CN113761640B - Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method - Google Patents
Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method Download PDFInfo
- Publication number
- CN113761640B CN113761640B CN202111204275.3A CN202111204275A CN113761640B CN 113761640 B CN113761640 B CN 113761640B CN 202111204275 A CN202111204275 A CN 202111204275A CN 113761640 B CN113761640 B CN 113761640B
- Authority
- CN
- China
- Prior art keywords
- dial indicator
- measuring
- electromechanical
- electromechanical dial
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000011156 evaluation Methods 0.000 title claims abstract description 24
- 238000005259 measurement Methods 0.000 claims description 51
- 239000000725 suspension Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 238000000691 measurement method Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 238000005305 interferometry Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000002079 cooperative effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/10—Constructive solid geometry [CSG] using solid primitives, e.g. cylinders, cubes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Computational Mathematics (AREA)
- Civil Engineering (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Architecture (AREA)
- Computer Graphics (AREA)
- Software Systems (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and a method, wherein a digital display inclinometer is connected with an electromechanical dial indicator; one end of the sleeve is sleeved outside the measuring rod of the electromechanical dial indicator and connected with the clamping sleeve; the lower end of the connecting rod is arranged in the inner cavity of the sleeve, and the upper end of the connecting rod penetrates through the upper bottom of the sleeve; the lower end of the connecting rod is propped against the end part of the electromechanical dial indicator measuring rod, and the electromechanical dial indicator measuring rod is in a pressed state; a tension spring is connected between the lower end of the connecting rod and the lower bottom of the sleeve; the electromechanical dial indicator is rotationally connected with the measuring platform; the rotating shafts of the electromechanical dial indicators of the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are coplanar. According to the invention, the horizontal displacement and the vertical displacement on the bridge girder in the transverse direction and the longitudinal direction are measured through a plurality of measuring devices, and the three-dimensional deformation quantity of the bridge, which is generated in the rotation process, can be calculated through geometric calculation, so that the precision is high, the equipment is simple and convenient, and the interference caused by external factors is small.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a three-dimensional deformation real-time test system and method for bridge anti-overturning bearing capacity evaluation.
Background
Road traffic construction is a very important link in a three-dimensional traffic network, and as traffic volume increases, the road traffic construction is challenged greatly. At present, the contradiction between the increase of the traffic demand and the shortage of construction land is remarkable, and the single-column pier girder bridge has the advantages of land occupation reduction, strong adaptability to complex sites, economy, beautiful appearance and the like, and is widely applied to the construction of roads and urban bridges at home and abroad. Therefore, reasonable construction of the single-pier bridge has important social and economic significance for promoting intensive utilization of land resources and realizing the aim of three-dimensional traffic construction. In recent years, accidents of overturning of a single pier girder bridge caused by passing a bridge by a heavy vehicle are reported frequently, and huge losses of manpower, material resources and financial resources are caused. The bridge overturning is a process that under the action of unbalanced load of an overload automobile, the unidirectional compression support is sequentially emptied, and the bridge is unbalanced due to failure of boundary conditions. How to accurately measure the three-dimensional deformation of the bridge under the action of an overload vehicle is an important index for accurately evaluating the anti-overturning bearing capacity of the bridge. The prior art at present mostly focuses on the measurement of vertical deformation of bridges. The testing method of vertical deformation (deflection) mainly comprises a dial indicator method, a bracket method, a hanging hammer method, a photoelectric imaging measurement method, an inclinometer measurement method, a communicating pipe method, a millimeter radar wave measurement method, a GPS dynamic measurement method, a laser measurement method, a ground microwave interferometry method and the like. The bridge three-dimensional deformation real-time measurement can be realized by a millimeter radar wave measurement method, a GPS dynamic measurement method, a laser measurement method, a ground microwave interferometry method and the like. However, the dynamic measurement of the GPS is still limited in the range of 10-20 mm, the measurement precision of the ground micro-deformation interferometry radar (GB-tadar) is obviously influenced by an atmospheric medium, the measurement precision of the laser scanning measurement method is rapidly reduced along with the increase of the sight distance, the night vision measurement cannot be realized, and the real-time measurement precision of the bridge deformation based on machine vision is obviously influenced by external environments such as illumination, temperature and the like. The equipment has high cost and is easily limited by the number of measuring points, the use environment, the economy and other factors.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a three-dimensional deformation real-time test system and method for evaluating the bridge anti-overturning bearing capacity based on contact measurement.
The technical scheme adopted by the invention is as follows:
The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system comprises a measurement device, wherein the measurement device comprises a measurement platform and a plurality of electromechanical dial indicator measurement assemblies;
The measuring platform is of a rigid and symmetrical structure and is provided with a vertical symmetrical plane;
The electromechanical dial indicator measuring assembly comprises an electromechanical dial indicator, a sleeve, a connecting rod and a digital display inclinometer, wherein the digital display inclinometer is connected with the electromechanical dial indicator, and one coordinate axis of the digital display inclinometer is parallel to the axis of a measuring rod of the electromechanical dial indicator; one end of the sleeve is sleeved outside the measuring rod of the electromechanical dial indicator and is connected with the clamping sleeve of the electromechanical dial indicator; the lower end of the connecting rod is arranged in the inner cavity of the sleeve, and the upper end of the connecting rod penetrates through the upper bottom of the sleeve; the lower end of the connecting rod is propped against the end part of the electromechanical dial indicator measuring rod, and the electromechanical dial indicator measuring rod is in a pressed state; a tension spring is connected between the lower end of the connecting rod and the lower bottom of the sleeve, and the tension spring is in a stretched state;
The electromechanical dial indicator is rotationally connected with the measuring platform, the rotation plane of the electromechanical dial indicator is a vertical symmetry plane of the measuring platform, and the rotating shaft of the electromechanical dial indicator is coaxial with the rotating shaft of the electromechanical dial indicator pointer;
the electromechanical dial indicator measuring assembly comprises a first electromechanical dial indicator measuring assembly, a second electromechanical dial indicator measuring assembly and a third electromechanical dial indicator measuring assembly, wherein the first electromechanical dial indicator measuring assembly is arranged in the middle of the measuring platform, and the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are symmetrically arranged on two sides of the first electromechanical dial indicator measuring assembly; the rotating shafts of the electromechanical dial indicators of the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are coplanar.
