Experimental validation of the damage-plasticity modeling concept for normal strength concrete in fire. (7th August 2017)

• Record Type: Journal Article
• Authors: Neuenschwander, Martin; Scandella, Claudio; Knobloch, Markus; Fontana, Mario
• Is Part Of: Journal of structural fire engineering. Volume 9:Number 1(2018)
• Page Start: 53
• Page End: 62
• Publication Date: 2017-08-07
• Subjects: Temperature -- Finite element analysis -- Damage -- Compressive strength -- Elastic moduli -- Stiffness degradation; Fire protection engineering -- Periodicals; 628.92205
• DOI: 10.1108/JSFE-01-2017-0001
• Languages: English
• ISSNs: 2040-2317

Abstract

Abstract : Purpose: This paper aims to investigate with strain-rate controlled uniaxial cyclic compression tests the softening behavior of concrete and its elastic stiffness degradation with increasing plastic straining. Design/methodology/approach: Such tests at ambient temperature show that concrete exhibits the phenomenon of elastic stiffness degradation, which can be captured by damage-plasticity models. Findings: The experimentally derived evolutions of the elastic stiffness with plastic strain confirm the suitability of the damage-plasticity modeling concept for concrete in compression at elevated temperatures and provide novel calibration data. Originality/value: Temperature-dependent concrete models implementing this modeling concept are often used presently in structural fire engineering, despite the lack of experiment-based validation data.