Test method for calibrating active constraining force and ultrasonic waves of FRP reinforced concrete column
A concrete column and ultrasonic technology, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, the use of stable tension/pressure to test the strength of materials, and the processing of building materials, etc., to achieve the effect of fast operation, reliable analysis and simple testing device.
Active Publication Date: 2020-04-10
WUHAN UNIV
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there is currently a lack of a test method that can calibrate the corresponding relationship between the active restraint force of FRP-strengthened concrete columns and the change of ultrasonic acoustic-stress sensitivity parameters.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The specific implementation manner of the present invention will be described below in conjunction with the technical scheme of the present invention and the accompanying drawings.
[0025] The invention provides a test method for calibrating the active restraint force and ultrasonic wave of a steel pipe concrete column. The calibration method includes the FRP reinforced concrete column to be tested 1, the self-locking prestressing device (including the anchor head 2 of the self-locking prestressing tensioning device, the nut 3 of the self-locking prestressing tensioning device, the self-locking prestressing tensioning Device screw 4), ultrasonic transmitting sensor 5, signal amplifying device, ultrasonic receiving device 6 and computer 7. Wherein, the FRP reinforced concrete column 1 to be tested is preferably formed by self-compacting concrete pouring, the ultrasonic transmitting sensor 5 is embedded in the center of the column cross-section before the core concrete i...
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
Login to View More Abstract
The invention discloses a test method for calibrating active constraining force and ultrasonic waves of an FRP reinforced concrete column. The method comprises: according to mechanical characteristicsof an FRP reinforced concrete column, using a self-locking type prestress tensioning device for controllably tensioning FRP, meanwhile, arranging a sound wave transmitting sensor in confined concrete, arranging a sound wave receiving device on the outer side of the confined concrete, and continuously receiving ultrasonic testing signals internally transmitted through core concrete in the tensioning process; according to the known tensile force and the sound-stress sensitivity parameters measured in the tensioning process, establishing a corresponding function relationship, so that the purposeof calibrating the change of the sound-stress sensitivity parameters is achieved. The method is simple in test device, rapid to operate and reliable in analysis, and after calibration is completed, the active constraining force provided by FRP for core concrete in the whole loading process of the FRP reinforced concrete can be measured through an ultrasonic method.
Description
technical field [0001] The invention relates to the technical field of ultrasonic non-destructive testing, in particular to a test method for calibrating the active restraining force of an FRP reinforced concrete column and ultrasonic waves. Background technique [0002] Fiber-reinforced composite (FRP) reinforced concrete column is a new type of composite column formed by wrapping FRP on the outside of ordinary concrete columns. Since the internal concrete is in a three-dimensional stress state under the constraint of external FRP, the FRP-reinforced concrete column It has high bearing capacity and good axial ductility. At the same time, the external FRP can protect the internal concrete so that the FRP-strengthened concrete column has good durability. Therefore, the FRP-strengthened concrete column has gradually been used in engineering repair and reinforcement. [0003] At present, there is no test device that can accurately measure the size of the restraint effect of the...
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
Login to View More IPC IPC(8): G01N29/04G01N3/08E04G23/02E04G21/12
CPCE04G21/12E04G23/0218E04G23/0225E04G2023/0251G01N3/08G01N29/04G01N2291/0232
Inventor 梁鸿骏卢亦焱李杉胡霁月蒋燕鞠黄悦赵鹏抟
Owner WUHAN UNIV