CN110940439B - Improved embedded concrete strain gauge - Google Patents
Improved embedded concrete strain gauge Download PDFInfo
- Publication number
- CN110940439B CN110940439B CN201911235766.7A CN201911235766A CN110940439B CN 110940439 B CN110940439 B CN 110940439B CN 201911235766 A CN201911235766 A CN 201911235766A CN 110940439 B CN110940439 B CN 110940439B
- Authority
- CN
- China
- Prior art keywords
- strain gauge
- concrete strain
- embedded concrete
- steel bar
- improved embedded
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses an improved embedded concrete strain gauge, which comprises: a strain gauge body and a mount member; the strain gauge body includes: the electronic component is sleeved on the protective sleeve, and the lead is arranged outside the protective sleeve and connected with the electronic component; protective case both ends all are provided with a mount pad part, and the mount pad part includes end seat and atress handle in proper order, the tip that atress handle and ribbed reinforcing bar contacted sets up the circular arc recess that suits with the reinforcing bar cylinder, sets up the recess that a plurality of is used for with the interlock of straight rib on circular arc recess surface. The invention provides an improved embedded concrete strain gauge, which not only considers the shape of a ribbed steel bar, the inclination angle of an inclined rib, the existence of a straight rib and the direction of the steel bar, but also considers the installation and fixation in the process of installing the concrete strain gauge, greatly reduces the error caused by the installation problem, and simultaneously reduces the installation difficulty in construction monitoring.
Description
Technical Field
The invention relates to a bridge structure stress monitoring technology, in particular to an improved embedded concrete strain gauge.
Background
Along with the rapid development of infrastructure construction, bridges are rapidly developed as important components in the infrastructure, and in the construction of bridges, bridge grand bridges are more and more, so that the construction monitoring plays a crucial role in order to ensure the construction safety and smooth closure of the bridge grand bridges and meet the design line shape; in construction monitoring, stress monitoring is an important part, and the accuracy of the stress monitoring is in great relation with monitored instruments.
At present, the traditional concrete strain gauge adopted in construction monitoring has more problems with the actual situation on site. The traditional concrete strain gauge considers the steel bars of a measured structure body as plain round steel bars, and stressed longitudinal bars in actual construction monitoring are ribbed steel bars, so that the ribbed steel bars are only in point-to-point contact with the traditional concrete strain gauge, the ribbed steel bars cannot be well bonded with the concrete strain gauge, actual deformation is transmitted, and meanwhile, the thickness of a stressed handle of the concrete strain gauge is larger aiming at the distance between the inclined ribs of the ribbed steel bars and the horizontal direction, so that the stressed handle acts on the inclined ribs of the ribbed steel bars instead of between ideal inclined ribs; considering the actual operation environment of construction monitoring, the concrete strain gauge is not ideally fixed under the stressed longitudinal bar in installation, the binding wire direction is not ideally perpendicular to the concrete strain gauge, and meanwhile, the binding wire is easy to slide, so that part of the binding wire jumps out of the end seat and is bound on the sleeve, and the reading error of the concrete strain gauge is caused; simultaneously, because the actual operating environment of construction control is narrow and small, lead to one person to install the concrete strain gauge comparatively difficultly to and the concrete strain gauge after only fixing one end socket, cause easily that other end socket effect position is not under the atress longitudinal bar, cause behind the measuring deformation not ideal deformation, appear unreasonable error.
Disclosure of Invention
The invention aims to solve the technical problem of providing an improved embedded concrete strain gauge aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an improved embedded concrete strain gauge comprising: a strain gauge body and a mount member;
the strain gauge body includes: the electronic component is sleeved on the protective sleeve, and the lead is arranged outside the protective sleeve and connected with the electronic component; the two ends of the protective sleeve are respectively provided with a mounting seat part which sequentially comprises an end seat and a stress handle,
the end part of the stress handle, which is contacted with the ribbed steel bar, is provided with an arc-shaped groove matched with the steel bar column, and the surface of the arc-shaped groove is provided with a plurality of grooves used for being meshed with the straight ribs.
According to the scheme, the grooves formed in the surfaces of the circular arc-shaped grooves are slightly larger than the straight ribs in size.
According to the scheme, the grooves formed in the surfaces of the circular arc-shaped grooves are magnetic material grooves.
