Method for testing rod body surface shear stress of total-length bonding reinforcing steel bar anchor rod

A testing method and a technology of shear stress, which are applied in the measurement, force measurement, and measurement device of the change force of the optical properties of the material when it is stressed, can solve the problem of easy falling off of the strain gauge, low spatial resolution, and inability to anchor the steel bar To solve problems such as the monitoring of rod working properties, achieve the effect of strong anti-electromagnetic field interference, simple testing process, and strong operability

Inactive Publication Date: 2018-03-30
QINGDAO TECHNOLOGICAL UNIVERSITY
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing bolt body stress test methods mainly include electrical measurement and optical fiber testing. The electrical measurement technology is to directly paste the resistance strain gauge on the surface of the bolt body. The strain gauge is easy to fall off, resulting in the loss of data during the test process. It is not reasonable enough to fully monitor the working properties of steel anchors; and optical fiber testing also includes distributed (Brillouin method, BOTDA) and quasi-distributed (Bragg grating method, Bragg Grating) two methods, distributed (Brillouin method, BOTDA) Brillouin method) uses one optical fiber for continuous testing, which is suitable for long-dista

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for testing rod body surface shear stress of total-length bonding reinforcing steel bar anchor rod
  • Method for testing rod body surface shear stress of total-length bonding reinforcing steel bar anchor rod
  • Method for testing rod body surface shear stress of total-length bonding reinforcing steel bar anchor rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] This embodiment adopts the surface shear stress testing device of the full-length bonded steel anchor rod to realize, and the specific process is as follows:

[0028](1), according to the shear stress test section of the anchor rod body 1, determine the position of the low temperature sensitive miniature fiber grating strain sensor 12, and engrave the low temperature sensitive miniature fiber grating strain sensor 12 into the optical fiber 14 to form a fiber grating sensor string. The sensor near the top of the rod hole is relatively dense), and the miniature clamping blocks at each low-temperature-sensitive miniature optical fiber grating strain sensor 12 two ends are welded on the anchor rod body 1 respectively, so that the low-temperature-sensitive miniature optical fiber grating strain sensor 12 and the anchor rod The rod body 1 is integrated to ensure that the two are deformed synchronously after being stressed, and the optical fiber 14 at the end of the anchor rod ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of shear stress testing, and relates to a method for testing rod body shear stress of a total-length bonding reinforcing steel bar anchor rod. When a grating sensor is subjected to a tensile force or pressure effect, the grating sensor extends or compresses, so that a grating period or fiber core refractive index changes, finally, wavelength drift of the fiber bragg grating sensor is caused, and thus shear stress of the rod body surface of the reinforcing steel bar anchor rod is obtained. The method for testing rod body surface shear stress of the total-length bonding reinforcing steel bar anchor rod is simple in test technology, convenient to operate, high in test precision and operability, and high in electromagnetic field interference resistance and rate of survival, and can realize automated monitoring.

Description

Technical field: [0001] The invention belongs to the technical field of shear stress testing, and relates to a method for testing the surface shear stress of a full-length bonded steel bar anchor body, which can more accurately and conveniently obtain the surface shear stress of a full-length bonded steel bar anchor body, which is used as a design parameter for the anchor bar. Reasonable selection and revision of relevant specifications provide basis. Background technique: [0002] At present, in the process of civil engineering construction, due to the limitation of geographical location, when excavating foundation pits in some places, the area of ​​foundation pits is too large, the excavation depth is too deep, the geological conditions are complex, and the working surface outside the foundation pits In narrow and small situations, in order to ensure that the foundation pit support in this situation can meet the strength and load requirements, in the foundation pit support...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01L1/24
CPCG01L1/246
Inventor 张明义白晓宇赵天杨匡政杨苏春王永洪牟洋洋苗德滋
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap