Browsing by Author "Ferreira, Tiago Miguel"
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- Nonlinear dynamic analysis for safety assessment of heritage buildings: church of Santa Maria de BelémPublication . Roque, João; Oliveira, Daniel V.; Ferreira, Tiago Miguel; Lourenço, Paulo B.Despite the remarkable longevity of heritage constructions, they typically present several structural fragilities inherent to their own material and constructive features. This fact is particularly relevant when seismic loads are concerned, because a very significant portion of such constructions lack adequate seismic resistance and require retrofitting interventions in order to mitigate their vulnerability. However, to guarantee the success of the interventions, the interventions should be carefully selected based on a full understanding of the dynamic response of the building and, particularly, its most vulnerable structural elements. Due to many reasons, the issues associated with this kind of analysis are still difficult to address; therefore, research on this subject should be encouraged. Taking this into account, the church of Santa Maria de Belém, one of the most emblematic buildings of the monastery of Jer´onimos complex in Lisbon, is used in this work as a case study to discuss the nonlinear dynamic response of cultural heritage buildings. The nonlinear dynamic behavior of the church was numerically simulated with a three-dimensional (3D) model using artificially generated seismic acceleration time histories, in agreement with seismic hazard scenarios for return periods of 475, 975, and 5,000 years. The dynamic response of the church is discussed and a comparison against results derived from a pushover analysis is also presented. Finally, a modal analysis is presented, estimating the damage level that would be present in the church after the occurrence of such seismic scenarios.
- The INHAVIT project: sustainability-led approaches for the rehabilitation of the cultural built heritage of Montesinho Natural Park: research overview and initial findingsPublication . Ortega, Javier; Vasconcelos, Graça; Ferreira, Tiago Miguel; Rodrigues, Hugo; Luso, Eduarda; Arias, Juan; Graus, Sandra; Khei, Soon; Silva, Dener; Conde, OtavioThe INHAVIT research project, funded by the Portuguese Foundation of Science and Technology (FCT), aims to study and identify the social, economic and environmental vulnerabilities that may be contributing to the current state of progressive abandonment of the rural villages of Montesinho Natural Park (MNP), in Portugal. Once the vulnerabilities are better understood, the main research question is whether the conservation and retrofitting of the rural built heritage in MNP can help reduce these vulnerabilities and how. The present paper intends to show the structure of the research project, focusing on the research methodology and specific tasks designed to tackle the project objectives. It also presents the preliminary results obtained from the first two field survey missions carried out at the MNP whose primary purpose was getting a screening of the park’s current state regarding the loss of authenticity of its vernacular heritage.