Three-dimensional mesoscale modelling of multi-span masonry arch bridges subjected to scour

摘要: Abstract Many masonry arch bridges cross waterways and are built on shallow foundations which often submerged exposed to the scouring action of stream. The limited resistance foundation settlements makes them very vulnerable scour calls for development advanced tools evaluating improving capacity against this flood-induced effect. This paper describes a novel three-dimensional modelling strategy describing behaviour multi-span subjected at base pier foundations. A mesoscale description is employed representing heterogeneous units, mortar joints brick-mortar interfaces, whereas domain partitioning approach allowing parallel computation used achieve computational efficiency. process described via time-history analysis in elements soil progressively removed from model according specific evolution. proposed first simulate available experimental tests dry wall settlement bearing system reduced scale brick-masonry bridge specimen scour-induced settlements. Subsequently, numerical example consisting presented illustrate potential its capabilities vulnerability risk under flood scenarios.