Analytical and finite element studies on behavior of FRP strengthened RC beams under torsion
| Autor: | Tarutal Ghosh Mondal, Anand Ganganagoudar, S. Suriya Prakash |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry 0211 other engineering and technologies Torsion (mechanics) Stiffness 020101 civil engineering 02 engineering and technology Structural engineering Fibre-reinforced plastic Finite element method 0201 civil engineering Stiffening Cracking Soil structure interaction 021105 building & construction Ultimate tensile strength Ceramics and Composites medicine Composite material medicine.symptom business Civil and Structural Engineering |
| Zdroj: | Composite Structures. 153:876-885 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2016.07.014 |
| Popis: | This paper presents analytical and finite element (FE) studies on behavior of FRP (fiber reinforced polymer) composite strengthened reinforced concrete (RC) beams under torsional loading. Presence of torsion significantly changes the failure mode of RC members and therefore it is essential to understand the efficiency of FRP strengthening under torsion. This study tries to fill the knowledge gap existing in this important area of research by carrying out analytical and FE studies. An improved softened membrane model for torsion (SMMT-FRP) considering the influence of FRP composites on the compressive behavior of cracked concrete is proposed. A new tension stiffening relationship of concrete is also recommended for improved analytical predictions. The analytical study is accompanied by a full scale nonlinear FE study using commercial package ABAQUS. Parameters such as post cracking stiffness, peak torque and peak twist are accurately captured by the improved SMMT-FRP. Finite element predictions are also compared with analytical predictions and experimental results. Comparisons indicate a reasonably good agreement of both analytical and FE results with test data. FRP strengthening increased the post-cracking stiffness, ultimate strength and localized the damage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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