Safety assessment of r/c columns against explosive attacks by vehicle or human from exterior

Altunlu, Kartal
Reinforced concrete structures may be subjected to blast loads together with static loads during their service life. Important buildings may be attacked by using explosives as a part of increasing global terrorist activities. Evaluation of blast phenomena for economically and strategically significant buildings is especially important, in order to analyze and design their structural members subjected to air blast loading. Understanding nature of explosions, which are loading characteristics and relation to selected parameters such as explosive type, quantity, and distance, were studied in this thesis. Earlier studies found in the literature survey on explosives, blast, and behavior of structural elements were investigated. Behavior of structures under blast load was described in terms of pressure magnitude, distribution, and reflection phenomena. Simple design, assessment guidelines, and useful charts were developed. A computer program was generated using MATLAB programming language, which automatically generates the air blast pressure versus time data resulting from an air explosion in addition to finite element model formation and dynamic time stepping analysis of a reinforced concrete column. The shear and moment capacities can be calculated and compared against dynamically calculated demand under known axial column force; therefore, vulnerability of a column under blast loading is evaluated. The results of the numerical analyses indicated that failure mechanism of columns is mostly shear failure instead of moment (i.e., plastic hinge and mechanism formation).


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Citation Formats
K. Altunlu, “Safety assessment of r/c columns against explosive attacks by vehicle or human from exterior,” M.S. - Master of Science, Middle East Technical University, 2008.