International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 01 | Jan 2024
p-ISSN: 2395-0072
www.irjet.net
A Review On Behavior Of Tall Structure Under Blast Loading Deep Modi1, Kishan Pala2, Aakash Suthar3 1M.Tech Student, L.J. University, Ahmedabad
2Kishan Pala/3Aakash Suthar, Assistance Professor, structural Engineering Department, L.J. University,
Ahmedabad, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Today's bomb explosion close to a structure can
seriously harm both the interior and exterior of the structure. The building may sustain mild, moderate, or significant damage as a result. This study's primary goal is to compare building models and determine how they react to blast loads using ETABS software. In this investigation, an 11-story building is charged with 100 kg and 200 kg of TNT at 20-and 40-meter stands. The formula for blast parameters is IS 49911968.Four more models are examined by putting various structural systems into practice. The models' responses in terms of storey displacement and storey drift are examined in order to identify the model that has the structural component that helps resist blast effects.
Figure 1: Collapse mechanism due to blast wave. The initial manifestation of the explosion's shock wave is observed to induce the fragmentation of windows, exterior walls, and exterior columns, as illustrated in the visual representation displayed in figure 1.
Key Words: Dia-Grid Structure, Structural Design, Seismic Load, E-tabs Software.
1.INTRODUCTION
Following this, the vigorous character of the shock wave impels the elevation of the floors and slabs, as depicted in the graphical depiction provided in figure 1.
The investigation of blast impacts on structures has been the subject of formal technical investigation for more than sixty years. An explosion caused by a bomb inside or in close proximity to a building can led to damage to the building's external and internal structural frameworks, the collapse of walls, the fragmentation of large areas of windows, and so forth. Loss of life and injuries to occupants can occur due to various factors, including direct blast effects, structural collapse, fire, and smoke.
Lastly, the shock wave envelops the edifice, leading to a downward force exerted on the roof and inward pressure exerted on all sides of the structure, as presented in the illustrated representation appearing in figure 1. The occurrence recognized as air blast encompasses a blast wave that provokes an augmentation in air pressure in the proximity of a architectural formation.
Traditional structures are generally not designed to withstand blast loads, and because the magnitudes of design loads are significantly lower than those produced by most explosions, traditional structures are susceptible to damage from explosions. The loading from a blast and its effects on a structure are influenced by several factors, including the weight of the charge, the location of the blast (or standoff distance), and the geometric configuration and orientation of the structure (or direction of the blast). The structural response will vary depending on how these factors come together. Therefore, understanding the impact of a building under blast load is crucial for the safeguarding of a structure.
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Impact Factor value: 8.226
In the event of immediate ground disturbance, when an explosive is either partially or fully submerged beneath the exterior of the ground, it yields a lateral oscillation of the ground, resembling an earthquake but with a discernible frequency.
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