Sl. Di et Yk. Cheung, NONLINEAR-ANALYSIS OF RC SHELL STRUCTURES USING LAMINATED ELEMENT .2., Journal of structural engineering, 119(7), 1993, pp. 2074-2094
Citations number
18
Categorie Soggetti
Engineering, Civil","Construcion & Building Technology
An incremental variational formulation and a curved-shell element were
proposed in the companion paper. In this part, the material model and
solution techniques are discussed in detail. The strain-hardening pla
stic approach is employed to model the compressive behavior of the con
crete. A dual criterion is considered for yielding and crushing in ter
ms of stresses and strains, which is completed with a tension cut-off
representation. Both the crack interface effects and dowel action are
accounted for by using an average shear modulus, and a full bond is as
sumed at the steel-concrete interface. A total Lagrangian approach mak
ing use of the second Piola-Kirchhoff stress tensor is employed in thi
s analysis. An incremental and iterative modified Newton-Raphson schem
e is used for the solution of nonlinear problem. An energy criterion i
n terms of both forces and displacements is implemented. The applicabi
lity and validity of this analytical model incorporating both geometri
cal and material nonlinearities is amply demonstrated through several
numerical examples. The solution technique proposed in this paper has
been shown to be successful in preventing the drifting of the solution
in incremental process.