Re: Excentrisidad accodental
Publicado: Lun May 05, 2008 8:18 pm
Lamentablemente tienes razon KaoKao, al parecer no se produce ningun cambio, incluso probe con factores de 100 jajaja. debe tratarse de un error en el programa.
Con el etabs si funciona perfectamente, es mas, casi nunca diseño edificios con el sap2000, lo uso mas para estructuras que no tienen diafragmas rigidos.
Te anexo lo que dice la ayuda del sap2000:
Diaphragm Eccentricities The diaphragm eccentricity option has meaning only if the model has diaphragms. SAP2000 ignores eccentricities where diaphragms are not present. Where diaphragms are present, SAP2000 calculates a maximum width of the diaphragm perpendicular to the direction of the seismic loading. This width is calculated by finding the maximum and minimum X or Y coordinates (depending on direction of load considered) of the points that are part of the diaphragm constraint and determining the distance between these maximum and minimum values. After the appropriate diaphragm width has been determined, SAP2000 applies a moment that is equal to the specified percent eccentricity times the maximum width of the diaphragm perpendicular to the direction of the seismic loading times the total lateral force applied to the diaphragm. This moment is applied about the diaphragm center of mass to account for the eccentricity.
Click the Override button to display the Override Diaphragm Eccentricities form and modify eccentricities on a diaphragm-by-diaphragm basis.
Como puedes ver la eccentricidad adicional se asigna de esta manera, lo dice el programa, pero creo que el programa tiene un error asi como tiene muchos otros, te recomiendo usar el etabs si se trata de una estructura regular.
Con el etabs si funciona perfectamente, es mas, casi nunca diseño edificios con el sap2000, lo uso mas para estructuras que no tienen diafragmas rigidos.
Te anexo lo que dice la ayuda del sap2000:
Diaphragm Eccentricities The diaphragm eccentricity option has meaning only if the model has diaphragms. SAP2000 ignores eccentricities where diaphragms are not present. Where diaphragms are present, SAP2000 calculates a maximum width of the diaphragm perpendicular to the direction of the seismic loading. This width is calculated by finding the maximum and minimum X or Y coordinates (depending on direction of load considered) of the points that are part of the diaphragm constraint and determining the distance between these maximum and minimum values. After the appropriate diaphragm width has been determined, SAP2000 applies a moment that is equal to the specified percent eccentricity times the maximum width of the diaphragm perpendicular to the direction of the seismic loading times the total lateral force applied to the diaphragm. This moment is applied about the diaphragm center of mass to account for the eccentricity.
Click the Override button to display the Override Diaphragm Eccentricities form and modify eccentricities on a diaphragm-by-diaphragm basis.
Como puedes ver la eccentricidad adicional se asigna de esta manera, lo dice el programa, pero creo que el programa tiene un error asi como tiene muchos otros, te recomiendo usar el etabs si se trata de una estructura regular.