Examinando por Autor "Aguilar, Rafael"
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- PublicaciónSólo datosPreliminary structural diagnosis of the Sacsamarca church in Peru using photogrammetry and IR thermography(Springer, Cham, 2019) Briceño Melendez, Carolina; Gonzales, Mauricio; Yaya, Carlos; Moreira, Susana; Aguilar, RafaelThe application of different diagnostic techniques in a historical construction allows the obtained information to complement each other, which contributes to a detailed and complete data of the conservation state of a building. This paper provides a structural diagnosis of the church “Virgen de la Asunción” of Sacsamarca village in Ayacucho, Peru. Due to exposure to weathering, torrential rains, and past seismic activity, the Sacsamarca church has a poor conservation state. Hence, it is necessary to identify properly the structural pathologies and their extension in the church. A first part of the research was the development of a three-dimensional geometrical model using aerial and terrestrial photogrammetry, aiming to characterize the general damage state of the building, including inaccessible zones. The data generated from the aerial and terrestrial acquisition allowed a detailed identification of the pathologies on the façades. A photographic record was used to detect the anomalies in the interior of the church. Finally, a passive thermography campaign was carried out in order to find additional damage and corroborate the pathologies identified during the visual inspection. The structural diagnosis evidenced that the southern and western wall of the church of Sacsamarca present a high collapse risk, for which emergency actions for their stabilization are recommended.
- PublicaciónSólo datosSeismic assessment of the church of San Sebastian in Cusco, Peru by means of pushover nonlinear analysis(Springer, Cham, 2019) Noel Tapia, María Fernanda; Briceño Melendez, Carolina; Moreira, Susana T.; Aguilar, RafaelThe present paper seeks to evaluate the seismic performance of the San Sebastian church and its vulnerability to seismic events. This colonial temple dates back to the 16th century and is located in Cusco, Perú. The church stands out for being one of the first five Andean temples erected in the city of Cusco and also for being one of the most outstanding expressions of baroque art. Due to its artistic and cultural value, this church was declared National Cultural Heritage in 1972. Unfortunately, the periodic occurrence of seismic events and a fateful fire occurred in 2016 have endangered the survival of the structure and the safety of visitors. Aiming to evaluate the current situation of the church, this research developed a pathological identification through visual inspection and IR thermography as a non-destructive technique. A numerical analysis was also performed by means of a nonlinear pushover analysis that allowed estimating the evolution of the damage and the capacity of the structure in a seismic event. The results of the analysis showed that the main failure mechanisms of the structure would be the decoupling of the church front portion (towers and choir), generating concentrated damage in the arches that support the choir, as well as longitudinal cracks in the nave walls. The seismic capacity related to these failures is around 0.20 g, which is much lower than the recommended demand from the Peruvian code for the region of Cusco – 0.25 g – meaning that the church is highly vulnerable to seismic loads.
- PublicaciónSólo datosSeismic vulnerability assessment of a 17th century adobe church in the Peruvian Andes(Taylor & Francis, 2019-01) Briceño Melendez, Carolina; Moreira, Susana; Noel, Maria F.; Gonzales, Mauricio; Vila-Chã, Eduarda; Aguilar, RafaelA large part of Peruvian heritage corresponds to Colonial Andean churches, which are economically and culturally essential for the development of several villages. Particularly, adobe churches are very vulnerable to earthquakes due to the brittle material behavior, the weak connections, and the absence of a rigid diaphragm. This article aims at performing the seismic vulnerability assessment of an adobe heritage church: “Virgen de la Asuncion” of Sacsamarca located in the province of Ayacucho in the Andean region of Peru; using a rapid screening method and a more complex numerical analysis. First, the damage survey was carried out through visual inspection and infrared thermography, while the material characterization was performed by applying flat-jack tests. Later, the seismic vulnerability assessment was carried out in two stages. The first was based on simplified criteria for masonry structures, and the other on a pushover analysis of global performance. From this evaluation, it was possible to conclude that the church is indeed vulnerable to Peruvian seismic demands.