CN111310273A - Full-bridge structure safety state monitoring method and system based on multi-source data - Google Patents
Full-bridge structure safety state monitoring method and system based on multi-source data Download PDFInfo
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Abstract
The invention relates to a full-bridge structure safety state monitoring method and system based on multi-source data, belongs to the technical field of bridge monitoring, and solves the problems of low monitoring efficiency and poor reliability in the prior art. The method comprises the following steps: acquiring structure appearance data and mechanical response data of a full bridge to be evaluated; respectively obtaining comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and the acquired mechanical response data; the method has the advantages that the safety state monitoring result of the full-bridge structure is obtained based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system, the intuition and the real-time performance of bridge monitoring are integrated, and the monitoring efficiency and the reliability of the monitoring result are improved.
Description
Technical Field
The invention relates to the technical field of bridge monitoring, in particular to a full-bridge structure safety state monitoring method and system based on multi-source data.
Background
After the bridge is built, the bridge is easily damaged under the effects of weather, corrosion, oxidation or aging and the like and under the action of static load and live load for a long time, and accordingly, the strength and the rigidity of the bridge are reduced along with the increase of time. This not only can influence the safety of driving, still can make the life of bridge shorten.
The traditional bridge safety state monitoring method mainly comprises the steps of carrying out manual visual inspection or bridge technical condition evaluation by means of appearance detection information obtained by portable instrument measurement, wherein in recent years, a Structural Health Monitoring (SHM) technology is widely applied to safety monitoring of a large-span bridge.
The prior art mainly has the following defects that firstly, the manual visual inspection method has long period, strong subjectivity and poor timeliness and is difficult to realize the real-time quantitative tracking of the structure safety performance; secondly, the Structural Health Monitoring (SHM) technology can acquire mechanical response information such as stress and deflection of the bridge structure, but cannot acquire the apparent degradation condition of the bridge structure, and is not intuitive enough.
Disclosure of Invention
In view of the foregoing analysis, embodiments of the present invention provide a full-bridge safety status monitoring method and system based on multi-source data, so as to solve the problems that the prior art cannot consider both the intuitiveness and the real-time property of bridge monitoring, and has low monitoring efficiency and poor reliability.
On one hand, the invention provides a full-bridge structure safety state monitoring method based on multi-source data, which comprises the following steps:
acquiring structure appearance data and structure mechanical response data of a full bridge to be evaluated;
respectively obtaining comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and structure mechanical response data;
and obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system.
Further, the structural appearance data comprises one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data comprises one or more of structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement;
measuring and obtaining the defect degree, the concrete strength degradation degree, the steel bar corrosion degree and the steel bar protective layer thickness by a portable instrument; and the structural strain, the transverse correlation coefficient, the structural acceleration, the structural deflection, the cable force, the fatigue stress, the temperature and the displacement are obtained by arranging sensing equipment on the bridge for measurement.
Further, the safety state evaluation model of the bridge structure obtains the comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge through the following processes:
obtaining first structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure apparent data, and obtaining second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanical response data;
and obtaining the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge according to the weight values of the structural apparent data and the structural mechanical response data on the influence of the safety state of the bridge structure based on the results.
Further, the obtaining a first structural safety state result of the upper structure, the lower structure and the bridge deck system of the bridge according to the structural appearance data and obtaining a second structural safety state result of the upper structure, the lower structure and the bridge deck system of the bridge according to the structural mechanics response data comprises:
one or more data included in the structural appearance data correspond to one or more indexes, one or more data included in the structural mechanical response data correspond to one or more indexes, and safety condition characterization values of the indexes of the corresponding parts of the upper structure, the lower structure and the bridge deck system of the bridge are obtained according to the structural appearance data and the structural mechanical response data respectively;
respectively obtaining a first safety state result of the bridge superstructure by the following formula according to the safety condition characterization value obtained based on the structure appearance data:
the first safety state result of the bridge substructure is:
the first safety state result of the bridge deck system is as follows:
wherein, PCCI'qBCCI 'as a safety status result of the q-th component of the bridge superstructure'mDCCI 'as a safety status result of m-th component of bridge substructure'nIs the safety state result, B ', of the n-th bridge surface component'q、B'm、B'nThe weight values, PCCI ', of the corresponding parts of the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure'p、BCCI'p、DCCI'pRespectively representing safety condition characterization values corresponding to the pth indexes of all parts in the upper part structure, the lower part structure and the bridge deck system of the bridge obtained on the basis of the structure appearance data, bp1、bp2、bp3Weighting values of the p-th indexes of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, Q, M, N the quantities of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, and s the quantity of the indexes included in the structural appearance data;
the safety condition characterization values obtained based on the structural mechanics response data are respectively obtained through the following formulas
The second safety state result of the bridge superstructure is:
the second safety state result of the bridge substructure is:
the result of the second safety state of the bridge deck system is as follows:
wherein, PCCI "qSafety status results for the qth part of the bridge superstructure, BCCI "mDCCI, a safety status result for the mth component of the bridge substructure "nAs a result of the safety state of the nth component of the bridge surface system, B "q、B”m、B”nThe weight values, PCCI', of the parts in the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure "f、BCCI"f、DCCI"fRespectively representing safety condition characterization values corresponding to the f index of each part in the upper structure, the lower structure and the bridge deck system of the bridge obtained based on structural mechanics response data, bf1、bf2、bf3The f-th indexes of the parts in the bridge upper structure, the bridge lower structure and the bridge deck system respectively relate to the weight values of structural mechanical response data, and t is the number of indexes included in the structural mechanical response data.