Preferably, the upper end of the connecting rod is provided with a through hole, and the connecting rod is connected with a lifting rope through the through hole.
Preferably, the three-dimensional deformation real-time testing system for evaluating the anti-overturning bearing capacity of the bridge further comprises a plane calibration plate, wherein the plane calibration plate is arranged above the measuring platform and fixedly connected with the measuring platform, the plane calibration plate is coplanar with the vertical symmetry plane of the measuring platform, a plane calibration structure is arranged on the plane calibration plate, and the plane calibration structure is used for calibrating that all lifting ropes are positioned in the vertical symmetry plane of the measuring platform.
Preferably, the plane calibration structure comprises a first laser torch, a second laser torch and a level bubble, wherein the first laser torch and the second laser torch are both rotationally connected with the plane calibration plate, the rotating shafts of the first laser torch and the second laser torch are perpendicular to the plane calibration plate, and light beams emitted by the first laser torch and the second laser torch are located in the vertical symmetrical plane of the measurement platform.
Preferably, the bottom of the measuring platform is provided with a column base with adjustable length.
Preferably, the measuring platform adopts a truss structure.
Preferably, the signal processor, the signal amplifier and the data processing unit are all connected with the signal processor, the signal processor is connected with the signal amplifier, and the signal amplifier is connected with the data processing unit.
Preferably, the connecting rod is provided with a scale for calibrating the pretension force of the tension spring.
Preferably, the connecting rod comprises a rod body and a cylinder, wherein the lower end of the rod body is connected with the upper end of the cylinder, the rod body and the cylinder are coaxial, the diameter of the rod body is smaller than that of the cylinder, the cylinder is positioned in the inner cavity of the sleeve, the rod body penetrates through the upper bottom surface of the sleeve, and clearance fit is formed between the cylinder and the sleeve.
The invention also provides a bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test method, which is carried out by adopting the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system, and comprises the following steps:
Arranging a measuring device:
Arranging at least three measuring devices, and connecting a lifting rope at the upper end of a connecting rod of each electromechanical dial indicator measuring assembly of each measuring device;
hanging a connecting lifting rope on a first electromechanical dial indicator measuring assembly and a second electromechanical dial indicator measuring assembly of each measuring device at a first hanging point of a girder of a bridge, and hanging a connecting lifting rope on a third electromechanical dial indicator measuring assembly at a second hanging point of the girder of the bridge; the lifting ropes connected to the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are positioned in the same vertical plane;
The hanging points of the hanging ropes connected with the two measuring devices are arranged along the longitudinal direction of the main beam, and the two measuring devices are respectively positioned at two lateral sides of the main beam; the suspension points of the lifting ropes connected to the other measuring device are arranged along the transverse direction of the main beam, and the two suspension points of the measuring device are overlapped with one suspension point of the first two measuring devices;
all the lifting ropes are in a tensioning state before and after measurement;
Collecting and processing data:
Collecting measurement data of each digital display inclinometer and an electromechanical dial indicator in real time; and calculating the three-dimensional deformation of the main beam by using the acquired measurement data.
The invention has the following beneficial effects:
In the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system, a first electromechanical dial indicator measuring assembly, a second electromechanical dial indicator measuring assembly and a third electromechanical dial indicator measuring assembly are arranged on a measuring device, each electromechanical dial indicator measuring assembly is provided with a digital display inclinometer, and one measuring device can measure the horizontal displacement and the vertical displacement of two points at the same section on a bridge girder through all electromechanical dial indicators and the digital display inclinometers, so that in practical application, the horizontal displacement and the vertical displacement on the bridge girder in the transverse direction and the longitudinal direction are measured through a plurality of measuring devices, and the three-dimensional deformation quantity generated in the bridge rotation process can be calculated through geometric calculation; the electromechanical dial indicator and the digital inclinometer are adopted, so that the measurement can be performed in real time, the real-time performance is good, meanwhile, the measurement precision of the two devices is high and the two devices belong to common equipment, so that the measurement precision is high, the equipment is simple and convenient, the cost is low, and meanwhile, the two devices are less influenced by external factors, so that the whole measurement system is less influenced by the external factors.
