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首页> 外文期刊>Bulletin of earthquake engineering >Seismic analysis and strengthening of Pico Island Churches
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Seismic analysis and strengthening of Pico Island Churches

机译：笔克岛教堂的地震分析与加固

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摘要

The proposed study addresses the development of an integrated strategy for modelling, experimental calibration, numerical analysis and seismic strengthening carried out in two churches of the Pico Island, Azores, namely the Bandeiras and the Madalena churches. Following an initial description of the observed damages resulting from the 1998 earthquake, the modelling option for the churches’ structures is outlined. Reference is made to the use of ambient vibration tests that led to the definition of the experimental vibration frequencies and mode shapes which were then compared to the numerical ones for calibration purposes. Seismic analyses were carried out using the actual records of the referred earthquake and the obtained results were analysed in light of the real observed damages.Numerical findings were then used to support proposals for seismic strengthening strategies which are also described and illustrated. The proposals follow a design based approach in the sense that very refined analysis may not be indispensible if the seismic strengthening of this type of structures is mainly directed towards the improvement of the global structure response by enforcing a “box-type” behaviour through simple and not very expensive interventions.
机译：拟议的研究解决了在皮科岛亚速尔群岛的两个教堂，即班德拉拉斯教堂和马达莱娜教堂中进行的建模，实验校准，数值分析和地震加固综合策略的发展。在初步描述了1998年地震造成的破坏之后，概述了教堂结构的建模选项。参考了使用环境振动测试，从而确定了实验振动频率和模态形状，然后将其与数字形式进行比较以进行校准。利用参考地震的实际记录进行地震分析，并根据实际观察到的破坏对获得的结果进行分析，然后将数值结果用于支持抗震加固策略的建议，并进行描述和说明。这些提议遵循一种基于设计的方法，即如果这种类型的结构的抗震加固主要是通过简单而又强制地执行“箱型”行为来改善整体结构响应，那么精细分析就不一定是必不可少的。不是很昂贵的干预措施。

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