架構拘束鉄筋コンクリート耐震壁の非線形解析法に関する試論

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In this paper, some attempts in nonlinear analysis of reinforced concrete shear wall-frame systems by the finite element procedure are presented and the applicability of the proposed methods is discussed using several examples of numerical computations on existing experimental test results. The introduced attempts in the analysis are as follows ; 1) The biaxial stresses of concrete is determined as a function of principal strain in a state of plane stress on the basis of the experimental data by Kupfer, Hilsdorf and Rusch (1). From the derived biaxial stress-strain relations, a solution of nonlinear equations of equilibrium in finite element analysis is obtained by employing a iteration method. 2) The concrete between cracks is still capable of carrying tensile stresses because of the bond between steel and concrete, so that the reinforcing bars are restrained by cracked concrete. By taking account of this restraint effect, the stiffness of the steel reinforcement in cracked zone of the concrete is changed according to the amount of the average steel strain. The proposed method of analysis appears to result in fairly good estimations of nonlinear load-deflection relations of shear wall-frame systems until the range of about 90% of their ultimate strength in comparison with the test results. However, in order to obtain better agreement between analyses and experiments, it should be necessary to make clear the physical conditions of stress transference and relative displacement along the cracks of concrete.
社団法人日本建築学会の論文
1978-02-28

架構拘束鉄筋コンクリート耐震壁の非線形解析法に関する試論

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