Drawings
FIG. 1 is an overall schematic diagram of a bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system of the invention when applied;
FIG. 2 is an overall schematic diagram of the measuring device of the present invention;
Fig. 3 (a) is an elevation view of the measurement platform and the electromechanical dial indicator assembly according to the embodiment of the present invention after being connected, fig. 3 (b) is a side view of the measurement platform and the electromechanical dial indicator assembly according to the embodiment of the present invention after being connected, and fig. 3 (c) is a plan view of the measurement platform and the electromechanical dial indicator assembly according to the embodiment of the present invention after being connected;
FIG. 4 is a three-dimensional perspective view of a measurement platform according to an embodiment of the present invention;
FIG. 5 is a detailed view of the planar alignment in an embodiment of the present invention;
FIG. 6 is a three-dimensional block diagram of an electromechanical dial indicator assembly in accordance with an embodiment of the present invention;
FIG. 7 is a cross-sectional view of an electromechanical dial assembly in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of three-dimensional deformation measurement according to an embodiment of the present invention;
FIG. 9 is an illustration of a three-dimensional deformation measurement system for bridge overturning in accordance with an embodiment of the present invention;
FIG. 10 is a block diagram of a combination of a electromechanical dial indicator assembly and a measurement platform in an embodiment of the present invention;
FIG. 11 is a schematic diagram showing the connection of the upper and lower legs according to an embodiment of the present invention;
FIG. 12 is a three-dimensional view of a lifting screw in accordance with an embodiment of the present invention;
Fig. 13 (a) is an elevation view showing the cooperative effect of the plurality of measuring devices according to the embodiment of the present invention, and fig. 13 (b) is a bottom view showing the cooperative effect of the plurality of measuring devices according to the embodiment of the present invention;
In the figure, 1-girder, 2-single pier, 3-lifting rope, 4-measuring device, 5-signal processor, 6-signal amplifier, 7-notebook computer, 8-data line, 9-lower chord, 10-diagonal, 11-upper chord, 12-digital inclinometer, 13-sleeve, 14-stay, 15-laser torch, 16-plane calibration plate, 17-upright post, 18-middle shaft, 19-needle sheath, 20-electromechanical dial indicator, 21-connecting rod, 22-U type groove, 23-pin shaft, 24-upper column foot, 25-lower column foot, 26-lifting screw, 27-fixed screw, 28-tension spring, 29-through hole, 30-vertical rod, 31-level bubble, 32-scale.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Referring to fig. 1 to 4,6, 7 and 10, the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system comprises a measuring device 4, wherein the measuring device 4 comprises a measuring platform and a plurality of electromechanical dial indicator measuring components; the measuring platform is of a rigid and symmetrical structure and is provided with a vertical symmetrical plane; the electromechanical dial indicator measuring assembly comprises an electromechanical dial indicator 20, a sleeve 13, a connecting rod 21 and a digital display inclinometer 12, wherein the digital display inclinometer 12 is connected with the electromechanical dial indicator 20, and one coordinate axis of the digital display inclinometer 12 is parallel to the axis of a measuring rod of the electromechanical dial indicator 20; one end of the sleeve 13 is sleeved outside the measuring rod of the electromechanical dial indicator 20 and is connected with the clamping sleeve of the electromechanical dial indicator 20; the lower end of the connecting rod 21 is arranged in the inner cavity of the sleeve 13, and the upper end of the connecting rod 21 penetrates through the upper bottom of the sleeve 13; the lower end of the connecting rod 21 is propped against the end part of the measuring rod of the electromechanical dial indicator 20, and the measuring rod of the electromechanical dial indicator 20 is in a pressed state; a tension spring 28 is connected between the lower end of the connecting rod 21 and the lower bottom of the sleeve 13, and the tension spring 28 is in a stretched state; the electromechanical dial indicator 20 is rotationally connected with the measuring platform, the rotation plane of the electromechanical dial indicator 20 is a vertical symmetry plane of the measuring platform, and the rotating shaft of the electromechanical dial indicator 20 is coaxial with the rotating shaft of the pointer of the electromechanical dial indicator 20; the electromechanical dial indicator measuring assembly comprises a first electromechanical dial indicator measuring assembly, a second electromechanical dial indicator measuring assembly and a third electromechanical dial indicator measuring assembly, wherein the first electromechanical dial indicator measuring assembly is arranged in the middle of the measuring platform, and the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are symmetrically arranged on two sides of the first electromechanical dial indicator measuring assembly; the axes of rotation of the first, second, and third electromechanical dial gauges 20 are coplanar.
As a preferred embodiment of the present invention, referring to fig. 7, the upper end of the link 21 is provided with a through hole 29, the link 21 is connected with the hoist rope 3 through the through hole 29, the connection between the link 21 and the hoist rope 3 can be facilitated through the through hole 29, and the through hole 29 is located at the end, so that the hoist rope 3 can be prevented from applying a bending moment to the link 21.
As a preferred embodiment of the present invention, referring to fig. 2 to 5, the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system of the present invention further includes a planar calibration plate 16, the planar calibration plate 16 is disposed above the measurement platform and is fixedly connected with the measurement platform, the planar calibration plate 16 is coplanar with the vertical symmetry plane of the measurement platform, and a planar calibration structure is disposed on the planar calibration plate 16, and is used for calibrating that all lifting ropes 3 are located in the vertical symmetry plane of the measurement platform. Through plane calibration board 16 and plane calibration structure, in order to make all lifting rope 3 be in measuring platform's vertical symmetry plane on the one hand, on the other hand can calibrate measuring platform and guarantee that its vertical symmetry plane is in vertical state when the installation, all be in order to guarantee the measurement effect.
As a preferred embodiment of the present invention, referring to fig. 2 and 10, the plane alignment structure includes a first laser torch, a second laser torch and a level bubble 31, where the first laser torch and the second laser torch are rotatably connected to the plane alignment plate 16, the rotation axes of the first laser torch and the second laser torch are perpendicular to the plane alignment plate 16, and the light beams emitted by the first laser torch and the second laser torch are located in the vertical symmetry plane of the measurement platform. Wherein the measuring platform can be adjusted by using the level bubble 31, so that the rotating shafts of the electromechanical dial indicators of the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are in the same horizontal plane; the first laser torch and the second laser torch can rotate, so that whether all the lifting ropes 3 are positioned in the vertical symmetry plane of the measuring platform can be checked by using the first laser torch and the second laser torch, and the hanging points of the lifting ropes 3 can be adjusted by laser emitted by the first laser torch and the second laser torch, so that the requirement that whether all the lifting ropes 3 are positioned in the vertical symmetry plane of the measuring platform is met.
