calculating the corrosion coefficient of the concrete member and quantitatively evaluating the corrosion degree of the concrete member.
The invention has the advantages that:
1. the method calculates the corrosion condition of the concrete member by combining the wave velocities of the concrete member in three directions, can more comprehensively and accurately analyze the corrosion condition of each part of the concrete member, and ensures that the calculation result is more reliable.
2. According to the method, the corrosion conditions of the concrete member in all directions are weighted by using an analytic hierarchy process, so that the calculation process is optimized, and the obtained calculation result is more accurate.
3. The invention performs three-dimensional sound velocity test on the concrete member to be detected, the test range basically covers the whole range of the concrete member to be detected, and the reliability of the detection result is improved.
4. According to the invention, by setting the damage judgment parameters, the damage difference of each dimension is digitalized visually, the analysis and quantification of the detection result are realized, and the analysis accuracy is improved.
5. The invention adopts a double-index judgment system of corrosion coefficient and absolute damage, not only considers the damage difference of the concrete member in each direction, but also considers the damage degree of the concrete member, so that the detection result is more reliable.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A concrete member corrosion degree detection method based on an analytic hierarchy process is characterized by comprising the following steps:
acquiring a standard concrete member and a concrete member to be detected on a construction site;
carrying out three-dimensional sound velocity test on the concrete member to be detected;
respectively measuring the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected by adopting an ultrasonic velocity measurement method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises longitudinal wave velocity of X, Y and Z directions in a rectangular coordinate system;
determining a first weight of the longitudinal wave velocity of each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected;
the method for determining the first weight of the longitudinal wave velocity in each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected specifically comprises the following steps:
determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected;
determining a second weight according to the judgment matrix;
carrying out consistency check on the judgment matrix according to the second weight to determine a consistency check value;
selecting the second weight when the consistency check value is smaller than a preset check value as a first weight;
determining the corrosion coefficient of the concrete member according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight;
the determining the corrosion coefficient of the concrete member according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight specifically comprises the following steps:
according to the formula
Determining the corrosion coefficient of the concrete member;
wherein K is the corrosion coefficient of the concrete member, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyLongitudinal wave velocity of concrete member to be detected in Y direction，VzIs the longitudinal wave velocity, w, of the concrete member to be detected in the Z direction1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0The wave velocity is the longitudinal wave velocity of a standard concrete member;
determining absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected;
the determining the absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected specifically comprises:
according to the formula
Determining an absolute lesion;
wherein C' is absolute damage;
determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage;
the determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage specifically comprises the following steps:
when C' is less than 0.75, the part of the concrete member to be detected is seriously damaged, and the damage degree is extremely high;
when C' is more than or equal to 0.75, judging according to the K value:
when K is more than 0.9 and less than or equal to 1, the corrosion degree of the concrete member to be detected is extremely low;
when K is more than 0.7 and less than or equal to 0.9, the corrosion degree of the concrete member to be detected is lower;
when K is more than 0.5 and less than or equal to 0.7, the corrosion degree of the concrete member to be detected is higher;
when K is more than 0.2 and less than or equal to 0.5, the corrosion degree of the concrete member to be detected is very high;
and when K is less than or equal to 0.2, the corrosion degree of the concrete member to be detected is extremely high.
2. The method for detecting the corrosion degree of the concrete member based on the analytic hierarchy process of claim 1, wherein the obtaining of the standard concrete member and the concrete member to be detected in the construction site specifically comprises:
sampling the concrete structure on a construction site, and processing to obtain a concrete member to be detected;
and preparing a standard concrete member according to the concrete proportion in construction.
