Browsing by Author "Usman Ilyas"

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    Design & development of zero head horizontal axis hydrokinetic turbine
    (UMT Lahore, 2022-08) Usman Ilyas; Usama Shabir; Muhammad Ali
    With the exponential increase in energy demand, the forecasted value in 20 years is 260% of the present demand. Meanwhile Pakistan is still facing 5000MW of shortages of electricity. Pakistan has a great potential of renewable energy generation using dams, onshore and offshore wind farms and solar energy etc. Large investments, governmental unwillingness, lack of technological and manufacturing skills are the main hurdles. This research aims to overcome these hurdles by proposing innovative zero head hydrokinetic turbine design that can capture energy with no or little requirement of costly civil work and high skill labor to form turbine shape. This turbine is able to work at relatively flat areas of Sindh and Punjab Province having massive amount of unused water resources. From the perspective of increased usage of alternative energies, the focus has been diverted toward multiple renewable resources including Hydrokinetic turbines. Tig Welding done by using two different materials i.e. aluminum and stainless steel. To efficiently design the turbine, a CAD model has been presented to do the CFD analysis and for the development, a prototype has been constructed based on generated results.
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    Progressive collapse of reinforced concrete frame structure under column damage consideration
    (Pak. J. Engg. & Appl. Sci, 2015) Usman Ilyas; S H Farooq; I. Shahid; M. Ilyas
    The research work is focused on progressive collapse analysis of reinforced concrete framed structure under column damage consideration using commercial software SAP2000. Nine story frame is selected and designed under gravity loads as per Pakistan Building Code. The frame is analyzed for progressive collapse under three damage cases; corner column damage, edge column damage and internal column damage. The frame is subjected to loading as described by General Services Administration (GSA) guideline for carrying out linear static analysis. The results include the variation of bending moment of beams and evaluation of demand capacity ratios(DCR) in the beams of the longer direction. The vertical deflections of the damaged joint are determined in cases with 0%, 40%, 60%, 80% and full damaged consideration. According to the GSA guideline atypical frame building having DCR values greater than 1.5 indicate more damage potential in the structural members. It is concluded that the edge column case with long bays is found critical because the bays with longer span have more damage as compared with smaller span bays. It can lead collapse of the frame in short interval of time and there is more possibility of loss of lives under such condition of structures. Based on this research it is suggested that the practicing engineer should incorporate the GSA guidelines for loading along with the other loads so that progressive collapse potential may be reduced up to some extent.