mass eccentericity
mass eccentericity
(OP)
hi
i want to make a structure with assymetric plan by moving mass center. how can i do that?
yo know if sap does it right, torsinal mode and tansitional mode should be coupled.
but in my model, with diaphragm eccentericity , these modes arent coupled.
i want to make a structure with assymetric plan by moving mass center. how can i do that?
yo know if sap does it right, torsinal mode and tansitional mode should be coupled.
but in my model, with diaphragm eccentericity , these modes arent coupled.





RE: mass eccentericity
SAP automatically calculates the mass center according to the diaphragms in your model.
Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis
http://www.engissol.com/cross-section-analysis-des...
RE: mass eccentericity
With rigid diaphragm: Add eccentricity as a separate static load case. The response spectrum and eccentric load cases should then be combined with combos using eccentricity in + and - direction. Separate static cases must be run for each eccentricity considered.
With flexible or semi-rigid diaphragm: You can add accidental torsion without rigid diaphragms if you spread/distribute the torsional loading.