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For building structural systems, 3D analysis model is created automatically. |
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The stiffness of cracked sections are generated automaticaly. |
The stiffness and strength of elements which that are important to the distribution of deformations and forces are included in the analysis.
The model includes includes ‘stiffness properties of cracked concrete sections’ and sections’ and the contribution of panel zone deformations for for steel moment frames.
For building structural systems, a 3D analysis model is created automatically. Structures that have with horizontal structural irregularity Type 1a, 1b, 4, or 5 of Table 12.3-1 must be analyzed using a 3D representation. A minimum of three degrees of freedom consisting of translation in two orthogonal plan directions and rotation about the vertical axis are included, and the designer can interfere with the freedoms from structural tree - modal analysis case - dynamic degrees of freedomthe modal analysis section in the structure tree.
If the diaphragms have been classified as semi-rigid, the model includes a representation of the diaphragm’s stiffness characteristics, and , the diaphragm’s degrees of freedom and stifness stiffness are included in dynamic analysis.
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