Preliminary seismic analysis and strengthening proposals of two churches in Azores

• Type: Article in International Conference Proceedings Book
• Date: 2005

Authors

Aníbal Costa (Author) FEUP; António Arêde (Author) FEUP; Domingos Moreira (Author) FEUP; Nuno Neves (Author) FEUP

Conference proceedings International

Title: Proceedings of the 1st US-Portugal International Workshop – Grand Challenges in earthquake engineering 250 years after the 1755 Lisbon Earthquake

1st US-Portugal International Workshop – Grand Challenges in earthquake engineering 250 years after the 1755 Lisbon Earthquake

Lamego, Portugal

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

Abstract (EN): This paper covers the seismic behaviour modelling and numeric analysis of two church structures on Pico Island, Azores, affected by the Faial earthquake on 9 July 1998. The observed damages are first described and some modelling options for the analysis are discussed, particularly in what concerns the way of including the roof as a means of bracing the bearing walls. Frequencies and vibration modes are analysed and discussed for the different types of modelling. Seismic calculations are performed considering the actually recorded accelerograms of that earthquake, and the obtained results are compared with the really observed structural damages, in order to propose suitable strengthening techniques based on a better understanding of structural aspects most directly responsible for the damages. In this context, analysis and discussion are included concerning the influence of modelling type on the peak principal stresses and their zones of occurrence. By comparing those results with the actual damages, it is possible to assess the realism of the modelling hypotheses and then infer which one is most suitable. Based on those conclusions, some strategies are proposed to rehabilitate and strengthen the two churches¿ structures.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17