Three weeks after the 2017 Puebla Earthquake, the Applied Technology Council (ATC) deployed a multidisciplinary team to Mexico City to complete post-earthquake reconnaissance. This international team included structural and geotechnical engineers, instrumentation experts, researchers, and seismology specialists. The objective of the reconnaissance was to collect detailed information of concrete buildings, from structural drawings, damage observations, and instrumentation data, to site characteristics and ground motion records. The observations would serve to increase the data of concrete building seismic performance and aid the development of ongoing ATC projects. The ATC team observed a total of 70 buildings in Mexico City. Five of the buildings were instrumented, drawings were obtained for 9 buildings, and ground motion data at the recording stations near building sites was received and compiled.
The data is presented in a GIS framework that correlates soil properties, building periods, and structural damage observed from the earthquake. The presentation will cover overall trends observed in the GIS data maps and discuss implications of the findings for future design practices.
The ATC team also observed the behavior and contribution of stiff nonstructural elements in many buildings. In buildings with vertical and in-plane irregularities, the stiff nonstructural elements participated in the lateral system and may have prevented more severe damage to the structural elements. Specific examples and implications will be discussed.