The conventional Incremental Dynamic Analysis (IDA) used to evaluate the seismic response of structures, involves a series of nonlinear dynamic analyses, which requires extensive computational time and effort. This technical note utilizes a computationally efficient method to estimate IDA curves using Strength Variation (SV) curves. The accuracy of the proposed method is verified through comparisons with results of finite element analysis for 20 story SAC Los Angeles model subjected to different earthquake records, considering the P-Delta effects. Results demonstrated a reasonable agreement between the IDA curves established using the proposed method with those obtained from the conventional approach. Consequently, a new methodology for Performance Based Design (PBD) of structures is introduced utilizing SV curves. It is shown that the proposed method for establishing the IDA curves could enhance the PBD process for structures.

用于评估结构地震响应的传统增量动力分析 (IDA) 涉及一系列非线性动力分析，需要大量的计算时间和精力。本技术说明利用计算效率高的方法使用强度变化 (SV) 曲线来估计 IDA 曲线。通过与20层SAC洛杉矶模型在不同地震记录下的有限元分析结果进行比较，验证了所提出方法的准确性，并考虑了P-Delta效应。结果表明，使用建议的方法建立的 IDA 曲线与从传统方法获得的曲线之间具有合理的一致性。因此，利用 SV 曲线引入了一种基于性能的设计 (PBD) 结构的新方法。