ABSTRACT

The paper deals with the seismic investigation of two masonry churches, namely Visitazione and San Giuliano, which are located in Poggio Picenze, a small town about 10 km far from L’Aquila. The seismic response assessment of the churches, which were damaged by the severe seismic event occurred in Italy on 2009 April 6^th, has been performed by means of experimental dynamic tests and numerical analyses.

Firstly, an experimental campaign based on Ambient Vibration Tests (AVTs), which are non-destructive tests especially applied to historical and monumental buildings for evaluating their modal response, has been carried out on the selected constructions in the framework of a cooperation activity between the Ss. Cyril and Methodius University of Skopje and the University of Naples “Federico II”. Such an experimental activity has allowed to obtain the dynamic properties of the examined structures, namely natural frequencies, vibration mode shapes and damping coefficients. The experimental results have been subsequently used to implement a numerical FEM model of the churches in the ABAQUS non-linear analysis software environment. Dynamic linear FEM analyses have been conducted in order to calibrate the experimental results in order to simulate as well as possible the real structural behaviour of inspected churches. Finally, the performed analyses have been of a fundamental importance for both detecting damages into the constructions and programming effective retrofitting interventions.

抽象的

本文涉及两个砖石教堂的地震调查，这两个砖瓦教堂分别位于距离拉奎拉（L'Aquila）约10公里的小镇Poggio Picenze中的Visitazione和San Giuliano。通过动态实验和数值分析，对2009年4月6^日在意大利发生的严重地震事件造成破坏的教堂进行了地震反应评估。

首先，在建筑与建筑之间的合作活动框架内，对选定的建筑进行了基于环境振动试验（AVT）的实验活动，该试验是非破坏性试验，尤其适用于历史建筑和纪念性建筑，以评估其模态响应。 Ss。西里尔和Methodius斯科普里大学和那不勒斯大学“ Federico II”。这样的实验活动允许获得所检查结构的动态特性，即固有频率，振动模式形状和阻尼系数。实验结果随后被用于在ABAQUS非线性分析软件环境中实现教堂的数值有限元模型。为了校准实验结果，已经进行了动态线性有限元分析，以便尽可能地模拟被检查教堂的真实结构行为。最后，进行的分析对于检测建筑物的损坏和对有效的改造措施进行编程都具有根本的重要性。