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Experimental and Numerical Modal Identification of the Fossanova Gothic Cathedral

机译：Fossanova哥特式大教堂的实验和数值模态识别

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摘要

This paper focuses on the dynamic behaviour of the Fossanova cathedral (Latina, ITALY), which represents a magnificent example of pre-Gothic style church, whose structural typology is largely present in the Mediterranean area, especially in many Countries characterised by a High-Medium seismic hazard. In particular, within the European research project PROHITECH, aiming at investigating the seismic vulnerability of such a structural typology, experimental and numerical analyses have been carried out. Firstly, detailed investigations have been devoted to the identification of the geometry of the main constructional parts as well as of the mechanical features of the constituting materials of the cathedral. Then, both Ambient Vibration Tests (AVT) and Numerical Modal Identification analyses by Finite Element Method (FEM) have been applied, allowing the detection of the main dynamic features. Finally, a refined FEM model reproducing the dynamic behaviour of the cathedral by using scaled physical quantities according to the Buckingham theorem has been developed. In fact, the present study has to be intended as a preliminary activity devoted to se up a shaking table test on a reduced scale physical model of Fossanova cathedral, which will be shortly carried out at the IZIIS laboratory (Skopje, Macedonia).
机译：本文着重于Fossanova大教堂（意大利拉蒂纳）的动态行为，该大教堂代表了前哥特式教堂的宏伟实例，其教堂结构类型主要出现在地中海地区，尤其是在许多以中高级为特征的国家中地震危险。特别是在欧洲研究项目PROHITECH中，旨在调查这种结构类型的地震脆弱性，已经进行了实验和数值分析。首先，已经进行了详细的研究，以识别主要建筑部件的几何形状以及大教堂组成材料的机械特征。然后，已经应用了环境振动测试（AVT）和通过有限元方法（FEM）进行的数值模态识别分析，从而可以检测主要的动态特征。最后，根据白金汉定理，通过使用缩放的物理量，复制了大教堂动态行为的精炼有限元模型已经开发出来。实际上，本研究必须作为一项初步活动，专门用于在缩小的Fossanova大教堂物理模型上进行振动台测试，该测试将很快在IZIIS实验室（马其顿斯科普里）进行。

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