2006 Volume 13 Issue 51 Pages 29-38
This paper presents an efficient computer method for elastoplastic large deflection analysis of flexibly jointed single-layer lattice domes. A plastic hinge type formulation is employed combining the?emodified incremental stiffness method, the updated Lagrangian formulation and numerical integration about the end sections of the element. The behavior of the semi-rigid joint is modeled as the element-end compliance. The element is a general use beam element. Although the method requires a fourelement approximation for a member in the analysis of portal frames, the method gives a good result by one-element approximation for a member in the analysis of single-layer lattice domes. The above mentioned idea of the element-end compliance can be used for obtaining the corresponding semi-rigid elements from existing rigid elements.