Students Project:

M. Tech. (2007 Batch)

Anoop K. Shrivastava : Comparison of Design Provision for Concrete Structures Using Various Country Code

Design of concrete structure is very important aspect of Building design.  Indian government has prescribed the provision for designing the concrete structures in IS 456, same all the other countries are following their own provisions to design the concrete structure.  In this project I am designing a beam for different country codes and their practice including our Indian code to understand their design philosophy and then compare the design results with Indian code to understand the strength and shortcoming in our code.  American code, New Zealand code and Euro code are compared with Indian code.

Arfat Ahmed : OOP FEM Module for Static Analysis

Object Oriented Programming (OOP) is an art of programming that uses objects to design applications and computer programs.  It utilizes several techniques that are inheritance, modularity, polymorphism and encapsulation.  Even though it was originated in 1960 but became popular in 1990 and today nearly all popular programming languages supports OOP concept.

  OOP may be seen as a collection of cooperating objects, as opposed to traditional view in which a program may be seen as a lift of instructions to the computer.  In OOP, each object is capable of receiving messages, processing data, and sending messages to other objects,  Each object can be viewed as an independent little machine with distinct role or responsibility.

Aveendra Singh : Horizontally Curved Beam Element And Its Application To The Analysis of Ring Foundation of Water Tower

In the present thesis, a detailed Finite Element formulation for a horizontally curved beam element including the effect of shear deformation and considerating the elastic foundation effect has been proposed.  Based on the above formulation a three Noded Curved Issparametric beam element is developed.  As the effect of elastic foundation is being considered, the element can efficiently be used for the analysis of any annular foundation.  In Later part of the thesis, performance of the element is checked through various examples. The element can be used to solve the problems of straight beam indicating its versatility.

D. Ramakrishna : Stress and Displacement around an Elastic Artificial Rectangular Hole

In engineering practice, rectangular holes (openings) are often encountered.  The presence of rectangular holes increases the complexity of the analysis of engineering media and structural members.  However, there is currently no simple but sufficiently accurate solution readily available for engineers to obtain stress and displacement distributions around an artificial rectangular hole in an elastic and isotropic plate subjected to uniaxial stress at infinity.  A linear elastic plane stress analysis is carried out using complex variables.  By introducing a new procedure of calculating the correction factor, simplified and explicitly expressed, a conformal transformation function that transforms the area outside an arbitrary rectangular hole into the region inside a unit circle is created and used to obtain the solution.  The solution is verified by comparing the calculated results with the values obtained from the existing procedure.  A comparison has also been drawn between the new and existing procedure for calculating the correction factor.

M. Shiva Prasad Reddy: Finite Element Analysis of Circular Cylindrical Shell

A Four-Noded quadrilateral pure shell element based on the thin shell theory of Koiter’s following the Kirchhoff-Love hypothesis has been developed.  The element having nodal degrees of freedom as 6, is formulated on the plane reference domain by a mapping of the curved shell middle surface form the three-dimensional space.  Any arbitrary global coordinate system can be used due to the implementation of tensorial coordinate transformation.  Excellent behavior of the element is observed when tested against a opposing radial loads on circular cylindrical shell.  This shell is descritized using a four noded curved quadrilateral.  The results form the tests demonstrate that the element is able to handle rigid body motion without straining and is able to avoid membrane and shear locking properties states.  The two dimensional bilinear interpolation functions are formed from the tensor product of lagrange one dimensional interpolation functions.  The membrane strain is integrated at exact integration at exact integration and for the bending strain reduced integration is adopted.

M. Ravi Kumar:  Optimization of Design of Post Tensioned Prestressed Concrete Bridge

Prestressed concrete bridge construction has picked up world over, in the recent past.  This may be due to the increased urbanization and industrialization requiring heavy transportation links between various cities.  PSC constitutes a majority long span bridges in the world today, due to their relative advantages over other types of construction.

 There is a major disadvantage of PSC, that is not economically feasible when compared to RCC or Steel Constructions.  This leads to the necessity of and the optimization techniques which can be implemented on it.  In this project, optimization techniques has been introduced to reduce the cost of construction by a large amount, this can attract designers to prefer PSC over other construction techniques.  The economy achieved is quite revealing and economizing design is therefore a continuing exercise and should continue during the construction period as well.