Further, the comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge are obtained through the following formulas respectively:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3×BDCI”，
wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data on the influence of the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively.
Further, according to the comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge, the safety state result of the full-bridge structure is obtained through the following formula:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSB，
wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state.
Further, the structure appearance data and the structure mechanical response data are qualitatively determined as two factors influencing the safety state of the bridge structure, and the data included in the structure appearance data and the structure mechanical response data are qualitatively determined as indexes;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
comparing the importance degrees of the indexes on the structural appearance factors or the structural internal force factors pairwise, comparing the importance degrees of the structural appearance factors and the structural internal force factors on the bridge structure safety state evaluation pairwise, and constructing a judgment matrix by using the ratio of the importance degrees of the two factors;
calculating to obtain corresponding eigenvectors by using a characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the safety state of the bridge structure, and further obtaining corresponding weight values;
and calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
According to the technical effects, the invention has the following beneficial effects:
1. the data adopted by the monitoring method provided by the invention not only comprise the structure appearance data of the bridge to be monitored, but also comprise the structure mechanics response data of the bridge to be monitored, and meanwhile, the intuitiveness of the structure appearance data and the real-time property of the structure mechanics response data are considered, so that the reliability of the bridge structure safety monitoring result is improved;
2. according to the invention, the comprehensive safety evaluation state of each part of the bridge structure is obtained through the weighted values of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, and the monitoring result of the safety state of the full-bridge structure is obtained according to the comprehensive safety evaluation state of each part of the bridge structure and the weighted values of the influence of each part of the bridge structure on the safety state of the full-bridge structure, so that the safe multi-angle, multi-level and omnibearing monitoring on the full-bridge structure is realized, the monitoring efficiency and the reliability of the monitoring result are improved, and.
In another aspect, the invention provides a full-bridge safety state monitoring system based on multi-source data, comprising
The acquisition device is used for acquiring structure apparent data and structure mechanical response data of the full-bridge structure to be evaluated, and comprises a portable measuring instrument and sensing equipment; the structural apparent data comprises one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data comprises one or more of structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement; the portable measuring instrument is used for collecting the structural appearance data, and the sensing equipment is used for collecting the structural mechanical response data;
the processing device is used for acquiring comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and the acquired structure mechanical response data; and obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system.
Further, the processing device obtains the safety state monitoring result of the full-bridge structure through the following processes:
obtaining first structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure apparent data, and obtaining second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanical response data;
and obtaining comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by the following formulas respectively based on the results:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3×BDCI”，
wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data influencing the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively;
and obtaining a full-bridge structure safety state result according to the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge through the following formula:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSB，
wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state.
Further, the structure appearance data and the structure mechanical response data are qualitatively determined as two factors influencing the safety state of the bridge structure, and the data included in the structure appearance data and the structure mechanical response data are qualitatively determined as indexes;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
comparing the importance degrees of the indexes on the structural appearance factors or the structural internal force factors pairwise, comparing the importance degrees of the structural appearance factors and the structural internal force factors on the bridge structure safety state evaluation pairwise, and constructing a judgment matrix by using the ratio of the importance degrees of the two factors;
calculating to obtain corresponding eigenvectors by using a characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the safety state of the bridge structure, and further obtaining corresponding weight values;
and calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
The full-bridge structure safety state monitoring system has the same principle as the monitoring method, so the monitoring system also has the corresponding technical effect as the monitoring method.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a flow chart of a method for monitoring the safety state of a full-bridge structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an index system of a bridge structure safety state evaluation model according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a full-bridge safety state monitoring system according to an embodiment of the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The embodiment of the invention discloses a full-bridge structure safety state monitoring method based on multi-source data, and is shown in figure 1.
