Effectiveness of Seismically Resistant Braced Frames to Blast Loading

Abstract

The increment in the tally of terrorist radicalisation from the past time has exhibited that the consequence of blast loads on structures is a crucial matter that should be taken into cogitation. This paper considers the effect of blast load on seismically designed framing systems namely Moment Resisting Frame (MRF), Concentric Braced Frame (CBF), Eccentric Braced Frame (EBF) and Buckling Restraint Braced Frame (BRBF). The bracings are one of the efficient lateral load resisting systems and their behaviour is observed under the blast loading. The burst load is estimated to be an unconfined surface burst explosion on front face of the structure. Comparative analysis of storey displacement among different framing systems is performed. Failure of members is studied through the analysis of plastic hinge formation. The results indicate that braced frames perform better when exposed to such kind of impact load. Buckling Restraint brace (BRB) exhibited higher level of resistance to blast loading due to its ability to yield in both compression and tension.

Concentric Bracing Frame in Earthquake-Resistant High-Rise Buildings

“…The research suggests that a positive link exists between the connection length and the shear force amount. The shear force resistance of the Concentrically Braced Frame (CBF) demonstrates a substantial enhancement of 92% in comparison to the Moment Resisting Frame (MRF) (Kapoor and Setia, 2020;Jalali, Amiri, and Shakouri, 2021). Therefore, it can be demonstrated that CBF has a higher elastic rigidity, resulting in results similar to Tanijaya's.…”