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The Saint Agustin Church, built in the 16th century in Morelia City, is composed of a single nave church and two-level cloister and it is in a region of high seismicity at the south part of Mexico. Currently, the church presents cracks in the main nave and in the monumental staircase of the cloister. This study reports the current damage state of this building and analyzes a simplified model to assess its seismic performance. A model of the temple and cloister was created with macro elements using the rigid element methodology and conducting nonlinear time history analysis on simplified models of significant portions of the church. The model was subjected to a suite of real accelerograms recorded during the September 19, 2017 earthquake (Mw 7.1) with epicenter in Morelos State in Mexico. The results agree satisfactorily with the current damage and cracking patterns observed in the building and a negligible effect was found when both horizontal and vertical components of the seismic records were simultaneously applied. It is concluded that simplified models are a suitable alternative to study this type of structures, even in the case of nave-cloister interaction during strong earthquakes, action that it is usually disregarded in numerical models.

Simplified Seismic Assessment of a 16th Century Church and Cloister in Morelia, Mexico