The Civil Engineering Department at UOT granted PhD about "Experimental and numerical modeling of local scour around bridge structures"

The Department of Civil Engineering granted PhD in the field of water resources engineering to the student (Zahraa Fadel Hassan) on 9/21/2020 and in high studies hall at the department for her research tagged:-

"Experimental and numerical modeling of local scour around bridge structures"

The discussion committee consisted of:-

 Prof. Dr. Hamid Hassan/ the head-

- Prof. Dr. Mahmoud Saleh Mahdi / Member

-.Prof. Dr. Mustafa Tariq Mustafa / Member

- Assist. Prof. Dr. Ali Sadiq Abbas / Member

- Assist. Prof. Dr. Shaima A. Hashim / Member

- Prof.  Dr. Abdul Hassan Khader / Member and Supervisor

  Assist. Prof. Dr. Ibtisam Rahim Karim / Member and Supervisor-

In this research, local carving around the bridge structures was studied in the river environment, as it is a major cause of bridge failure.

Where an experimental study was conducted using laboratory models and circular piles of bridge models that was constructed in cohesive soil of clay and fine sand. Experiments were conducted with a flow velocity close to the critical velocity of the sandy part of the stratum sediments. The models were placed in three single and tandem arrangements (two successive pillars in a straight line) parallel to the direction of flow And tandem pillars are tilted at an angle, where the results showed that the depth of carving is greater in the front pillar of the tandem arrangement than in the case of the single pillar, and the depth of carving is always greater in the front pillar and less in the back pillar The depth and extent of carving increases with an increase in the angle of inclination of the pillars for the same spacing and the rate of sculpture is strongly affected By increasing the clay content in sediments

The results of the study indicated that it is not possible to predict the depth of localized carving around the abutments established in cohesive clay soils with direct application of the carving equations that were developed for a non-cohesive soil condition.