Structural and Infrastructural Safety
Sachin Popat Patil; Jagadish G Kori
Abstract
According to current practices in earthquake engineering, and as per guidelines of codes the multistoried structures are analyzed and designed only for a single, rare design earthquake. In reality, most of the locations are affected by multiple earthquakes within short time intervals, also the repeated ...
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According to current practices in earthquake engineering, and as per guidelines of codes the multistoried structures are analyzed and designed only for a single, rare design earthquake. In reality, most of the locations are affected by multiple earthquakes within short time intervals, also the repeated earthquake effect is ignored. The repeated earthquake affects the strength and stiffness degradation of the structure. In this paper4-, 8-, 12-, 16-storey structures are investigated under repeated earthquakes. The Time history analysis is performed with single, double, and triple earthquake events for calculating drift, displacement, and ductility. The result shows that the drift, displacement, and ductility demand increase with compared to a single earthquake. This research focuses on the study of the effect of a single and repeated earthquake on the multistoried structure and damage identification can be found using deformation in building frame or in frame element with the formation of plastic hinges. The default hinge properties are assigned to elements of structure and the study is carried out to find the location, formation of plastic hinges, and plastic hinge rotation due to repeated earthquake and this study is used to strengthening the element strength. This paper studies the interstory drift ratio and displacement under aftershocks of an earthquake and remedial measures are suggested to strengthen the structure capacity.
Risk Assessment
K.K. Kiran; Jagadish G Kori
Abstract
Blast load is an impulse, unpredictable load occurs on the structure. It causes not only damage to the structure but also takes the life of the people. Here an attempt is studied is carried out for a high-rise structure exposed to blast load. The response is calculated by using Adaptative based modal ...
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Blast load is an impulse, unpredictable load occurs on the structure. It causes not only damage to the structure but also takes the life of the people. Here an attempt is studied is carried out for a high-rise structure exposed to blast load. The response is calculated by using Adaptative based modal push over analysis. The responses are storey drift, displacement, velocity, accelerations, pressure, impulse, base shear, interstorey displacement, storey drift ratio and normalized pressure impulse. The three-dimensional analysis is carried out. The response is controlled by using M R damper and cladding material. The different algorithm is used for the analysis of MR damper are Bang Bang, Clipped Optimal, Lyapunov and LQR control algorithm.
Structural Simulation
K.K. Kiran; Jagadish Kori
Abstract
Designer of military and high-security facilities, planner, architects and engineers throughout the world are much concerned against a blast load on structures. Blast load is a human hazard occurring in the world, due to terrorist, chemical explosives, mining area, an accident, and so on. Blast load ...
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Designer of military and high-security facilities, planner, architects and engineers throughout the world are much concerned against a blast load on structures. Blast load is a human hazard occurring in the world, due to terrorist, chemical explosives, mining area, an accident, and so on. Blast load is an unpredictable load occurring. The blast load occurs in a few seconds. The blast load does not only lead to structural but also take the life of occupations. In this study five – storey unsymmetrical structures exposed to blast load are considered. The three different control devices are considered such as cladding material, base isolation with lead rubber bearing (LRB) and MR Damper. Cladding material will absorb energy after the severe pressure release from the blast and then transfer less amount of energy to the structures. Base isolations with lead rubber bearing not only absorb energy but also increase the stiffness of the structure. Among the different devices’ MR Damper plays a vital role reduce the considerable amount of responses.
