CN111926722A - Method and system for identifying and maintaining structural cracks of reinforced concrete bridge - Google Patents
Method and system for identifying and maintaining structural cracks of reinforced concrete bridge Download PDFInfo
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- CN111926722A CN111926722A CN202010725832.5A CN202010725832A CN111926722A CN 111926722 A CN111926722 A CN 111926722A CN 202010725832 A CN202010725832 A CN 202010725832A CN 111926722 A CN111926722 A CN 111926722A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
Abstract
The invention discloses a method and a system for identifying and maintaining a structural crack of a reinforced concrete bridge, which relate to the field of highway traffic, and the method comprises the steps of formulating a quantitative judgment standard of the structural crack based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length; comprehensively detecting the bridge to be detected, and recording the crack characteristics of each crack on the reinforced concrete bridge; comparing the recorded crack characteristics of each crack with a structural crack quantitative evaluation standard to judge whether the current crack is a structural crack or not; and treating the structural cracks by adopting a reinforcing and strengthening mode, and treating the non-structural cracks by adopting a closed crack mode. The method can effectively improve the accuracy of structural crack identification and the pertinence of maintenance schemes.
Description
Technical Field
The invention relates to the field of highway traffic, in particular to a method and a system for identifying and maintaining a crack of a reinforced concrete bridge structure.
Background
The reinforced concrete bridge is the bridge type which is most widely applied to roads in China and is the most common bridge type with crack diseases. In case the structural crack appears in the bridge, if untimely maintenance, constantly develop under the vehicle load repetitive action, crack width constantly increases, and length constantly prolongs, and quantity constantly increases, leads to the continuous reduction of bridge bearing capacity, seriously influences bridge structure safety. The competent departments of the traffic industry in China pay great attention to the bridge safety, and require daily patrol, periodic inspection and special inspection so as to find diseases in time, eliminate the diseases in time and ensure the safety of the bridge structure and the life and property safety of people to the maximum extent.
The bridge member cracks mainly have two forms, one is caused by stress and belongs to structural cracks, and once the cracks occur, the cracks can continuously develop under the repeated action of vehicle load, so that the safety of the bridge is influenced. The other is non-structural crack caused by non-stress, including concrete temperature shrinkage crack, dry shrinkage crack, steel bar rust expansion crack, concrete frost expansion crack, shrinkage crack caused by untimely curing of concrete, and the like. The non-structural cracks have little influence on the bearing capacity of the bridge, but can influence the durability of the bridge and reduce the service life of the bridge. The two forms of cracks have different reasons and different influences on the technical condition of the bridge.
The existing 'evaluation standard for technical conditions of highway bridges' (JTG/T H21-2011) in China adopts a method for detecting two elements of length and width of cracks and detecting the depth of the cracks under special conditions to evaluate the influence of the cracks on the technical conditions of the bridges, and the method is not comprehensive enough and is difficult to avoid causing misjudgment.
Although the national standard has relevant regulations on methods for maintaining, detecting and monitoring highway bridges and plays an important role in evaluating the technical conditions of the bridges, the method has defects in analyzing the causes of bridge crack diseases and analyzing the influences on the bearing capacity or service life of the bridges. For example, for bridge crack diseases, the length and the width of the crack are mainly detected, the depth of the crack is detected under special conditions, and the technical conditions of the bridge are analyzed and classified according to the crack depth. The method cannot comprehensively and accurately reflect the influence of the cracks on the safety of the bridge structure, and is difficult to avoid causing misjudgment so as to influence the maintenance of the bridge.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method and a system for identifying and maintaining a reinforced concrete bridge structure crack, which can effectively improve the accuracy of structure crack identification and the pertinence of a maintenance scheme.
In order to achieve the above purpose, the invention provides a reinforced concrete bridge structure crack identification and maintenance method, which comprises the following steps:
setting a quantitative judgment standard of the structural crack based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length;
comprehensively detecting the bridge to be detected, and recording the crack characteristics of each crack on the reinforced concrete bridge;
comparing the recorded crack characteristics of each crack with a structural crack quantitative evaluation standard to judge whether the current crack is a structural crack or not;
and treating the structural cracks by adopting a reinforcing and strengthening mode, and treating the non-structural cracks by adopting a closed crack mode.
