نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه بیرجند
2 استاد گروه سازههای آبی، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Researches show that one of the most effective factors on bridge destruction is bridge
abutment scour. In this research, the role of collar as a control structure of bridge abutment scour
was investigated along with the effect of its roughness. The results were then compared with
smooth collars at the same condition. The results showed that the rough collars installed above the
bed level showed a better performance in comparison to the smooth collars so that installation of
the rough collar at a distance equal to 20 percent of the water depth above the initial bed level
caused the performance of collar to be increased 14 percent, as compared to the condition with
smooth collar. In the condition that the collars were installed above and below the bed surface, the
performance of rough and smooth collars didn’t have a significant difference due to the small space
under the collars.
کلیدواژهها [English]
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