TY - JOUR
T1 - Integrating Finite Element Modeling with Sensing System for Monitoring Composite Structures Using the Method of Neutral Axis
AU - Li, Xi
AU - Glisic, Branko
N1 - Funding Information:
The research presented in this paper was supported by the US Department of Transportation USDOT-RITA UTC Program [grant number DTRT12-G-UTC16], enabled by the Center for Advanced Infrastructure and Transportation (CAIT) at Rutgers University and the National Science Foundation [grant number CMMI-1362723]. The findings, statements, conclusions, and recommendations presented or implied in this paper shall be considered the opinions of the authors only. They do not reflect the views of the USDOT-RITA UTC Program, the Center for Advanced Infrastructure and Transportation at Rutgers University, or the National Science Foundation. The authors would like to acknowledge Dr. Dorotea Sigurdardottir for her help and previous work on the neutral axis method for damage detection. Special thanks to Professor Nenad Gucunski and his research group at Rutgers University for their collaboration and support on the testing of the ANDERS slab.
Funding Information:
The research presented in this paper was supported by the US Department of Transportation USDOT-RITA UTC Program [grant number DTRT12-G-UTC16], enabled by the Center for Advanced Infrastructure and Transportation (CAIT) at Rutgers University and the National
Publisher Copyright:
© 2018, © 2018 International Association for Bridge and Structural Engineering (IABSE).
PY - 2019/1/2
Y1 - 2019/1/2
N2 - Structural Health Monitoring (SHM) is an engineering process that enables assessment of the condition and performance of structures. The method of the neutral axis has great potential as a feasible data analysis component of SHM for beam-like structures. However, the change in position of the neutral axis in composite steel-concrete multi-girder structures due to various damage types has not been fully understood. In this research, the method of the neutral axis was explored for a composite large-scale-model structure with artificially created damage in the concrete slab. Based on previous research, a downward movement of the neutral axis was expected at locations of damage. However, the unexpected upward shift of the neutral axis was observed from monitoring activities. The goal of this paper is twofold: first, to understand the conditions under which the neutral axis moves up in damaged cross-sections of composite beams; and second, to explore methods for damage detection and characterization in composite beam structures, informed by numerical modeling and based on a change in position of the neutral axis. A comparison between finite element model (FEM) results and measurements taken by strain-based monitoring system enabled important insights on behaviors of composite cross-sections under typical damage scenarios.
AB - Structural Health Monitoring (SHM) is an engineering process that enables assessment of the condition and performance of structures. The method of the neutral axis has great potential as a feasible data analysis component of SHM for beam-like structures. However, the change in position of the neutral axis in composite steel-concrete multi-girder structures due to various damage types has not been fully understood. In this research, the method of the neutral axis was explored for a composite large-scale-model structure with artificially created damage in the concrete slab. Based on previous research, a downward movement of the neutral axis was expected at locations of damage. However, the unexpected upward shift of the neutral axis was observed from monitoring activities. The goal of this paper is twofold: first, to understand the conditions under which the neutral axis moves up in damaged cross-sections of composite beams; and second, to explore methods for damage detection and characterization in composite beam structures, informed by numerical modeling and based on a change in position of the neutral axis. A comparison between finite element model (FEM) results and measurements taken by strain-based monitoring system enabled important insights on behaviors of composite cross-sections under typical damage scenarios.
KW - composite steel-concrete structure
KW - damage detection using neutral axis
KW - fiber optic sensors
KW - finite element modeling
KW - strain-based structural health monitoring
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U2 - 10.1080/10168664.2018.1509681
DO - 10.1080/10168664.2018.1509681
M3 - Article
AN - SCOPUS:85064936040
SN - 1016-8664
VL - 29
SP - 8
EP - 17
JO - Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE)
JF - Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE)
IS - 1
ER -