Muhsin Abu Ali
Structural
Hi
i am getting instability below warning message in my sap2000 file (LGS)
*** Warning Message 1 ***
Date & Time : 4/24/2022 10:31:42 AM
Computer : WDPFP0002
Run Tag : 0
Run Serial : 1
Operation : RUNNING ANALYSIS
Load Case : Solving Linear Stiffness from Zero (unstressed) initial conditions
THE STRUCTURE IS UNSTABLE OR ILL-CONDITIONED !! CHECK THE STRUCTURE CAREFULLY FOR: - INADEQUATE SUPPORT CONDITIONS, OR - ONE OR MORE INTERNAL MECHANISMS, OR - ZERO OR NEGATIVE STIFFNESS PROPERTIES, OR - EXTREMELY LARGE STIFFNESS PROPERTIES, OR - BUCKLING DUE TO P-DELTA OR GEOMETRIC NONLINEARITY, OR - A FREQUENCY SHIFT (IF ANY) ONTO A NATURAL FREQUENCY TO OBTAIN FURTHER INFORMATION: - USE THE STANDARD SOLVER, OR - RUN AN EIGEN ANALYSIS USING AUTO FREQUENCY SHIFTING (WITH ADDITIONAL MASS IF NEEDED) AND INVESTIGATE THE MODE SHAPES
*** Informational Message 1 ***
Date & Time : 4/24/2022 10:31:46 AM
Computer : WDPFP0002
Run Tag : 0
Run Serial : 1
Operation : RUNNING CASES IN SERIES
Load Case : N/A
TOTAL TIME FOR THIS ANALYSIS: 00:00:07
i am getting instability below warning message in my sap2000 file (LGS)
*** Warning Message 1 ***
Date & Time : 4/24/2022 10:31:42 AM
Computer : WDPFP0002
Run Tag : 0
Run Serial : 1
Operation : RUNNING ANALYSIS
Load Case : Solving Linear Stiffness from Zero (unstressed) initial conditions
THE STRUCTURE IS UNSTABLE OR ILL-CONDITIONED !! CHECK THE STRUCTURE CAREFULLY FOR: - INADEQUATE SUPPORT CONDITIONS, OR - ONE OR MORE INTERNAL MECHANISMS, OR - ZERO OR NEGATIVE STIFFNESS PROPERTIES, OR - EXTREMELY LARGE STIFFNESS PROPERTIES, OR - BUCKLING DUE TO P-DELTA OR GEOMETRIC NONLINEARITY, OR - A FREQUENCY SHIFT (IF ANY) ONTO A NATURAL FREQUENCY TO OBTAIN FURTHER INFORMATION: - USE THE STANDARD SOLVER, OR - RUN AN EIGEN ANALYSIS USING AUTO FREQUENCY SHIFTING (WITH ADDITIONAL MASS IF NEEDED) AND INVESTIGATE THE MODE SHAPES
*** Informational Message 1 ***
Date & Time : 4/24/2022 10:31:46 AM
Computer : WDPFP0002
Run Tag : 0
Run Serial : 1
Operation : RUNNING CASES IN SERIES
Load Case : N/A
TOTAL TIME FOR THIS ANALYSIS: 00:00:07
