Material nonlinear finite element analysis of hybrid hollow concrete beams encasing steel sections
| Autor: | Won-Kee Hong, Jin-Min Kim, Seong-Kyum Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Composite number 0211 other engineering and technologies Rebar 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Strain rate Plasticity Finite element method 0201 civil engineering law.invention Flexural strength law Precast concrete 021105 building & construction Architecture Safety Risk Reliability and Quality business Fireproofing Civil and Structural Engineering |
| Zdroj: | Structures. 25:500-519 |
| ISSN: | 2352-0124 |
| DOI: | 10.1016/j.istruc.2020.03.029 |
| Popis: | Steel-concrete composite precast frames reduce construction times with improved productivity and quality compared to conventional frames, and they can be assembled as rapidly as steel frames. However, composite frames can be heavy, complicating the overall erection progress. In this study, hollow composite precast beams, which weigh about 15% less than steel-concrete composite frames, preserve the merits of solid concrete beams, including reduced floor depth, and eliminate the fireproofing necessary for all-steel sections. A numerical investigation of the flexural strength of hollow concrete beams encasing steel sections was conducted using nonlinear finite element analysis (FEA) considering concrete damaged plasticity (CDP). Modeling showed no significant differences in flexural capacity between hollow and solid composite concrete beams. The numerical models with FEA parameters of dilation angle, eccentricity, fb0/fc0, Kc, and viscosity were calibrated for hollow composite beams using test data. The flexural strength of composite beams was evaluated based on embedded and tie models representing interfaces between the concrete and steel sections and concrete and rebar, respectively. Various numerical parameters, including rate of strain increase, were analyzed to investigate the structural behavior and degradation trends of hollow concrete beams encasing wide-flange steel sections. |
| Databáze: | OpenAIRE |
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