Research Article
Effect of Soil Flexibility on Seismic Force Evaluation of RC Framed Buildings with Shear Wall: A Comparative Study of IS 1893 and EUROCODE8
Table 5
Lateral natural period of building.
| Storeys | Base Condition | Lateral natural period of building (Sec) | Bare frame | SW1 | SW2 | Mode | Mode | Mode | 1 | 3 | 4 | 1 | 3 | 4 | 1 | 3 | 4 |
| 4 | Fixed | 0.85 | 0.71 | 0.26 | 0.18 | 0.16 | 0.06 | 0.35 | 0.21 | 0.08 | Sb | 1.00 | 0.75 | 0.29 | 0.19 | 0.17 | 0.06 | 0.36 | 0.21 | 0.08 | Sc | 1.00 | 0.75 | 0.29 | 0.22 | 0.17 | 0.06 | 0.38 | 0.22 | 0.09 | Sd | 1.00 | 0.75 | 0.29 | 0.29 | 0.17 | 0.08 | 0.42 | 0.26 | 0.09 | Se | 1.01 | 0.76 | 0.29 | 0.41 | 0.19 | 0.15 | 0.52 | 0.32 | 0.15 |
| 6 | Fixed | 1.19 | 1.00 | 0.37 | 0.32 | 0.23 | 0.08 | 0.59 | 0.37 | 0.14 | Sb | 1.37 | 1.05 | 0.41 | 0.34 | 0.24 | 0.08 | 0.60 | 0.37 | 0.14 | Sc | 1.37 | 1.05 | 0.41 | 0.37 | 0.24 | 0.08 | 0.62 | 0.38 | 0.15 | Sd | 1.37 | 1.05 | 0.41 | 0.47 | 0.25 | 0.09 | 0.68 | 0.42 | 0.16 | Se | 1.39 | 1.05 | 0.41 | 0.64 | 0.26 | 0.15 | 0.80 | 0.51 | 0.17 |
| 8 | Fixed | 1.50 | 1.25 | 0.48 | 0.45 | 0.27 | 0.10 | 0.81 | 0.52 | 0.20 | Sb | 1.72 | 1.32 | 0.53 | 0.48 | 0.27 | 0.11 | 0.83 | 0.53 | 0.20 | Sc | 1.72 | 1.32 | 0.53 | 0.53 | 0.28 | 0.11 | 0.86 | 0.54 | 0.21 | Sd | 1.73 | 1.32 | 0.53 | 0.67 | 0.28 | 0.12 | 0.94 | 0.60 | 0.22 | Se | 1.75 | 1.33 | 0.54 | 0.90 | 0.29 | 0.16 | 1.11 | 0.71 | 0.24 |
| 12 | Fixed | 2.19 | 1.77 | 0.68 | 0.84 | 0.40 | 0.18 | 1.36 | 0.90 | 0.35 | Sb | 2.51 | 1.90 | 0.77 | 0.87 | 0.41 | 0.19 | 1.38 | 0.91 | 0.36 | Sc | 2.52 | 1.90 | 0.77 | 0.95 | 0.41 | 0.20 | 1.42 | 0.93 | 0.37 | Sd | 2.54 | 1.90 | 0.77 | 1.15 | 0.41 | 0.22 | 1.53 | 0.99 | 0.38 | Se | 2.59 | 1.91 | 0.77 | 1.49 | 0.43 | 0.24 | 1.78 | 1.13 | 0.41 |
| 16 | Fixed | 3.00 | 2.28 | 0.89 | 1.28 | 0.50 | 0.27 | 1.98 | 1.31 | 0.52 | Sb | 3.51 | 2.50 | 1.01 | 1.34 | 0.52 | 0.28 | 2.02 | 1.32 | 0.53 | Sc | 3.52 | 2.50 | 1.01 | 1.46 | 0.52 | 0.30 | 2.07 | 1.35 | 0.54 | Sd | 3.55 | 2.50 | 1.02 | 1.76 | 0.53 | 0.33 | 2.25 | 1.44 | 0.56 | Se | 3.66 | 2.51 | 1.02 | 2.25 | 0.54 | 0.35 | 2.64 | 1.63 | 0.60 |
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