CN115032059A - Triangular steel structure compression resistance testing method based on strain monitoring - Google Patents
Triangular steel structure compression resistance testing method based on strain monitoring Download PDFInfo
- Publication number
- CN115032059A CN115032059A CN202210437070.8A CN202210437070A CN115032059A CN 115032059 A CN115032059 A CN 115032059A CN 202210437070 A CN202210437070 A CN 202210437070A CN 115032059 A CN115032059 A CN 115032059A
- Authority
- CN
- China
- Prior art keywords
- strain
- sensor
- steel structure
- monitoring
- data
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 65
- 239000010959 steel Substances 0.000 title claims abstract description 65
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 230000006835 compression Effects 0.000 title claims abstract description 12
- 238000007906 compression Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000007405 data analysis Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000011076 safety test Methods 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 239000000835 fiber Substances 0.000 abstract 2
- 238000002474 experimental method Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides a method for testing the compression resistance of a triangular steel structure based on strain monitoring. The system comprises a sensor system, a data acquisition and processing subsystem, a data transmission subsystem and an information analysis and monitoring early warning subsystem. Sensor system adopts optic fibre strain sensor, utilizes its small, and light in weight, advantages such as anti-electromagnetic interference install the measuring point that can reflect the strain condition in the steel construction, judge through optic fibre strain sensor measuring data whether the steel construction is in normal strain state, carry out the experiment to an actual steel structure model, and the result shows: the method can accurately identify and monitor the strain condition of the common steel structure, so as to judge the pressure resistance of the steel structure.
Description
Technical Field
The invention relates to the technical field of structure monitoring, in particular to an arrangement mode of vibration monitoring sensors of a large-span steel structure.
Background
The steel structure assembly type building is a novel standardized and modular building system which is mainly characterized by taking a steel structure as a structural system and taking industrial production, assembly type construction, integrated decoration and informatization management of parts as main characteristics, has the advantages of high speed, high efficiency, less field operation, good earthquake resistance and the like, and is easy to realize the modernization and industrialization of the building industry. The vigorous development and popularization of steel structure assembly type buildings are promoted to be the national policy and become the main direction of the development of the building industry in China at present
In recent years, accidents such as collapse, fire and the like of a plurality of steel structure buildings occur in succession internationally and domestically, so that the development and application of the safety monitoring technology of the steel structure fabricated building are very important in the process of vigorously developing and popularizing the steel structure fabricated building. Although relevant national and industrial standards exist in the design, processing, installation and other processes of the steel structure assembly type building, at present, no safety monitoring technical system and standard of the building are formed from the systematic point of view, and related technical research and development and engineering application are few, even in a blank state. Therefore, the system researches and develops and applies and popularizes the related safety monitoring technology, which not only has great significance for building safety, but also is more beneficial to the application and popularization of various steel structure assembly type buildings.
Disclosure of Invention
The invention provides a method for testing the compression resistance of a triangular steel structure based on strain monitoring, which is used for judging whether the steel structure is in a normal strain state or not through data measured by an optical fiber strain sensor.
In order to achieve the purpose, the triangular steel structure compression resistance testing method based on strain monitoring comprises a sensor system, a data acquisition and processing subsystem, a data transmission subsystem and an information analysis and monitoring early warning subsystem which are sequentially connected;
the sensor system comprises an optical fiber strain sensor;
the data acquisition and processing subsystem transmits the monitored data to a computer in real time through the data transmission subsystem, and the data is analyzed and processed by a network analyzer;
the monitoring and early warning subsystem is composed of a data processing server, a data storage center, a monitoring center terminal and an early warning center.