As a preferred embodiment of the invention, the bottom of the measuring platform is provided with the column feet with adjustable length, so that the pose of the measuring platform is convenient to adjust, the vertical symmetry plane of the measuring platform is in the vertical direction, and meanwhile, the rotating shafts of the electromechanical dial indicators of the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are coplanar.
As a preferred embodiment of the invention, the measuring platform adopts a truss structure, has the characteristics of good rigidity and light weight, can meet the rigidity requirement, and is convenient to carry and transport. During measurement, the lower chord member at the bottom of the measurement platform is subjected to weight treatment by selecting stones and the like on site, so that the lower chord member is kept stable and does not move in the measurement process.
As a preferred embodiment of the invention, the signal processor 5, the signal amplifier 6 and the data processing unit, all the digital inclinometers 12 and all the electromechanical dialmeters 20 are connected to the signal processor 5, the signal processor 5 is connected to the signal amplifier 6, and the signal amplifier 6 is connected to the data processing unit.
As a preferred embodiment of the invention, the connecting rod 21 is provided with a scale 32 for calibrating the pretension of the tension spring 28.
As a preferred embodiment of the present invention, referring to fig. 7, the connecting rod 21 includes a rod body and a cylinder, the lower end of the rod body is connected with the upper end of the cylinder, the rod body and the cylinder are coaxial, the diameter of the rod body is smaller than that of the cylinder, the cylinder is located in the inner cavity of the sleeve 13, the rod body penetrates through the upper bottom surface of the sleeve 13, and the cylinder is in clearance fit with the sleeve 13, so that the coaxiality among the connecting rod 21, the sleeve 13 and the measuring rod of the electromechanical dial indicator 20 can be ensured, and the measurement accuracy is ensured.
The invention also provides a bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test method, which is carried out by adopting the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system, and comprises the following steps:
the arrangement measuring device 4:
at least three measuring devices 4 are arranged, and a lifting rope 3 is connected to the upper end of a connecting rod 21 of each electromechanical dial indicator measuring assembly of each measuring device 4;
Hanging the connecting lifting rope 3 on the first electromechanical dial indicator measuring assembly and the second electromechanical dial indicator measuring assembly of each measuring device 4 at a first hanging point of the girder 1 of the bridge, and hanging the connecting lifting rope 3 on the third electromechanical dial indicator measuring assembly at a second hanging point of the girder 1 of the bridge; the lifting ropes 3 connected to the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are positioned in the same horizontal and vertical plane;
Of the three measuring devices 4, the suspension points of the lifting ropes 3 connected to two measuring devices 4 are arranged along the longitudinal direction of the main beam 1, and the two measuring devices 4 are respectively positioned at two lateral sides of the main beam 1; the suspension points of the lifting ropes 3 connected to the other measuring device 4 are arranged along the transverse direction of the main beam 1, and the two suspension points of the measuring device 4 are overlapped with one suspension point of the first two measuring devices 4;
all the lifting ropes 3 are in a tensioning state before and after measurement;
Collecting and processing data:
collecting measurement data of each digital display inclinometer 12 and the electromechanical dial indicator 20 in real time; and calculating the three-dimensional deformation of the main beam 1 by using the acquired measurement data.
Examples
The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system of the embodiment comprises a lifting rope 3, a measuring device 4, a data line 8, a signal processor 5, a signal amplifier 6 and a notebook computer 7, and is shown in fig. 1.
The invention is commonly used for three-dimensional deformation measurement of the single-column pier bridge, wherein the main beam 1 is the main beam of the single-column pier bridge, and a cast-in-place concrete box beam or a steel box beam is commonly adopted.
The lifting rope 3 adopts a rope structure, adopts an iron wire or carbon fiber bundle material with the elastic modulus more than or equal to 2.05X10 11 Pa, and has the diameter of 1-1.8 mm.
The measuring device 4 comprises a measuring platform, a digital display inclinometer 12, a laser torch 15 and an electromechanical dial indicator 20, and is shown in detail in fig. 2. The measuring platform adopts a truss structure and comprises 7 lower chords 9, 12 diagonal rods 10, 10 upper chords 11, 2 vertical rods 30, 4 supporting rods 14, 3 middle shafts 18, 1 plane calibration plate 16, 1 level bubble 31 and 2 upright posts 17, and is shown in fig. 3 (a) to 3 (c), the measuring platform is of a symmetrical structure, and is symmetrical in the left-right direction shown in fig. 3 (a), 3 (b) and 3 (c), the up-down direction shown in fig. 3 (c) is also symmetrical, and the vertical symmetry plane of the measuring platform is the plane passing through the neutral layer of the plane calibration plate shown in fig. 3 (b) and 3. The lower chord 9, the diagonal 10, the vertical rod 30 and the upper chord 11 are all 15mm in diameter and are in solid cylinder shapes and are made of high-strength carbon steel materials. The center shaft 18 has a diameter of 10mm and is in a solid cylinder shape and is made of high-strength carbon steel materials. The lower chord 9 is fixedly connected with the diagonal 10 and the vertical 30. The upper chord 11 is fixedly connected with the diagonal 10 and the vertical 30. The planar calibration plate 16 is a rectangular thick plate structure with the thickness of 10mm, and the surface of the high-strength carbon steel material is polished smoothly, as shown in fig. 3 (a) to 5. Two ends of the lower part of the plane calibration plate 16 are respectively fixedly connected with the upper chords 11 at the left and right ends shown in fig. 3 (a) through 2 upright posts 17. The upright 17 is of rectangular configuration. The two sides of the upright 17 are fixedly connected with the upper chord 11 through 4 stay bars 14, so that the stability of the upright 17 is improved, and the upright 17 is prevented from being excessively deformed under the action of external force. The center shaft 18 intersects with the upper chord 11 and the diagonal rod 10 at a point to form a spherical node structure. The middle shaft 18 clamps the electromechanical dial indicator 20 in a pin shaft mode, specifically, round holes or round grooves are formed in the positions of the two side surfaces of the electromechanical dial indicator 20 in the direction of the pointer rotating shaft, and the middle shaft 18 stretches into the round holes or the round grooves, so that rotary connection is formed between the electromechanical dial indicator 20 and the middle shaft 18. The electromechanical dial indicator 20 is rotatable 360 ° about the axis of the central shaft 18. The upper end of the plane calibration plate 16 is provided with a U-shaped groove 22, and 2 pin shafts 23 and 2 laser flashlights 15 are arranged in the U-shaped groove 22. The laser torch 15 is connected with the plane calibration plate 16 through a pin 23, the laser torch 15 can rotate freely around the pin 23, the rotation plane of the laser torch 15 and the plane calibration plate 16 are positioned in the same plane, and the detailed structure is shown in fig. 5. A vial 31 is provided centrally on the top surface of the planar calibration plate 16 for determining whether the measurement platform is in a flat condition.
