TY - GEN
T1 - Evaluating the state of a section under bending using the location of neutral axis
AU - Li, Xi
AU - Glisic, Branko
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/8/3
Y1 - 2015/8/3
N2 - Neutral axis of a composite section under loading is a line in the cross-section along which the section experiences zero strain. When a structure is under no axial load, the location of the neutral axis passes through the centroid of stiffness of the cross-section, which can be calculated based on geometric and stiffness properties of the cross-section. When the structure experiences damage, the location of the centroid of stiffness as well as the neutral axis shift in position, a phenomenon that can be used as an indication of damage. According to literature, damage in a cross-section of the concrete deck of a composite concrete-steel structure causes the neutral axis to move down. This paper attempts to explain an observation from field data that the neutral axis could move up in the presence of damage in the concrete deck of a composite structure. Preliminary results show that the use finite element model has potential to produce results that help explain the observation.
AB - Neutral axis of a composite section under loading is a line in the cross-section along which the section experiences zero strain. When a structure is under no axial load, the location of the neutral axis passes through the centroid of stiffness of the cross-section, which can be calculated based on geometric and stiffness properties of the cross-section. When the structure experiences damage, the location of the centroid of stiffness as well as the neutral axis shift in position, a phenomenon that can be used as an indication of damage. According to literature, damage in a cross-section of the concrete deck of a composite concrete-steel structure causes the neutral axis to move down. This paper attempts to explain an observation from field data that the neutral axis could move up in the presence of damage in the concrete deck of a composite structure. Preliminary results show that the use finite element model has potential to produce results that help explain the observation.
KW - composite bridge structure
KW - damage detection
KW - long-gauge fiber optic sensor
KW - neutral axis
KW - structural health monitoring
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U2 - 10.1109/EESMS.2015.7175844
DO - 10.1109/EESMS.2015.7175844
M3 - Conference contribution
AN - SCOPUS:84950987225
T3 - 2015 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems, EESMS 2015 - Proceedings
SP - 12
EP - 16
BT - 2015 IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems, EESMS 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE Workshop on Environmental, Energy, and Structural Monitoring Systems, EESMS 2015
Y2 - 9 July 2015 through 10 July 2015
ER -