Ambient vibrational characterization of the Nossa Senhora das Dores Church

Abstract

The present paper shows the vibrational characterization tests of a clay brick heritage construction from XIX century, the Nossa Senhora das Dores Church, placed in Sobral, Brazil. In this study the calibration of the 3D finite element numerical model of the church was performed through ambient vibrational testing using the first three natural frequencies identified. The obtained results, namely the natural frequencies identified, and the calibrated model intends to give a contribute for understanding of the structural behavior of the Brazilian heritage constructions, and introduces relevant information for be used for safety assessment of the church along the time.

Keywords:

• dynamic identification
• ambient vibration testing
• heritage construction
• FEA
• OMA

Additional information

Notes on contributors

Esequiel Mesquita

Esequiel MESQUITA was born in Iraucuba, Ceará, Brazil, on April 1989. In 2012 he received the bachelor degree in Civil Engineering by Universidade Estadual Vale do Acaraú and the PhD in Civil Engineering in 2017 from Faculty of Engineering of University of Porto, with doctoral fellowship from CAPES Foundation, Ministry of Education of Brazil. He has experience in materials characterization and durability of reinforced concrete structures, and he current research interests include structural health monitoring, optical sensors, structural risk assessment, structural safety maintenance, assessment, strengthening and repair of existing structures and built heritage conservation. Current he is the Head of Laboratory of Civil Engineering of Nuclei of Industrial Technology of Ceará State – NUTEC.

Francisco Brandão

Francisco BRANDÃO was born in Mucambo, Ceará, Brazil, on July 1992. In 2012 he received the Technical License in Electrotechnology by Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE) and the bachelor degree in Civil Engineering in 2017 from Universidade Estadual Vale do Acaraú. During the academic year 2014/2015 he studied at Politecnico di Torino with undergraduate fellowship from CAPES Foundation, Ministry of Education of Brazil. He has experience in numerical modeling of masonry structures, seismic analysis of heritage constructions and dynamic identification of structures.

Aldecira Diogenes

Aldecira DIOGENES received the bachelor degree in Civil Engineering by Universidade de Fortaleza in 2007, and the M.Sc. Degree in Civil Engineering in 2011 from Universidade Federal do Ceará. She is Assistant Professor at Universidade Estadual Vale do Acaráu, Brazil and PhD Student at Universidade Federal do Ceará. She has experience in materials characterization and structural analysis, and she current research interests include structural health monitoring, structural risk assessment, strengthening and repair of existing structures and built heritage conservation.

Paulo Antunes

Paulo ANTUNES was born in Mealhada, Portugal, on May 1977. He received a Physics Engineering degree in 2005, the M.Sc. in Applied Physics in 2007 and the PhD in Physics Engineering in 2011from the Universida de de Aveiro, Portugal. Currently he is working under a post-doctoral research fellowship from Fundacão para a Ciência e a Tecnologia in the Instituto de Telecomunicacões and in the Departamento de Física from the Universidade de Aveiro, Aveiro, Portugal. His current research interests include the study and simulation of fiber Bragg gratings, optical fiber sensors for static and dynamic measurements, data acquisition, and sensor net-works for structural monitoring.

Humberto Varum

Humberto VARUM was born in Salreu, Portugal, on October 1970. He is Full Professor in the Structures Division of the Civil Engineering Department at University of Porto, Portugal. He is engaged in large-scale experimental testing and nonlinear analytical modeling of structural systems. In his teaching, he has specialized in the seismic engineering, theory of structures, and conservation of structures. His current research interests include assessment, strengthening and repair of existing structures, structural testing and modeling, reliability of structures, earthquake engineering, and built heritage conservation.