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首页> 外文期刊>Bulletin of earthquake engineering >Predicting the seismic behaviour of the foundations of the Messina Strait Bridge
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Predicting the seismic behaviour of the foundations of the Messina Strait Bridge

机译：预测墨西拿海峡大桥基础的地震行为

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摘要

This paper presents some of the geotechnical studies carried out for the seismic design of the one-span suspension bridge across the Messina Strait, that is to connect Sicily with mainland Italy. These studies included advanced geotechnical characterisation, through in situ and laboratory tests, estimate of site stability involving both liquefaction analysis and submerged slope stability, evaluation of soil-foundation stiffness for spectral analysis of the superstructure, 3D FE static calculations, evaluation of anchor block performance under seismic conditions, and full dynamic analyses of the soil-structure interaction. The paper summarises the main results obtained from the geotechnical characterisation of the foundation soils, reports the approach adopted for evaluating the seismic performance of the anchor blocks through a modified Newmark-type calculation, and presents the study of the soil-structure interaction carried out through a series of two-dimensional, plane strain numerical analyses. In these analyses, in addition to the embedded foundation elements, the models included a simplified structural description of the bridge towers specifically designed to reproduce their first vibrations modes, that were deemed to have the most significant influence on the system's dynamic response. The illustration is limited to the foundation systems of the bridge located on the Sicily shore.
机译：本文介绍了对横跨墨西拿海峡的一跨悬索桥进行抗震设计的一些岩土工程研究，该桥将西西里岛与意大利本土连接起来。这些研究包括通过原位和实验室测试进行的高级岩土工程表征，液化分析和水下边坡稳定性的现场稳定性评估，上部结构频谱分析的地基刚度评估，3D FE静态计算，锚固块性能评估在地震条件下，以及对土-结构相互作用的全动力分析。本文总结了从基础土壤的岩土特征中获得的主要结果，报告了通过改进的Newmark型计算评估锚固块抗震性能的方法，并提出了通过一系列二维平面应变数值分析。在这些分析中，除了嵌入式基础元素之外，这些模型还包括对桥梁塔架的简化结构描述，这些桥梁塔架专门设计用于重现其第一个振动模式，这些振动模式被认为对系统的动态响应影响最大。图示仅限于位于西西里岛海岸的桥梁基础系统。

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