Dear Sirs,
While defining the Rigid Floor Diaphragms, there are two methods - using Master Slave ZX command and the second (newer method) is to use Floor Diaphragm command
Couple of days back in an eSeminar, I was informed (Mr. Kris Sathia was the presenter) that the Rigid Floor Diaphragm specification is superior to using Master Slave command for the following reasons
1. We can get Center of Rigidity and Center of Mass calculated with this
2. Master Slave ZX commands are automatically created internally
3. A master node is created internally at center of mass (not added if master node is specified or node already exists at center of mass)
However, I am told that in order to use the Floor Diaphragm command, we need to create a Mass Model in a Reference load to add Joint, Member and Floor Weights (similar to older method of creating seismic weight). Does this have to be created with full live load, or with partial live load? Theoretically, I would assume that full live load (including roof live load) has to be applied to estimate diaphragm rigidity. However, the same mass model is used for seismic weight calculation (you can only add to the weights). Hence, I want to know how exactly this is to be used
Thanks in advance
Arunkumar