The method comprises the following steps:
s1, collecting structural apparent data and structural mechanical response data of a full bridge to be evaluated;
s2, acquiring comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and structure mechanical response data;
and step S3, obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper part structure, the lower part structure and the bridge deck system of the bridge in the safety state of the full-bridge structure and the comprehensive safety state result of the upper part structure, the lower part structure and the bridge deck system of the bridge.
Preferably, the structural appearance data in step S1 includes one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data includes one or more of structural strain, lateral correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement;
measuring and obtaining the defect degree, the concrete strength degradation degree, the steel bar corrosion degree and the steel bar protective layer thickness by a portable instrument; and the structural strain, the transverse correlation coefficient, the structural acceleration, the structural deflection, the cable force, the fatigue stress, the temperature and the displacement are obtained by arranging sensing equipment on the bridge for measurement.
Specifically, apparent structural data such as the defect degree, the concrete strength degradation degree, the steel bar corrosion degree, the steel bar protective layer thickness and the like are obtained in a manual visual inspection mode or a portable instrument measurement mode and can be called as detection data; structural mechanical response data such as structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature, displacement and the like are obtained by measuring sensing equipment arranged on the bridge and can be called as monitoring data. Illustratively, the structural strain and the structural acceleration are measured by a strain sensor and an acceleration sensor, respectively, and the transverse correlation coefficient can be calculated according to structural strain or structural acceleration data, which can be known to those skilled in the art.
As shown in fig. 2, for example, the index system of the bridge structure safety state evaluation model in step S2 includes a target layer, a criterion layer and an index layer, the target layer is a bridge structure safety evaluation result, the criterion layer includes an apparent structural factor and an internal force factor, and accordingly, the index corresponding to the apparent structural factor includes a defect degree, a concrete strength degradation degree, a steel bar corrosion degree and a steel bar protection layer thickness, and the index corresponding to the internal force factor includes a structural strain, a transverse correlation coefficient, a structural acceleration, a structural deflection, a cable force, a fatigue stress, a temperature and a displacement.
Considering different bridges, the weighted values of the influences of all indexes on the bridge structure safety state result are different, or part of the indexes have no influence on the bridge structure safety state result, so that different indexes can be selected according to actual conditions to establish a bridge structure safety state evaluation model.
Specifically, in step S2, the bridge structure safety state evaluation model obtains the comprehensive safety state results of the bridge superstructure, the bridge substructure and the bridge deck system through the following processes:
step S21, respectively obtaining first safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure appearance data, and obtaining second safety state evaluation results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanics response data;
and step S22, obtaining the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge according to the structural appearance data and the weight value of the structural mechanics response data on the influence of the safety state of the bridge structure based on the results.
Preferably, in step S21, the obtaining a first safety state result of the bridge superstructure, the bridge substructure and the bridge deck system according to the structure appearance data and obtaining a second safety state evaluation result of the bridge superstructure, the bridge substructure and the bridge deck system according to the structure mechanics response data includes:
step S211, one or more data included in the structural appearance data correspond to one or more indexes, one or more data included in the structural mechanics response data correspond to one or more indexes, and safety condition characterization values of the indexes of the corresponding parts of the upper structure, the lower structure and the bridge deck of the bridge are obtained according to the structural appearance data and the structural mechanics response data respectively; specifically, comparing the structural appearance data and the structural mechanics response data of each index of each part corresponding to each part structure of the bridge with the evaluation standard respectively to obtain corresponding safety condition characterization values; the evaluation criteria can be determined according to the technical condition evaluation criteria for road bridges (JTG/T H21-2011).
