Advanced numerical study of composite steel-concrete structures at high temperature.
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2021
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Resumo
The composite steel-concrete structures use has several advantages, such as the reduction of
cross-sectional dimensions and weight of the structure, which is one of the main reasons for it is
use today. However, under fire situation, the material and mechanical properties changes, causing
significant strength and stiffness loss as a result of temperature rise. In this work, the temperature
influence on the behavior of composite steel-concrete structures is studied through an inelastic
second order (ISO) numerical investigation. For this, two computational modules, CS-ASA/FA and
CS-ASA/FSA are developed and adapted for the study of composite structures in fire. The first
module calculates the temperature field in any cross-section. The second module performs the
ISO analysis through the coupling between the Refined Plastic Hinge Method (RPHM) and the
Strain Compatibility Method (MCD). In this way, the evolution of the temperature in cross-sec-
tions, the interaction diagrams between axial force and bending moment and the structures equi-
librium path as a function of the time in fire are presented for composite steel-concrete beams,
columns and frames. The proposed numerical methodology success is proved by comparison with
experimental and numerical responses available in the literature.
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Fire, Thermal analysis, Thermo-structural analysis, Refined Plastic Hinge Method/Strain Compatibility Method coupling
Citação
BARROS, R. C. et al. Advanced numerical study of composite steel-concrete structures at high temperature. Ce/papers, v. 4, p. 1421-1428, 2021. Disponível em: <https://onlinelibrary.wiley.com/doi/full/10.1002/cepa.1440>. Acesso em: 29 abr. 2022.