Effects of Walls on the Seismic Behavior of Reinforced Concrete Structures

剪力墙的作用在设计偏心结构时，一般只考虑相对层间重心位移。检查了每个框架的相对层位移。我们分析了各种模型。即使用弹性刚度计算的偏心比相同水平，考虑重力偏心的模型比考虑刚度偏心的模型也要注意，因为前者受扭矩的影响更大。即使与弹性刚度计算的偏心比相同，该系数也随着墙体数量的增加而增加，从而增加了楼层的强度。它需要系数，增加每一个框架和每一层的强度，考虑到每一个结构。翼墙的影响1)翼墙对柱抗弯强度的影响分析结果表明，带翼墙柱的弯矩与轴向力的关系与矩形截面柱的不同。现有的带翼墙柱抗弯强度计算公式与解析值不一致。新的抗弯强度公式计算值与试验和分析值吻合较好。2)翼墙对柱抗剪强度的影响在有翼墙的柱中进行了试验，研究了配筋对柱抗剪破坏和强度的影响。提出了考虑剪切破坏模式的抗剪强度公式。在此公式中，考虑了钢筋和轴力对混凝土抗压强度的影响。在发生滑剪破坏的情况下，v减小。计算值与试验值吻合较好。

EFFECT OF SHEAR WALLGenerally, only the relative story displacements of the center of gravity are examined, in the case to design the structure with eccentricity. The relative story displacements of every frame are examined. We analyze the various models. The attention is necessary for the model with eccentricity by the gravity than the model with eccentricity by the stiffness, even if the ratio of eccentricity calculated with elastic stiffness is same level, because the model of the former is influenced in torsional moment more. The coefficient, which increases strength of the story, is increased as the quantity of wall is increased, even if the ratio of eccentricity calculated with elastic stiffness is same level. It needs that the coefficient, which increases strength of each frame and each story, are considered every structure.EFECT OF WING WALL1)The influence of the wing walls on the flexure strength of the columnsThe analytical results showed that the relationship between the moment and the axial force of the columns with wing walls is different from that of the rectangular cross-section. The flexure strength calculated by the existing conventional equations for columns with wing walls dose not accord with the analytical value of that. The calculated value by the new flexure strength formula in this study has good accordance with the test and analytical value.2) The influence of the wing walls on the shear strength of the columnsThe experiment in the column with wing walls and investigated the effect of the reinforcement bars on the -shear failure and strength. We presented a new shear strength formula considering shear failure modes. In this formula, the effective factor of compressive strength of concrete is taken account of the effect of the reinforcement bars and an axial force. In the case the sliding shear failure occurred, v is reduced. The calculated value by that has good accordance with the test values.