SHEAR WALLS IRREGULAR DISTRIBUTION
SHEAR WALLS IRREGULAR DISTRIBUTION
(OP)
GENTLEMEN:
I AM DOING AN ETABS MODEL WITH ( SHEAR WALLS IRREGULAR DISTRIBUTION ) DUE TO ARCH, DESIGN.
A BIG ECCENTRICALLY VALUE BETWEEN CENTER OF RIGIDITY AND CENTER OF MASS IS RESULTED.
DO I HAVE TO CONSIDER THE ECCENTRICALLY VALUE WHILE CALCULATING SEISMIC FORCES ( BY AUTOMATIC SEISMIC FORCE CALCULATION ) OR IT WILL BE CONSIDERED AUTOMATICALLY BY THE PROGARM?
I AM DOING AN ETABS MODEL WITH ( SHEAR WALLS IRREGULAR DISTRIBUTION ) DUE TO ARCH, DESIGN.
A BIG ECCENTRICALLY VALUE BETWEEN CENTER OF RIGIDITY AND CENTER OF MASS IS RESULTED.
DO I HAVE TO CONSIDER THE ECCENTRICALLY VALUE WHILE CALCULATING SEISMIC FORCES ( BY AUTOMATIC SEISMIC FORCE CALCULATION ) OR IT WILL BE CONSIDERED AUTOMATICALLY BY THE PROGARM?





RE: SHEAR WALLS IRREGULAR DISTRIBUTION
RE: SHEAR WALLS IRREGULAR DISTRIBUTION
RE: SHEAR WALLS IRREGULAR DISTRIBUTION
Once the analysis is complete, you can see that the program has calculated a diaphragm center of rigidity and center of mass and the associated eccentricities.
RE: SHEAR WALLS IRREGULAR DISTRIBUTION
I HAVE APPLIED SEISMIC LOADS ACCORDING TO UBC-97 ( AUTO LATERAL LOADS). WITH DIFFERENT ECCENERCITIES VALUES BY ADDING
AND/OR DELETING WALLS TO CHANGE THE POSITION of center OF RIGIDITY.the results load values ( T ,Mx and My) are still the same. i think that we have to apply manually the eccentercity value at each floor.
would you advise once again
RE: SHEAR WALLS IRREGULAR DISTRIBUTION