Description

The work reflects on the damages in buildings displaced in the lake area of Mexico City, caused by the earthquakes of July 28, 1957 and September 19, 1985. The structural design of the buildings and the lack of knowledge of the dynamic properties of the soil were the main causes of its poor structural behavior. From the earthquakes, the Mexican specialists in this area began to analyze the structural failures to determine the causes that originated them. With the subsequent updates of the Construction Regulations of the Federal District and the Complementary Technical Standards of Design, the classification of the type of structures and the seismic coefficients applied to the structural design was changed, and the Complementary Technical Standards are updated to modify the criteria and parameters of seismic design.