P. Niharika : Design of Roof Top Tuned Mass Damper Frame

The Project checks the feasibility of placing a storey in the form of weak storey.  This storey is placed as the top floor the building.  This weak storey is designed such that its natural frequency matches with the buildings natural frequency.  The mass of this additional storey is taken as 2 to 5% of the total mass of the structure.  The analysis indicate that adding mass in conjunction with a RCC moment resisting frame on the roof results in the elongation of the fundamental period of the structures.  The seismic acceleration response reduction was achieved in case f structures located on stiff soils, although the response could increase if the rooftop frame was not tuned to accommodate the structure’s  behavior, specific earthquake characteristics, and local soil conditions.  The RTMDF is a frame with square columns and there are no infill walls for this frame.

P. A. Sasikumar : Interfacial Fracture Mechanics: Patch Repaired System in Beam

Most of the structures in India were constructed when only simple methods could be used to properly design them.  But now the approach of finite element studies has advanced in such a way that current analysis procedure for the safety assessment remains the same as those used earlier for the designs.  In this project a numerical study of the stress intensity factors (SIF) (K1, KII) at a bi-material interface of a repair patched beam loaded in three point bending for mixes of different compressive strengths. These results are compared with results determined from Franc-2D/L, a two-dimensional fracture mechanics analysis code developed by Cornell Fracture Group.  It is found that the numerical predictions for the SIF were related with the corresponding results from Franc-2D/L also determined the effect of the SIF due to the increase in the crack length.  This helps in determining the additional load from the normal load to which the beam can afford.

P. Anuradha :  Time History Analysis of A Multi Storey Framed Structure With and Without Shear Wall

The following report gives linear time history analysis of a multi storey framed structures.  As earthquake motion is dynamic in phenomenon, so response of the structure is also dynamic.  The time history response method provides information regarding the seismic behavior of a structure.  This report focuses on dynamic behavior of structure under seismic loading.  This procedure includes determining the time period of the structure due to ground motion, and response history of the structure with and without shear wall.

P. Papi Reddy : Dynamic Behaviour of Rigid Block

This report examines in depth the transient rocking response of free-standing rigid blocks subjected to physically realizable trigonometric pulses.  First, the expression for the dynamic horizontal and vertical reactions at the pivot point of a rocking block are derived and it is shown that the coefficient of friction needed to sustain pure rocking motion is, in general, an increasing function of the acceleration level of the pulse.  Subsequently, this paper shows that under cycloidal pulses a free standing block can overturn

R. Swathi : Finite Element Analysis of Rectangular Slab Under Static and Dynamic Loading

For the analysis of structures like slabs, it is modeled as Kirchoff’s thin plate and bending analysis is done using Finite Element Analysis.  Slab is assumed to be homogenous and isotropic in nature.  Both static and dynamic analysis performed and the behavior of the slab under various boundary conditions is obtained from the analysis.  Only rectangular slabs of uniform thickness were considered.  Displacement based finite element is used for the formulation.  At each node three degrees of freedom were considered.  Displacement models used are non conforming triangular element and non-conforming rectangular element.  Though the elements are non-conforming, the results produced are satisfactory to engineering applications.

A. Rajani : Analysis And Design of Horseshoe Shaped Tunnel

Tunnels are used to carry a roadway through a mountain or under a river instead of around or over those obstacles. Tunnels can be very expensive to construct and maintain due to drilling and ventilation requirements.  Generally, most tunnels are located in mountains or in hilly regions.  Tunnels may be classified according to their purpose, location and geological situations.  Tunnels are constructed in different shapes out of which the Horseshoe shaped tunnels are more popular as there cross-section offers a good resistance to external ground pressure.

The Horseshoe shaped tunnel cross section is divided into three parts, the top arch is considered as fixed at ends, inverted arch and site wall regarded as completely rigid and supported elastically.  The external loads consist of the self-weight, vertical and horizontal earth pressure and the reactions such as the bearing pressure under the base, the passive earth pressure behind the walls and horizontal and vertical forces of friction.  According to these loads analysis of the tunnel is done by analytical method.  In the simpler method all the end supports are assumed either to say in place or not affect the reaction by any displacements.