The upper column base 24 and the lower column base 25 are of special-shaped cylinder structures, and are made of high-strength carbon steel materials, and the upper column base 24 contains the lower column base 25, as shown in fig. 2 and 11 in detail. The lower part of the measuring platform is fixedly connected with the upper column base 24 by adopting a fusion welding process. The bottom of the upper column base 24 is provided with a notch, and a single-side insection is arranged in the notch. The top of the lower column foot 25 is provided with a notch with a built-in unilateral insection. The upper column shoe 24 and the lower column shoe 25 are engaged with each other by a lifting screw 26. The lifting screw 26 is a geared knob assembly, as shown in detail in fig. 12. The relative lifting movement of the upper column shoe 24 and the lower column shoe 25 can be achieved by rotating the lifting screw 26. Two through holes are arranged on the upper column base 24 in the two vertical plane directions, the upper and lower staggered holes are 5cm, the upper through hole lifting screw 26 penetrates through the through holes, and the lower through hole fixing screw 27 penetrates through the through holes. The lifting screw 26 is used for adjusting the elevation of the column foot, i.e. the measuring platform, to be in a flat state, and the fixing screw 27 is used for fixing the relative positions of the upper column foot 24 and the lower column foot 25 so that the upper column foot and the lower column foot do not slide relatively.
Referring to fig. 6 to 7 in detail, the electromechanical dial indicator 20 is a common electromechanical dial indicator, and a pointer sleeve 19 fixedly connected with the shell is arranged at the lower part of the electromechanical dial indicator 20; the measuring rod of the electromechanical dial indicator 20 penetrates through the meter body, and the measuring head of the measuring rod is in contact connection with the connecting rod 21. The lower end of the pointer sleeve 19 is provided with a digital display inclinometer 12, the digital display inclinometer 12 is used for measuring the change of the inclination angle of the electromechanical dial indicator 20 and the lifting rope 3, and the digital display inclinometer 12 is fixedly connected with the pointer sleeve 19. The data line 8 extends out of the electromechanical dial indicator 20 and is connected with the signal processor 5.
The structure of the connecting rod 21 comprises a rod body and a column body, wherein the lower end of the rod body is connected with the upper end of the column body, the rod body and the column body are coaxial, the diameter of the rod body is smaller than that of the column body, the column body is positioned in the inner cavity of the sleeve 13, the rod body penetrates through the upper bottom surface of the sleeve 13, the connecting rod 21 is made of 2024-T351 aluminum alloy material, and the structure is shown in fig. 6. The upper rod body of the connecting rod 21 is provided with a through hole 29, the rod body can be connected with the lifting rope 3 through the through hole 29, the tension spring 28 is sleeved outside the measuring rod of the electromechanical dial indicator 20, and the lower end of the column body is fixedly connected with the upper end of the tension spring 28. The rod body surface of the connecting rod 21 is provided with a scale 32 for calibrating the pretension of the tension spring 28. The tension spring 28 is a cylindrical spiral spring with the diameter of 10-15 mm, adopts 60 Mn-70 Mn material specification, and has the rigidity coefficient of 50-200N/m; the lower part of the tension spring 28 is fixedly connected with the sleeve 13. The sleeve 13 is of a hollow structure and fixedly connected with the electromechanical dial indicator 20.
The signal processor 5 adopts KD6005 signal acquisition instrument often, and the data line of percentage table is connected to signal processor 5 to and signal side's big ware 6, and signal side's big ware 6 links to each other with notebook computer 7, and notebook computer 7 carries out data display and storage through Dasylab software.