3. The method for detecting the corrosion degree of the concrete member based on the analytic hierarchy process of claim 1, wherein the determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected specifically comprises:
the influence weight in three directions is calculated by using an analytic hierarchy process, the relative importance degree of each direction is determined, the propagation speed of ultrasonic waves in a medium indirectly reflects the performance of a material, the longitudinal wave speed of the ultrasonic waves is reduced along with the development of material damage, a damage judgment parameter C is defined, and the calculation mode is as follows:
wherein, ViIs the longitudinal wave velocity in the X direction, the longitudinal wave velocity in the Y direction or the longitudinal wave velocity in the Z direction, VjThe longitudinal wave velocity in the X direction, the longitudinal wave velocity in the Y direction or the longitudinal wave velocity in the Z direction;
determining a concrete corrosion degree discrimination value V according to the C valueijForming a three-dimensional judgment matrix;
concrete corrosion degree discrimination value VijThe determination method comprises the following steps: when C is presentijGreater than 0.99, VijThe value is 1, which indicates that the corrosion degrees in the two directions are basically consistent; when C is presentijWhen it is more than 0.95 and not more than 0.99, VijThe value is 2,3, which represents the corrosion degree in two directions, one is slightly more serious than the other; when C is presentijWhen it is greater than 0.90 and not more than 0.95, VijThe value is 4,5, which represents the corrosion degrees in two directions, one corrosion degree is obviously more serious than the other corrosion degree; when in useCijWhen it is more than 0.75 and not more than 0.90, VijThe value is 6,7, which represents the corrosion degrees in two directions, one is more severe than the other; when C is presentijWhen it is 0.75 or less, VijThe value is 8,9, which represents the corrosion degree in two directions, one is extremely serious compared with the other;
three-dimensional decision matrix is
Wherein V11＝1，V22＝1，V33＝1，
Obtaining a judgment matrix
Wherein, V11Showing the severity of corrosion, V, in comparison of the longitudinal wave velocity in the X-direction with the longitudinal wave velocity in the X-direction12V is the severity of the longitudinal wave velocity in the X direction compared with the longitudinal wave velocity in the Y direction or the degree of corrosion13The severity of the degree of corrosion, V, is the ratio of the longitudinal wave velocity in the X direction to the longitudinal wave velocity in the Z direction21V is the severity of the degree of corrosion compared with the velocity of the longitudinal wave in the Y direction or the velocity of the longitudinal wave in the X direction22V is the longitudinal wave velocity in the Y direction or the severity of the corrosion compared with the longitudinal wave velocity in the Y direction23The severity of the degree of corrosion, V, being the longitudinal wave velocity in the Y direction or compared with the longitudinal wave velocity in the Z direction31Severity of corrosion, V, as a comparison of the longitudinal wave velocity in the Z direction with the longitudinal wave velocity in the X direction32V is the severity of the longitudinal wave velocity in the Z direction compared with the longitudinal wave velocity in the Y direction or the degree of corrosion33The severity of the degree of corrosion is determined by comparing the longitudinal wave velocity in the Z direction with the longitudinal wave velocity in the Z direction.
4. A concrete member corrosion degree detection system based on an analytic hierarchy process, the concrete member corrosion degree detection system comprising:
the component acquisition module is used for acquiring a standard concrete component and a concrete component to be detected on a construction site;
the sound velocity testing module is used for carrying out three-dimensional sound velocity testing on the concrete member to be tested;
the longitudinal wave velocity determining module is used for respectively measuring the longitudinal wave velocity of the standard concrete member and the concrete member to be detected by adopting an ultrasonic speed measuring method, and determining the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected; the longitudinal wave velocity of the concrete member to be detected comprises longitudinal wave velocity of X, Y and Z directions in a rectangular coordinate system;
the first weight determination module is used for determining the first weight of the longitudinal wave velocity in each direction by adopting an analytic hierarchy process according to the longitudinal wave velocity of the concrete member to be detected;
the first weight determining module specifically includes:
the judgment matrix determining unit is used for determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected;
a second weight determining unit configured to determine a second weight according to the determination matrix;
a consistency check value determining unit, configured to perform consistency check on the determination matrix according to the second weight, and determine a consistency check value;
a first weight determining unit, configured to select the second weight when the consistency check value is smaller than a preset check value as a first weight;
the concrete member corrosion coefficient determining module is used for determining the concrete member corrosion coefficient according to the longitudinal wave velocity of the concrete member to be detected, the longitudinal wave velocity of the standard concrete member and each first weight;
the concrete member corrosion coefficient determining module specifically comprises:
a concrete member corrosion coefficient determining unit for determining the corrosion coefficient of the concrete member according to the formula
Determining the corrosion coefficient of the concrete member;
wherein K is a concrete memberCorrosion coefficient, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzIs the longitudinal wave velocity, w, of the concrete member to be detected in the Z direction1Is a first weight, w, of the concrete member to be tested in the X direction2Is a first weight, w, of the concrete member to be tested in the Y direction3Is a first weight, V, in the Z-direction of the concrete member to be tested0The wave velocity is the longitudinal wave velocity of a standard concrete member;
the absolute damage determining module is used for determining absolute damage according to the longitudinal wave velocity of the standard concrete member and the longitudinal wave velocity of the concrete member to be detected;
the absolute damage determining module specifically includes:
an absolute damage determination unit for determining the damage according to the formula
Determining an absolute lesion;
wherein C' is absolute damage, VxFor the longitudinal wave velocity, V, of the concrete member to be tested in the X directionyFor the longitudinal wave velocity, V, of the concrete member to be tested in the Y directionzFor the Z-direction longitudinal wave velocity, V, of the concrete member to be tested0The wave velocity is the longitudinal wave velocity of a standard concrete member;
the corrosion degree determining module is used for determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage;
the determining the corrosion degree of the concrete member to be detected according to the corrosion coefficient of the concrete member and the absolute damage specifically comprises the following steps:
when C' is less than 0.75, the part of the concrete member to be detected is seriously damaged, and the damage degree is extremely high;
when C' is more than or equal to 0.75, judging according to the K value:
when K is more than 0.9 and less than or equal to 1, the corrosion degree of the concrete member to be detected is extremely low;
when K is more than 0.7 and less than or equal to 0.9, the corrosion degree of the concrete member to be detected is lower;
when K is more than 0.5 and less than or equal to 0.7, the corrosion degree of the concrete member to be detected is higher;
when K is more than 0.2 and less than or equal to 0.5, the corrosion degree of the concrete member to be detected is very high;
and when K is less than or equal to 0.2, the corrosion degree of the concrete member to be detected is extremely high.
