13.架構付無開口壁の剪断抵抗に関する研究(第1報)

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In order to observe the strength and the behavior of reinforced concrete bracing walls under the action of lateral force, eleven specimens of almost full size were tested. Among the specimens, ten were bracing walls of reinforced concrete with different thickness and reinforcements and of concrete blocks, all of which were enclosed with the same reinforced concrete frame. Another was the specimen of the enclosing frame alone tested for comparison. Those specimens were placed under a 400,000 1bs testing machine and the compressive force was applied in a diagonal direction so that their behavior under shearing force could be observed without any disturbance due to bending. The scope of tests covered the determination and the comparison of (1) shearing rigidity, (2) load of crack appearance, (3) maximum load carrying capacity, (4) ultimate strength and (5) effect of reinforcement. The results of tests of all specimens disclosed that the relationship between shearing force and shearing deformation before the appearance of crack was approximately linear and they could be analyzed accurately enough by means of the theory of elasticity of homogeneous material. The crack due to diagonal tension in the bracing wall was found to appear when shearing unit stress at the wall center computed by the theory of elasticity reached one-tenth of the compressive strength of the concrete. It was concluded, further, that the ratio of decreased shearing rigidity after the appearance of crack to that before the appearance of crack could be represented by a certain function of the deformation alone, being dependent on neither the amount of reinforcement nor the relative rigidity of the wall to the rigidity of the enclosing frame. Concerning the behaviors of these bracing walls at and after the maximum load carrying capacity will be reported in the next issue of this Transaction.
社団法人日本建築学会の論文
1955-09-30

13.架構付無開口壁の剪断抵抗に関する研究(第1報)

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