WG2 – Modelling of Cement-Based Materials and Structures
Numerical Benchmarking

One of the major objectives of WG2 of the COST Action TU1404 is the numerical benchmark focused on modelling of cement-based materials and structures. The benchmark cases considered include different scales of modelling, i.e. micro- meso- and macroscopic modelling.

We believe that taking part in numerical benchmark campaign brings immediate benefits both to the researchers and industrial partners that develop the models, as a means of verifying their assumptions and methods, as well as to the users, both experienced and new, since it allows to better understand the models and to raise awareness regarding the credibility of modelling results. Therefore, participation in benchmark programs run by COST Action TU1404 is open to all interested participants, also outside the COST Action. We are looking forward to all contributions. Please contact: Mateusz.wyrzykowski@empa.chagnieszka.jedrzejewska@polsl.plfarid.benboudjema@dgc.ens-cachan.fr.

Openness of the shared results

By joining the benchmark campaign and sharing the results, the participants agree that the results will be reported together with the names of participants to the public in form of the COST Action TU1404 publications (booklets, leaflets, etc.) and as COST Action TU1404-related presentations (conferences, workshops, etc.). The copyrights to the publications will be maintained by COST Action TU 1404.

In case of joint journal publications containing the results, the agreement of the participants to publish their results will be asked by coordinators. Joint publications will be always discussed and will need approval of the participants that agreed to act as co-authors.

The planned benchmark program consists of the following parts:

STAGE 1: Simple examples – Completed
Aims:
  • to serve as a platform to get to know and better integrate different modelling tools used by different participants,
  • to prepare for Stage 2 benchmark (with RRT+): recognize model capabilities, key parameters and limitations.
The Examples:
  • fully open, i.e. the participants have access to all input data as well as final results;
  • based on published experimental data.

The first stage of benchmark was divided into macroscopic and microscopic modelling approaches. Thoroughly prepared examples were proposed by the members of the Action to be disseminated among the members of WG2.

Benchmark cases for macro-modelling – contact person: Agnieszka Knoppik
Benchmark cases for micro-modelling  – contact person: Mateusz Wyrzykowski

The results of this stage of the benchmark have already been presented at the MSSCE 2016 conference in Denmark on 23 August 2016 and at the CONCRACK5 conference in Tokyo on 25 April 2017.

Two papers are being prepared to be submitted to a peer-reviewed journal.
STAGE 2: Modelling of the data in connection to RRT+ - open
Aims:
  • to validate the models against large dataset of experimental results, with an access to a very extensive set of input parameters.
The Examples:
  • based on the experimental campaign of RRT+.

The aim of this stage is to benchmark the currently used models for simulation of CBMs behaviour on advanced examples divided into 4 main topic groups: microscopic, macroscopic, multiscale and durability, supervised by GP2 leaders:

TOPIC GROUP 1: microscopic modelling by Guang Ye
TOPIC GROUP 2: multiscale modelling by Bernhard Pichler
TOPIC GROUP 3: macroscopic modelling by Vít Šmilauer, and Matthieu Briffaut
TOPIC GROUP 4: modelling transport properties by Ravi Patel

The updates on this stage of benchmark program are posted on PROJECT PAGE.
STAGE 3: Real structures – Open
Aims:
  • to show the capabilities of the macroscopic models for prediction of the behaviour of real structures.
The Examples:
  • Based on the EDF Vercors structure.

In this stage the goal is to use the model validated in stage 2 on the concrete of RTT+ in simulation of a real structure cast with very similar concrete. The interested COST members are invited to join the Vercors 2018 benchmark proposed by EDF. This benchmark is carrier out on an experimental mock-up of a reactor containment building at 1/3 scale built at the EDF Lab "Les Renardières" near Paris. Execution of this mock-up has been completed in 2015. The mock-up is finely instrumented and its behaviour is monitored from the beginning of the construction.

To join this benchmark go to PROJECT PAGE