The deformation calculation principle is shown in fig. 8, where L1, L3, and L4 are lengths of lines AB, CD, and ED under the condition that the main beam 1 is not deformed, and L2, L5, and L6 are lengths of lines AB ', CD ', and ED ' under the condition that the main beam 1 is deformed. The angles of inclination of the lines AB, CD, ED are the angles alpha, beta, gamma of the main beam 1 under the undeformed condition. Inclination angles of lines AB ', CD ', ED ' after deformation of the eta, theta and lambda main beam 1. When the measuring device (4) is adjusted, the measuring platform is in a flat state, the A, C, E three-point connecting line is parallel to the horizontal plane, the point A is used as an origin, the AE connecting line is used as an X axis, and the straight line passing through the point A and the plane of the AE vertical to the plane calibration plate 16 is used as a Y axis. L7 is the width of the cross section of the main beam 1, namely BD and B 'D', and the length of AB is consistent with the length of A 'B' before and after deformation because the influence of the load on the transverse dimension deformation of the main beam 1 is not great. Let AC, CE lengths be L8 and L9. Assuming that L7, L8, L9, α, β, γ are known, the main beam deformation calculation process is as follows:
L1, L3 and L4 are obtained through calculation in the formula (1), and then the elongation or shortening amount of the main beam 1 after deformation is measured according to a dial indicator at the position of A, C, E points, so that the length values of L2, L5 and L6 are obtained.
And calculating by the formula (2) to obtain values of eta, theta and lambda.
And (3) calculating to obtain relative displacement values |X BB'|、|YDD'|、|XDD '| and |Y DD' | of the points B and D after the deformation of the main beam.
The 1 measuring device 4 can only measure the horizontal displacement and the vertical displacement of two points at the same section, and simultaneously, the bottoms of the main beams 1 are placed by the plurality of measuring devices 4 to cooperatively work, so that the adjacent two measuring devices 4 are guaranteed to have 1 common intersection point, namely, the three-dimensional deformation quantity of the main beams generated in the rotation process under the action of the unbalanced load of the overload vehicle can be measured in real time according to the number of measuring points, and the details are shown in fig. 13 (a) and 13 (b).
In an actual dynamic load test, the suspension length of the lifting rope 3 is manually adjusted to apply the pre-tightening force of the spring, so that the iron wires are always in a tensioning state in the working process, the transverse rigidity of the iron wires is further increased, and the influence of external factors such as wind load and the like on the measurement accuracy is reduced. The method obtains dynamic deformation time-course curves of different positions and directions of the main beam by measuring the tensile deformation of the spring in real time, and the dynamic deformation time-course curves are shown in figure 9.
The measuring device 4 is a molded product, is manufactured in a factory, and adopts a high-precision machining instrument to ensure that the measuring device has high-precision dimensions.
The application process of the bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system of the embodiment is as follows:
Step 1, determining the position of a section (comprising a cross section and a vertical section) of a main beam to be tested under the action of static load; taking the cross section as an example, determining two corner points B and D on the edge of the web plate of the main beam positioned on the same section, and marking. The distance between the point B and the point D is the length of the bottom plate of the bridge section, and the distance can be obtained from a bridge design drawing or obtained by actual measurement. At the points B and D, 3 suspension ropes 3 are suspended, respectively, as shown in fig. 7 to 8.
And 2, simultaneously placing the measuring device 4 under the corresponding section, and opening the laser torch 15 on the plane calibration plate 16 to enable the two laser beam irradiation points to coincide with the corner points B and D, wherein the plane calibration plate 16 coincides with the main beam section surface. The lifting rope 3 is closely attached to the plane of the calibration plate 16 without bending.
And 3, connecting the lifting rope 3 with the through hole of the connecting rod 21 to ensure that the scale marks of the connecting rod 21 extending out of the top of the sleeve 13 are between 20N and 50N so as to ensure a certain pretightening force applied to the tension spring 28.
And 4, adjusting the lifting screw 26 and the fixing screw 27 to enable the bubble in the bubble 31 to be positioned at the middle position, wherein the plane of the measuring platform is in a horizontal state. At this point the planar calibration plate 16 is slightly tilted, the position of the measuring device 4 is fine-tuned, and step 2 and this step are repeated until the two laser beam irradiation points coincide exactly with the corner points B and D and the bubble in the vial 31 is in the neutral position. The measuring platform is now flat and the calibration plate 16 is vertical.
And 5, connecting the data wires 8 of the electromechanical dialgage 20 to the signal processor 5, sequentially connecting the signal processor 5, the signal amplifier 6 and the notebook computer 7, opening Daslab software, and setting data display and storage.
Step 6, the tilt reading of the initial digital inclinometer 12 below the electromechanical dial gauge 20 at point A, C, E is read. The distance of AC and CE are both calibrated at the factory of the device, as known.
And 7, measuring, displaying and storing displacement data of the point A and the point B in real time through dasylab software of a computer under the action of dynamic load. The relative horizontal and vertical displacement values of the point A and the point B in the measured plane can be estimated by using the formulas (1) to (3) through knowing the AC magnitude, the CE magnitude, the AB magnitude, the initial inclination angle of the digital display inclinometer 12 and the electromechanical dial indicator 20 magnitude measured in real time.
Similarly, the measuring devices 4 are arranged on other planes intersecting with ABCDE to work cooperatively, and the three-dimensional deformation of the main beam due to rotation under the action of unbalanced load of the overload vehicle can be measured in real time by repeating the steps 1 to 7, as shown in fig. 13 (a) and 13 (b).
According to the invention, the three-dimensional deformation of the bridge under the action of overload and unbalanced load of the overload automobile is measured in real time by arranging a plurality of measuring platforms with the electromechanical dial indicators. The invention has low cost, is easy to carry, is not easy to be interfered by external factors such as wind load and the like, has the measurement accuracy of 0.01mm, can accurately measure the three-dimensional dynamic deformation of a structure with the clearance height of 3-30 m under the bridge in the overturning process before collapse, and provides a reliable data source for bridge anti-overturning evaluation. Compared with a millimeter radar wave measuring method, a GPS dynamic measuring method, a laser measuring method and a ground microwave interferometry method, the method has the advantages of low cost, flexible disassembly, capability of realizing quick installation and real-time contact measurement, ensuring the accuracy of a measuring result, insusceptibility to external factors such as wind load and the like, extremely strong anti-interference performance, capability of realizing the dynamic real-time measurement of the three-dimensional large deformation of the bridge overturning, and data support for the evaluation of the bridge overturning bearing capacity by selecting different spring rigidities, sleeve lengths and large-range electromechanical dial indicators.
