آزمایش ارتعاش محیط و شناسایی پویا یک ساختمان تاریخی. کلیسای چهارده کمک کننده مقدس (آلمان).

The preservation of the architectural heritage is a fundamental aspect in the cultural development of modern cities. This heritage has to be preserved and different technical analysis are usually necessary to ensure its proper preservation. Due to this fact, before performing these analyses, non-destructive techniques are usually an indispensable tool to provide information about the current structural behavior of the building. The use of ambient vibration tests is widespread as a technique to identify dynamic properties of historical constructions from a global point of view, but not to identify these dynamic properties of specific elements with a local character. In this paper, these techniques are used to characterize dynamically concrete parts of a historical building. These dynamic structural parameters identified by using the operational modal analysis method allows the adjustment of numerical models in order to obtain a more accurate estimation of the actual behavior of the structure. In this way, updated FE models can be used to assess the structural behavior of the historical building.In the present paper, the use of ambient vibration tests on the masonry roof of the Basilica of the Fourteen Holy Helpers is presented. This is a church located near the town of Bad Staffelstein near Bamberg, in Bavaria, southern Germany. The late Baroque-Rococo basilica, designed by Balthasar Neumann, was constructed between 1743 and 1772. It is dedicated to the Fourteen Holy Helpers, a group of saints venerated together in the Catholic Church, especially in Germany at the time of the Black Death.