According to the scheme, the inclination angle of the stress handle is the same as that of the ribbed steel bar.
According to the scheme, the middle part of the end seat is provided with a groove for binding and fixing the binding wire.
According to the scheme, the inner side of the end seat is provided with an inner side plate for binding and binding wires for limiting.
According to the scheme, the end seat covers the opening of the end part of the protective sleeve, and the seat bodies at the two ends of the protective sleeve are respectively connected with the two ends of the vibrating wire in the protective sleeve and strain the vibrating wire.
According to the scheme, the electronic component is an electromagnetic coil.
According to the scheme, the vibrating wire is arranged in the inner cavity of the protective sleeve along the central shaft of the protective sleeve.
The invention has the following beneficial effects:
on the basis of the traditional concrete strain gauge, the conditions such as construction monitoring actual operation environment and the like are considered, the improved embedded concrete strain gauge is provided, the stress handle and the end seat are mainly improved, the inclination angle of stress is set to be the inclination angle (60 degrees) of the ribbed steel bar inclined rib, the action space of the stress handle is maximized, and the stress handle is ensured to act between the inclined ribs; according to the shape of the ribbed steel bar and the existence of the straight rib, the stress handle of the traditional round package body is improved into a circular arc-shaped groove with a certain depth, and three grooves with the size slightly larger than the size of the straight rib are arranged below the circular arc-shaped groove; the groove of the stressed handle is made of a material with a certain thickness and magnetic property, so that the stressed handle plays a role in temporary fixation; a groove is arranged at an ideal position of the end seat to prompt the binding position of the binding wire and fix the binding wire; the inner side plate is arranged at the position where the end seat is crossed with the sleeve to prevent the binding wires from sliding and acting on the sleeve.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the installation of a ribbed bar and a modified embedded concrete strain gauge according to an embodiment of the present invention;
FIG. 3 is a schematic view of a strain gage stress stem of an embodiment of the present invention;
fig. 4 is a schematic view of the combination of the ribbed steel bar and the force-bearing handle in different directions according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, an improved embedded concrete strain gauge mainly comprises: stress handle 1, end seat 2, end seat inner side plate 3, sleeve 4, electronic component 5, wire 6 etc..
An improved embedded concrete strain gauge comprising: a strain gauge body and a mount member;
the strain gauge body includes: the electronic component comprises a protective sleeve 4, a lead 6 and an electronic component 5, wherein the electronic component is sleeved on the protective sleeve, and the lead is arranged outside the protective sleeve and connected with the electronic component; the two ends of the protective sleeve are respectively provided with a mounting seat part, and the mounting seat parts sequentially comprise an end seat 2 and a stress handle 1;
the end part of the stress handle, which is contacted with the ribbed steel bar, is provided with an arc-shaped groove matched with the steel bar column, the surface of the arc-shaped groove is provided with a plurality of grooves used for being mutually meshed with the straight ribs, and as shown in figures 3 and 4, the grooves arranged on the surface of the arc-shaped groove are slightly larger than the straight ribs in size. The groove arranged on the surface of the circular arc-shaped groove is a magnetic material groove, and the inclination angle of the stress handle is the same as that of the ribbed steel bar inclined rib and is 60 degrees.
The improvement of the invention is as follows:
aspect 1: the inclination angle of the stress handle is the same as that of the ribbed steel bar.
Firstly, the inclination angle of the stress handle 1 is adjusted to be the same as the inclination angle (60 degrees) of the inclined ribs of the ribbed steel bar, so that the problem that the stress handle 1 of the traditional concrete strain gauge is always acted on the inclined ribs instead of the spaces among the inclined ribs on the ribbed steel bar is solved, and meanwhile, the stress handle of the traditional concrete strain gauge is easily slid on the inclined ribs; the inclination angle of the stress handle 1 is adjusted to be the same as the inclination angle of the inclined rib of the ribbed steel bar, so that the action space of stress can be maximized, the stress handle 1 is ensured to act on the inclined rib of the ribbed steel bar during installation, and the inclined ribs on two sides play a role of blocking for preventing the stress handle from sliding.
Aspect 2: the stress handle considers the round and straight ribs of the steel bar and is provided with an arc-shaped groove, and three grooves with the size slightly larger than the size of the straight ribs are arranged below the arc-shaped groove.
