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Dynamic stiffness of monumental flexible masonry foundations

机译:巨型柔性砌体基础的动力刚度

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In this paper we propose reduction factors accounting for the decrease of stiffness of monumental masonry foundations due to aging, weathering, or other deteriorating effects. The proposed reduced stiffness values can be readily used in finite element structural analysis software in the framework of performance-based assessment, representing linear elastic springs at the foundation level. These springs account for foundation-soil system flexibility and soil-foundation interaction (SFI) at low-frequency vibrations. Accordingly, we propose a procedure to reduce monumental masonry foundation-wall stiffness from the rigid-footing assumption, with respect to the relative stiffness between the foundation and the soil. The proposed procedure is applied to the historical structure Arsenal De Milly in the Medieval City of Rhodes, where period elongation and ductility increase are highlighted, because of SFI and foundation flexibility.
机译:在本文中,我们提出了减少因素,这些因素可解决因老化,风化或其他劣化作用而导致的巨大砌体基础的刚度降低。所提出的降低的刚度值可以在基于性能的评估框架中的有限元结构分析软件中轻松使用,代表基础级别的线性弹性弹簧。这些弹簧说明了低频振动下地基-土壤系统的柔韧性和土-基础相互作用(SFI)。因此,相对于基础和土壤之间的相对刚度,我们提出了一种从刚度基础假设中减少砌体基础墙的刚度的方法。拟议的程序适用于中世纪城市罗得岛的阿森纳·德·米利(Arsenal De Milly)的历史结构,该结构由于SFI和基础的灵活性而突出了周期延长和延性的提高。

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