CN204027842U - A kind of system identifying bridge structure stiffness injury - Google Patents
A kind of system identifying bridge structure stiffness injury Download PDFInfo
- Publication number
- CN204027842U CN204027842U CN201420181530.6U CN201420181530U CN204027842U CN 204027842 U CN204027842 U CN 204027842U CN 201420181530 U CN201420181530 U CN 201420181530U CN 204027842 U CN204027842 U CN 204027842U
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- bridge
- displacement meter
- external load
- bringing device
- bridge structure
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Abstract
The utility model discloses a kind of system identifying bridge structure stiffness injury belonging to bridge structure field of engineering technology.This system comprises external load bringing device and displacement meter; Described external load bringing device is arranged on the force part of bridge; Described displacement meter mounted in pairs is at the care cross section lower edge at bridge force-bearing position; It is 8 right that the number of described displacement meter on every bridge beam is at least; Described external load bringing device is lifting jack.Compared with prior art, the Dynamic System of identification bridge structure stiffness injury described in the utility model is simple, result accurately and reliably, be easy to be grasped by engineering technical personnel, quick detecting appraisal when being applicable to the Quality Identification in bridge and Structural Engineering construction and operation process or occurring damage or worsen.
Description
Technical field
The utility model belongs to bridge structure field of engineering technology, specifically, relates to a kind of system identifying bridge structure stiffness injury.
Background technology
Bridge structure is due to the discreteness of the material of structure own, and the damage accumulation of operation stage in later stage, the practical stiffness of structure can have very big difference with design load, cause structure generation internal force status off-design state, particularly structural damage accumulates the internal force redistribution caused, safety and the permanance of structure will be had a strong impact on, bring many uncertain factors also to the safety assessment of structure, degree of injury and stress thereof therefore how accurately to grasp existing highway bridge are factors the most key in bridge security assessment simultaneously.
The system and method for evaluation bridge damnification state conventional at present mainly contains: (1) is based on the Evaluation Method of specification, the method is based on the criterion calculation such as " Highway bridge technique status assessment standard ", " Existing Highway Bridges Bearing Capacity Evaluation code " and " highway bridge Maintenance specification ", the method is the empirical evaluation method of point different levels, different weight, but namely has internal force status then cannot make rational judgement for the quantitative evaluation of the degree of injury of structure and structure; (2) loading test method, the method totally compares with the relation of design point the state of the art of bridge mainly through load action, for the geometric properties in certain cross section concrete and degree of injury then helpless.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of system identifying bridge structure stiffness injury, be applicable to bridge and Structural Engineering construction and operation process in Quality Identification or occur damage or worsen time quantitative detecting appraisal.
A kind of system identifying bridge structure stiffness injury described in the utility model, described system is for identifying that bridge 1 rigidity of structure is damaged, and this system comprises external load bringing device 2 and displacement meter 3, and described external load bringing device 2 is arranged on the force part of bridge 1; Described displacement meter 3 mounted in pairs is at the care cross section lower edge of bridge 1 force part.
A kind of system identifying bridge structure stiffness injury described in the utility model, it is 8 right that the number of described displacement meter 3 on every bridge beam 1 is at least.
A kind of system identifying bridge structure stiffness injury described in the utility model, described external load bringing device 2 is live load or loading equipemtn.Described loading equipemtn is lifting jack.
In use, can carry out in accordance with the following steps: (1), according to the loading characteristic of structure to be detected, at care cross section lower edge mounted in pairs displacement meter, between every two displacement meters is one and calculates damage unit; (2) in structure to be tested, apply external load, and measure the shift value loading each controlling sections in front and back with displacement meter, angular displacement is also tried to achieve by differential principle; (3) element stiffness matrix of each unit is calculated; (4) impairment parameter of each element stiffness is supposed, integrated damage stiffness matrix; (5) damage stiffness matrix conversion is formed damage displacement array, and the iterative equation of structure damage displacement array; (6) solve the value of each displacement array, and calculate each impairment parameter value.
Compared with prior art, the Dynamic System of identification bridge structure stiffness injury described in the utility model is simple, result accurately and reliably, be easy to be grasped by engineering technical personnel, quick detecting appraisal when being applicable to the Quality Identification in bridge and Structural Engineering construction and operation process or occurring damage or worsen.
Accompanying drawing explanation
Fig. 1: the system schematic identifying bridge structure stiffness injury; Fig. 2: element stiffness matrix K
eand overall damage stiffness matrix K e (ξ) calculates schematic diagram; Fig. 3: iterative equation Fe calculates schematic diagram; Fig. 4: containing the overall damage stiffness equation schematic diagram of two unit; 1-bridge, 2-external load bringing device, 3-displacement meter.