On the basis of the technical proposal, the device comprises a shell,
the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge;
the bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
On the basis of the technical scheme, the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge.
On the basis of the technical proposal, the device comprises a shell,
the included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees;
the crack location of the structural crack is located at a maximum tensile stress or a maximum shear stress of the bridge member.
On the basis of the technical scheme, the recorded crack characteristics of each crack are compared with the quantitative judgment standard of the structural crack to judge whether the current crack is the structural crack, and the method specifically comprises the following steps:
comparing the recorded crack characteristics of each crack with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
The invention provides a reinforced concrete bridge structure crack identification and maintenance system, which comprises:
the structure crack quantitative evaluation module is used for evaluating the structure crack quantitative evaluation standard based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length;
the recording module is used for recording the crack characteristics of each crack on the reinforced concrete bridge after the bridge to be detected is comprehensively detected;
the judging module is used for comparing the crack characteristics of each crack recorded by the recording module with the quantitative judging standard of the structural crack so as to judge whether the current crack is the structural crack or not;
and the processing decision module is used for processing the structural cracks in a reinforcing and reinforcing mode and processing the non-structural cracks in a closed crack mode.
On the basis of the technical proposal, the device comprises a shell,
the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge;
the bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
On the basis of the technical scheme, the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge.
On the basis of the technical proposal, the device comprises a shell,
the included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees;
the crack location of the structural crack is located at a maximum tensile stress or a maximum shear stress of the bridge member.
On the basis of the technical scheme, the crack characteristics of each crack recorded by the recording module are compared with the quantitative judgment standard of the structural crack so as to judge whether the current crack is the structural crack, and the specific process comprises the following steps:
comparing the crack characteristics of each crack recorded by the recording module with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
Compared with the prior art, the invention has the advantages that: the structural cracks and the non-structural cracks are distinguished by formulating a quantitative judgment standard of the structural cracks based on crack characteristics, so that misjudgment caused by evaluating the technical condition of the bridge according to two factors of length and width is avoided, the accuracy of structural crack identification and the pertinence of a maintenance scheme are improved, and meanwhile, the automatic diagnosis of the types and the severity of crack diseases can be realized.
Drawings
FIG. 1 is a flow chart of a method for identifying and repairing cracks of a reinforced concrete bridge structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a reinforced concrete bridge structure crack identification and maintenance system in an embodiment of the invention.
Detailed Description
The embodiment of the invention provides a method for identifying and maintaining structural cracks of a reinforced concrete bridge, which is used for formulating a quantitative judgment standard of the structural cracks based on crack characteristics so as to distinguish the structural cracks from non-structural cracks, improve the accuracy of bridge technical condition evaluation and adopt different maintenance schemes aiming at different types of cracks. The embodiment of the invention correspondingly provides a system for identifying and maintaining the structural cracks of the reinforced concrete bridge.
The present invention will be described in further detail with reference to the accompanying drawings and examples. As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Referring to fig. 1, the method for identifying and maintaining the crack of the reinforced concrete bridge structure provided by the embodiment of the invention comprises the following steps:
s1: and formulating a quantitative judgment standard of the structural crack based on the crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length.
In the embodiment of the invention, the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge. The bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
In the embodiment of the invention, a quantitative judgment standard of a structural crack is established by using four factors of the position, the direction, the width and the length of the crack generated on a reinforced concrete bridge, a non-structural crack is distinguished, and the influence of the crack on the technical condition of the bridge is evaluated, wherein the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge, so that the crack type is determined and is used as an important factor for evaluating the technical grade of the bridge.
S2: and comprehensively detecting the bridge to be detected, and recording the crack characteristics of each crack on the reinforced concrete bridge. After the bridge to be detected is comprehensively detected, quantitatively describing crack characteristics of each detected crack according to four factors of position, direction, width and length, and then inputting the crack characteristics into a standardized form so as to facilitate analysis and processing by a computer. The bridge to be detected in the embodiment of the invention is a reinforced concrete bridge.
