Material Characterization Approach for Modeling High-Strength Concrete after Cooling from Elevated Temperatures

Journal article (2021)

Authors

Assis Arano Norwegian University of Science and Technology (NTNU)
Matteo Colombo Politecnico di Milano
Paolo Martinelli Politecnico di Milano
Jan Arve Øverli Norwegian University of Science and Technology (NTNU)
M.A.N. Hendriks Applied Mechanics - CEG , Norwegian University of Science and Technology (NTNU)
Terje Kanstad Norwegian University of Science and Technology (NTNU)
Marco Di Prisco Politecnico di Milano
Research Group
Applied Mechanics (CEG) (TU Delft)
Copyright: © 2021 Assis Arano, Matteo Colombo, Paolo Martinelli, Jan Arve Øverli, M.A.N. Hendriks, Terje Kanstad, Marco Di Prisco
DOI: https://doi.org/10.1061/(ASCE)MT.1943-5533.0003694
Fracture energy Concrete mechanical properties Internal damage evolution Residual conditions Thermal exposure Uniaxial tensile tests
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Published Date

2021

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Applied Mechanics

Abstract

Advanced numerical modeling of high-strength concrete (fc>60 MPa) structures designed to withstand severe thermal conditions requires detailed and reliable information on the mechanical properties of the material exposed to elevated temperatures. The only uniaxial compressive strength variation with temperature is not enough to satisfy the large number of parameters often required by advanced nonlinear constitutive models. For this reason, a complete experimental investigation is required. The paper takes a commonly used high-strength concrete (fc=73 MPa) as an example to describe a comprehensive experimental approach instrumental to the parameter definition and calibration of common constitutive models for concrete. The present study not only studied the overall compressive and tensile behavior of the case study material, but also investigated the effect of elevated temperatures on the specific fracture energy and the evolution of internal damage, in residual conditions after a single thermal cycle at 200°C, 400°C, and 600°C.