haku: @keyword finite element method / yhteensä: 107
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| Tekijä: | Khan, Ghaffar |
| Työn nimi: | Experimental and numerical study of a shear wall of reinforced concrete |
| Julkaisutyyppi: | Diplomityö |
| Julkaisuvuosi: | 2015 |
| Sivut: | (8) + 49 s. + liitt. 27 Kieli: eng |
| Koulu/Laitos/Osasto: | Insinööritieteiden korkeakoulu |
| Oppiaine: | Rakennetekniikka (R3001) |
| Valvoja: | Puttonen, Jari |
| Ohjaaja: | Piironen, Jukka |
| Elektroninen julkaisu: | http://urn.fi/URN:NBN:fi:aalto-201512165574 |
| Sijainti: | P1 Ark Aalto 9617 | Arkisto |
| Avainsanat: | reinforced concrete concrete damage plasticity finite element method damping impact test ABAQUS/ Explicit |
| Tiivistelmä (eng): | Reinforced concrete shear walls are popular structural members with a particular importance in seismically active regions. This study aims to analyze a reinforced concrete shear wall by a finite element software suite using a material model based on damage plasticity and compare the numerical results with experimentally observed behavior. A reinforced concrete shear wall designed for this particular study has been tested in the laboratory using cyclic loads. The corresponding damage was evaluated after each load increment using the damping ratios computed using the log-decrement method. The wall was modeled and analyzed by a finite element software suite ABAQUS using ABAQUS/ Explicit analysis. In the numerical analysis, concrete has been modeled using the Concrete Damage Plasticity (CDP) material model and reinforcing steel by a bilinear stress-strain relation. The two materials were combined to represent reinforced concrete. Properties of the CDP material model have been derived based on the literature. A material model was first verified using bending tests on reinforced concrete beams with different load and support conditions and was then extended to modeling the shear wall in the present study. Results from laboratory testing of the shear wall and numerical analyses were compared and discussed. The CDP material model provides a good perspective of the cracking pattern and failure load of the structure. However, quantitative results could not be verified due to accidental dynamic loads during laboratory testing. They caused numerous hairline cracks in the test structure and may have affected the measured values in the strain transducers. However, both approaches gave a similar type of response in terms of strain increase within elastic range and crack opening upon the post-elastic range. Discrepancies and shortcomings between the numerical and experimental results were identified and suggestions presented for improving numerical modeling. Also, recommendations were given for future research on the topic. |
| ED: | 2016-01-17 |
INSSI tietueen numero: 52699
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