A doctoral thesis was discussed in the Department of Civil Engineering at the University of Technology  entitled “Behavior of composite open web steel joist under static and repeated loading Behavior of the Open-Threaded Composite Steel Gantry Under Static and Repetitive Loading”

The thesis included student Marwa Sami Abdul-Jabbar

Practical results and numerical modeling of the behavior of open-string composite steel joists consisting of a concrete slab cast on top of rolled steel sheets and open steel beams.

The results showed that increasing the concrete strength significantly improved the composite girder capacity to about 34% under static test but had no noticeable effect on deflection, while the use of double angles as trunk members instead of diagonal strings reduced deflection to 11%. The depth of the steel keel or the use of a shear degree with a lower link increased the deflection to about 20% and 46%, respectively.

The results indicated that the energy effect produced high stresses in a short time. This response confirmed that the impact behavior differs greatly compared to the behavior under static load.

The committee composed of Prof. Ali Hamid Aziz as Chairman, Prof. Dr. Amer Farouk Ezzat as Member, Prof. Dr. Abbas Abdel Majid Allawi as Member, Prof. Dr. Iqbal Naim Korkis Member and Prof. Dr. Qais Abdel Majid Hassan, Member, Prof. Mohamed Jaafar Hammoud, Member and Supervisor, and Prof. Dr. Wael Shawqi Abdel-Saheb as Member and Supervisor.