高层钢筋混凝土剪力墙反应调整系数的分析

为明确高层钢筋混凝土剪力墙的抗震能力，采用反应调整系数量化现有规范中剪力墙的设计构造措施，推导并计算了独立矩形悬臂剪力墙的超强系数和延性系数，从而确定了各抗震等级剪力墙的反应调整系数，再与设防地震和多遇地震的地震动比值相比较．结果表明，抗震等级、形状比、轴压比和墙体长度是剪力墙抗震能力的主要影响因素；为保证剪力墙的抗震性能，应限制墙的形状比．文中还提出了各抗震等级剪力墙的形状比限值和相应的设计建议．

Analysis of Response Modification Factor of RC Shear Walls of Tall Buildings

The response modification factor is introduced to evaluate the seismic capacities of the reinforced concrete(RC) shear walls of tall buildings,and to quantitatively articulate the seismic fortification measures prescribed by the China codes.The overstrength and ductility factors of an independent rectangular cantilever shear wall are also analyzed and calculated.Thus,the response modification factors for the shear walls with different seismic grades are determined,which are then compared with the ground motion ratio of the moderate intensity earthquake to the frequently occurring earthquake.The results show that the seismic grade,the aspect ratio,the axial compression ratio and the wall length are the main variables affecting the seismic capacity,and that the aspect ratio should be limited to insure the seismic capacity.The limitation of aspect ratio and the corresponding design suggestions are finally proposed for the shear walls with different seismic grades.