ABSTRACT

Historical masonry aqueducts were constructed to convey water over rivers, valleys, etc. Many of them have deteriorated due to different effects and may need to be repaired or strengthened to increase their load carrying capacities. Historical aqueducts are invaluable cultural heritage, and they require particular attention and appropriate seismic strengthening techniques including minimal intervention, better workability and reduced cost. The present study proposes filling the canal with water to improve structural seismic performance of historical masonry aqueducts. The influence of fluid–structure interaction in seismic performance improvement of historical masonry aqueducts is numerically investigated in this study. Three-dimensional (3D) finite element models of an aqueduct including without and with fluid–structure interaction are created using the coupled acoustic fluid–structure (CAS) approach. Concrete Damage Plasticity (CDP) material model adjusted to masonry units and ground motion records matched to site-dependent are utilized in the nonlinear seismic analyses. Seismic performances of the aqueduct models with and without fluid–structure interaction for the only-transverse, combined transverse and longitudinal, and combined transverse and longitudinal and vertical component cases are evaluated and compared with each other.

摘要

历史上建造的砖石渡槽是为了在河流、山谷等处输水。其中许多由于不同的影响已经恶化，可能需要修复或加固以增加其承载能力。历史悠久的渡槽是无价的文化遗产，需要特别关注和适当的抗震加固技术，包括最小干预、更好的可操作性和降低成本。本研究建议用水填充运河以改善历史砌体渡槽的结构抗震性能。本研究通过数值方法研究了流固耦合对改善历史砌体渡槽抗震性能的影响。使用耦合声学流固 (CAS) 方法创建渡槽的三维 (3D) 有限元模型，包括没有和有流固相互作用。非线性地震分析中使用了根据砌体单元调整的混凝土损伤塑性 (CDP) 材料模型和与场地相关的地面运动记录。对仅横向、横向和纵向组合以及横向和纵向和垂直组合情况下的具有和不具有流固耦合的渡槽模型的抗震性能进行了评估，并相互进行了比较。