Print Email Facebook Twitter Experimentally informed modeling of the early-age stress evolution in cementitious materials using exponential conversion from creep to relaxation Title Experimentally informed modeling of the early-age stress evolution in cementitious materials using exponential conversion from creep to relaxation Author Liang, M. (TU Delft Materials and Environment) Luzio, Giovanni Di (Politecnico di Milano) Schlangen, E. (TU Delft Materials and Environment) Šavija, B. (TU Delft Materials and Environment) Date 2024 Abstract This study presents comprehensive numerical modeling methods for simulating early-age stress (EAS) relaxation in cementitious materials, based on the autogenous deformation (AD), elastic modulus, creep, and stress continuously tested by a mini temperature stress testing machine (Mini-TSTM) and a mini AD testing machine from a very early age (i.e., from a few hours to a week). Four methods for converting creep compliance to relaxation modulus were discussed in detail and used for the one-dimensional (1D) and three-dimensional (3D) simulation of stress evolution in the Mini-TSTM test. Furthermore, virtual creep and relaxation tests were conducted using an exponential algorithm with either the Kelvin or Maxwell chains to show their applicability in simulating the viscoelastic behavior of early-age cementitious materials. The results showed that the exponential algorithm with the Maxwell chain using an exponential conversion function from creep to relaxation obtains good prediction accuracy of EAS in 3D analysis. The numerical solutions of the Volterra integral of creep compliance can lead to a negative relaxation modulus, thus introducing stress calculation errors in both 1D and 3D analysis. To reference this document use: http://resolver.tudelft.nl/uuid:76accbdf-6bc7-4841-ad12-39de813cdbb3 DOI https://doi.org/10.1111/mice.13156 ISSN 1093-9687 Source Computer-Aided Civil and Infrastructure Engineering Part of collection Institutional Repository Document type journal article Rights © 2024 M. Liang, Giovanni Di Luzio, E. Schlangen, B. Šavija Files PDF Computer_aided_Civil_Eng_ ... ion_in.pdf 6.68 MB Close viewer /islandora/object/uuid:76accbdf-6bc7-4841-ad12-39de813cdbb3/datastream/OBJ/view