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- Eigenvalue analysis of a frame with unequal moment of inertia values (I22 != I33) for bending modes
- Automatic frame subdivision
App
ModelA Link: https://openbrim.org/objidczxsgh7tb69rgs3zk5m1g.project
ModelB Link: https://openbrim.org/objidqqopy5rvy2qiboxhtpv02l.project
ModelC Link: https://openbrim.org/objid1cndqskn2drnodmscp6b4q.project
ModelD Link: https://openbrim.org/objidzt1ow6mzzi2rfohe979fa.project
ModelE Link: https://openbrim.org/objidwd0frmg7scaua9v7emscif.project
ModelF Link: https://openbrim.org/objidlfvi1380m3n7f52halcb9o.project
ModelG Link: https://openbrim.org/objidqn1kezvv9yq7rnkjs7qlk.project
Library
ModelA Link: https://openbrim.org/objidihqfiwjt84yynv7i47nwc.libobj
ModelBLink: https://openbrim.org/objidfq0gjfcc4a6ck42sgwe6jc.libobj
ModelC Link: https://openbrim.org/objid8dal20a60xeagtrtslw054.libobj
ModelD Link: https://openbrim.org/objidcgq90dbt9nb8wiivdct513.libobj
ModelE Link: https://openbrim.org/objidatw1sup9tdjcj6kcc3bkm.libobj
ModelF Link: https://openbrim.org/objidldqd7v6hn9nhbihxsc5pk.libobj
ModelG Link: https://openbrim.org/objidxlk6861xsjad6byqnvhn.libobj
Mode | Output Parameter | Model | SAP 2000 | OpenBrIM | Independent | Percent Difference (SAP 2000 vs Independent) | Percent Difference (OpenBrIM vs Independent) |
|---|---|---|---|---|---|---|---|
1 First mode for bending about the Z-axis | Period, sec | A(1 elem) | 0.054547 | 0.0548 | 0.038005 | +43.53% | +44.19% |
B(2 elems) | 0.042333 | 0.0425 | +11.39% | +11.83% | |||
C(4 elems) | 0.039090 | 0.0393 | +2.85% | +3.41% | |||
D(6 elems) | 0.038485 | 0.0387 | +1.26% | +1.83% | |||
E(8 elems) | 0.038273 | 0.0385 | +0.71% | +1.30% | |||
F(10 elems) | 0.038175 | 0.0384 | +0.45% | +1.04% | |||
G(96 elems) | 0.038003 | 0.0382 | -0.01% | +0.51% | |||
2 First mode for bending about the Y-axis |
| A(1 elem) | 0.036364 | 0.0367 | 0.025337 | +43.52% | +44.85% |
| B(2 elems) | 0.028222 | 0.0285 | +11.39% | +12.48% | |||
| C(4 elems) | 0.026060 | 0.0264 | +2.85% | +4.20% | |||
| D(6 elems) | 0.025657 | 0.0260 | +1.26% | +2.62% | |||
| E(8 elems) | 0.025516 | 0.0259 | +0.71% | +2.22% | |||
| F(10 elems) | 0.025450 | 0.0258 | +0.45% | +1.83% | |||
| G(96 elems) | 0.025335 | 0.0257 | -0.01% | +1.43% | |||
3 Second mode for bending about the Z-axis |
| A(1 elem) | N.A. | N.A. | 0.006064 | N.A. | N.A. |
| B(2 elems) | 0.008218 | 0.0085 | +35.52% | +40.17% | |||
| C(4 elems) | 0.006651 | 0.0069 | +9.68% | +13.79% | |||
| D(6 elems) | 0.006330 | 0.0066 | +4.39% | +8.84% | |||
| E(8 elems) | 0.006214 | 0.0065 | +2.47% | +7.19% | |||
| F(10 elems) | 0.006160 | 0.0064 | +1.58% | +5.54% | |||
| G(96 elems) | 0.006065 | 0.0063 | +0.02% | +3.89% | |||
4 Second mode for bending about the Y-axis | Period, sec | A(1 elem) | N.A. | N.A. | 0.004043 | N.A. | N.A. |
| B(2 elems) | 0.005479 | 0.0059 | +35.52% | +45.93% | |||
| C(4 elems) | 0.004434 | 0.0048 | +9.67% | +18.72% | |||
| D(6 elems) | 0.004220 | 0.0046 | +4.38% | +13.78% | |||
| E(8 elems) | 0.004143 | 0.0045 | +2.47% | +11.30% | |||
| F(10 elems) | 0.004107 | 0.0045 | +1.58% | +11.30% | |||
| G(96 elems) | 0.004043 | 0.0044 | 0% | +8.83% | |||
5 Third mode for bending about the Z-axis | Period, sec | A(1 elem) | N.A. | N.A. | 0.002165 | N.A. | N.A. |
| B(2 elems) | N.A. | N.A. | N.A. | N.A. | |||
| C(4 elems) | 0.002511 | 0.0028 | +15.98% | +29.33% | |||
| D(6 elems) | 0.002321 | 0.0025 | +7.21% | +15.47% | |||
| E(8 elems) | 0.002254 | 0.0025 | +4.11% | +15.47% | |||
| F(10 elems) | 0.002222 | 0.0024 | +2.63% | +10.85% | |||
| G(96 elems) | 0.002166 | 0.0024 | +0.05% | +10.85% |
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