Abstract
An Improvised Nuclear Device or nuclear bomb of yield 10 kiloton to 20 kiloton explodes in any major city due to terrorism or any other reason can cause catastrophic damages on the building's and other infrastructures and also shutting down of critical life-safety systems.. The explosion may produce blast overpressure, thermal radiation and harmful instant and delayed nuclear radiations. The buildings and other Civil Engineering structures may be highly vulnerabke due to the blast overpressure from the explosion and thermal radiation. In this present study Remote Sensing and Geographical Information System is effectively utilized to model the blast affected zone from the ground Zero of the study area. This study also introduces different emperical methods to estimate blast loads and structural response. The purpose is to describe the blast effects of a nuclear explosion, thereby informing people of the real dangers posed by nuclear weapons. Therefore, as a case study, we consider a hypothetical City as a target for detonation. Due to security reasons the data for existing City is not used for this study purpose. The study area is hypothetically detonated with a 15 kiloton yield nuclear explosion as surface blast and wind spped is assumed as 5 meters per second.
Highlights
The detonation of a Nuclear Bomb or a nuclear device exploded in any city either by accident, terrorism, or any other reason, it is likely to wipe out hundreds of thousands of people which may cause a Local Disaster
In the model city the residential area was selected for the detonation of hypothetical nuclear explosion and the effects were shown in the figure given below (Fig. 8)
In the output the outer most zone given in green colour was considered as the Light damage zone, whereas (a) yellow colour shows the Moderate damage zone and the inner most indicated in red colour is the Severe damage zone or No Go Zone (NGZ)
Summary
The detonation of a Nuclear Bomb or a nuclear device exploded in any city either by accident, terrorism, or any other reason, it is likely to wipe out hundreds of thousands of people which may cause a Local Disaster. As far as nuclear blast overall level of damage and injuries to be expected This loading in Indian cities are concerned the buildings are general prediction can be done based on the size of the categorized according to materials used, year of explosion, distance of the object from the event and construction, design of structures. The relationship to calculate the maximum blast overpressure, Pso, in bars, for a high explosive charge detonates at the ground surface was introduced by Newmark (1961) This is given as follows: Pso = 6784 (W / R3) + 93 {W / R3}1 / 2. In the above Newmark and Hansen formula pressure is fixed as maximum 75 psi and minimum 0.5 psi (National Atmospheric Release Advisory Centre (NARAC)
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