Obtaining centre of rigidity in Etabs
Obtaining centre of rigidity in Etabs
(OP)
CSI knowledge Base tells This:
""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""
But the option 'Centers of Mass and Rigidity' is not there inside 'Structural Results' in Etabs.
Please help me on this..
Ravi K
""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""
But the option 'Centers of Mass and Rigidity' is not there inside 'Structural Results' in Etabs.
Please help me on this..
Ravi K





RE: Obtaining centre of rigidity in Etabs
RE: Obtaining centre of rigidity in Etabs
Thanks..
How can we increase the eccentricity in the model ?
if eccentricity = 1.5*structural + 5% accidental.
RE: Obtaining centre of rigidity in Etabs
Is "Calculate Diaphragm Centers of Rigidity" checked?
RE: Obtaining centre of rigidity in Etabs
Now it is showing the option 'Centers of Mass and Rigidity.
Thanks
How can we increase the eccentricity in the model ?
if eccentricity = 1.5*structural + 5% accidental.
RE: Obtaining centre of rigidity in Etabs
That's under Define > Load Cases
(I'm assuming you're running a response spectrum case)
RE: Obtaining centre of rigidity in Etabs
No, I am not running a response spectrum case. I am only applying lateral load calculated by seismic coefficient method at the frame joints. I wanted to increase the eccentricity value for safer design. But i could not find the the option in Etabs.
RE: Obtaining centre of rigidity in Etabs
If you meant code static loads it should be on the top left corner