HARDENING INDUCED STRESSES IN VERY THICK CONCRETE MEMBERS – INSIGHTS FROM COMPREHENSIVE FE-STUDIES

Author(s): Peter Joachim Heinrich, Dirk Schlicke
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 266-275
Total Pages: 10
Language : English

Abstract: This contribution presents first results of comprehensive FE-studies on hardening-induced
stress histories of very thick concrete members with compact dimensions. The motivation is
to improve the understanding of their structural behaviour in order to provide an efficient but
safe crack width control of such members. The strict application of current design rules would
lead to very high reinforcement amounts, even though observations in practice indicate that
serviceability can be ensured with much less reinforcement. Finally, the insights of these
investigations will provide a basis on which efficient design rules can be developed for very
thick concrete members. The FE-studies were conducted with a new constitutive law for
hardening concrete whereby special regard was put on the influence of the member thickness,
the ambient temperature as well as production conditions. In general, the results confirm the
predominance of residual stresses or so called Eigenstresses in such structural elements, while
restraint forces and restraint moments are of minor importance for usual subsoil conditions.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00