Browsing by Author "Quezada Zambrano, Rosa Angélica"

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Caracterización del patrimonio edificado del Centro Histórico de Cuenca-Ecuador
(Universidad Tecnológica Indoamérica, 2021) Quezada Zambrano, Rosa Angélica; Jiménez Pacheco, Juan Carlos; García Erazo, Hernán Alfredo
Characterisation of the built heritage of historic centres oriented to the assessment of its seismic vulnerability: the case of Cuenca, Ecuador
(2022) Jiménez Pacheco, Juan Carlos; Quezada Zambrano, Rosa Angélica; Calderón Brito, José Miguel; Ortega Guamán, Erika Gabriela; García Erazo, Hernán Alfredo
The city of Cuenca, located in southern Ecuador, has a high level of seismic hazard. Within the framework of the first stage of the seismic vulnerability project Seismic damage scenarios of the built heritage of the Historic Centre of Cuenca, the main objective of the present work was to establish a catalogue of adobe and brick buildings typical of the Historic Centre of Cuenca. In this sense, based on the assumption of three categories of plan area size for each of the two typologies, the variability of different dimensional and non-dimensional geometric parameters was studied (e.g. floor plan shape, aspect ratio, number of storeys, interstorey height, wall thickness, distribution of interior walls). This variability was explored in different ways; of particular interest may be the archival work with intervention records for the study of the distribution of interior walls. The catalogue of typical buildings was the result of the effort to capture the typicality (e.g. most frequent cases, mean values) of the geometric parameters considered.
Characterization of the building stock heritage oriented to studies of seismic vulnerability at urban scale: case study historic centre of Cuenca, Ecuador
(Universidad de Cantabria, 2020) García Erazo, Hernán Alfredo; Jiménez Pacheco, Juan Carlos; Quezada Zambrano, Rosa Angélica; Calderón Brito, José Miguel
Cuenca is a city located in southern Ecuador (the third in importance), whose Spanish foundation dates back to 1557. Declared, in 1999, a World Cultural Heritage city by UNESCO, largely due to the valuation of its Historic Centre. The city is categorized as high seismic threat, with PGA: 0.25g, according to the Ecuadorian Construction Standard (NEC, acronym in Spanish). The Austro Seismic Network, a research center attached to the University of Cuenca, carried out, in the late 2000s, the first (and only) seismic vulnerability study of the city. The damage scenarios obtained showed that the Historic Centre of Cuenca (CHC, acronym in Spanish), where the oldest non-reinforced masonry (MNR, acronym in Spanish) buildings in the city are concentrated, is the most vulnerable area. This study was based on a simulation of seismic behavior at territorial scale with simple 1D models. With this background, within the framework of a seismic vulnerability project for the CHC whose objective is the establishment of more reliable damage scenarios, this work considered the characterization of its building stock, in typological and geometric terms. The characterization was oriented towards the estimation of the damage by means of static non-linear pushover analysis on 3D models, assuming as a strategy the condensation of the typicality of the existing buildings in a family of buildings-prototypes (EPs, acronym in Spanish). Focused on two of the three existing sub-typologies: adobe and brick MNR buildings, the characterization strategy was developed in three sections: 1) chronological study of construction practices and technologies of construction materials, 2) identification of predominant uses, 3) study of geometric and architectural features. As a synthesis of such studies, a catalog of six buildings-prototypes was obtained, three for each sub-typology.
Macro-modeling of adobe piers for seismic analysis of adobe dwellings in Cuenca, Ecuador
(Springer Países Bajos, 2019) Quezada Zambrano, Rosa Angélica; Aguilar Alberca, Eddy Daniel; García Erazo, Hernán Alfredo
Ecuador lies on the eastern rim of the seismically active area known as the Pacific Ring of Fire. In 1999, Cuenca’s unique architecture and historical buildings were listed in the UNESCO World Heritage Trust sites; many of these dwellings are composed of adobe walls. The aim of this papers is to present the mechanical characteristics of adobe walls representative of Cuenca’s historical buildings and a equivalent frame model to approximate the strength and vulnerability of a historical building, the behavior of masonry is represented from a macro-model approach. The properties of units and piers are obtained from experimental tests performed in the laboratories of the University of Cuenca. The numerical procedure is based on a macro-element model that is capable of reproducing flexural-rocking and shear failure modes. The macro-element is capable of representing with only one element the behavior of a whole masonry panel. The numerical results of adobe piers are compared with those of experimental tests, showing similar values for the elastic and inelastic ranges with close approximation of maximum shear strength and type of failure. This comparison allowed to estimate the mechanical properties of the macro-element model, which were used to model a historical building, Seminario San Luis. Research in this area will contribute to the conservation of historical dwellings and for future retrofitting and strengthening.