ANALYTICAL MODEL FOR RESTRAINT STRAINS AND SELF-STRESSED IN EXPANSIVE CONCRETE FILLED STEEL TUBES (ECFST) ESTIMATION

  • Viktar V. Tur Brest State Technical University http://orcid.org/0000-0001-6046-1974
  • Radoslaw Duda Bialystok University of Technology
  • Dina Khmaruk Brest State Technical University
  • Viktar Basav Brest State Technical University

Аннотация

In this paper, a modified strains development model (MSDM) for expansive concrete-filled steel tube (ECFST) was formulated and verified on the experimental data, obtained from testing specimens on the expansion stage. The modified strain development model for restraint strains and self-stresses values estimation in concrete with high expansion energy capacity under any type of the symmetrical and unsymmetrical finite stiffness restraint conditions was proposed. Based on proposed MSDM a new model for expansive concrete-filled steel tubes is developed.  The main difference between this model and other previously developed models consists in taking into account in the basic equations an induced force in restrain that is considered as an external load applied to the concrete core of the member. For verification of the proposed model-specific experimental studies were performed.

As follows from comparison results restrained expansion strains values calculated following the proposed model shows good compliance with experimental data. The values predicted by the proposed MSDM for concrete-filled steel and obtained experimental data demonstrated good agreement that confirms the validity of the former.

Биографии авторов

Viktar V. Tur, Brest State Technical University

Head of Concrete Technology, Departament, Prof. DSc, Brest State Technical University, Brest, Belarus

Radoslaw Duda, Bialystok University of Technology

M.sc Departament of BuildingStructures, Bialystok University of Technology, Faculty of Civil and Environmental Engineering, Bialystok, Poland

Dina Khmaruk, Brest State Technical University

Doctoral Studet, Departament of Building Structures, Brest State Technical University, Brest, Belarus

Viktar Basav, Brest State Technical University

As. Prof., Dr-ing, Departament of Concrete Technology, Brest State Technical University, Brest, Belarus

Опубликован
2020-04-30