S3: and comparing the recorded crack characteristics of each crack with the structural crack quantitative evaluation standard to judge whether the current crack is a structural crack. And comparing to judge whether the current crack is a structural crack or not, wherein the process is carried out by a computer.
In the embodiment of the invention, the recorded crack characteristics of each crack are compared with the quantitative judgment standard of the structural crack to judge whether the current crack is the structural crack, and the method specifically comprises the following steps:
comparing the recorded crack characteristics of each crack with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
In the embodiment of the invention, the included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees. The crack location of the structural crack is located at the maximum tensile stress or the maximum shear stress of the bridge member. Along with the extension of the service life of the bridge, the generated structural cracks gradually extend to two ends, and the number of the cracks is increased from 1 to a plurality.
As for the forming reasons of different types of cracks in the embodiment of the invention, bridge members deform under the action of vehicle load, and crack occurs when the strain value exceeds the allowable strain value of concrete, and the crack gradually expands along with the prolonging of the service time, so that the bearing capacity of the bridge is reduced, and safety accidents are caused in serious cases. The structural crack is caused by stress on the bridge member, firstly occurs at the position with the maximum tensile stress or shear stress, then expands towards the periphery, and has definite directionality. The non-structural cracks are caused by steel bar rusty expansion, temperature shrinkage deformation, dry shrinkage deformation and the like, and the positions and the directions of the non-structural cracks are related to the factors and have certain randomness.
Different forms of cracks have different maintenance schemes, once the structural cracks occur, the bearing capacity of the bridge is reduced, and therefore reinforcement is needed to restore the bearing capacity; the non-structural cracks, such as cracks caused by reinforcement rust expansion, concrete temperature shrinkage deformation, dry shrinkage deformation and the like, namely the non-structural cracks have little influence on the bearing capacity of the bridge, but influence on the durability of the bridge, and protective measures for closing the cracks are required to prevent the continuous deterioration of the concrete caused by the infiltration of air and moisture.
S4: and treating the structural cracks by adopting a reinforcing and strengthening mode, and treating the non-structural cracks by adopting a closed crack mode. For example, for a transverse structural crack of a bottom plate of a bridge box girder, carbon fiber cloth or a steel plate is adhered for reinforcement; for non-structural cracks caused by reinforcement bar corrosion and expansion, firstly, loose parts and dust on two sides of the cracks are removed completely, and then an epoxy resin adhesive sealing treatment mode is adopted. And the bridge cracks are treated, so that the concrete is prevented from being further cracked or the durability of the bridge is prevented from being influenced.
With the development of artificial intelligence technology, bridge maintenance develops towards automation and intellectualization, so that intelligent diagnosis and decision-making in the aspects of conventional concrete beam bridge maintenance and reinforcement, whole life cycle maintenance planning, preventive maintenance and the like can be realized by applying modern technology. The main determining factor of the technical condition and the bearing capacity of the bridge is structural damage, and the durability of the bridge structure is mainly influenced by non-structural damage. In order to realize intelligent diagnosis and decision of bridge maintenance, diseases are classified according to structural diseases and non-structural diseases, and reliable quantitative indexes are determined according to the characteristics of the diseases at different parts of a bridge under different stress conditions, so that the diseases can be automatically identified and acquired by a computer, and intelligent diagnosis and decision can be further realized. By adopting the method for identifying and maintaining the structural cracks of the reinforced concrete bridge, the structural cracks and the non-structural cracks are distinguished, misjudgment caused by evaluating the technical condition of the bridge according to the length and the width is avoided, the accuracy of identifying the structural cracks and the pertinence of a maintenance scheme are improved, and meanwhile, the method can realize automatic diagnosis of the types and the severity of crack diseases by a computer.
The following describes an application of the reinforced concrete bridge structure crack identification and repair method according to the embodiment of the invention with reference to three specific examples.
Example one
A certain intercommunicating ramp bridge adopts 2x20+20.3 reinforced concrete continuous box girders, a box girder web plate has a vertical crack near a support, the width of the crack reaches 0.1mm, the length of the crack exceeds 1.2m, and the crack is defined according to two factors of the width and the length, so that the structural crack or the non-crack is difficult to judge.
