Title:
A Constitutive Law for Concrete at Transient High Temperature Conditions
Author(s):
Y. Anderberg and S. Thelandersson
Publication:
Symposium Paper
Volume:
55
Issue:
Appears on pages(s):
187-206
Keywords:
tion; high temperature rise
stresses
compressive strength;
tern erature; strains;
in concrete); thermal
concretes; creep properties; deforma-stress-
strain relationships; tempera-expansion;
thermal gradient; thermal
DOI:
10.14359/6614
Date:
8/1/1978
Abstract:
A computer-oriented constitutive model for concrete in compresslon, valid at first heating of concrete up to 800 C is described. The total deformation is expressed in terms of thermal, instantaneous stress-related, creep and transient strain components, where the transient strain is a concept introduced to describe the particular behavior under changing temperature. Comparisons with independent tests demonstrate that the material behaviour is described in a very appropriate way. The model is applied in a simple example calculation, showing that thermal stresses due to non-uniform temperature distribution are very insignificant or even nonexistant.Stresses due to restrained thermal expansion cannot in themselves contribute to compression failure of concrete.