Step S212, obtaining the safety condition characterization values based on the structure appearance data through the following formulas
The first safety state result of the bridge superstructure is:
the first safety state result of the bridge substructure is:
the first safety state result of the bridge deck system is as follows:
wherein, PCCI'qBCCI 'as a safety status result of the q-th component of the bridge superstructure'mDCCI 'as a safety status result of m-th component of bridge substructure'nIs the safety state result, B ', of the n-th bridge surface component'q、B'm、B'nThe weight values, PCCI ', of the corresponding parts of the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure'p、BCCI'p、DCCI'pRespectively representing safety condition characterization values corresponding to the pth indexes of all parts in the upper part structure, the lower part structure and the bridge deck system of the bridge obtained on the basis of the structure appearance data, bp1、bp2、bp3Weighting values of the p-th indexes of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, Q, M, N the quantities of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, and s the quantity of the indexes included in the structural appearance data;
step S213, obtaining the safety condition characterization values based on the structural mechanics response data through the following formulas
The second safety state result of the bridge superstructure is:
the second safety state result of the bridge substructure is:
the result of the second safety state of the bridge deck system is as follows:
wherein, PCCI "qSafety status results for the qth part of the bridge superstructure, BCCI "mDCCI, a safety status result for the mth component of the bridge substructure "nAs a result of the safety state of the nth component of the bridge surface system, B "q、B”m、B”nThe weight values, PCCI', of the parts in the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure "f、BCCI"f、DCCI"fRespectively representing safety condition characterization values corresponding to the f index of each part in the upper structure, the lower structure and the bridge deck system of the bridge obtained based on structural mechanics response data, bf1、bf2、bf3The f-th indexes of the parts in the bridge upper structure, the bridge lower structure and the bridge deck system respectively relate to the weight values of structural mechanical response data, and t is the number of indexes included in the structural mechanical response data.
Preferably, in step S22, the comprehensive safety state results of the bridge superstructure, the bridge substructure and the bridge deck system are obtained by the following formulas:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3XBDCI ", formula III
Wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data on the influence of the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively.
Preferably, in step S3, a full-bridge safety state result is obtained according to the following formula according to the comprehensive safety state result of the bridge superstructure, the bridge substructure and the bridge deck system:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSBequation four
Wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state. Preferably, the value of each weighted value is determined according to the evaluation standard of the technical condition of the highway bridge, preferably WDValue of 0.2, WSPValue of 0.4, WSBThe value is 0.4.
Specifically, the weight value of each index related to each factor, the weight value of each factor influencing the safety state of the bridge structure, and the weight value of each index influencing the safety state of the bridge structure in the bridge structure safety state evaluation model are obtained in the following manner.
Qualitatively determining the structural appearance data and the structural mechanical response data as two factors influencing the safety state of the bridge structure, and qualitatively determining each data included in the structural appearance data and the structural mechanical response data as an index;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
step 1, comparing every two important degrees of all indexes related to structural appearance factors or structural internal force factors, comparing every two important degrees of the structural appearance factors and the structural internal force factors related to bridge structure safety state evaluation, and constructing a judgment matrix by using a ratio of the important degrees of the two factors;
wherein the scale of comparison is shown in Table 2,
TABLE 2
| Scale | Means of |
| 1 | Indicating that the two factors are of equal importance |
| 3 | Indicating that the former is slightly more important than the latter |
| 5 | Indicating that the former is significantly more important than the latter in comparison |
| 7 | Indicating that the former is more important than the latter |
| 9 | Indicating that the former is extremely important than the latter in comparison |
| 2，4，6，8 | Intermediate value representing the above-mentioned adjacent judgment |
| Reciprocal of the | If the ratio of the importance of the factors i, j is aijThen the ratio of the importance of i, j is aji＝1/aij |
In order to improve the accuracy of the comparison of the importance degree, the consistency of the judgment matrix needs to be checked, which is specifically as follows:
calculating to obtain the maximum eigenvalue of the absolute value of the judgment matrix, and taking the positive value lambdamax；
And (3) calculating the consistency of the judgment matrix:
CI＝(λmax-n)/(n-1)，
if the CI is 0, judging that the matrix has complete consistency, and finishing the inspection; if CI ≠ 0, further calculation is required, specifically:
if CR < 0.1, then the inconsistency of the judgment matrix is considered to be acceptable; otherwise, the value of the elements of the judgment matrix is readjusted until the requirement is met.
The value of RI is shown in table 3, where n is the order of the determination matrix.
TABLE 3
| n | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| RI | 0 | 0 | 0.58 | 0.90 | 1.12 | 1.24 | 1.32 | 1.41 | 1.45 | 1.49 | 1.51 |
Step 2, calculating to obtain corresponding eigenvectors by using the characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the bridge structure safety state, and further obtaining corresponding weight values, namely the weight values of the structural appearance factor and the structural internal force factor which influence the bridge structure safety state and the weight values of each index respectively related to the structural appearance factor and the structural internal force factor;
and 3, calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
For example, the structural safety state of a certain highway hollow slab bridge is monitored, the safety condition characteristic values of all indexes of corresponding parts of the bridge superstructure, the bridge substructure and the bridge deck system based on structural appearance data and the weight values of all the parts related to the corresponding bridge structure, and the safety condition characteristic values of all the indexes in the corresponding parts of the bridge superstructure based on structural mechanics response data and the weight values of all the indexes related to the bridge superstructure are shown in the following table:
TABLE 1
Table 1 is based on data obtained by monitoring the structural safety state of a certain highway hollow slab bridge; the detection data in table 1 correspond to structural appearance data obtained by manual visual inspection or by means of a portable instrument measurement mode, and the monitoring data correspond to structural mechanical response data obtained by measurement of sensing equipment arranged on the bridge.
