چكيده به لاتين
The protection of shores and ports against sea waves always had a special place in engineering problems. Among the available options for this task, rubble-mound breakwaters, due to economic reasons, have become the most common solution. Nowadays, in the oil refinery ports it is possible for pipeline to have some intersections with the protective breakwater, which will lead to some uncertainties about the seismic interaction of this complex and an example of this situation can be seen in the design of pipelines for the Nik Qeshm oil refinery project.
Therefore, in this research which contains over 190 of two-dimensional numerical modeling with FLAC software in 1:1 scale, evaluating the effect of different parameters such as pile geometry, nature of bed layering and presence of carbonate sand in the bed is addressed under the seismic loading of Tabas, Manjil, Bam and Sousa on the seismic interaction of rubble-mound breakwater with piles and to estimate the damage level of breakwater using S criterion. It should be mentioned that in all numerical models, Finn's behavioral model was used due to its ability to calculate extra pore water pressure.
Investigations showed that interaction of breakwater and pile causes some complications in breakwater seismic behavior and application of breakwater-pile system won’t necessarily lead to improvement in seismic behavior of breakwater. Based on obtained results, the effect of pile on the seismic deformation in the body of breakwater is undeniably dependent on the seismic loading conditions and the nature of bed layering. It was also observed that with the changes in bed layering, deformations in the breakwater would varies between 15 and 40%, which suggests that simplifying the conditions of the bed into two general loose or rigid conditions, in some cases, can lead to unrealistic results.
Keywords: rubble-mound breakwater, pile, seismic interaction, deformation, damage level