Claims (8)
1. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system is characterized by comprising a measuring device (4), wherein the measuring device (4) comprises a measuring platform and a plurality of electromechanical dial indicator measuring assemblies;
The measuring platform is of a rigid and symmetrical structure and is provided with a vertical symmetrical plane;
The electromechanical dial indicator measuring assembly comprises an electromechanical dial indicator (20), a sleeve (13), a connecting rod (21) and a digital display inclinometer (12), wherein the digital display inclinometer (12) is connected with the electromechanical dial indicator (20), and one coordinate axis of the digital display inclinometer (12) is parallel to the axis of a measuring rod of the electromechanical dial indicator (20); one end of the sleeve (13) is sleeved outside the measuring rod of the electromechanical dial indicator (20) and is connected with the clamping sleeve of the electromechanical dial indicator (20); the lower end of the connecting rod (21) is arranged in the inner cavity of the sleeve (13), and the upper end of the connecting rod (21) penetrates through the upper bottom of the sleeve (13); the lower end of the connecting rod (21) is propped against the end part of the measuring rod of the electromechanical dial indicator (20), and the measuring rod of the electromechanical dial indicator (20) is in a pressed state; a tension spring (28) is connected between the lower end of the connecting rod (21) and the lower bottom of the sleeve (13), and the tension spring (28) is in a stretching state;
The electromechanical dial indicator (20) is rotationally connected with the measuring platform, the rotation plane of the electromechanical dial indicator (20) is a vertical symmetry plane of the measuring platform, and the rotating shaft of the electromechanical dial indicator (20) is coaxial with the rotating shaft of the pointer of the electromechanical dial indicator (20);
The electromechanical dial indicator measuring assembly comprises a first electromechanical dial indicator measuring assembly, a second electromechanical dial indicator measuring assembly and a third electromechanical dial indicator measuring assembly, wherein the first electromechanical dial indicator measuring assembly is arranged in the middle of the measuring platform, and the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are symmetrically arranged on two sides of the first electromechanical dial indicator measuring assembly; the rotating shafts of the electromechanical dial indicators (20) of the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are coplanar;
the bottom of the measuring platform is provided with a column foot with adjustable length;
the measuring platform adopts a truss structure.
2. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system according to claim 1, wherein a through hole (29) is formed in the upper end of the connecting rod (21), and the connecting rod (21) is connected with a lifting rope (3) through the through hole (29).
3. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system according to claim 2, further comprising a planar calibration plate (16), wherein the planar calibration plate (16) is arranged above the measuring platform and fixedly connected with the measuring platform, the planar calibration plate (16) is coplanar with the vertical symmetry plane of the measuring platform, and a planar calibration structure is arranged on the planar calibration plate (16) and is used for calibrating that all lifting ropes (3) are positioned in the vertical symmetry plane of the measuring platform.
4. A bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system according to claim 3, wherein the plane calibration structure comprises a first laser torch, a second laser torch and a level bubble (31), the first laser torch and the second laser torch are both in rotary connection with the plane calibration plate (16), the rotary shafts of the first laser torch and the second laser torch are perpendicular to the plane calibration plate (16), and light beams emitted by the first laser torch and the second laser torch are located in the vertical symmetry plane of the measurement platform.
5. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system according to claim 1, wherein a signal processor (5), a signal amplifier (6) and a data processing unit are connected, all digital inclinometers (12) and all electromechanical dialmeters (20) are connected with the signal processor (5), the signal processor (5) is connected with the signal amplifier (6), and the signal amplifier (6) is connected with the data processing unit.
6. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system according to claim 1, wherein the connecting rod (21) is provided with a scale (32) for calibrating the pretension of the tension spring (28).
7. The bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time testing system according to claim 1, wherein the connecting rod (21) comprises a rod body and a cylinder, the lower end of the rod body is connected with the upper end of the cylinder, the rod body and the cylinder are coaxial, the diameter of the rod body is smaller than that of the cylinder, the cylinder is located in the inner cavity of the sleeve (13), the rod body penetrates through the upper bottom surface of the sleeve (13), and clearance fit is achieved between the cylinder and the sleeve (13).
