Nitesh Ahir

Indian Institute of Technology Roorkee | University of Roorkee · Department of Earthquake Engineering

The destruction as loss of life and prosperity occurs due to several types of blast explosives. Explosive upon explosion produces a huge amount of pressure and gases, which moves in all directions from the source point, cause damage to structures and the structure may collapse. Models of a few structures have been designed and analyzed to resist th...

Model updating is the process of using measured data from real structure to update a numerical model representation of the same structure. The measured data can represent either the static or dynamic properties of the structure. Analytical models don't for the most part give comes about that match with experimental data. The reason for it are error...

The increase in the number of terrorist attacks in the last few years has shown that the effect of blast load on structures is a very big issue that should be taken in to consideration for the analysis and design of structures. The phenomenon of Soil - Structure Interaction (SSI) occurs with the variation in its effect depending on type of soil and...

The increase in the number of terrorist attacks in the last few years has shown that the effect of blast load on structures is a very big issue that should be taken in to consideration for the analysis and design of structures. The phenomenon of Soil - Structure Interaction (SSI) occurs with the variation in its effect depending on type of soil and...

Structures are open to the atmosphere for all kind of fanatic action among which one may be explosive materials, viz; Tri Nitro Toluene (TNT), Ammonium Nitrate, Liquid Petroleum Gas (LPG) cylinders, moving vehicles, static vehicles etc. In the scenario, of possibility of war among countries, the structures are not safe against blast loading. This i...

The building configuration of hilly or sloped region significantly differs from buildings on flat ground. The earthquake ground - motion affects badly those buildings that are irregular in geometry and thereby involving torsional effect. These buildings are unsymmetrical in vertical as well as horizontal direction and for this asymmetrical configur...

The Soil-Structure Interaction (SSI) effects are generally considered in case of structures founded on medium and soft soils. The seismic response of asymmetrical buildings during earthquakes importantly altered by lateral force induced by torsion due to non-uniform distribution of mass and stiffness that leads to the damage and failure of structur...

In the design of earthquake-resistant Reinforced-Concrete (RC) buildings, the factors generally considered are configuration of the buildings, adequate lateral strength, stiffness and ductility. These factors influence the performance of structures during earthquakes. Normally, structures with symmetric plans are treated as better alternative than...

The correct numerical modelling of the prototype structure leads to correct results. These anomalies in numerical modelling are due to the assumptions considered during modelling like the difference in on-site material and laboratory material properties, differences in the joint restraint conditions and limited modelling possibilities. Therefore, a...

The structure that exists in real world is true one and not the virtual numerical-model of the prototype. The accurate numerical-model of a prototype leads to accurate design and solution. However, it is difficult to make a numerical model exactly similar to that of the prototype of it. There will always be certain differences in the response of th...

The difficulties in finding the location and amount of damage in the complex - civil infrastructure systems by primal Non - Destructive Techniques (NDT) of damage detection has given thrust to study the technique of damage detection through vibration characteristics of the system. The development of an updated - Finite Element (FE) model of Rein...

The consideration of Soil Structure Interaction (SSI) effects has several changes in the behaviour of the structure which were neglected earlier due to several reasons and complexity being one of the issues. Consideration of SSI effects makes the problem in hand more complex, but is very important in understanding the structure and the soil behavio...

The process where the response of the soil influences the motion of the structure and the motion of the structure influences the response of the soil is called Soil-Structure Interaction (SSI). Normally, SSI is neglected in the force analysis for structures, however, such non-consideration of SSI is valid for flexible structures resting on firm soi...

For a particular building, the magnitude of lateral loads due to earthquakes will depend on the zone in which the building is located and the type of soil upon which the building is supported. The variation in the design lateral loads due to seismic zone and the type of soil will affect the size of the structural members like beams, columns and fou...