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The independent results are hand calculated using the unit load method described on page 244 in Cook and Young 1985. In addition, the torsional stiffness of the section, J, is calculated using item 4 in Table 20 on page 290 in Roark and Young 1975. Independent results are also published in MacNeal and Harder 1985.
COMPARISION WITH INDEPENDENT RESULTS
| Load Case And Type | Model And Element Shape | Output Parameter | OpenBrIM | SAP2000 | Independent | Percent Difference (OpenBrIM vs SAP2000) | Percent Difference (OpenBrIM vs Independent) |
|---|---|---|---|---|---|---|---|
Axial Extension | A- Rectangle |
in | 0.00003 | 0.00003 |
0.00%
0.00003 |
| 0.00% |
0.00% |
| B - |
| Trapezoid | 0.00003 |
Out-of-plane shear and bending
Uy
Average of jts 7 and 14
in
| 0.00003 |
In-plane shear and bending
Average of jts 7 and 14
in
| 0.00% | 0.00% |
| C - Parallelogram | 0. |
| 00003 | 0. |
0.42900
Twist
Average of absolute values at jts 7 and 14
in
In-Plane Moment
Ux
Average of absolute values at jts 7 and 14
in
Out-of-Plane Moment
Average of values at jts 7 and 14radians
COMPARISION WITH SAP2000 RESULTS
in
0.| 00003 | 0.00% | 0.00% | |
| D - Triangle 2 | 0.00003 | 0.00003 | 0.00% |
| 0. |
| 00% | ||
| E – Triangle 4 | 0.00003 | 0.00003 |
| 0.00% |
| 0.00% | |||||||
Load case 2 In-plane shear and bending | A- Rectangle |
in | 0.09768 | 0.1072 |
| -8.88% | -9.64% |
| B - Trapezoid | 0.08817 | 0.0227 | 74.26% | -18.44% | |||
| C - Parallelogram | 0.09755 | 0.0804 | 17.57% | -9.76% | |||
| D - Triangle 2 | 0.11573 | 0.0032 | 97.23% | 7.06% | |||
| E – Triangle 4 | 0.00865 | 0.0066 | 23.73% | -92.00% | |||
Load case 3 Out-of-plane shear and bending | A- Rectangle | Uy in | 0.43200 | 0.4320 | 0.43210 | 0% | -2.31% |
| B - Trapezoid | 0.43227 | 0.4322 | 0% | 3.93% | |||
| C - Parallelogram | 0.43219 | 0.4322 | 0% | 2.08% | |||
| D - Triangle 2 | 0.42844 | 0.4296 | -0.27% | -8.47% | |||
| E – Triangle 4 | 0.42900 | 0.4314 | -0.056% | -7.18% |
| Load Case And Type | Model And Element Shape | Output Parameter | OpenBrIM | SAP2000 | Independent | Percent Difference (OpenBrIM vs SAP2000) | Percent Difference (OpenBrIM vs Independent) |
|---|---|---|---|---|---|---|---|
Load case 4 Twist | A- Rectangle |
in | 0.00233 | 0.00233 | 0.00341 | 0.02% | -31.67% |
| B - Trapezoid | 0.00233 | 0.00233 | 0.01% | -31.67% | |||
| C - Parallelogram | 0.00233 | 0.00233 | 0.01% | -31.67% | |||
| D - Triangle 2 | 0.00219 | 0.00231 | 0.64% | -35.78% | |||
| E – Triangle 4 | 0.00201 | 0.00230 | 0.23% | -41.03% | |||
Load case 5 In-Plane Moment | A- Rectangle | Ux in | 0.00082 | 8.990E-04 | 0.0009 | -8.89% | -8.89% |
| B - Trapezoid | 0.00074 | 1.395E-04 | -81.2% | -17.78% | |||
| C - Parallelogram | 0.00082 | 7.225E-04 | 10.94% | -8.89% | |||
| D - Triangle 2 | 0.00097 | 0.265E-04 | 97.27% | 7.78% | |||
| E – Triangle 4 | 0.00007 | 0.550E-04 |
| 21.93% | -92.22% | ||||||
Load case 6 Out-of-Plane Moment | A- Rectangle |
radians | 0.036 | 0.036 | 0.036 | 0.00% | 0.00% |
| B - Trapezoid | 0.036 | 0.036 | 0.00% | 0.00% | |||
| C - Parallelogram | 0.036 | 0.036 | 0.00% | 0.00% | |||
| D - Triangle 2 | 0.036 | 0.036 | 0.00% | 0.00% | |||
| E – Triangle 4 | 0.036 | 0.036 | 0.00% | 0.00% |