Aleppo, one of the oldest inhabited world heritage cities in the world, was struck by a destructive earthquake on February 06, 2023. Its iconic citadel built on a historical hill and surrounded by a protective moat, was severely damaged. However, the main entrance tower and the massive arched masonry bridge composed of an inclined deck and a series of unequal pillars height, constructed over the moat, survived the earthquake with minor apparent damages. In the light of a damage identification purpose, characterization of dynamic properties, and a health monitoring plan, an experimental dynamic identification campaignwas conducted on the historic structure, and sonic testingwas undertaken on the bridge pillars. The in-plan and out-of-plan mode shapes were clearly identified under ambient vibrations, in addition to the monument's natural frequencies. The dynamic parameters were estimated via the commercial software ARTeMIS using the EFDD method. Knowing that no data was available on the foundations and the soil conditions, the in-plane deformation modes provided qualitative information about the soil stiffness under the main pillars. Additionally, it was possible to correlate the damage state of the tower to a certain number of bending and torsional modes. The experimental results allowed the calibration of a numerical modal analysis elaborated on a 3D FE model, for a better assessment of the seismic capacity of the monument. The obtained dynamic parameters are to be compared to the monument response during and after a future structural rehabilitation for efficient monitoring of the structural intervention.

来源平台：PROCEEDINGS OF THE 10TH INTERNATIONAL OPERATIONAL MODAL ANALYSIS CONFERENCE, VOL 1, IOMAC 2024