Tarihi yığma bir yapıda uygulanan güçlendirmenin deprem performansına etkisinin sayısal yöntemle incelenmesi

Earthquake effects have been always a great challenge for the structures, specially heritage ones. Historical masonry structures were constructed based on the self-weight loading and consequently have high compressive strength. On the contrary, masonry material is vulnerable against any seismic actions due to its quasi-brittle behaviour. These complex structures require special care and multidisciplinary approach while performing seismic assessment. In the present thesis, a case study of historical Kütahya Kurşunlu Mosque was conducted. Firstly, site investigations were carried out to identify the structural condition and severe damage on the mosque was reported. Therefore, the historical masonry mosque has undergone several interventions and retrofitting actions in order to improve the seismic performance and structural integrity. The main objective of the thesis is to study the effectiveness of the seismic retrofitting on the mosque by using finite element method. Two representative structural schemes, non-retrofitted and retrofitted, were generated as three-dimensional finite element model. Ambient Vibration Measurements and Operational Modal Analysis was performed in order to characterize the dynamic properties of the mosque. Thus, the finite element models were calibrated according to the experimental modal analysis. In order to evaluate the seismic behaviour of the mosque, nonlinear pushover and dynamic analyses were performed. Finally, seismic response of the two models were studied in terms of peak displacements, absolute accelerations and damage patterns. A positive contribution of the retrofitting to the structural behaviour was observed. The numerical damage pattern allowed to validate the adopted nonlinear behaviour of the structure by comparing with the real damage.