The natural frequency in table 1 is obtained by fourier transforming the acquired acceleration data; the transverse correlation coefficient index is obtained by calculating the structural acceleration of two adjacent beams.
For example, in the monitoring of the structural safety state of the highway hollow slab bridge, part of the indexes have no influence on the structural safety state result of the highway hollow slab bridge, and therefore, corresponding index data is not measured, and secondly, the weight value of the influence of the part of the indexes (the part of the index data which is not listed in table 1) obtained by using the analytic hierarchy process on the structural safety state of the highway hollow slab bridge is far smaller than the weight value of the influence of other indexes (the part of the index data which is listed in table 1) on the structural safety state of the highway hollow slab bridge, so that the indexes which have little influence on the structural safety state of the highway hollow slab bridge can be ignored, the monitoring cost is reduced while the monitoring reliability is ensured, and the structural safety state of the highway hollow slab bridge is monitored based on the index data listed in table 1.
Specifically, in the third formula, for the bridge superstructure, the influence weight of the structural appearance data on the bridge structure safety state is 0.33, and the influence weight of the structural mechanics response data on the bridge structure state is 0.67, so a1Value is 0.33, a'1The value is 0.67; since the structural mechanical response data of the bridge substructure and the bridge deck are not monitored, the influence weight of the structural appearance data on the bridge structure safety state is 1 and the influence weight of the structural mechanical response data on the bridge structure state is 0 for the bridge substructure and the bridge deck, and therefore, a2、a3Value is 1, a'2、a'3The value is 0.
As can be seen from the table, only a portion of the component index data is listed, for this case, illustratively, the lower structural component bridge abutment has only the defect level index and its corresponding weight is 0.3, then the weight value of the bridge abutment defect level index with respect to the structural mechanical response data is 1, and 0.3 is the weight value of the component bridge abutment with respect to the bridge lower structure safe state.
Based on table 1, the structural safety status results of the bridge superstructure, substructure and bridge deck based on the structural appearance data are obtained according to formula one:
respectively obtaining a first safety state result of the bridge superstructure by the following formula according to the safety condition characterization value obtained based on the structure appearance data:
the first safety state result of the bridge substructure is:
the first safety state result of the bridge deck system is as follows:
the safety condition characterization values obtained based on the structural mechanics response data are respectively obtained through the following formulas
The second safety state result of the bridge superstructure is:
considering that only the upper bearing part of the bridge superstructure has a structural strain index and a natural vibration frequency index, and the common bearing part has a transverse correlation coefficient index, the weight of each part on the safety state of the bridge superstructure is not considered, and the weights of the three indexes on the safety state of the bridge superstructure are only considered, so that the second safety state result of the bridge superstructure is as follows;
SPCI"＝PCCI'upper bearing strain×bUpper bearing strain+PCCI'Upper load-bearing self-vibration×bUpper load-bearing self-vibration
+PCCI'General load-bearing transverse direction×bGeneral load-bearing transverse direction
＝100×0.5+100×0.25+100×0.25
＝100
The second safety state result of the bridge substructure is:
the result of the second safety state of the bridge deck system is as follows:
and respectively obtaining comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge according to a formula III:
SPCI＝a1×SPCI'+a'1×SPCI”＝0.33×97.85+0.67×100＝99.29，
SBCI＝a2×SBCI'+a'2×SBCI”＝77.16，
BDCI＝a3×BDCI'+a'3×BDCI”＝90.22，
and obtaining a full-bridge structure safety state monitoring result according to a formula IV:
Dr＝SPCI×0.4+SBCI×0.4+BDCI×0.2
＝99.29×0.4+77.16×0.4+90.22×0.2
＝88.624，
and determining the structural safety level of the bridge according to the monitoring result and the bridge structural safety level index.