8. The method for evaluating the three-dimensional deformation real-time testing of the bridge anti-overturning bearing capacity is characterized by adopting the system for evaluating the three-dimensional deformation real-time testing of the bridge anti-overturning bearing capacity according to any one of claims 1-7, and comprises the following steps:
-arranging a measuring device (4):
Arranging at least three measuring devices (4), and connecting a lifting rope (3) at the upper end of a connecting rod (21) of each electromechanical dial indicator measuring assembly of each measuring device (4);
A first electromechanical dial indicator measuring assembly and a second electromechanical dial indicator measuring assembly in each measuring device (4) are connected with a hanging rope (3) to be hung at a first hanging point of a main girder (1) of the bridge, and a third electromechanical dial indicator measuring assembly is connected with the hanging rope (3) to be hung at a second hanging point of the main girder (1) of the bridge; the lifting ropes (3) connected to the first electromechanical dial indicator measuring assembly, the second electromechanical dial indicator measuring assembly and the third electromechanical dial indicator measuring assembly are positioned in the same horizontal and vertical plane;
Of the three measuring devices (4), the hanging points of the lifting ropes (3) connected to the two measuring devices (4) are arranged along the longitudinal direction of the main beam (1), and the two measuring devices (4) are respectively positioned at two lateral sides of the main beam (1); the suspension points of the lifting ropes (3) connected to the other measuring device (4) are arranged along the transverse direction of the main beam (1), and the two suspension points of the measuring device (4) are overlapped with one suspension point of the first two measuring devices (4);
All the lifting ropes (3) are in a tensioning state before and after measurement;
Collecting and processing data:
Collecting measurement data of each digital display inclinometer (12) and the electromechanical dial indicator (20) in real time; and calculating the three-dimensional deformation of the main beam (1) by using the acquired measurement data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204275.3A CN113761640B (en) | 2021-10-15 | 2021-10-15 | Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204275.3A CN113761640B (en) | 2021-10-15 | 2021-10-15 | Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113761640A CN113761640A (en) | 2021-12-07 |
| CN113761640B true CN113761640B (en) | 2024-05-24 |
Family
ID=78799663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111204275.3A Active CN113761640B (en) | 2021-10-15 | 2021-10-15 | Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113761640B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060102581A (en) * | 2005-03-24 | 2006-09-28 | 한국유지관리 주식회사 | Bridge and ground test loading and measurement vehicle system |
| CN105334014A (en) * | 2015-11-10 | 2016-02-17 | 长安大学 | Adjustable suspended cable method for testing bridge deflection |
| CN208366268U (en) * | 2018-07-11 | 2019-01-11 | 长安大学 | A kind of middle-small span beam deflection dynamic measurement device |
| CN210322233U (en) * | 2019-08-16 | 2020-04-14 | 中都工程设计有限公司 | Bridge safety evaluation device |
| EP3805697A1 (en) * | 2019-09-20 | 2021-04-14 | Central Research Institute Of Building And Construction Co. Ltd. MCC Group | Plumb line based multi-point three-dimensional deformation test system and test data processing method thereof |
| CN215932634U (en) * | 2021-10-15 | 2022-03-01 | 长安大学 | Three-dimensional deformation real-time testing system for bridge anti-overturning bearing capacity evaluation |
-
2021
- 2021-10-15 CN CN202111204275.3A patent/CN113761640B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060102581A (en) * | 2005-03-24 | 2006-09-28 | 한국유지관리 주식회사 | Bridge and ground test loading and measurement vehicle system |
| CN105334014A (en) * | 2015-11-10 | 2016-02-17 | 长安大学 | Adjustable suspended cable method for testing bridge deflection |
| CN208366268U (en) * | 2018-07-11 | 2019-01-11 | 长安大学 | A kind of middle-small span beam deflection dynamic measurement device |
| CN210322233U (en) * | 2019-08-16 | 2020-04-14 | 中都工程设计有限公司 | Bridge safety evaluation device |
| EP3805697A1 (en) * | 2019-09-20 | 2021-04-14 | Central Research Institute Of Building And Construction Co. Ltd. MCC Group | Plumb line based multi-point three-dimensional deformation test system and test data processing method thereof |
| CN215932634U (en) * | 2021-10-15 | 2022-03-01 | 长安大学 | Three-dimensional deformation real-time testing system for bridge anti-overturning bearing capacity evaluation |
Non-Patent Citations (2)
| Title |
|---|
| 基于有限元的在役桥梁综合损伤评测法;王凌波;贺拴海;赵煜;蒋培文;;广西大学学报(自然科学版);20110220(第01期);全文 * |
| 新型非接触式桥梁挠度和变形的检测方法;项贻强;李春辉;白桦;;中国市政工程;20101025(第05期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113761640A (en) | 2021-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2482032A1 (en) | Universal precise leveling measuring device and measurement method thereof | |
| CN101788385A (en) | Stability parameter test board for automobile | |
| CN108827230B (en) | Ultra-wide water area precise river crossing leveling device and method | |
| CN215932634U (en) | Three-dimensional deformation real-time testing system for bridge anti-overturning bearing capacity evaluation | |
| CN113761640B (en) | Bridge anti-overturning bearing capacity evaluation three-dimensional deformation real-time test system and method | |
| CN102538726A (en) | System and method for testing position and posture of target by using electronic theodolite | |
| CN114964189A (en) | Mounting and measuring method for supporting jig frame and truss | |
| CN208059808U (en) | A kind of bridge machine arch measurer | |
| CN210533641U (en) | Bridge deflection measuring device | |
| CN213390268U (en) | Vertical resistance to compression static load testing arrangement of single pile | |
| CN111272137A (en) | Testing device for detecting shear deformation of bridge bearing and application | |
| CN212772499U (en) | Foundation ditch fender pile horizontal displacement's measuring device | |
| CN113503866A (en) | Geographic information engineering mapping device | |
| CN114485595A (en) | Method for accurately positioning strain measuring point of marked bridge static load test and marking device | |
| Wong-Chung et al. | Partially braced inelastic beam buckling experiments | |
| CN108645376B (en) | Telescopic leveling device and detection method thereof | |
| CN112095680A (en) | Vertical and horizontal combined load effect downhill pile model test device | |
| CN214033414U (en) | Main supporting leg structure for walking type self-balancing overpass bridge girder erection machine | |
| CN205157214U (en) | Steel spatial grid structure safety evaluation and test system | |
| CN221006294U (en) | Main cable torsion angle measuring device | |
| EP3889567A1 (en) | A method for measuring the utilization of the load carrying capacity of the building structural element | |
| CN203113205U (en) | Rigid pavement deflection testing device | |
| CN215003565U (en) | High-strength structure level bar | |
| CN217153604U (en) | Scale strutting arrangement | |
| CN113532227B (en) | Alignment matching height difference accurate measurement device and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |