1985年墨西哥市地震在许多方面都是独特的。其地面运动在强度、规律性、频率组成和持续时间方面都是独特的。在历史上记录的地面运动中,还没有阻尼值为5%的加速度反应谱在2.0秒周期上的值高达1.17g的记录(峰值地面加速度为0.2g)。对墨西哥市的建筑造成很严重的灾害:210幢建筑倒坍,几千幢遭到破坏,几千人丧失生命。本报告介绍这次地震的特征,描述其地面运动,墨西哥市的典型后果,分析其统计资料,得出初步结论,并涉及建筑规范的规定和有关事项。 The earthquake in Mexico City in 1985 was unique in many ways. Its ground motion is unique in terms of strength, regularity, frequency composition and duration. In historically recorded ground motions, there is no record of acceleration response spectrum with a damping value of 5% in the 2.0-second period as high as 1.17g (peak ground acceleration is 0.2g). The construction of the city of Mexico caused a very serious disaster: 210 buildings collapsed, thousands of buildings were destroyed, and thousands lost their lives. This report describes the characteristics of the earthquake, describes its ground movements, the typical consequences of Mexico City, analyzes its statistical data, and draws preliminary conclusions concerning the provisions of the building codes and related issues.