Journal of Structural Engineering & Applied Mechanics (2022) 5(1):13-21 DOI 10.31462/jseam.2022.01013021 RESEARCH ARTICLE Correspondence Ahmet Tuğrul Toy atugrultoy@gmail.com eISSN 2630-5763 © 2022 golden light publishing® All rights reserved. Structural response of multi-story building subjected to blast load Ahmet Tuğrul Toy , Barış Sevim Yıldız Technical University, Department of Civil Engineering, Istanbul, Türkiye Article History Abstract Received Accepted 16 September 2021 18 February 2022 This paper aims to present blasting effects on the structural response of a 5-story building considering its columns, shear walls, beams, slabs, raft foundation, masonry walls, and windows. The building with a geometry of 12×20 m in plan and a height of 15.5 m is considered. The three-dimensional finite element model of the building is constituted using ANSYS Workbench and blasting analysis is explicitly performed in ANSYS AUTODYN. TNT is exploded to give blasting effects on the structure. The duration of the explosion is set to 3-msec. Stresses, displacements, material status, and pressures due to blasting on some gauge points are presented. It is seen from the study that the blast causes local damage to the load-bearing elements. Keywords Blast load Explosion ANSYS Workbench AUTODYN TNT 1. Introduction In recent years, terrorism has become one of the biggest problems all over the world, so full protection against terrorist attacks awaits a definitive solution. The ignition of the fuse of the explosive affects the environment, structures, and people therein. To date, researchers have conducted numerous studies and, based on experimental results, have increased the protection against explosive loads.. It is necessary to investigate the behavior of explosion effects on structures. As a consequence, some of the studies in the literature have been examined. Nicholls et al. [1] investigated blast vibrations and their effects on structural behavior. In the study, they stated that if the particle velocity that will occur during the explosion is about 5 cm/s and the air pressure effect on the structure is up to 3.5 kN/m² levels, the structures will remain on the safe side, and damage may occur in the structures for larger values. Gad et al. [2] investigated the effects of the explosion in a single- story building near the mine. For a year, the building was monitored by accelerometers during explosions with a ground particle velocity of 1.5-222 mm / s. The crack conditions before and after an explosion in the building have been examined, and a procedure has been tried to be developed between the particle velocity and the crack formation. Ngo et al. [3] studied the explosion load and its effect on structures and drew attention to the terrorist attacks carried out by trucks loaded with explosives in the city centers and made a general evaluation of this issue. In the study, he examined the nature of the explosion and the propagation mechanism of the explosion waves in the air environment and mentioned different methods related to the structural behavior and estimation of the explosion loads. Nateghi et al. [4] investigated the effect of explosion waves on the concrete of underground structures. In the study, methods to control the explosion waves were developed and the negative effects of the waves were tried to be eliminated. Draganic and Sigmund [5] prepared and analyzed a model in the SAP2000 program to see the behavior of a structure that