Papers by rajashekhar swamy
SASTech - Technical Journal of RUAS, 2014
Steel Fibre Reinforced Concrete (SFRC) is now a well-established construction material because of... more Steel Fibre Reinforced Concrete (SFRC) is now a well-established construction material because of its superior resistance to cracking and crack propagation. It can hold the matrix together even after extensive cracking and these fiber composites possess increased extensibility and strength. In this research, extensive laboratory investigations have been undertaken to study the effect of concrete with varying steel fibre contents (0%, 0.5%, 1%, and 1.5%) on mechanical, durability & impact properties. SFRC slab specimens of size 600 × 600 × 60mm (with & without reinforcement) were casted, cured and tested for 28days. Plain concrete specimens were also casted and tested for reference purposes. In this paper, the experimental results of SFRC and plain concrete are discussed for M25 Grade of concrete with hooked end steel fibre dosages of 0.5%, 1% & 1.5% by volume of concrete having an aspect ratio of 60. Simulation studies were also carried out for validation using ANSYS & LS-DYNA. The ...
Keeping damage limitation criterion which allows keeping the operational features of the building... more Keeping damage limitation criterion which allows keeping the operational features of the building intact for a seismic loading which has a large occurrence probability, the objectives of the present study are as given below: a) To develop a large scale Physical model for Space frame structure foundation -soil system including the effects of infilled masonry. b) To include effects of non-linear stress strain characteristics of soil in interaction phenomenon. c) The effect of above factors in dynamic analysis and optimizing the solution procedure for linear and nonlinear soils. In the present study estimate of realistic displacements and force quantities in the structural members, accounting for their three dimensional behavior and nonlinear constitutive relations of soil have been made duly considering effects of i) extent of coupling between foundation and soil, and ii) stiffness of infills. For linear analysis initial tangent modulus is used. For nonlinear analysis hypo-elasticity ...
The design process verification of the structures such as defense building, nuclear power plants,... more The design process verification of the structures such as defense building, nuclear power plants, and embankments needs a special structural design to resist the accidental loads or impact loads namely blast loads, missile loads, terrorist attacks, tornadoes and etc. Natural and man-made hazards have the capability to affect technological installations of nuclear power plant structure and putting the surrounding environment at risk. Blast loads are the dynamic loads, which need to be carefully calculated just like earthquake and wind loads. Thus structural design parameters of the nuclear reactor containment has the strong influence on the structural resistance to blast loads. The study presents behaviour of blast loads and parameters. Reactor containment was modelled and analyzed numerically for evaluating the structural response against blast events using finite element software. The stress and displacement of the structure observed for the blast pressure for different capacities ...
Lecture Notes in Civil Engineering, 2021
Soil reinforcement is a technique for improving the mechanical properties of soil. In recent year... more Soil reinforcement is a technique for improving the mechanical properties of soil. In recent years, the use of reinforced soils has increased widely due to its satisfactory performance and cost effectiveness. Many studies have been carried out on reinforced soil with conventional horizontal reinforcement. The main disadvantage of horizontal alignment of reinforcement is that it requires large-scale excavation of soil, which destroys the strength of soil developed over the years and is also expensive. In this research, studies have been carried out on soil reinforced with vertical reinforcement by considering soil–structure interaction. For this purpose, a four-storey three-dimensional frame structure with isolated footing resting on both un-reinforced and reinforced soil has been considered. Soil has been reinforced with HYSD bars of Fe 500 grade and reinforcement is provided only below footings. The frame section and soil continuum have been modelled and analysed using finite eleme...
Interaction and multiscale mechanics
International Journal of Structural Engineering, 2013
This paper reports on an international study into construction industry development that was used... more This paper reports on an international study into construction industry development that was used as a framework for a study into Hong Kong's construction industry and, based on the findings, argues that the role of a project manager is important to the development of the industry. Having used the same approach for both studies allowed for comparison with and validation of the international generic model. Statistical factor analysis was used to generate the following eight factors that are currently active in the development of Hong Kong's construction industry: financial resources; physical resources; competition; coordination and cooperation; government intervention; long-term vision and policy; communication between government and the industry; and a learning culture. Whilst these factors are sometimes different to the generic model, there is more that they have in common. Many of these have important implications for the role of project managers in the industry. The findings explained in this paper are helpful to all stakeholders in the construction industry from project managers to policy makers worldwide, who face similar challenges to those found in Hong Kong when considering how to best contribute towards the development of their particular construction industry. The paper provides clear examples to show that project managers are in the unique position of being able to significantly influence and effectively promote construction industry development through their management skills and values at various levels, including those at the grass-roots.
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Papers by rajashekhar swamy