Masonry Magazine April 1986 Page. 37
FIG. 6: A 17-story reinforced concrete frame building that was just completed but was not occupied, on the corner of Vertiz and Liceaga. It was an open frame with no shear walls.
FIG. 8: Collapsed Nuevo Leon building clearly shows chain reaction of the total collapse, starting with collapse of columns in the open area.
FIG. 7: Collapsed sections of the Nuevo Leon housing structure at Tlalcolco. Hundreds of people lost their lives in these buildings.
12) Building near the corner of Jesus Maria and Teresa De Meir. The top six floors of this 11-story building collapsed onto the fifth floor. The top floors were open concrete frames. On the right is a 15-story concrete frame building with infilled masonry walls. The building survived, and people could escape. The small building at the left lost its parapet as a result of "hammering" from the adjacent 11-story building.
FIG. 9: Seventh-floor column on standing section at Nuevo Leon. Note column failure due to high overturning forces that buckled bars and fractured steel column ties.
13) Part of the Juarez housing project ("Multifamiliar Centro Urbano Presidente Juarez"), located near the Centro Medico metro station. The northern portion of this 13-story structure collapsed beyond the construction joint. The collapse occurred after the first major aftershock on September 20. Fortunately the tenants were evacuated immediately after the initial shock on September 19. This quick action saved many lives.
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