クランク型鉄筋コンクリート耐震壁の有限要素解析

概要

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The present paper investigates the nonlinear behavior of reinforced concrete shear walls with cranks based on a finite element analysis. The loading type is a horizontal cyclic one such as earthquake loads. Experiments of the shear walls with and without cranks, performed previously to see how the behavior changes depending on the crank and the ratio of reinforcing steel bars, are compared with the results obtained from the finite element analysis. The finite element analysis is based on an isoparametric degenerated shell formulation. The nonlinear constitutive equations for concrete are modeled adopting the formulation based on a concept of Ring Typed-Lattice Model. The experiments indicate that the shear walls with a crank have a low stiffness and a relatively low carrying capacity compared with an ordinary plane shear wall without crank and that they are more ductile. The ductile behavior of the walls with cranks is confirmed based on the finite element analysis. Moreover, a fine agreement between the experiments and analyses is obtained, accordingly, it is confirmed that the present numerical analysis scheme based on the Lattice Model is a powerful one to evaluate the behavior of reinforced concrete shear walls with cranks and without crank. Then, the effects of the reinforcing ratio on the strength of RC shear walls are also discussed.
一般社団法人日本建築学会の論文
2002-03-20