in seismic analysis of a ground,wo often use a shear beam contraint across the horizontal direction of the soil domain. According to this shear beam contraint, the two later boundaries (vertical sides)of the soil domain are contraint to deform similarly in the lateral direction by imposing equal horizontal degree of freedom constraints to pairs of lateral nodes at the same elevation.
my questin:In the shear beam mothod,which nodes should be tied toghter,just the nodes along the boundaries at the same level,or all the nodes(inluding the nodes in the soil domian but not at boundaries) at the same level?
boundary conditions in seismic analysis of a ground?
Moderators: silvia, selimgunay, Moderators
seismic analysis models
Hello There,
You just connect the nodes on the boundary for shear beam effects. However, I would strongly suggest looking into Domain Reduction Method (DRM) for any seismic load application. That method is the only one that is actually dynamically consistent (it is analytic). It is also available through PlasticBowl command in current version of OpenSees. You can take a look at my lecture note:
http://sokocalo.engr.ucdavis.edu/~jerem ... es_2up.pdf
(see chapter 9 for theory and then see apendix for more details on command...
Boris
You just connect the nodes on the boundary for shear beam effects. However, I would strongly suggest looking into Domain Reduction Method (DRM) for any seismic load application. That method is the only one that is actually dynamically consistent (it is analytic). It is also available through PlasticBowl command in current version of OpenSees. You can take a look at my lecture note:
http://sokocalo.engr.ucdavis.edu/~jerem ... es_2up.pdf
(see chapter 9 for theory and then see apendix for more details on command...
Boris
