The simplicity, timeliness, and reliability of a post-earthquake assessment are fundamental for decision-makers in emergency management. An adequate risk assessment will help during the recovery and, therefore, increases the resilience of the community. Although within this context, the walk-down damage survey with the correct filling of evaluation forms and use of processing-data tools make possible a pertinent post-earthquake assessment, it is desirable to have measurable parameters that can complement the visual field evaluation with quantitative information. In some cases, basic quantitative measures, such as crack width, are not enough to make pertinent structural damage assessments. This article presents a fast and simple methodology to estimate the median maximum displacement and plastic energy demands on simple single-degree-of-freedom systems from the residual displacement they exhibit after being subjected to ground motions generated in the lakebed zone of Mexico City. Based on this, a discussion is offered on how a post-earthquake assessment can be improved by complementing the visual and measured information gathered on an existing structural system after an intense ground motion, with estimates of its maximum and cumulative plastic deformation demands derived from its residual deformation.

震后评估的简单性、及时性和可靠性是应急管理决策者的基础。充分的风险评估将有助于恢复期间，从而提高社区的复原力。虽然在这种情况下，正确填写评估表和使用处理数据工具的步行损害调查使相关的地震后评估成为可能，但希望有可测量的参数，可以用定量补充视野评估信息。在某些情况下，基本的定量测量（例如裂缝宽度）不足以进行相关的结构损坏评估。本文提出了一种快速而简单的方法，可根据简单单自由度系统在经受墨西哥城湖床区产生的地面运动后表现出的残余位移来估计它们的中值最大位移和塑性能量需求。在此基础上，讨论了如何通过补充在剧烈地面运动后在现有结构系统上收集的视觉和测量信息来改进震后评估，并估计其最大和累积塑性变形需求来自其残余变形。