TY - GEN
T1 - Simulating acoustic nonlinearity change in accelerated mortar bar tests
T2 - 4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014
AU - Alnaggar, M.
AU - Cusatis, G.
AU - Qu, J.
AU - Liu, M.
N1 - Publisher Copyright:
© 2015 Taylor & Francis Group, London.
PY - 2015
Y1 - 2015
N2 - Alkali silica reaction (ASR) in concrete is a complex, multi-scale chemo-mechanical problem characterized by expansion and cracking of concrete meso-structure resulting in mechanical properties degradation. Currently available standardized tests to investigate concrete vulnerability to ASR (accelerated mortar bar test and concrete prism test) can give some insight for new structures, however, the assessment of residual load carrying capacity of existing ASR affected structures mostly rely on destructive evaluations. Promising alternatives are ultrasonic nondestructive evaluation techniques, but, they don’t provide a direct measurement of the damage characteristics and mechanical properties deterioration. This paper integrates nondestructive measurements with accurate computational modeling of ASR induced damage using the Lattice Discrete Particle Model (LDPM), a mesoscale model for concrete with superior modeling capability of fracturing behavior that was recently extended to account for ASR damage. The numerical simulations demonstrate the ability to replicate ultrasonic nonlinear phenomena and show its strong correlation with cracking evolution.
AB - Alkali silica reaction (ASR) in concrete is a complex, multi-scale chemo-mechanical problem characterized by expansion and cracking of concrete meso-structure resulting in mechanical properties degradation. Currently available standardized tests to investigate concrete vulnerability to ASR (accelerated mortar bar test and concrete prism test) can give some insight for new structures, however, the assessment of residual load carrying capacity of existing ASR affected structures mostly rely on destructive evaluations. Promising alternatives are ultrasonic nondestructive evaluation techniques, but, they don’t provide a direct measurement of the damage characteristics and mechanical properties deterioration. This paper integrates nondestructive measurements with accurate computational modeling of ASR induced damage using the Lattice Discrete Particle Model (LDPM), a mesoscale model for concrete with superior modeling capability of fracturing behavior that was recently extended to account for ASR damage. The numerical simulations demonstrate the ability to replicate ultrasonic nonlinear phenomena and show its strong correlation with cracking evolution.
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U2 - 10.1201/b17618-64
DO - 10.1201/b17618-64
M3 - Conference contribution
AN - SCOPUS:84941236271
SN - 9781138001206
T3 - Life-Cycle of Structural Systems: Design, Assessment, Maintenance and Management - Proceedings of the 4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014
SP - 451
EP - 458
BT - Life-Cycle of Structural Systems
A2 - Furuta, Hitoshi
A2 - Frangopol, Dan M.
A2 - Akiyama, Mitsuyoshi
Y2 - 16 November 2014 through 19 November 2014
ER -