連層耐震壁を含む鉄骨鉄筋コンクリート部分架構の曲げ変形挙動

抄録

Elastic-plastic behavior of 3-stories steel reinforced concrete (SRC) frames with shear walls failing in flexure was investigated. Two specimens of the one-third of full scall were tested. Wall-reinforcements of TK 1 were uniformly reinforced by vertical and horizontal bars, and those of TK 2 were reinforced by diagonal braced bars. Axcil force, shear force and overturnning moment were loaded at the top of 3-stories. Wall-girders in shear walls did not provide. The ultimate loads, failure modes, hysteresis characteristics and degradation of flexural and shear rigidity were examined in detail. On the effective method of wall-reinforcements in shear walls, TK 2 was rich in earthquake resisting rather than TK 1 when shear strengths of both specimens were same. Because the diagonal braced bars restrained transverse extensions of shear walls and prevented to be developing shear deformation after diagonal tension cracks. The ductility factor of these structures could be expected to range from 6.2 to 8.9. The degradation factors of flexural and shear rigidity could be estimated by Eqs. (7) and (8). On ultimate flexural strength of shear walls, the analytical solutions obtained by the extended concept of adding component strengths of concrete, longitudinal reinforcements and steels were nearly equal to the experimental results.