Compared with the prior art, the method for monitoring the safety state of the full-bridge structure provided by the invention has the advantages that on one hand, the adopted data not only comprise the structural apparent data of the bridge to be monitored, but also comprise the structural mechanical response data of the bridge to be monitored, and meanwhile, the intuitiveness of the structural apparent data and the real-time property of the structural mechanical response data are considered, so that the reliability of the safety monitoring result of the bridge structure is improved; on the other hand, the comprehensive safety evaluation state of each part of the bridge structure is obtained through the weighted values of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, and the monitoring result of the safety state of the full-bridge structure is obtained according to the comprehensive safety evaluation state of each part of the bridge structure and the weighted values of the influence of each part of the bridge structure on the safety state of the full-bridge structure, so that the safe, multi-angle, multi-level and omnibearing monitoring on the full-bridge structure is realized, the monitoring efficiency and the reliability of the monitoring result are improved, and the.
In another embodiment of the present invention, a full-bridge safety status monitoring system based on multi-source data corresponding to any of the above monitoring method embodiments is disclosed, as shown in fig. 3, including
The acquisition device is used for acquiring structure apparent data and structure mechanical response data of the full-bridge structure to be evaluated, and comprises a portable measuring instrument and sensing equipment; the structural apparent data comprises one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data comprises one or more of structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement; the portable measuring instrument is used for collecting the structural appearance data, and the sensing equipment is used for collecting the structural mechanical response data;
illustratively, the strain sensor and the acceleration sensor are respectively used for measuring and obtaining the strain and the acceleration of the structure, and the transverse correlation coefficient is obtained according to the strain or acceleration data of the structure, and other internal force parameters of the structure can also be obtained through the measurement of the corresponding sensing equipment.
The processing device is used for acquiring comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and the acquired structure mechanical response data; and obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system.
Preferably, the processing device obtains the safety state monitoring result of the full-bridge structure through the following processes:
step 1, obtaining first structure safety state results of an upper structure, a lower structure and a bridge deck system of a bridge according to structure appearance data, and obtaining second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to structure mechanical response data;
and 2, respectively obtaining comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge through the following formulas based on the results:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3×BDCI”，
wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data influencing the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively;
and 3, obtaining a safety state result of the full-bridge structure according to the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge through the following formula:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSB，
wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state.
Preferably, the structure appearance data and the structure mechanical response data are qualitatively determined as two factors influencing the safety state of the bridge structure, and the data included in the structure appearance data and the structure mechanical response data are qualitatively determined as indexes;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
comparing the importance degrees of the indexes on the structural appearance factors or the structural internal force factors pairwise, comparing the importance degrees of the structural appearance factors and the structural internal force factors on the bridge structure safety state evaluation pairwise, and constructing a judgment matrix by using the ratio of the importance degrees of the two factors;
calculating to obtain corresponding eigenvectors by using a characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the safety state of the bridge structure, and further obtaining corresponding weight values;
and calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
The above system embodiment and the method embodiment are based on the same inventive concept, and the same points can be referred to each other.
Compared with the prior art, the full-bridge structure safety state monitoring system provided by the invention has the advantages that on one hand, the adopted data not only comprise the structure appearance data of the bridge to be monitored, but also comprise the structure mechanics response data of the bridge to be monitored, and meanwhile, the intuitiveness of the structure appearance data and the real-time property of the structure mechanics response data are considered, so that the reliability of the bridge structure safety monitoring result is improved; on the other hand, the comprehensive safety evaluation state of each part of the bridge structure is obtained through the weighted values of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, and the monitoring result of the safety state of the full-bridge structure is obtained according to the comprehensive safety evaluation state of each part of the bridge structure and the weighted values of the influence of each part of the bridge structure on the safety state of the full-bridge structure, so that the safe, multi-angle, multi-level and omnibearing monitoring on the full-bridge structure is realized, the monitoring efficiency and the reliability of the monitoring result are improved, and the.
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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A full-bridge structure safety state monitoring method based on multi-source data is characterized by comprising the following steps:
acquiring structure appearance data and structure mechanical response data of a full bridge to be evaluated;
respectively obtaining comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and structure mechanical response data;
and obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system.
2. The method for monitoring the safety state of the full-bridge structure according to claim 1, wherein the structural appearance data comprises one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data comprises one or more of structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement;
measuring and obtaining the defect degree, the concrete strength degradation degree, the steel bar corrosion degree and the steel bar protective layer thickness by a portable instrument; and the structural strain, the transverse correlation coefficient, the structural acceleration, the structural deflection, the cable force, the fatigue stress, the temperature and the displacement are obtained by arranging sensing equipment on the bridge for measurement.
