I am trying to solve a structure where the superstructure is a mix of RCC and steel and the substructure is of RCC, and it is partially resting on a river. So while trying to run the analysis, I am getting the error as "PROBABLE CAUSE NEGATIVE DIAGONAL =>LDLT MTX".
I tried to apply partial release of MZ and MY, but did not solve my problem.
Also, I am getting an error "PROBABLE CAUSE SINGULAR-ADDING WEAK SPRING" which I am clueless what to do about it.
Hi Atindom Bora,
In most cases these messages are reported for models having instabilities, poor connectivity and other modeling issues.
Please check this Communities Wiki:https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/29017/instability-warnings-probable-cause-singular-adding-weak-springAlso, this forum thread may be useful regarding Negative Diagonal message:https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/110391/error-at-joint
Hello Andrej Logunov,
I tried looking into the following discussions but these solutions didnot help me solving my errors and warinings.
Please attach that STAAD.Pro model for the investigation.
Uploaded via secure file upload. Please find the file named as Crematorium
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