Abstract
Collisions between adjacent buildings under long-period ground motion are becoming a grave issue in Japan. This seismic pounding phenomenon is said to be first observed in the 1985 Mexican earthquake; an apartment building called Nuevo Leon situated in the Tlatelolco district of Mexico City, which consisted of three similar buildings built consecutively with narrow expansion joints between the buildings, collapsed completely except one building remaining after the earthquake. In this chapter, a seismic pounding analysis is performed on a simulated model of the Nuevo Leon buildings to understand the impact and collapse behavior of structures built close to each other. It can be seen from the numerical results that the difference in the natural periods between the adjacent buildings caused by previous earthquakes may have triggered the collisions and the collapse.
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