Restoration effects on experimental dynamic characteristics of masonry stone minarets
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Masonry minarets are sensitive to wind and earthquake forces due to their slenderness and supporting structural system. They are restored in order to safely transfer to future generations. This paper investigates the restoration effects on the dynamic characteristics of masonry stone minarets using ambient vibrations tests. Three historical masonry stone minarets restored by the Regional Directorate of Foundation in Trabzon, Turkey are selected for this purpose. Restorations works such as re-pointing of joints, renewing spoiled stones, scraping cement-based plaster layer coating, rebuilding upper part wall of the minaret balcony, wall surface cleaning and renewing wooden cone were implemented in the selected three minarets. The experimental dynamic characteristics of the selected minarets before and after restoration are determined by Operational Modal Analyses Method using the ambient vibrations. The natural frequency, mode shapes and damping ratios obtained before and after restorations are compared with each other. It has been shown that the dynamic characteristics of the three minarets are positively and negatively affected depending on the restoration works.
KeywordsMasonry minaret Restoration Dynamic characteristics Operational modal analyses Ambient vibrations Damping ratio
This research was implemented by using the measurement system provided by the projects from TUBITAK and Karadeniz Technical University under Research Grant Nos. 106M038, 2005.112.001.1 and 2006.112.001.1, respectively. Many thanks to Trabzon Regional Directorate of Foundation and its valuable personnel for their supports and permissions.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights
This article does not contain any studies with human participants or animals performed by any of the authors.
- 1.Tuluk Öİ, Doğangün A, Livaoğlu R, Acar A (2006) Turkish minaret tradition in terms of architecture and structural system. Yapı Dünyası Dergisi 122:41–49 (in Turkish) Google Scholar
- 5.Bayraktar A, Sevim B, Altunışık AC, Türker T (2009) Analytical and operational modal analyses of Turkish style reinforced concrete minarets for structural identification. Soc Exp Mech Dyn Test Civ Eng Struct Ser 33(2):65–75Google Scholar
- 25.Çalık İ, Demirtaş B, Bayraktar A, Türker T (2012) Analytical and experimental methods used in investigating the structural safety of stone minarets: an example of the minaret of Muhittin mosque in Trabzon. Vakıflar Dergisi 38:121–140 (in Turkish) Google Scholar
- 30.Erdil B, Tapan M, Akkaya İ, Korkut F (2018) Effects of structural parameters on seismic behaviour of historical masonry minaret. Periodica Polytechnica Civ Eng 62(1):148–161Google Scholar
- 32.Bayraktar A, Çalık İ, Türker T (2013) Structural dynamic identification of a restorated historical masonry Sundura Mosque and its minaret using ambient vibrations. Vakıf Restorasyon Yıllığı 6:53–62 (in Turkish) Google Scholar
- 34.Mirtaheri M, Abbasi A, Salari N (2017) A seismic behavior and rehabilitation of the historic masonry minaret by experimental and numerical methods. Asian J Civ Eng 18(5):807–822Google Scholar
- 35.Batel M (2002) Operational modal analysis–another way of doing modal testing. Sound Vib 36(8):22–27Google Scholar
- 36.Web-1, http://www.svibs.com/OMA, 28.08.2018
- 37.Brincker R, Zhang L, Andersen P (2000) Modal identification from ambient responses using frequency domain decomposition. In: 18th international modal analysis conference, 4062, San Antonio, USA, vol 2, pp 625–630Google Scholar
- 38.Jacobsen NJ, Andersen P, Brincker R (2006) Using enhanced frequency domain decomposition as a robust technique to harmonic excitation in operational modal analysis. In: Proceedings of ISMA2006: international conference on noise and vibration engineering, September, Leuven, BelgiumGoogle Scholar
- 39.Peeters B (2000) System identification and damage detection in civil engineering. PhD thesis, K.U, Leuven, BelgiumGoogle Scholar
- 40.PULSE (2006) Analyzers and solutions. Release 11.2. Bruel and Kjaer, sound and vibration measurement A/S, DenmarkGoogle Scholar
- 41.OMA (2006) Operational modal analysis. Release 4.0, Structural Vibration Solution A/S, DenmarkGoogle Scholar
- 42.Çalık İ (2017) Identification of experimental dynamic characteristics of historical mosques and minarets and evaluation of restoration effects. PhD thesis, Karadeniz Technical University, Trabzon, Turkey (in Turkish) Google Scholar
- 43.Ataman M (2013) Project reports of historical rize Çayeli Hacıbaşı Mosque. Regional Directorate of Foundations, Trabzon, Turkey (in Turkish) Google Scholar
- 44.Eroğlu E (2007) Art history report of Hacı Kasım Mosque. Regional Directorate of Foundations, Trabzon, Turkey (in Turkish) Google Scholar
- 45.Özen H, Tuluk Öİ, Engin HE, Düzenli Hİ, Sümerkan MR, Tutkun M, Demirkaya FÜ, Keleş S (2010) Inventory of urban cultural heritage in Trabzon. In: Provincial directorate of culture and tourism, Trabzon, Turkey (in Turkish) Google Scholar