Stuctural Engineering

I am a project management professional with over Nine years experience in the building and construction industry. My strong communication skills coupled with my ability to lead through adversity have seen me complete countless projects on time and within budget. A bright, talented and ambitious project manager who has the required Practitioner qualifications along with comparable experience of working to the highest standards. Wahid has a long track record of ensuring projects are delivered to the highest quality, within budget by effectively organizing, managing and utilizing all resources. He is able to lead teams on commercial, industrial, education and health projects where the highest standards are routinely demanded. Always wanting to be actively involved in all aspects of the project life-cycle he can deliver high-value projects in matrixes organizations and across different geographies. He takes direction well and works hard to manage stakeholder expectations. Wahid is willing to travel and/or spend long periods abroad, and is currently looking for a suitable position with a market leader company.

"Nowadays, the issue of structural safety under blast loading has become a dramatic problem.
The tragic news  of the terrorist attacks of recent years (9/11/2001, New York; 7/7/2005, London; 7/23/2005, Sharm El Sheik; 1/24/2011, Moscow; etc), raise important, urgent questions regarding the real safety and reliability of our buildings. Extreme loads such as impacts, explosions, etc., can occur in everyday life with unexpectedly high frequency. Actually, the problem of terrorist attacks, so important for strategic and military building design, has been linked to residential and industrial building explosion accidents. The present thesis deals with the flexural failure of Reinforced Concrete beams under blast loads. The main aim is firstly to develop dynamic and energy models capable of evaluating the response of R.C. under explosive load. Then a sensitivity analysis is obtained by means of the above mentioned models in order to determine what are the key  parameters in the beam response. In this way it is possible to attain simple predictive polynomial formulations and, finally, simple table for early tructural assessment of beams under blast load during the design rocedure.
The thesis is composed of three sections. Various dynamic models are developed in Section 1, taking into  account the strain-rate sensitivity of both steel and concrete, as well as other nonlinearities in structural behaviour. Models with different levels of complexity are presented, from the simplest Single Degree Of
Freedom (SDOF) system to Continuous Beam and Finite Element models. The characteristics, advantages and disadvantages of each approach are stated and discussed. The author compares his models with some experimental findings available in the scientific literature. The principal innovation that can be inferred from this section is the hypothesis of distributed plasticity along the beam (in the continuous model), represented by a non-linear smooth relationship between bending moment and curvature. This relationship, in addition to the Euler-Bernoulli beam equation, yields a non-linear Partial Differential Equation solved by means of the Finite Difference Method. In Section 2, the same problem is solved in a different way: starting from the principle of energy conservation, the innovative procedure, developed by the author, can calculate the displacement field of a R.C. beam under blast load. This procedure, less accurate than the previous one, produces very good results regarding midspan displacement, especially as it requires less computation time.
In order to better understand the phenomenon, with the aim of identifying the key parameters in structural response, a sensitivity analysis is developed in Section 3. To this end, the author has performed a numerical investigation referring to the SDOF model presented in Section 1. Several numerical simulations are performed, with random variation of beam and load characteristics. Results are expressed in terms of maximum deflection and maximum velocity for each case. Then a least-squares interpolation has produced various polynomial curves and surfaces representing both a simplified tool to estimate structural response and a sensitivity analysis of the key parameters involved. One of the possible developments of this useful work is represented by simple tables that provide the response of the beam under blast load for early assessment in design procedures."

— One such type of by-product from the iron smelting industry is iron slag, which is formed from the blast-furnaces of iron industry. This blast furnace slag is used to make a cementitious material by grinding it into a fine powder, which is called Ground Granulated Blast Furnace Slag or GGBS. The same blast furnace slag is used to make a glassy granular product (GBFS) which can be used as fine aggregate. GGBS has cementitious properties and can be very useful in the design and development of high quality cement paste/mortar and concrete. GGBS cement is accessorial to concrete, within the concrete manufacturer's batching plant in conjunction with Portland cement, aggregates and water. Growing ecological limitations to the use of sand from river beds leads to search for alternatives mainly near the larger urban areas. This has brought in brutal strains on the accessibility of sand forcing the construction business to look for substitute building materials without compromising the strength criteria of concrete. Granulated blast furnace slag is one of the promising sustainable solutions as they are obtained as solid wastes generated while production of iron. Hence it eliminates the solid waste disposal problem and other ecological issues. Present experimental work explores the opportunity of using GBFS as replacement of natural sand in concrete and GGBS as replacement of cement in concrete. In our experiments it was found that both GGBS can be used successfully to partially replace cement in concrete by 55%.