3. The method for monitoring the safety state of the full-bridge structure according to claim 2, wherein the evaluation model of the safety state of the bridge structure obtains the comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge through the following procedures:
obtaining first structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure apparent data, and obtaining second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanical response data;
and obtaining the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge according to the weight values of the structural apparent data and the structural mechanical response data on the influence of the safety state of the bridge structure based on the results.
4. The method for monitoring the safety state of the full-bridge structure according to claim 3, wherein the obtaining the first structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure appearance data and the second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanics response data comprises:
one or more data included in the structural appearance data correspond to one or more indexes, one or more data included in the structural mechanical response data correspond to one or more indexes, and safety condition characterization values of the indexes of the corresponding parts of the upper structure, the lower structure and the bridge deck system of the bridge are obtained according to the structural appearance data and the structural mechanical response data respectively;
respectively obtaining a first safety state result of the bridge superstructure by the following formula according to the safety condition characterization value obtained based on the structure appearance data:
the first safety state result of the bridge substructure is:
the first safety state result of the bridge deck system is as follows:
wherein, PCCI'qBCCI 'as a safety status result of the q-th component of the bridge superstructure'mDCCI 'as a safety status result of m-th component of bridge substructure'nIs the safety state result, B ', of the n-th bridge surface component'q、B'm、B'nThe weight values, PCCI ', of the corresponding parts of the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure'p、BCCI'p、DCCI'pRespectively representing safety condition characterization values corresponding to the pth indexes of all parts in the upper part structure, the lower part structure and the bridge deck system of the bridge obtained on the basis of the structure appearance data, bp1、bp2、bp3Weighting values of the p-th indexes of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, Q, M, N the quantities of the parts in the upper structure, the lower structure and the bridge deck system of the bridge respectively, and s the quantity of the indexes included in the structural appearance data;
the safety condition characterization values obtained based on the structural mechanics response data are respectively obtained through the following formulas
The second safety state result of the bridge superstructure is:
the second safety state result of the bridge substructure is:
the result of the second safety state of the bridge deck system is as follows:
wherein, PCCI "qSafety status results for the qth part of the bridge superstructure, BCCI "mDCCI, a safety status result for the mth component of the bridge substructure "nAs a result of the safety state of the nth component of the bridge surface system, B "q、B"m、B"nThe weight values, PCCI', of the parts in the bridge superstructure, substructure and deck system with respect to the corresponding bridge structure "f、BCCI"f、DCCI"fRespectively representing safety condition characterization values corresponding to the f index of each part in the upper structure, the lower structure and the bridge deck system of the bridge obtained based on structural mechanics response data, bf1、bf2、bf3The f-th indexes of the parts in the bridge upper structure, the bridge lower structure and the bridge deck system respectively relate to the weight values of structural mechanical response data, and t is the number of indexes included in the structural mechanical response data.
5. The method for monitoring the safety state of the full-bridge structure according to claim 4, wherein the comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge are obtained by the following formulas respectively:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3×BDCI”，
wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data on the influence of the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively.
6. The method according to claim 5, wherein the full-bridge structure safety state result is obtained from the integrated safety state results of the bridge superstructure, substructure and bridge deck system by the following formula:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSB，
wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state.
7. The full-bridge structure safety state monitoring method according to any one of claims 2 to 6, characterized in that structural appearance data and structural mechanical response data are qualitatively identified as two factors affecting the safety state of the bridge structure, and each data included in the structural appearance data and the structural mechanical response data is qualitatively identified as an index;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
comparing the importance degrees of the indexes on the structural appearance factors or the structural internal force factors pairwise, comparing the importance degrees of the structural appearance factors and the structural internal force factors on the bridge structure safety state evaluation pairwise, and constructing a judgment matrix by using the ratio of the importance degrees of the two factors;
calculating to obtain corresponding eigenvectors by using a characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the safety state of the bridge structure, and further obtaining corresponding weight values;
and calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
8. A full-bridge structure safety state monitoring system based on multi-source data is characterized by comprising
The acquisition device is used for acquiring structure apparent data and structure mechanical response data of the full-bridge structure to be evaluated, and comprises a portable measuring instrument and sensing equipment; the structural apparent data comprises one or more of defect degree, concrete strength degradation degree, steel bar corrosion degree and steel bar protective layer thickness, and the structural mechanical response data comprises one or more of structural strain, transverse correlation coefficient, structural acceleration, structural deflection, cable force, fatigue stress, temperature and displacement; the portable measuring instrument is used for collecting the structural appearance data, and the sensing equipment is used for collecting the structural mechanical response data;
the processing device is used for acquiring comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by utilizing the established bridge structure safety state evaluation model according to the acquired structure appearance data and the acquired structure mechanical response data; and obtaining the safety state monitoring result of the full-bridge structure based on the weight of the upper bridge structure, the lower bridge structure and the bridge deck system in the safety state of the full-bridge structure and the comprehensive safety state result of the upper bridge structure, the lower bridge structure and the bridge deck system.
