Assessment of the Seismic Vulnerability of a Masonry Bell Tower by Non-destructive Experimental Techniques
Assessment of the Seismic Vulnerability of a Masonry Bell Tower by Non-destructive Experimental Techniques
复制标题
砌体钟楼地震易损性无损试验技术评估
DOI：
10.1007/978-3-319-16130-3_17
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发表时间：
2015
影响因子：
6.4
通讯作者：
G. Marano
中科院分区：
文献类型：
--
作者：
D. Colapietro;A. Fiore;M. D. Fino;A. Netti;F. Fatiguso;G. Marano
意大利最近的地震事件的经验指出，有必要深入了解的行为，破坏机制和固有的脆弱性的纪念性建筑。历史建筑和纪念性建筑的特点是固有的脆弱性，地震作用，由于大多数情况下，他们不是根据基本的抗震规则设计的。此外，对于古老的砖石建筑来说，可靠的结构分析是确定具体而非侵入性改造措施的基础。在这个框架中，塔楼是非常有趣的案例研究，因为它们对水平作用的高度脆弱性和它们特有的类型学特征。介绍了意大利南部普利亚地区一座独特的砖石结构塔楼--瓦伦扎诺市圣卢卡圣玛利亚钟楼的振动测量、结构识别和地震危险性评估。评估程序包括：历史和形态学知识;非破坏性诊断调查;全尺寸环境振动测试;环境振动测量的结构识别;有限元建模;非线性动态分析。分析表明，可靠的有限元模型的重要性，以确定潜在的倒塌机制的纪念碑和那些危险的结构弱点，深刻影响地震脆弱性。在这个目标，它出现了一个适当的组合的动态识别技术和非破坏性的诊断调查的有效性。
The recent experiences of Italian seismic events have pointed out the necessity of a deep knowledge of the behavior, the damage mechanisms and the intrinsic vulnerability of monumental buildings. Historical and monumental constructions are characterized by an inherent vulnerability to seismic action, due to the circumstance that most of them were not designed according to basic seismic rules. Moreover, for old masonry monuments, reliable structural analyses are fundamental in order to identify specific and not invasive retrofitting interventions. In this framework towers are very interesting case-studies due to their high vulnerability to horizontal actions and to their peculiar typological characteristics. This paper deals with the vibration measurement, the structural identification and the seismic risk assessment of a unique masonry tower in Apulia region in Southern Italy: the bell tower of “Santa Maria di San Luca” in the city of Valenzano. The assessment procedure includes: historical and morphological knowledge; non-destructive diagnostic investigation; full-scale ambient vibration testing; structural identification from environmental vibration measurements; finite element modeling; nonlinear dynamic analysis. The analysis shows the importance of reliable finite element models in order to identify the potential collapse mechanisms of the monument and those dangerous structural weak points deeply affecting the seismic vulnerability. At this aim it emerges the effectiveness of a suitable combination of dynamic identification techniques and non-destructive diagnostic investigations.