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73 floor building , model does not show the modes when using Ritz vectors

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ramiibrahim

ramiibrahim

Structural
Jan 22, 2013
4
US
I have received an ETABS model from the consultant but when I try to run the model using the Ritz vector it does not give me any mode shape but when I changed the Modal into Eigen I got the mode shapes and periods . any reasons for this issue ?
 
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Please repost this in the correct forum: forum802

 
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