Hi Attached below is my staad model for a simple pendulum.I am having these warnings: ***WARNING - INSTABILITY AT JOINT 2 DIRECTION = FY
Can anyone check my model, please?
STAAD PLANESTART JOB INFORMATIONENGINEER DATE 10-Aug-23END JOB INFORMATIONINPUT WIDTH 79UNIT METER KNJOINT COORDINATES1 0 0 0; 2 0 0.9 0;MEMBER INCIDENCES1 2 1;DEFINE MATERIAL STARTISOTROPIC STEELE 2.05e+008POISSON 0.3DENSITY 76.8195ALPHA 1.2e-005DAMP 0.03TYPE STEELSTRENGTH FY 253200 FU 407800 RY 1.5 RT 1.2END DEFINE MATERIALMEMBER PROPERTY AMERICAN1 PRIS YD 0.01CONSTANTSMATERIAL STEEL ALLMEMBER TENSION 1SUPPORTS2 FIXED BUT FY FZ MXLOAD 1 LOADTYPE Dead TITLE GSELFWEIGHT Y -1 JOINT LOAD1 FY -0.245LOAD 2 LOADTYPE Seismic TITLE EXJOINT LOAD1 FX 0.1LOAD 3 LOADTYPE Seismic TITLE EYJOINT LOAD1 FY -0.295LOAD COMB 6 EY+EX2 1.0 3 1.0 PERFORM ANALYSISFINISH