Arches are very sensitive in horizontal displacement of the springing.  If the relative displacements at the springing cannot be neglected, then the effects of the support movements have to be included in the arch design and the cross section is designed according to the analysis values and detailed the reinforcement of tunnel and programmed the GUI for analysis and design in C# .Net and also comparing the values with TURNEN (Tunnel Design Tool).

Rozina . N. Jiwani : Estimation of Along-Wing Moments In Reinforced Concrete Chimneys: Comparision of Various International Codes

The present thesis deals with the estimation of along wind moments in Reinforced Concrete Chimneys.  Various international  codes give its own recommendations for estimation of Design along wind moments in Reinforced Concrete Chimney’s.  The Thesis particularly focuses on comparison of these international codes to assess the relative accuracy of each of them.

First of all, a comparative study among the ACI-3071, CICIND2, IS-49983, is being carried out, which reveals that there exist significant disparity among these codal estimates.  An important and critical outcome of this comparative study is that IS Code significantly stands apart from other two codes and overestimates the design base moment by more that 50%.

Secondly, Exact analysis that is Rigorous Analysis performed by professor Devdas Menon (PhD Thesis) is taken up in the present thesis as a basis to validate and compare the gust factor methods adopted by RC Chimney Codes Worldwide.  The three codes are again compared with Exact Analysis, this comparative study revealed that ACI, CICND code are closer to Exact Analysis but IS Code is much apart form Exact Analysis and it significantly overestimates the Design Base Moment, hence for a more rational design, modifications to IS Code recommendations is justifiable.  An attempt has been made to do the same in the present thesis.

Formulating the element stiffness matrix from such a combination and performing exact analysis as basis to validate the comparison can be up as future

 P. S. L. Hima Bindu: Tsunami Wave Propagation

After December 2004 tsunami in Indian Ocean, nations surrounding it have felt the necessity of Tsunami Warning System in Indian Ocean.  Warning System is developed by first developing an application which can issue warning signal, when the source from where tsunami originates, is known.  This project aims at simulating Tsunami wave in Indian Ocean and there by to develop a Tsunami Warning System application for Indian Ocean.  There are many factors which influence the travel pattern of wave.  Among these, three factors are identified to be of major importance.  They are depth variation of ocean, boundary which effects wave travel pattern and wave reflections.  Here, Tsunami wave is simulated by considering depth criteria and method to implement boundary effect on wave is developed.

P. V. Dilip Kumar: Optimum Evacuation At Public Gathering Places

Urbanization is rapidly increasing all over the world.  Past 2 decades in India, many cities have attracted large population.  Reasons being the belief of better education, health, care, job/business prospects, etc.  For meeting the demands of population density many high-rise structures and large public gathering places are emerging in cities.  Places where high-rise thousands of people can meet are quite common in major cities.  It is due to this reason, evacuation at the public gathering places has gained a lot of importance.

Though some traditional hand calculation procedures are available for the estimation of evacuation time, we have attempted to simulate the same in more realistic and reliable way by using latest computational techniques.  In this paper, we have developed a procedure to calculate the optimum evacuation time by taking input parameters like dimensions of the building, number of doors, size of doors, number of people and seating arrangement.  This tool will help architect in efficient design of a public gathering place.

Y. Muralidhar: Site Amplification Studies At IIIT-Hyderabad

Site amplification refers to the phenomena wherein the local soils act as a filter and modify the ground motion characteristics.  Amplification of seismic waves as they travel from bedrock to the ground surface causes transfer accelerations to structures hence causing destruction, particularly when the resulting seismic wave frequency matches with the resonant frequencies of the site amplification during the expected earthquake and also the response spectrum at the ground surface.  Various parameters that are needed for seismic response analysis are soil profile and its thickness, depth to bedrock, geotechnical properties of the soil and shear wave velocity.

In the present study, site specific ground response analysis was done using  Shake 2000 which is widely used one-dimensional ground response modeling software at 8 locations considerably covering the entire IIIT-Hyderabad.  The subsurface profile information which was collected from bore logs and the bed rock motion were used as input.  The acceleration time history at the ground surface is obtained as output and was characterized by the PGA and the response spectra.