Firstly, considering that the shape of the ribbed steel bar is circular and the existence of straight ribs; the traditional concrete strain gauge is in point-to-point contact with the ribbed steel bar, and the contact form is easy to cause the dislocation of the traditional concrete strain gauge and the ribbed steel bar, so that the error of measurement data is caused; therefore, considering the shape of the ribbed steel bar and the existence of the straight rib, a certain arc contact surface is arranged on the stress handle 1, so that the reliable combination of the concrete strain gauge and the ribbed steel bar is ensured, and the situation of sliding is not easy to occur. Three grooves considering straight ribs are formed, so that the problem that the directions of ribbed steel bars are different is solved, and the concrete strain gauge is convenient to install.
Aspect 3: the stress handle groove is made of a magnetic material with a certain thickness.
As shown in fig. 3, a groove of a stress handle 1 of the concrete strain gauge is made of a material with a certain thickness and magnetic property, so that the concrete strain gauge can be temporarily fixed and can even be a permanently fixed device; temporary fixation of the traditional concrete strain gauge in the binding process is difficult, and when the end seat 2 at one end is fixed, the end seat 2 at the other end is easy to deviate from an ideal fixed position; the stress handle 1 is provided with the groove and made of a material with magnetic property, so that the concrete strain gauge can be conveniently fixed at an ideal position and can be conveniently installed by a single person in a narrow space in construction monitoring, and the problem that the traditional concrete strain gauge is temporarily fixed is solved.
Aspect 4: the end seat is provided with a groove with certain width and depth.
The end seat 2 of the concrete strain gauge is provided with a groove with a certain width and depth at a proper position, so that the concrete strain gauge can be conveniently bound, an ideal position is provided, the end seat of the traditional concrete strain gauge is not smooth, an operator does not know the binding position of a binding wire, and the binding wire is easy to slide; when the ideal binding position of the end seat 2 is provided with a groove with certain width and depth, the binding position of the binding wire of an operator can be better reminded and the sliding condition is not easy to occur.
Aspect 5: the end seat is provided with an inner side plate.
The inner side plate 3 with a certain size is arranged at the position where the end seat 2 of the concrete strain gauge is intersected with the sleeve 4 (the size of the inner side plate is larger than that of the end seat of the concrete strain gauge), so that the phenomenon that the binding wire slides to act on the sleeve 4 to cause larger errors is prevented.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. An improved embedded concrete strain gauge, comprising: a strain gauge body and a mount member;
the strain gauge body includes: the electronic component is sleeved on the protective sleeve, and the lead is arranged outside the protective sleeve and connected with the electronic component; the protective sleeve is characterized in that two ends of the protective sleeve are respectively provided with a mounting seat part, the mounting seat parts sequentially comprise an end seat and a stress handle, the end part of the stress handle, which is in contact with the ribbed steel bar, is provided with an arc-shaped groove matched with the steel bar cylinder, and the surface of the arc-shaped groove is provided with a plurality of grooves used for being meshed with the straight ribs; the grooves arranged on the surfaces of the circular arc-shaped grooves are grooves with the size slightly larger than that of the straight ribs; the inclination angle of the stress handle is the same as that of the ribbed steel bar.
2. The improved embedded concrete strain gauge according to claim 1, wherein the grooves arranged on the surface of the circular arc-shaped groove are magnetic material grooves.
3. The improved embedded concrete strain gauge according to claim 1, characterized in that the middle of the end seat is provided with a groove for binding and fixing a binding wire.
4. The improved embedded concrete strain gauge according to claim 1, characterized in that the inner side of the end seat is provided with an inner side plate for limiting the binding wire.
5. The improved embedded concrete strain gauge according to claim 1, wherein the end seats are arranged to cover the openings at the ends of the protective casing, and the seat bodies at the two ends of the protective casing are respectively connected with the two ends of the vibrating wire in the protective casing and tension the vibrating wire.
