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本文给出了在设计地震荷载下达到给定极限状态的结构抗震设计的基本思路，该思路不同于现行的基于作用力设计法（ｆｏｒｃｅ－ｂａｓｅｄ ｄｅｓｉｇｎ）的原理，即以加速度反应谱、规范给出的性能系数（力降低系数）和位移验算为依据的设计原理，其中性能系数与潜在损伤几乎没有什么关系，而位移验算是为了保证不超过非结构层间变位界限，但出处不明。本文提出的方法是以设计位移谱和用最大反应下的当量割线刚度反映的结构特征为依据的，并用当量粘滞阻尼来体现滞回耗能，在发展基于位移的设计法（ｄｉｓｐｌａｃｅｍｅｎｔｂａｓｅｄｄｅｓｉｇｎ）的过程中表明，在目前基于作用力的设计通常采用的关于钢筋混凝土结构构件刚度的假定是不合适的，它将导致在结构自振周期计算和位移计算中的显著误差。
In this paper, the basic idea of seismic design for a given limit state under design seismic load is given. This idea is different from the current principle of force-based design, ie, the acceleration response spectrum and the specification The design principle of the coefficient of performance (force reduction factor) and displacement checking calculation is based on which the performance coefficient has little to do with the potential damage, and the displacement checking is performed to ensure that the boundary of non-structural layer displacement is not exceeded, but the source is unknown. The method proposed in this paper is based on designing the displacement spectrum and the structure characteristics reflected by the equivalent secant stiffness under maximum response. Equivalent viscous damping is used to represent the hysteretic energy consumption, and the displacement-based design method (displacement-based design) is developed. The process shows that the current assumptions based on the force-based design are generally inappropriate for the stiffness of reinforced concrete structural members, which will lead to significant errors in the calculation of the natural vibration period of the structure and displacement calculations.