Ba. Izzuddin et Dl. Smith, Efficient nonlinear analysis of elasto-plastic 3D R/C frames using adaptive techniques, COMPUT STRU, 78(4), 2000, pp. 549-573
This paper presents a new nonlinear analysis method for three-dimensional r
einforced concrete (R/C) frames employing adaptive analysis concepts. The f
irst two components of the proposed adaptive method, namely the elastic and
elasto-plastic beam-column formulations, are described. The details of aut
omatic mesh refinement, which is the third component of the adaptive method
, are then presented. These include the construction of an effective intera
ction surface representing generalised stress states at the elastic limit,
the determination and checking of generalised stresses for exceeding the el
astic limit along an elastic element, and the refinement of an elastic elem
ent into an appropriate number of elastic and elasto-plastic elements. Exam
ples are finally presented to illustrate the accuracy and efficiency of the
proposed analysis method. (C) 2000 Elsevier Science Ltd. All rights reserv
ed.