Development of load-bearing shell-type trc structures – initial numerical analysis

Research output: Contribution to book/conference proceedings/anthology/reportConference contributionContributedpeer-review

Abstract

In nature, shell structures can be found in diverse variations. Compared to straight beams, where the bending stress increases disproportionately due to its weight, shell structures can handle significantly larger spans with minimal material expenditure. In the ideal case, only membrane stresses prevail in such thin-walled structures. To reach a similar performance in structures made of textile reinforced concrete (TRC), one of the aims is to develop an analysis method and software solution appropriate for the design routine of thin-walled structures. This goal is realized by adopting the software Rhino 3D in combination with the programming environment Grasshopper 3D. Together with the utilization of commercial FEM software, this method provides access to an integration of failure criteria selected for the analysis purpose within the scope of the project. Additionally, potential shortcomings of the commercial software regarding material modeling and appropriate failure criteria for TRC can be investigated and overcome by a collaboration between scientists in experimental, design and computational subprojects of the CRC/TRR 280 which is devoted to new design strategies for carbon reinforced concrete structures. Firstly, one attractive constitutive model is the microplane approach. The formulation at hand combines damage and plasticity to model concrete in a realistic manner. Concrete initially behaves isotropically, from which anisotropy develops under increasing load. The model used in this contribution overcomes the downside of mesh dependencies by using a non-local damage formulation. This method also ensures a reliable convergence of the applied Newton type solver for the global system of equations. Secondly, the Multiscale Projection Method is capable of handling localization effects like cracks in shell-like structures. Crack initiation and propagation can be simulated introducing a phase-field method for fracture to the fine scale. This approach allows the detailed simulation of the mesoscale cracking behavior, which is significant for the overall failure of the macroscopic structure.

Details

Original languageEnglish
Title of host publicationProceedings for the 6th fib International Congress, 2022- Concrete Innovation for Sustainability
EditorsStine Stokkeland, Henny Cathrine Braarud
Place of PublicationLausanne
Publisherfib. The International Federation for Structural Concrete
Pages1799-1808
Number of pages10
ISBN (electronic)9782940643158
Publication statusPublished - Jun 2022
Peer-reviewedYes

Publication series

Seriesfib PhD Symposium 2022
Number59
ISSN2617-4820

Conference

Title6th fib International Congress
SubtitleConcrete Innovation for Sustainability
Abbreviated titlefib 2022
Conference number6
Duration12 - 16 June 2022
Degree of recognitionInternational event
LocationClarion Hotel The Hub
CityOslo
CountryNorway

External IDs

Scopus 85143892910
ORCID /0000-0002-8976-6680/work/142236484
ORCID /0000-0001-9453-1125/work/142237980
ORCID /0000-0002-9407-6633/work/142240929
ORCID /0000-0002-1596-7164/work/142255641