High density distributed strain sensing of landslide in large scale physical model

2017 ◽  
Author(s):  
L. Schenato ◽  
M. Camporese ◽  
S. Bersan ◽  
S. Cola ◽  
A. Galtarossa ◽  
...  
Keyword(s):  
Physical Model ◽  
Large Scale ◽  
High Density ◽  
Strain Sensing ◽  
Distributed Strain

scholarly journals Graphene sensing meshes for densely distributed strain field monitoring

2019 ◽  
Vol 19 (5) ◽  
pp. 1323-1339
Author(s):  
Sumit Gupta ◽  
Gianmarco Vella ◽  
I-No Yu ◽  
Chin-Hsiung Loh ◽  
Wei-Hung Chiang ◽  
...  
Keyword(s):  
Thin Film ◽  
Damage Detection ◽  
Strain Field ◽  
Large Scale ◽  
Shaking Table Test ◽  
Field Monitoring ◽  
Shaking Table ◽  
Strain Sensing ◽  
Impedance Tomography ◽  
Distributed Strain

The objective of this study is to design and validate distributed strain field monitoring using a patterned nanocomposite “sensing mesh” that is coupled with an electrical impedance tomography (EIT) measurement strategy and algorithm. Although EIT has been used in other studies and in conjunction with a piezoresistive thin film for spatial damage detection, different strain components cannot be directly extracted from reconstructed EIT conductivity maps. Therefore, this study seeks to address this issue by patterning piezoresistive graphene-based thin films to form a mesh-like pattern. The high aspect ratio of each nanocomposite grid interconnect acts as a linear distributed strain sensor, capable of resolving strains along the entire length and direction of the element. This study first began with the design, fabrication, and characterization of the strain sensing response of a graphene-based thin film of high strain sensitivity. Second, the strain-sensitive film was spray-coated onto patterned polymer substrates to form the sensing meshes, which were then subjected to load tests. Upon validating distributed strain field monitoring through EIT, its applicability for field implementation and damage characterization was also demonstrated by instrumenting sensing meshes in the column of a seven-story reinforced-concrete building subjected to shaking table earthquake excitations. The large-scale shaking table test results successfully validated distributed damage detection.

CHARACTERIZING ANOMALIES IN DISTRIBUTED STRAIN MEASUREMENTS OF CAST-IN-SITU BORED PILES

2016 ◽  
Vol 78 (8-5) ◽  
Author(s):  
Hisham Mohamad ◽  
Bun Pin Tee ◽  
Koh An Ang ◽  
Mun Fai Chong
Keyword(s):  
Load Transfer ◽  
Load Test ◽  
Strain Sensing ◽  
Strain Profile ◽  
A New Technique ◽  
Optical Time ◽  
Distributed Optical Fiber ◽  
Non Destructive ◽  
Distributed Strain

This paper describes the method of identifying typical defects of bored cast-in-situ piles when instrumenting using Distributed Optical Fiber Strain Sensing (DOFSS). The DOFSS technology is based on Brillouin Optical Time Domain Analyses (BOTDA), which has the advantage of recording continuous strain profile as opposed to the conventional discrete based sensors such as Vibrating Wire strain gauges. In pile instrumentation particularly, obtaining distributed strain profile is important when analysing the load-transfer and shaft friction of a pile, as well as detecting any anomalies in the strain regime. Features such as defective pile shaft necking, discontinuity of concrete, intrusion of foreign matter and improper toe formation due to contamination of concrete at base with soil particles, among others, may cause the pile to fail. In this study, a new technique of detecting such defects is proposed using DOFSS technology which can potentially supplement the existing non-destructive test (NDT) methods. Discussion on the performance of instrumented piles by means of maintained load test are also presented

Large‐scale high‐density culture of hepatocytes in a liver microsystem with mimicked sinusoid blood flow

2018 ◽  
Vol 12 (12) ◽  
pp. 2266-2276
Author(s):  
Jing Liu ◽  
Chengpan Li ◽  
Shaohui Cheng ◽  
Shengnan Ya ◽  
Dayong Gao ◽  
...  
Keyword(s):  
Blood Flow ◽  
Large Scale ◽  
High Density ◽  
High Density Culture ◽  
Culture Of Hepatocytes

Distributed Strain Sensing in der Geotechnik - Teil 2

Bautechnik ◽  
2018 ◽  
Vol 95 (9) ◽  
pp. 653-657
Author(s):  
Arne Kindler ◽  
Stephan Großwig ◽  
Thomas Pfeiffer
Keyword(s):  
Strain Sensing ◽  
Distributed Strain
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