Embodiment
Be described further below in conjunction with the system of specific embodiment to identification bridge structure stiffness injury described in the utility model, but protection domain of the present utility model is not limited to this.
Embodiment 1
Identify a bridge structure stiffness injury's system, described system is for identifying that bridge 1 rigidity of structure is damaged, and this system comprises external load bringing device 2 and displacement meter 3, and described external load bringing device 2 is arranged on the force part of bridge 1; Described displacement meter 3 mounted in pairs is at the care cross section lower edge of bridge 1 force part; The number of described displacement meter 3 on every bridge beam 1 is 8 right; Described external load bringing device 2 is live load or lifting jack.
In use, can carry out in accordance with the following steps: (1), according to the loading characteristic of structure to be detected, at care cross section lower edge mounted in pairs displacement meter, between every two displacement meters is one and calculates damage unit; (2) in structure to be tested, apply external load, and measure the shift value loading each controlling sections in front and back with displacement meter, angular displacement is also tried to achieve by differential principle; (3) the element stiffness matrix K of each unit is calculated
e; (4) impairment parameter of each element stiffness is supposed, overall damage stiffness matrix K
e(ξ); (5) damage stiffness matrix conversion is formed damage displacement array, and the iterative equation F of structure damage displacement array
e=K
e(ξ) Δ
e; (6) solve the value of each displacement array, and calculate each impairment parameter value, according to (5) step result, in conjunction with the displacement measured result under each operating mode, first can try to achieve impairment parameter ξ.Parameter declaration: E-test structure elasticity modulus of materials, unit: MPa; A-area of section, unit: mm
2; I-cross sectional moment of inertia, unit: mm
4; L-element length, unit: mm; ξ
istiffness injury's coefficient of the-the i-th # unit; F
xstructural equivalents joint load (or the unit rod end power in element stiffness matrix) in-Bulk stiffness matrix, unit can be: KN, KN*m.Now calculate for two unit, computation process and result are shown in Fig. 2,3,4 and table 1 respectively.
Table 1
Compared with prior art, the Dynamic System of identification bridge structure stiffness injury described in the utility model is simple, result accurately and reliably, be easy to be grasped by engineering technical personnel, quick detecting appraisal when being applicable to the Quality Identification in bridge and Structural Engineering construction and operation process or occurring damage or worsen.
Claims (1)
1. one kind identifies the system of bridge structure stiffness injury, it is characterized in that, described system is for identifying that bridge (1) rigidity of structure is damaged, this system comprises external load bringing device (2) and displacement meter (3), and described external load bringing device (2) is arranged on the force part of bridge (1); Described displacement meter (3) mounted in pairs is at the care cross section lower edge of bridge (1) force part; It is 8 right that the number of described displacement meter (3) on every bridge beam (1) is at least; Described external load bringing device (2) is lifting jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181530.6U CN204027842U (en) | 2014-04-15 | 2014-04-15 | A kind of system identifying bridge structure stiffness injury |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181530.6U CN204027842U (en) | 2014-04-15 | 2014-04-15 | A kind of system identifying bridge structure stiffness injury |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204027842U true CN204027842U (en) | 2014-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420181530.6U Expired - Fee Related CN204027842U (en) | 2014-04-15 | 2014-04-15 | A kind of system identifying bridge structure stiffness injury |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204027842U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122109A (en) * | 2014-08-01 | 2014-10-29 | 山西省交通科学研究院 | System for identifying rigidity damage of bridge structure |
| CN105067359A (en) * | 2015-07-24 | 2015-11-18 | 山西省交通科学研究院 | Bridge load test loading position molding instrument |
| CN111157200A (en) * | 2017-01-25 | 2020-05-15 | 松下知识产权经营株式会社 | Rigidity measuring device and rigidity measuring method |
-
2014
- 2014-04-15 CN CN201420181530.6U patent/CN204027842U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122109A (en) * | 2014-08-01 | 2014-10-29 | 山西省交通科学研究院 | System for identifying rigidity damage of bridge structure |
| CN105067359A (en) * | 2015-07-24 | 2015-11-18 | 山西省交通科学研究院 | Bridge load test loading position molding instrument |
| CN105067359B (en) * | 2015-07-24 | 2017-12-05 | 山西省交通科学研究院 | A kind of Test on Bridge Loading loading position lofting instrument |
| CN111157200A (en) * | 2017-01-25 | 2020-05-15 | 松下知识产权经营株式会社 | Rigidity measuring device and rigidity measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20190415 |