A triangular steel structure compression resistance testing method based on strain monitoring comprises the following steps:
and selecting a sensor mounting point capable of reflecting the strain condition of the triangular steel structure, and respectively mounting sensors on the n triangular units. The method for calculating the mounting point of the optical fiber strain sensor comprises the following steps:
in order to ensure the symmetry of the structure, the left side and the right side of the structure are alternately arranged. The length of a measuring point of a sensor arranged on the mth triangular unit from the vertex is x m (mm), the calculation formula is as follows:
wherein the inner diameter D of the steel pipe 1 (mm), nominal diameter D of the steel pipe g (mm), the wall thickness t (mm), the length l (mm) of a single bevel edge of the steel pipe, the distance d (mm) between the two steel pipes, the total unit number n of the steel pipes, the included angle theta of the top, and the distance x (mm) between a measuring point of the sensor and the vertex;
further, according to the calculation result, the optical fiber strain sensor is arranged at the corresponding position of the triangular steel structure;
furthermore, each sensor is connected to an optical fiber cable to form a distributed sensor network for monitoring the field, and each sensor is called as a channel;
furthermore, all channels are collected to a data transceiver of a monitoring site and are transmitted to a remote control room by using a main optical cable, the same data transceiver is used in the control room to receive signals from a field sensor, and the data transceiver outputs a plurality of channels corresponding to the field sensor to a network analyzer;
further, pressure is applied on top of the steel structure. The stress application method comprises the following steps: applying positive pressure with the same magnitude on the top points of all the steel structure units so as to obtain (1.08) m X 200) N, the hold time per applied force was 60 s. After the force is applied each time, the time for restoring and adjusting the structure is 20s, 50N is added each time until the structure is abnormally strained, and the alarm system gives an alarm;
further, according to the comparison of the strain data detected by the optical fiber strain sensor and the calculation result of a formula, whether the steel structure is in a normal strain state or not is judged, and the formula is as follows:
in the formula, the outer diameter D of the steel pipe 2 (mm), inner diameter D of Steel pipe 1 (mm), the wall thickness t (mm), the length l (mm) of the steel pipe, the distance d (mm) between the two steel pipes, the number n of the steel pipes, the included angle of the top part of the steel pipes is theta, and the distance x between the measuring point of the sensor and the vertex is arranged on the mth unit m (mm)；
If all the sensors detect the data epsilon<ε max All the conditions are satisfied, the steel structure is in a normal strain state, and if any sensor detects data epsilon>ε max The steel structure is in an abnormal strain state;
and further, the detection result is returned to the data analysis and monitoring early warning subsystem, and an alarm signal is sent out when any sensor detects an abnormal state.
Drawings
FIG. 1 is a diagram of sensor mounting point profiles in the construction of the present invention;
FIG. 2 is a flow chart of a monitoring method of the present invention;
the foregoing is merely illustrative of the structure of the present invention and various modifications or additions may be made to the specific structure described by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the appended claims.
Claims (6)
1. A triangular steel structure compression resistance testing method based on strain monitoring is characterized by comprising the following steps: the system comprises a sensor system, a data acquisition and processing subsystem, a data transmission subsystem and an information analysis and monitoring early warning subsystem; the sensor system is composed of a plurality of optical fiber strain sensors; the data acquisition and processing subsystem is connected with the sensor system, acquires data measured by the sensor system and stores the data in a corresponding device; the data acquisition and processing subsystem is connected with the data transmission subsystem, transmits the acquired data to the information analysis and monitoring early warning subsystem through the data transmission system for analysis, obtains a safety test report, displays the safety test report on the platform, and sends out an early warning signal when an abnormal strain state is monitored.
2. The method for testing the compression resistance of the triangular steel structure based on the strain monitoring as claimed in claim 1, wherein the triangular steel structure is formed by connecting a plurality of units, each unit is a triangular steel pipe (without a bottom side) with two equal sides, and the units are connected with each other at the bottom to form a whole by two steel pipes.
3. The method for testing the compression resistance of the triangular steel structure based on the strain monitoring as claimed in claim 1, wherein the strain sensor is an optical fiber strain sensor.
4. The method for testing the compression resistance of the triangular steel structure based on the strain monitoring as claimed in claim 1, characterized by comprising the following steps:
step 1: and installing optical fiber strain sensors, and installing the sensors on the n triangular units respectively, wherein the sensors are alternately installed on the left side and the right side of the structure in order to ensure the symmetry of the structure. Mounting a sensor on the mth triangular unit to measure the point distanceLength from vertex x m (mm), the calculation formula is as follows:
wherein the inner diameter D of the steel pipe 1 (mm), nominal diameter D of the steel pipe g (mm), the wall thickness t (mm), the length l (mm) of a single bevel edge of a steel pipe, the distance d (mm) between two steel pipes, the total unit number n of the steel pipes, the included angle of the top part theta, and the distance x (mm) between a measuring point of a sensor and a vertex;
step 2: according to the calculation result, the optical fiber strain sensor is installed at the corresponding position of the steel structure;
and step 3: connecting each sensor to an optical fiber cable to form a distributed sensor network for monitoring a field, wherein each sensor is called as a channel;
and 4, step 4: collecting all channels to a data transceiver of a monitoring site, transmitting the channels to a remote control room by using a main optical cable, receiving signals from a site sensor by using the same data transceiver in the control room, and outputting a plurality of channels corresponding to the site sensor to a network analyzer by using the data transceiver;
and 5: pressure is applied on top of the steel structure. The stress application method comprises the following steps: applying positive pressure with the same magnitude on the top points of all the steel structure units, and then (1.08) m X 200) N, the hold time per applied force was 60 s. After each force application, the structure recovery adjustment time is 20s, each time 50N is added, and an alarm system gives an alarm until abnormal strain occurs in the structure.
