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Indexed by:期刊论文

Date of Publication:2015-01-01

Journal:ENGINEERING FRACTURE MECHANICS

Included Journals:SCIE、EI

Volume:134

Page Number:404-432

ISSN No.:0013-7944

Key Words:Thermo-mechanic-damage model; Mesoscopic level; Statistical distribution; Failure process

Abstract:A numerical model allowing for the thermo-mechanical analysis of quasi-brittle materials (concrete structures) at high temperatures via the finite element method and damage mechanics is presented. It incorporates a damage constitutive law to capture the initiation, propagation, coalescence and the interaction of cracks as a natural outcome of the calculated material response. Furthermore, the degradation of the mechanical properties due to temperature is estimated using a transient thermo-damage model. The numerical results obtained from the proposed model correspond well with those obtained in experimental tests performed by other authors on concrete specimens at high temperatures. (C) 2015 Elsevier Ltd. All rights reserved.