Stability analysis for 3D frames using mixed corotational formulation
2010 (English)In: SDSS-Rio 2010 Stability and ductility of steel structures / [ed] E. Batista, P. Vellasco, L. de Lima, 2010, 547-554 p.Conference paper (Refereed)
The corotational technique is adopted for the analysis of 3D beams. The technique applies to atwo-noded element a coordinate system which continuously translates and rotates with the element. Inthis way, the rigid body motion is separated out from the deformational motion. Then, a mixedformulation is adopted for the derivation of the local element tangent stiffness matrix and nodal forces.The mixed finite element formulation is based on an incremental form of the two-field Hellinger-Reissnervariational principle to permit elasto-plastic material behavior. The proposed element can be used toanalyze the nonlinear buckling and postbuckling of 3D beams. The mixed formulation solution iscompared against the results obtained from a corotational displacement-based formulation having thesame beam kinematics. The superiority of the mixed formulation is clearly demonstrated.
Place, publisher, year, edition, pages
2010. 547-554 p.
IdentifiersURN: urn:nbn:se:kth:diva-72478ScopusID: 2-s2.0-84890253622OAI: oai:DiVA.org:kth-72478DiVA: diva2:487643
SDSS-Rio 2010 Stability and ductility of steel structures. Rio de Janeiro, Brazil. September 8 - 10, 2010
QC 201204252012-01-312012-01-312012-04-25Bibliographically approved