Under the combined action of shear stress and bending stress, the support at the end of the continuous box girder bridge can cause overlarge main tensile stress of a web plate, an inclined crack is generated when the main tensile stress exceeds the ultimate tensile strength of concrete, and the included angle between the crack and the horizontal plane is 30-60 degrees.
According to the stress characteristics of a box girder bridge web, determining the quantitative judgment standard of the structural crack of the crack according to four factors of crack occurrence position, direction, length and width as follows: the width is more than or equal to 0.1mm, the length is more than or equal to 50cm, and the included angle between the direction and the horizontal plane is 30-60 degrees.
The characteristic of the bridge crack is described according to four elements of the position, the length, the width and the direction of the invention as follows: width of 0.1mm, length of 120cm, and included angle of 90 deg. between direction and horizontal plane
And comparing the bridge cracks described by the four elements with the structural crack judgment standard of the part, and judging that the included angle between the crack direction and the horizontal plane is not within the judgment standard.
Example two
A certain highway super-large bridge has the bridge deck full width of 24.5m, the bridge length of 960m and the bridge span combination of 4820 m continuous small box girder bridge with the girder height of 110 cm.
After the bridge is put into operation for 10 years, a plurality of transverse cracks appear on the bottom plate of the box girder, the width of the cracks is about 0.1mm, if the characteristics of the cracks are described and the cracks are judged according to two factors of length and width, the width of the cracks is not over-limit, and the cracks are easily judged to be non-structural cracks by mistake.
The cracks are generated at the bottom plate, the midspan and the peripheral part of the box girder and belong to a tensile stress area; the direction is vertical to the length direction of the box girder and vertical to the direction of main tensile stress; the length of the crack is 80-100 cm, and the width of the crack is approximately equal to 0.1 mm. According to the four elements of the invention, analysis and evaluation are carried out, and the crack at the part is judged to be a structural crack.
EXAMPLE III
The whole width of a bridge deck of a large bridge of a certain highway is 12m, the bridge length is 60m, the bridge span and diameter combination is 3 multiplied by 20mT beams, when the large bridge is put into operation for 3 years, a plurality of transverse cracks appear at the lower part of the end of a No. 2 pier capping beam, the width of the cracks is about 0.2mm, and steel bar rust is found locally.
According to the four-element analysis of the invention, the bottom of the bent cap is subjected to the action of the transverse bridge compressive stress and the vertical shear stress, the main stress of the bottom of the bent cap is a negative value, and the crack position is not in a tensile stress area, which indicates that the crack is not caused by stress. The actual investigation finds that the crack is consistent with the direction of the anti-cracking steel bar, and the steel bar rust appears locally, which also proves that the crack is a non-structural crack.
According to the method for identifying and maintaining the structural cracks of the reinforced concrete bridge, the structural cracks and the non-structural cracks are distinguished by making the quantitative judgment standard of the structural cracks based on the crack characteristics, so that misjudgment caused by the evaluation of the technical conditions of the bridge according to the length and the width is avoided, the accuracy of structural crack identification and the pertinence of a maintenance scheme are improved, and meanwhile, the automatic diagnosis of the types and the severity of crack diseases can be realized.
Referring to fig. 2, the reinforced concrete bridge structure crack identification and maintenance system provided by the embodiment of the invention comprises a making module, a recording module, a judging module and a processing and decision-making module.
The making module is used for making a quantitative judgment standard of the structural crack based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length; the recording module is used for recording the crack characteristics of each crack on the reinforced concrete bridge after the bridge to be detected is comprehensively detected; the judging module is used for comparing the crack characteristics of each crack recorded by the recording module with the quantitative judging standard of the structural crack so as to judge whether the current crack is the structural crack or not; and the processing decision module is used for processing the structural cracks in a reinforcing and reinforcing mode and processing the non-structural cracks in a closed crack mode.
In the embodiment of the invention, the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge; the bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
In the embodiment of the invention, the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge. The included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees; the crack location of the structural crack is located at the maximum tensile stress or the maximum shear stress of the bridge member.
