MARQUES, RUI1; IVANCIC, SARILYN2; BRICEÑO, CAROLINA3; AGUILAR, RAFAEL4; PERUCCHIO, RENATO5; VARGAS, JULIO6

1) Postdoctoral Researcher, Pontifical Catholic University of Peru, Department of Engineering, marquesmnc@sapo.pt

2) Ph.D. Student, University of Rochester, Department of Mechanical Engineering, sarilyn.swayngim@rochester.edu

3) Master Student, Pontifical Catholic University of Peru, Department of Engineering, a20084720@pucp.pe

4) Associate Professor, Pontifical Catholic University of Peru, Department of Engineering, raguilar@pucp.pe

5) Professor, University of Rochester, Department of Mechanical Engineering, rlp@me.rochester.edu

6) Professor, Pontifical Catholic University of Peru, Department of Engineering, jhvargas@pucp.edu.pe

The church of Andahuaylillas in Cusco is an emblematic example of a large number of adobe churches in Peru. The investigation of the seismic behaviour of these constructions has received almost no attention, even if they are placed in high seismicity zones. This paper presents a study on the seismic behaviour of the Andahuaylillas church, which is based on in-situ operational modal analysis tests and subsequent numerical and analytical tasks. Finite element models of the church have been developed and calibrated through sensitivity analysis to material and structural variables, to approximate experimental frequencies and mode shapes. A nonlinear model has also been considered for pushover analysis, which allows evaluating the overall response of the church in damage and deformation. Analytical results denote poor connection between structural parts of the building, aspect that is confirmed with onsite inspection. The church presents high vulnerability to seismic actions and needs intervention to improve structural aspects and provide some box behaviour.

Keywords: Adobe churches, operational modal analysis, model calibration, pushover analysis, seismic retrofit