A mathematical model of the behaviour of concrete backfill in an underground radioactive-waste repository
This report is predominantly concerned with the development of a mathematical model for use within the ADINA finite element code to predict the time-dependent performance of concrete as a backfilling and sealing material of underground repositories for radioactive waste. The evaluation of creep and shrinkage strains is based on the CEB-FIP model code together with Illston's approach to delayed and transitional thermal strains. The method adopted in assessing the creep contributions of the general constitutive equations was that of the effective creep rate. The finite element material model developed (ADINA-RAD) is general and could be applied to various types of structure and loading. The model accounts for the ageing of concrete, multi-axial creep and creep recovery, the effect of external environmental humidity and changing internal temperatures. The model compares favourably with available published experimental data for maturing concrete but requires considerable further validation against a wider range of experimental results.
Bibliographic Reference: EUR 14090 EN (1992) 133 pp., FS, ECU 13.50
ISBN: ISBN 92-826-3857-X
Record Number: 199210574 / Last updated on: 1994-12-02
Original language: en
Available languages: en