Civil MDC

Center of Mass and Center of Rigidity

Center of Mass and Center of Rigidity
What is center of rigidity? Center of rigidity is the stiffness centroid within a floor-diaphragm plan.
Center of Mass It is the average position of all the parts of the system, weighted according to their masses Check in CSI ETABS During analysis, ETABS automatically calculates this coordinate for each floor diaphragm. The diaphragm assignment must be present in the model. Center of rigidity and center of mass are then displayed by selecting Display –)) Show Tables –)) Analysis –)) Results –)) Structural Results –)) Centers of Mass and Rigidity –)) OK.

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