6. The improved embedded concrete strain gauge of claim 1, wherein said electronic component is an electromagnetic coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235766.7A CN110940439B (en) | 2019-12-05 | 2019-12-05 | Improved embedded concrete strain gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911235766.7A CN110940439B (en) | 2019-12-05 | 2019-12-05 | Improved embedded concrete strain gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110940439A CN110940439A (en) | 2020-03-31 |
| CN110940439B true CN110940439B (en) | 2021-07-06 |
Family
ID=69909644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911235766.7A Active CN110940439B (en) | 2019-12-05 | 2019-12-05 | Improved embedded concrete strain gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110940439B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858472A (en) * | 1987-08-25 | 1989-08-22 | Herget Gerhard H | Strain monitoring system |
| CN2269431Y (en) * | 1996-04-29 | 1997-12-03 | 林夏森 | Hooping ring frame for beam and column |
| CN1368585A (en) * | 2001-02-03 | 2002-09-11 | 朱其聪 | Construction method of cast-in-situ prestressed concrete hollow floor slab |
| CN2885974Y (en) * | 2006-04-07 | 2007-04-04 | 张金明 | Two-purpose steel bar fixing support |
| CN109029338A (en) * | 2018-08-03 | 2018-12-18 | 长江勘测规划设计研究有限责任公司 | A kind of embedded type concrete strain gauge means and its construction method |
-
2019
- 2019-12-05 CN CN201911235766.7A patent/CN110940439B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4858472A (en) * | 1987-08-25 | 1989-08-22 | Herget Gerhard H | Strain monitoring system |
| CN2269431Y (en) * | 1996-04-29 | 1997-12-03 | 林夏森 | Hooping ring frame for beam and column |
| CN1368585A (en) * | 2001-02-03 | 2002-09-11 | 朱其聪 | Construction method of cast-in-situ prestressed concrete hollow floor slab |
| CN2885974Y (en) * | 2006-04-07 | 2007-04-04 | 张金明 | Two-purpose steel bar fixing support |
| CN109029338A (en) * | 2018-08-03 | 2018-12-18 | 长江勘测规划设计研究有限责任公司 | A kind of embedded type concrete strain gauge means and its construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110940439A (en) | 2020-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8015871B2 (en) | Sender unit for sensing the level of remaining fuel in a fuel tank utilizing a non-contacting sensor | |
| US20060204199A1 (en) | Fixer for fiber bragg grating sensor | |
| CN110940439B (en) | Improved embedded concrete strain gauge | |
| US20090185773A1 (en) | Apparatus and Method for Measuring Convergence Using Fiber Bragg Grating Sensor | |
| CN105674942A (en) | Concrete strainmeter subassembly and installation method | |
| ITBO980538A1 (en) | HEAD FOR THE CONTROL OF LINEAR DIMENSIONS OF MECHANICAL PIECES. | |
| CN209116930U (en) | Slip shaft yoke phase special gauge | |
| CN116026281B (en) | Concrete strain gauge mounting device with protection function and construction method thereof | |
| CN110725699A (en) | Shear force measuring method for circular-end-shaped tenon and mortise of shield tunnel segment | |
| US4543725A (en) | Ring gauge for checking external dimensions | |
| JP6660151B2 (en) | Measuring device for measuring the interval between screw rebars in a coupler and measuring method using the same | |
| JP5757014B2 (en) | Displacement meter for concrete structures | |
| CN108692669A (en) | A kind of fiber-optic grating sensor for railroad track meter shaft | |
| CN205317195U (en) | Concrete strainometer subassembly | |
| KR20120048313A (en) | Apparatus for measurement based on fbg sensor and bridge bearing thereof | |
| JP2008093991A (en) | Rfid tag fitting fixture/method | |
| KR200342888Y1 (en) | Simplified device for measuring concrete crack | |
| CN202692899U (en) | Special measuring tool for diameter of external-spline clamping spring groove | |
| JP2008267960A (en) | Ruler for confirming rail-grinding position | |
| KR101159279B1 (en) | An Indicator of Schmidt rebound test hammer | |
| CN109682291A (en) | Digital display gauging rule | |
| KR100724752B1 (en) | Local Pressure Measurement Structure of Model and Apparatus for Pressure Measurement of Real Structure | |
| JP2000073574A (en) | Building foundation inspecting jig | |
| KR200464706Y1 (en) | Reinforced jig for specimen for tensile test | |
| US6490804B1 (en) | Comparison gauge for automotive starters |
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 |