Some computational aspects of tensile strain localization modelling in concrete

✍ Scribed by Nenad Bićanić; Pankaj

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 753 KB
• Volume: 35
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(90)90152-7

✦ Synopsis

Basic compu~tion~ aspects of concrete strain localization and ways to avoid load step sensitivity are discussed, as numerical algorithms usually adopted for hardening plasticity may lead to load step sensitive results, when applied to softening plasticity problems. Elasto-viscoplastic algorithm for tensile localization in concrete is also considered. Employing constant fracture energy release rate concept, mesh insensitive steady state solutions are obtained. However, mesh (characteristic length) sensitive fluidity parameter is required in order to obtain objective time histories of stress reduction as the steady state is approached. Simple illustrative finite element examples involving tensile concrete specimen are included.