9. The system for monitoring the safe state of the full-bridge structure according to claim 8, wherein the processing means performs the following procedures to obtain the safe state monitoring result of the full-bridge structure:
obtaining first structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure apparent data, and obtaining second structure safety state results of the upper structure, the lower structure and the bridge deck system of the bridge according to the structure mechanical response data;
and obtaining comprehensive safety state results of the upper structure, the lower structure and the bridge deck system of the bridge by the following formulas respectively based on the results:
SPCI＝a1×SPCI'+a'1×SPCI”，
SBCI＝a2×SBCI'+a'2×SBCI”，
BDCI＝a3×BDCI'+a'3×BDCI”，
wherein, a1、a2、a3Respectively is a 'weight value of the influence of the structure apparent data on the safety state of the bridge superstructure, the substructure and the bridge deck system'1、a'2、a'3The weight values of the structural mechanics response data influencing the safety states of the upper structure, the lower structure and the bridge deck system of the bridge are respectively;
and obtaining a full-bridge structure safety state result according to the comprehensive safety state results of the upper part structure, the lower part structure and the bridge deck system of the bridge through the following formula:
Dr＝BDCI×WD+SPCI×WSP+SBCI×WSB，
wherein Dr is the evaluation result of the safety state of the full-bridge structure, WDIs the weight value of the bridge deck system in the safety state of the full-bridge structure, WSPWeight value of superstructure in full bridge safety state, WSBThe weight value of the infrastructure in the full bridge safety state.
10. The full-bridge structure safety state monitoring system according to any one of claims 8 and 9, characterized in that structure appearance data and structure mechanical response data are characterized as two factors affecting the safety state of the bridge structure, and each data included in the structure appearance data and the structure mechanical response data is characterized as an index;
obtaining the weight value of the influence of each index on the safety state of the bridge structure by an analytic hierarchy process, which specifically comprises the following steps:
comparing the importance degrees of the indexes on the structural appearance factors or the structural internal force factors pairwise, comparing the importance degrees of the structural appearance factors and the structural internal force factors on the bridge structure safety state evaluation pairwise, and constructing a judgment matrix by using the ratio of the importance degrees of the two factors;
calculating to obtain corresponding eigenvectors by using a characteristic equation corresponding to the judgment matrix, normalizing the eigenvectors to obtain weight vectors of each index relative to the structural appearance factor or the structural internal force factor and the structural appearance factor or the structural internal force factor relative to the safety state of the bridge structure, and further obtaining corresponding weight values;
and calculating the weight value of the influence of each index on the safety state of the bridge structure by using the corresponding weight value through the following formula:
wherein, a "1、a"2Respectively the weight value of the influence of the structural apparent data and the structural mechanical response data on the safety state of the bridge structure, bipFor the weight of the p-th indicator in the structural appearance factor with respect to the i-th factor, bifAnd (4) weighting the weight value of the f index relative to the i factor in the structural internal force factors.
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Address after: 050011 No.36 Jianshe South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Applicant after: Hebei transportation planning and Design Institute Co.,Ltd. Applicant after: Hebei Ruizhi Traffic Technology Consulting Co.,Ltd. Address before: 050011 No.36 Jianshe South Street, Shijiazhuang City, Hebei Province Applicant before: HEBEI PROVINCIAL COMMUNICATIONS PLANNING AND DESIGN INSTITUTE Applicant before: Hebei Ruizhi Traffic Technology Consulting Co.,Ltd. |
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Address after: 050011 No.36 Jianshe South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Applicant after: Hebei transportation planning and Design Institute Co.,Ltd. Applicant after: Hebei Traffic Planning Institute Ruizhi Traffic Technology Consulting Co.,Ltd. Address before: 050011 No.36 Jianshe South Street, Qiaoxi District, Shijiazhuang City, Hebei Province Applicant before: Hebei transportation planning and Design Institute Co.,Ltd. Applicant before: Hebei Ruizhi Traffic Technology Consulting Co.,Ltd. |
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