In the embodiment of the invention, the crack characteristics of each crack recorded by the recording module are compared with the quantitative judgment standard of the structural crack to judge whether the current crack is the structural crack, and the specific process comprises the following steps:
comparing the crack characteristics of each crack recorded by the recording module with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A method for identifying and maintaining a crack of a reinforced concrete bridge structure is characterized by comprising the following steps:
setting a quantitative judgment standard of the structural crack based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length;
comprehensively detecting the bridge to be detected, and recording the crack characteristics of each crack on the reinforced concrete bridge;
comparing the recorded crack characteristics of each crack with a structural crack quantitative evaluation standard to judge whether the current crack is a structural crack or not;
and treating the structural cracks by adopting a reinforcing and strengthening mode, and treating the non-structural cracks by adopting a closed crack mode.
2. The reinforced concrete bridge structure crack identification and maintenance method of claim 1, characterized in that:
the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge;
the bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
3. The reinforced concrete bridge structure crack identification and maintenance method of claim 1, characterized in that: the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge.
4. The reinforced concrete bridge structure crack identification and maintenance method of claim 3, characterized in that:
the included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees;
the crack location of the structural crack is located at a maximum tensile stress or a maximum shear stress of the bridge member.
5. The reinforced concrete bridge structure crack identification and maintenance method of claim 4, characterized in that: comparing the recorded crack characteristics of each crack with a structural crack quantitative evaluation standard to judge whether the current crack is a structural crack, and the method specifically comprises the following steps:
comparing the recorded crack characteristics of each crack with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
6. The utility model provides a reinforced concrete bridge structures crack discernment maintenance system which characterized in that includes:
the structure crack quantitative evaluation module is used for evaluating the structure crack quantitative evaluation standard based on crack characteristics, wherein the crack characteristics comprise a crack position, a crack direction, a crack width and a crack length;
the recording module is used for recording the crack characteristics of each crack on the reinforced concrete bridge after the bridge to be detected is comprehensively detected;
the judging module is used for comparing the crack characteristics of each crack recorded by the recording module with the quantitative judging standard of the structural crack so as to judge whether the current crack is the structural crack or not;
and the processing decision module is used for processing the structural cracks in a reinforcing and reinforcing mode and processing the non-structural cracks in a closed crack mode.
7. The reinforced concrete bridge structure crack identification and maintenance system of claim 6, wherein:
the reinforced concrete bridge comprises a common reinforced concrete bridge and a prestressed reinforced concrete bridge;
the bridge upper structure of the reinforced concrete bridge is a reinforced hollow slab, a prestressed hollow slab, a T beam, a box beam, a continuous beam or a continuous rigid frame.
8. The reinforced concrete bridge structure crack identification and maintenance system of claim 6, wherein: the crack position and the crack direction are used for judging whether the crack is a structural crack caused by stress, and the crack width and the crack length are used for judging the damage degree of the bridge.
9. The reinforced concrete bridge structure crack identification and maintenance system of claim 8, wherein:
the included angle between the crack direction of the structural crack and the maximum main stress direction of the bridge is 75-105 degrees;
the crack location of the structural crack is located at a maximum tensile stress or a maximum shear stress of the bridge member.
10. The reinforced concrete bridge structure crack identification and maintenance system of claim 9, wherein: comparing the crack characteristics of each crack recorded by the recording module with the quantitative judgment standard of the structural crack to judge whether the current crack is the structural crack, wherein the specific process comprises the following steps:
comparing the crack characteristics of each crack recorded by the recording module with the quantitative judgment standard of the structural crack, and judging whether the crack characteristics of the current crack accord with the quantitative judgment standard of the structural crack:
if so, judging that the current crack is a structural crack;
if not, judging that the current crack is an unstructured crack.
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| CN112709158A (en) * | 2020-12-25 | 2021-04-27 | 钟运涛 | Bridge maintenance process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502053A (en) * | 2020-11-20 | 2021-03-16 | 浙江新创建高速公路有限公司 | Bridge maintenance disease recording, identifying and treatment measure guiding method |
| CN112709158A (en) * | 2020-12-25 | 2021-04-27 | 钟运涛 | Bridge maintenance process |
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