5. The analytic hierarchy process-based concrete member corrosion degree detection system of claim 4, wherein the member acquisition module specifically comprises:
the device comprises a to-be-detected concrete member acquisition unit, a processing unit and a processing unit, wherein the to-be-detected concrete member acquisition unit is used for sampling a concrete structure on a construction site and processing the concrete structure to obtain a to-be-detected concrete member;
and the standard concrete member preparation unit is used for preparing a standard concrete member according to the concrete proportion in construction.
6. The concrete member corrosion degree detection system based on the analytic hierarchy process of claim 4, wherein the determining a judgment matrix according to the longitudinal wave velocity of the concrete member to be detected specifically comprises:
the influence weight in three directions is calculated by using an analytic hierarchy process, the relative importance degree of each direction is determined, the propagation speed of ultrasonic waves in a medium indirectly reflects the performance of a material, the longitudinal wave speed of the ultrasonic waves is reduced along with the development of material damage, a damage judgment parameter C is defined, and the calculation mode is as follows:
wherein, ViIs the longitudinal wave velocity in the X direction, the longitudinal wave velocity in the Y direction or the longitudinal wave velocity in the Z direction, VjThe longitudinal wave velocity in the X direction, the longitudinal wave velocity in the Y direction or the longitudinal wave velocity in the Z direction;
determining a concrete corrosion degree discrimination value V according to the C valueijForming a three-dimensional judgment matrix;
degree of concrete corrosionThe discrimination value VijThe determination method comprises the following steps: when C is presentijGreater than 0.99, VijThe value is 1, which indicates that the corrosion degrees in the two directions are basically consistent; when C is presentijWhen it is more than 0.95 and not more than 0.99, VijThe value is 2,3, which represents the corrosion degree in two directions, one is slightly more serious than the other; when C is presentijWhen it is greater than 0.90 and not more than 0.95, VijThe value is 4,5, which represents the corrosion degrees in two directions, one corrosion degree is obviously more serious than the other corrosion degree; when C is presentijWhen it is more than 0.75 and not more than 0.90, VijThe value is 6,7, which represents the corrosion degrees in two directions, one is more severe than the other; when C is presentijWhen it is 0.75 or less, VijThe value is 8,9, which represents the corrosion degree in two directions, one is extremely serious compared with the other;
three-dimensional decision matrix is
Wherein V11＝1，V22＝1，V33＝1；
Obtaining a judgment matrix
Wherein, V11Showing the severity of corrosion, V, in comparison of the longitudinal wave velocity in the X-direction with the longitudinal wave velocity in the X-direction12V is the severity of the longitudinal wave velocity in the X direction compared with the longitudinal wave velocity in the Y direction or the degree of corrosion13The severity of the degree of corrosion, V, is the ratio of the longitudinal wave velocity in the X direction to the longitudinal wave velocity in the Z direction21V is the severity of the degree of corrosion compared with the velocity of the longitudinal wave in the Y direction or the velocity of the longitudinal wave in the X direction22V is the longitudinal wave velocity in the Y direction or the severity of the corrosion compared with the longitudinal wave velocity in the Y direction23The severity of the degree of corrosion, V, being the longitudinal wave velocity in the Y direction or compared with the longitudinal wave velocity in the Z direction31Severity of corrosion, V, as a comparison of the longitudinal wave velocity in the Z direction with the longitudinal wave velocity in the X direction32The longitudinal wave velocity in the Z direction and the longitudinal wave velocity in the Y directionOr in comparison with the severity of the degree of corrosion, V33The severity of the degree of corrosion is determined by comparing the longitudinal wave velocity in the Z direction with the longitudinal wave velocity in the Z direction.
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