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《混凝土结构设计规范》(GB 50010—2002)给出了沿截面腹部均匀配置纵向钢筋的钢筋混凝土构件偏心受压正截面承载力计算方法,《高层建筑混凝土结构技术规程》(JGJ 3—2002)在此基础上提出了简化的剪力墙偏心受压正截面承载力计算公式,但JGJ 3—2002、JGJ 3—2010在截面有效高度h_(w0)、小偏压情况下受拉区端部钢筋应力σ_s、相对界限受压区高度ξ_b、轴向压力作用点至受拉钢筋合力点距离e等参数取值存在一些问题,结合理论分析提出了相应的修正方法。算例分析表明,提出的修正方法计算得到的N_u-M_u相关曲线与GB 50010—2010、RESPONSE-2000计算结果吻合较好。
The Code for Design of Concrete Structures (GB 50010-2002) gives the calculation method for the bearing capacity of the normal cross-section of eccentric load of reinforced concrete members with longitudinal reinforcement uniformly arranged on the abdomen of the section, Technical Specification of High-rise Building Concrete Structure (JGJ 3-2002) On this basis, a simplified calculation formula of the bearing capacity of the eccentric cross-section of the shear wall is proposed. However, when the effective height of the cross-section h_ (w0) and the small bias are applied by JGJ 3-2002 and JGJ 3-2010, There are some problems on the parameters of steel bar stress σ_s, relative limit pressure zone height ξ_b, axial pressure point to the distance between the steel bar and the force point e, and the corresponding correction method is put forward based on theoretical analysis. The case study shows that the calculated N_u-M_u correlation curve calculated by the proposed correction method is in good agreement with the calculated results of GB 50010-2010 and RESPONSE-2000.