Identification of Historical Veziragasi Aqueduct Using the Operational Modal Analysis

Abstract

This paper describes the results of a model updating study conducted on a historical aqueduct, called Veziragasi, in Turkey. The output-only modal identification results obtained from ambient vibration measurements of the structure were used to update a finite element model of the structure. For the purposes of developing a solid model of the structure, the dimensions of the structure, defects, and material degradations in the structure were determined in detail by making a measurement survey. For evaluation of the material properties of the structure, nondestructive and destructive testing methods were applied. The modal analysis of the structure was calculated by FEM. Then, a nondestructive dynamic test as well as operational modal analysis was carried out and dynamic properties were extracted. The natural frequencies and corresponding mode shapes were determined from both theoretical and experimental modal analyses and compared with each other. A good harmony was attained between mode shapes, but there were some differences between natural frequencies. The sources of the differences were introduced and the FEM model was updated by changing material parameters and boundary conditions. Finally, the real analytical model of the aqueduct was put forward and the results were discussed.

Application of a new methodology based on Eurocodes and finite element simulation to the assessment of a romanesque church

“…-7- Masonry density: kN/m 3 , according to bibliography (Baker [29] used a value of 23 kN/m ; Betti, 2012 [11] and Ercan [10] used a value of 21 kN/m 3 ; Giordano [6] used a value of 25 kN/m 3 ) for sandstone blocks and very thin bed joints of poor mortar between them.…”

“…In the experimental field, some authors have applied different techniques for the strength assessment of de masonry walls (Binda [8], Corradi [9]). Other authors apply experimental techniques for the structural integrity assessment (Ercan [10]).…”

“…Most of the published works are focused on the structural integrity after seismic effects (Betti [11], Castellazi [12], Corradi [13], de Luca [14], Kishi [7], Mallardo [15]) in order to evaluate firstly the damage induced by the earthquake, and then to study reinforcement solutions that allow recovering the stability and functionality if possible. Most of these works (Betti [11], Castellazi [12], Mallardo [15], Modena [16], Valluzzi [17]) deal with the study of huge monumental buildings like churches, cathedrals, aqueducts, etc., by using experimental techniques (Valluzzi [17]), computational models based on the finite element method (Betti [11], Castellazi [12], Modena [16], Valluzzi [17]), or a combination of both (Ercan [10]).…”

Operational Modal Analysis: A Tool for Assessing Changes on Structural Health State of Historical Constructions after Consolidation and Reinforcement Works—Jura Chapel (Jerez de la Frontera, Spain)

“…In the last decade, there have been many cases of ambient vibration test applications in historical buildings [2][3][4][5][6][7][8][9][10]. However, OMA applications for evaluating structural interventions in historical buildings are more limited: from 2011 to 2013, the control of the intervention carried out in the area of the Roman eatre of Cádiz (Spain) was done by means of ambient vibration tests [11]; in 2012, Osmancikli et al [12] studied the effects of the restoration of the belltower of Hagia Sophia Church in Trabzon (Turkey); likewise, in 2014, Çalık et al [13] presented the evaluation of the restoration process of the masonry vault of Küçük Fatih Mosque, also located in Trabzon.…”

Investigation of a historic masonry structure by numerical and operational modal analyses

“…For this reason, conservation and the structural safety assessment of historical structures have become an increasing concern. There are many studies concerning this topic in the literature including both analytical and experimental investigations of these structures (Ercan and Nuhoglu, ).…”