Date of Award

Spring 2024

Document Type


Degree Name

Master of Science (MS)


Civil & Environmental Engineering


Civil Engineering

Committee Director

Zia Razzaq

Committee Member

Shahin N. Amiri

Committee Member

Mojtaba B. Sirjani


This study presents a theoretical investigation of the influence of both single and dual blast loadings and their duration on the inelastic behavior of a two-story steel plane frame. The influence of the type and duration of blast loading on the frame dynamic elasto-plastic response is studied by numerically solving the governing differential equations of dynamic equilibrium. The effects of the degree of damping and steel yield stress on the frame performance are also identified. Terrorist bombings of buildings have become increasingly prevalent and need to be accounted for when designing structures to prevent excessive deformations and collapse that result in injury or death of the occupants. The study reveals that while a single short duration blast load may lead to smaller deflections relative to longer duration blasts, two short duration blast loads can lead to a larger peak deflection of the structures. Additionally, an increase in the duration of a blast load can significantly increase peak deflection and plastic deformation, but an increase in structural damping can mitigate those effects and even prevent the structure from having any plastic deformation. It is found that when the first story of the frame develops more plastic deformation due to a lower yield stress or structural damping, the deflection of the second story is reduced. The study also shows that dual blast forces on the frame result in larger peak deflection, plastic deformation, and maximum acceleration than those with a single blast force.


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