Application of strain monitoring of box culvert structure in box culvert push construction

2021 ◽  
Author(s):  
Chengshuai Zhang ◽  
Qing Wu ◽  
Hao Wang ◽  
Hao Zhou ◽  
Shi Cao ◽  
...  
Keyword(s):  
Strain Monitoring ◽  
Box Culvert

Structural displacement and strain monitoring based on the edge detection operator

2016 ◽  
Vol 20 (2) ◽  
pp. 191-201 ◽  
Author(s):  
Wei Lu ◽  
Yan Cui ◽  
Jun Teng
Keyword(s):  
Edge Detection ◽  
Image Features ◽  
Image Feature ◽  
Monitoring Method ◽  
Strain Monitoring ◽  
Morphological Operator ◽  
Filtering Effect ◽  
Circular Target ◽  
Plane Displacement ◽  
The Cost

To decrease the cost of instrumentation for the strain and displacement monitoring method that uses sensors as well as considers the structural health monitoring challenges in sensor installation, it is necessary to develop a machine vision-based monitoring method. For this method, the most important step is the accurate extraction of the image feature. In this article, the edge detection operator based on multi-scale structure elements and the compound mathematical morphological operator is proposed to provide improved image feature extraction. The proposed method can not only achieve an improved filtering effect and anti-noise ability but can also detect the edge more accurately. Furthermore, the required image features (vertex of a square calibration board and centroid of a circular target) can be accurately extracted using the extracted image edge information. For validation, the monitoring tests for the structural local mean strain and in-plane displacement were designed accordingly. Through analysis of the error between the measured and calculated values of the structural strain and displacement, the feasibility and effectiveness of the proposed edge detection operator are verified.

Controllable configuration of conductive pathway by tailoring the fiber alignment for ultrasensitive strain monitoring

2021 ◽  
Vol 141 ◽  
pp. 106223
Author(s):  
Jinzheng Yang ◽  
Yanling Xu ◽  
Yangyang Song ◽  
Gongkai Wang ◽  
Fuxing Yin ◽  
...  
Keyword(s):  
Fiber Alignment ◽  
Strain Monitoring ◽  
Conductive Pathway

Strain/Stress Self-Sensing Precast-Box Culvert: Smart Element Design, and Experimental Verification

2021 ◽  
Author(s):  
Zenagebriel Gebremedhn ◽  
Guofu Qiao ◽  
Lu Sun ◽  
Hang Li ◽  
Shi Bai ◽  
...  
Keyword(s):  
Experimental Verification ◽  
Strain Stress ◽  
Box Culvert

Earth pressures exerted on an induced trench cast-in-place double-cell rectangular box culvert

2012 ◽  
Vol 49 (11) ◽  
pp. 1267-1284 ◽  
Author(s):  
Olajide Samuel Oshati ◽  
Arun J. Valsangkar ◽  
Allison B. Schriver
Keyword(s):  
Earth Pressure ◽  
Test Results ◽  
Overburden Pressure ◽  
Centrifuge Testing ◽  
Geotechnical Centrifuge ◽  
Drag Forces ◽  
Field Instrumentation ◽  
Earth Pressures ◽  
Box Culvert ◽  
Base Contact

Earth pressure data from the field instrumentation of a cast-in-place reinforced rectangular box culvert are presented in this paper. The instrumented culvert is a 2.60 m by 3.60 m double-cell reinforced cast-in-place rectangular box buried under 25.10 m of fill constructed using the induced trench installation (ITI) method. The average earth pressure measured across the roof was 0.42 times the overburden pressure, and an average of 0.52 times the overburden pressure was measured at mid-height of the culvert on the sidewalls. Base contact pressure under the rectangular box culvert was also measured, providing field-based data demonstrating increased base pressure resulting from downward drag forces developed along the sidewalls of the box culvert. An average increase of 25% from the measured vertical earth pressures on the roof plus the culvert dead load (DL) pressure was calculated at the culvert base. A model culvert was also tested in a geotechnical centrifuge to obtain data on earth pressures at the top, sides, and base of the culvert. The data from the centrifuge testing were compared with the prototype structure, and the centrifuge test results agreed closely with the measured field prototype pressures, in spite of the fact that full similitude was not attempted in centrifuge testing.

Passive wireless strain monitoring of a tire using capacitance and electromagnetic induction change

2005 ◽  
Vol 14 (2) ◽  
pp. 147-164 ◽  
Author(s):  
Ryosuke Matsuzaki ◽  
Akira Todoroki ◽  
Hideo Kobayashi ◽  
Yoshinobu Shimamura
Keyword(s):  
Electromagnetic Induction ◽  
Strain Monitoring

scholarly journals Strain Monitoring on Damaged Composite Laminates Using Digital Image Correlation

2015 ◽  
Vol 99 ◽  
pp. 353-360 ◽  
Author(s):  
Bataxi ◽  
Xi Chen ◽  
Zhefeng Yu ◽  
Hai Wang ◽  
Cees Bil
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Composite Laminates ◽  
Image Correlation ◽  
Strain Monitoring
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