The 19 September 2017 Puebla–Morelos earthquake provides a unique opportunity to (a) study the effectiveness of seismic rehabilitation methods implemented in Mexico City after 1985 and (b) collect large amounts of data on current building rehabilitation practices. This article presents and discusses seismic rehabilitation efforts conducted on concrete buildings after the 1985 and 2017 earthquakes. Building damage and vulnerabilities, code provisions for rehabilitation, and common repair and retrofit techniques used in these two periods of time are summarized. The performance of four buildings rehabilitated after 1985 is examined based on results from field investigations conducted after the 2017 event. These rehabilitations were effective in improving the performance of these buildings according to observed damages and estimated shaking intensities. To allow a more systematic assessment of seismic rehabilitations in future earthquakes, an inventory of rehabilitated buildings in Mexico City is currently under development. Preliminary data obtained from this inventory effort are presented and discussed.

中文翻译：

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1985 年和 2017 年墨西哥城地震后混凝土建筑的抗震修复

2017 年 9 月 19 日的普埃布拉-莫雷洛斯地震为 (a) 研究 1985 年后墨西哥城实施的地震修复方法的有效性和 (b) 收集有关当前建筑修复实践的大量数据提供了独特的机会。本文介绍并讨论了 1985 年和 2017 年地震后对混凝土建筑物进行的抗震修复工作。总结了这两个时期使用的建筑物损坏和脆弱性、修复的代码规定以及常见的维修和改造技术。根据 2017 年事件后进行的实地调查结果，对 1985 年之后修复的四座建筑物的性能进行了检查。根据观察到的损坏和估计的震动强度，这些修复有效地提高了这些建筑物的性能。为了在未来的地震中对地震修复进行更系统的评估，目前正在编制墨西哥城修复建筑的清单。介绍并讨论了从该清单工作中获得的初步数据。