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Mode | Natural Period | ||||||
| Independent | SAP2000 | MIDAS | OpenBrIM | Percent Difference (SAP2000 vs Independent) | Percent Difference (MIDAS vs Independent) | Percent Difference (OpenBrIM vs Independent) | |
|---|---|---|---|---|---|---|---|
| 1st | 0.01790 | 0.01781 | 0.01724 | T1: 0.01723 | -0.5028% | -3.6872% | T1%: -3.7430%T1; |
| 2nd | 0.00732 | 0.00648 | 0.00710 | T2: 0.00701 | -11.4754% | -3.0055% | T2%: -4.2350%T2; |
| 3rd | 0.00292 | 0.00285 | 0.00284 | T3: 0.00282 | -2.3973% | -2.7397% | T3%: -3.4247%T3; |
| 4th | 0.00228 | 0.00223 | 0.00223 | T4: 0.00221 | -2.1930% | -2.1930% | T4%: -3.0702%T4; |
| 5th | 0.00201 | 0.00187 | 0.00197 | T5: 0.00194 | -6.9652% | -1.9900% | T5%: -3.4826%T5; |