原子炉建屋立体耐震壁の復元力特性に関する研究 : (その2)M〜φ関係および荷重変形関係スケルトンカーブの検討

Abstract

This paper proposed load displacement relationship models for reinforced concrete shear walls of nuclear reactor buildings based on the results obtained from load tests using reduced scale model tests. Establishing a feasible earthquake-resistant design to withstand large earthquake is very important, especially in Japan. It is necessary, therefore, to determine the elastic and plastic range characteristics of reactor buildings. The relationships between lateral load and lateral displacement are idealized with loops and envelope curves which envelope apises of loops. Lateral displacement consists of shear and flexural displacement. In the case of reduced scale models, flexural displacement consists of rotational displacement at the base. Shear displacement is obtained from the relationship between shear stress r and shear strain γ, the flexural displacement from the relationship between moment M and curvature φ and the rotational displacement from the relationship between base moment M_B and rotational angle φ using the beam theory. Equations for calculating the τ〜γ envelope curves were proposed in Part 1, based on 34 reduced model tests and 18 numerical tests. After careful consideration of 33 reduced model tests in which shear and flexural displacement were measured, equations for caluculating M〜φ and M_B〜φ envelope curves were proposed. The computed envelope curves showed good agreement with experiments. Finally, experimental load displacement envelope curves were compared with calculated ones which were computed by the τ〜γ, M〜φ and M_B〜φ relationships. The computed envelope curves adequately trace 52 tests results.