ハイブリッド型応力法による鉄筋コンクリート造骨組の弾塑性崩壊解析

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The hybrid stress beam-column finite elements, which have been proposed by Dr. Kondoh and based on the assumed stress method, yield no discretizing errors in their elastic and elasto-plastic responses, under the employed beam-column theory, of the member, with any (distributions of axial and flexural rigidity, and stress-strain characteristics) and subjected to any (concentrated and distributed) loads. Then, this approach might be one of the most promising approach to trace and examine the inelastic and collapse behavior of framed structures. In this paper, simple and effective hybrid stress finite element formulation is developed for reinforced concrete (R.C.) framed structures. Based on the Timoshenko's beam-column theory considering the first order shear deformation, resultant stress-generalized strain relations of the R.C. beam-column section, which represent the well-known stiffness degrading characteristics of the R.C. member under the (axial forcing and bending) and their interaction, are formulated. According to the standard procedure shown in Ref.17), the hybrid stress method, wherein employed the Lagrange multiplier method for computational convenience, is unifiedly formulated for the given basic equations and R.C. plane beam-column element is derived. Several numerical tests are performed, and show that the present approach and element have excellent capacity to simulate simply and accurately the more complicate behavior of R.C. framed structures.
社団法人日本建築学会の論文
1998-06-30

ハイブリッド型応力法による鉄筋コンクリート造骨組の弾塑性崩壊解析

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