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FEM modelling of the seismic behavior of a tunnel-soil-aboveground building system: a case history in Catania (Italy)

机译:隧道土地上建筑系统地震行为的有限元模拟 - 卡塔尼亚(意大利)的案例历史

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In the design of tunnels it is extremely important to assess the possible damage to the tunnel and to the aboveground structures in order to provide adequate mitigation measures, above all in high seismic hazard areas. Great attention has been devoted to separated tunnel-soil interaction analysis and soil-aboveground structure interaction analysis. Unfortunately, studies involving tunnel plus soil plus aboveground structures (full-coupled analysis) are still very rare. The present paper deals with the seismic response of a tunnel-soil-aboveground building system. The effects of the tunnel on the response of the soil and/or of the building and vice versa have been analysed by means of a full-coupled FEM modelling. A cross-section of the recently-built underground underground in Catania (Italy), including an aboveground building has been analysed and considering the expected scenario earthquake. Results are reported in terms of amplification ratios, frequency ratios, as well as dynamic bending moments in the tunnel. The main goal of the paper is to highlight the combined effect of tunnel and aboveground structure.
机译:在隧道的设计中,评估隧道的可能损坏以及地下结构的可能损坏是非常重要的,以便提供足够的缓解措施,最重要的是在高地震危险区域中。很大的关注已经致力于分离的隧道 - 土壤相互作用分析和土壤 - 地上结构相互作用分析。不幸的是,涉及隧道加土壤加上地上结构的研究仍然非常罕见。本文涉及隧道 - 土地地上建筑系统的地震反应。通过全耦合的有限元模拟分析了隧道对土壤和/或建筑物响应的影响,反之亦然。在卡塔尼亚(意大利)最近建造的地下地铁地下的横截面,包括在地上建筑物,并考虑了预期的场景地震。结果在扩增比率,频率比以及隧道中的动态弯曲时刻报道。本文的主要目标是突出隧道和地上结构的综合影响。

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