Contribuição da rigidez transversal à flexão das lajes na distribuição dos esforços em estruturas de edifícios de andares múltiplos, em teoria de segunda ordem / Contribution of bending stiffness transverse of slabs in the forces distribution in structures of multistory buildings, in second order theory

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

The main aim of this work is to calculate stresses and displacements of threedimensional structures of multistory buildings, subjected to vertical and lateral loads, considering the transverse bending stiffness of slabs, in second order theory. The plate finite element adopted in floor discretization, responsible for considering the bending stiffness contribution of slabs in the analysis of buildings, is the DKT (Discrete Kirchhoff Theory). For columns the forces equilibrium is verified for the columns in their deformed position, which is known in the technical literature as 2nd order analysis, considering the geometric non-linearity. The techniques of serial and parallel analysis of substructures are applied to the global stiffness matrix for the calculus of forces and displacements in the strucuture. A computer program was developed for the calculation process, using the computer language Fortran Power Station 90 and pre and post-processors in Visual Basic 4.0 for a Windows environment. Finally, some examples are presented to check the validity of the employed calculus process

ASSUNTO(S)

multistory buildings transverse stiffness of slabs rigidez transversal da laje teoria de segunda ordem second order edifícios andares múltiplos

ACESSO AO ARTIGO

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