5. The method for testing the compression resistance of the triangular steel structure based on the strain monitoring as claimed in claim 1, wherein the strain data detected by the optical fiber strain sensor can be compared with the calculation result of a formula to judge whether the steel structure is in a normal strain state, wherein the formula is as follows:
in the formula, the outer diameter D of the steel pipe 2 (mm), inner diameter D of Steel pipe 1 (mm), the wall thickness t (mm), the length l (mm) of the steel pipe, the distance d (mm) between the two steel pipes, the number n of the steel pipes, the included angle of the top part of the steel pipes is theta, and the distance x between the measuring point of the sensor and the vertex is arranged on the mth unit m (mm) 。
6. The method for testing the compression resistance of the triangular steel structure based on strain monitoring as claimed in claim 5, wherein when all the sensors detect the data epsilon<ε max When all the strain states are established, the steel structure is in a normal strain state, and epsilon detected by any one sensor is present>ε max When the steel structure is in an abnormal strain state. The detection result can be returned to the data analysis and monitoring early warning subsystem, and an alarm signal is sent out when any sensor detects an abnormal state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437070.8A CN115032059A (en) | 2022-04-20 | 2022-04-20 | Triangular steel structure compression resistance testing method based on strain monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437070.8A CN115032059A (en) | 2022-04-20 | 2022-04-20 | Triangular steel structure compression resistance testing method based on strain monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115032059A true CN115032059A (en) | 2022-09-09 |
Family
ID=83118499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210437070.8A Pending CN115032059A (en) | 2022-04-20 | 2022-04-20 | Triangular steel structure compression resistance testing method based on strain monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115032059A (en) |
-
2022
- 2022-04-20 CN CN202210437070.8A patent/CN115032059A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108922123B (en) | mine slope slip stability monitoring and early warning method | |
| US8410952B2 (en) | Methods for forewarning of critical condition changes in monitoring civil structures | |
| JP2012168152A (en) | Analytic method for structure safety | |
| CN109781368B (en) | Large-span steel structure support unloading monitoring method | |
| WO2020116032A1 (en) | Road monitoring system, road monitoring device, road monitoring method, and non-transitory computer-readable medium | |
| US11940339B2 (en) | Embedded structural health monitoring systems for building structures created by additive processes | |
| CN103606240B (en) | Adopt the method that distributed optical fiber temperature transducer system carries out fire alarm | |
| CN115994320A (en) | Intelligent friction pendulum vibration isolation support and state monitoring and fault diagnosis system | |
| CN113532302A (en) | Pipeline strain monitoring and early warning system and method | |
| CN109254077A (en) | Degradation detection method of structural member | |
| Li et al. | Damage detection of flange bolts in wind turbine towers using dynamic strain responses | |
| CN115032059A (en) | Triangular steel structure compression resistance testing method based on strain monitoring | |
| JP3777453B2 (en) | Structure monitoring system | |
| CN115752375A (en) | Assembly type steel column perpendicularity deviation detection device and detection method based on optical fibers | |
| CN108007935B (en) | On-line monitoring system for buried cracks based on distributed optical fiber sensing technology structure | |
| Wong et al. | Modular Architecture of SHM System for Cable‐Supported Bridges | |
| CN114941995B (en) | Beam bridge steel structure deformation monitoring system based on distributed optical fiber strain test | |
| CN114414180B (en) | Safety monitoring system of temporary structure for bridge construction | |
| CN112461146B (en) | Insulator deformation measuring method, device and system | |
| CN114964456B (en) | Beam bridge steel structure vibration safety monitoring system utilizing vehicle speed monitoring | |
| CN104743445B (en) | Safety of tower crane device for detecting performance based on communicating pipe and attitude and the method for analysis thereof | |
| CN114894290A (en) | Vibration monitoring sensor arrangement mode of large-span steel structure | |
| CN112484665B (en) | Insulator deflection angle measuring method, device and system | |
| CN113624273A (en) | Ship lock miter gate online monitoring system and method | |
| CN114894617A (en) | Device and method for testing compressive capacity of arc-shaped steel structure |
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 |