Applied Research Journal
Volume:3 Issue: 1, Jan 2017

In this paper, different end connection types for steel beams with I shape have been investigated to show how they affect the lateral-torsional buckling (LTB) behavior and the critical buckling load capacity of the beams. For this purpose, an elaborated finite element model has been prepared. In this model, a quadrilateral shell element with eight nodes and with six degrees of freedom per node is used to simulate beam web and flanges. The lateral torsional buckling strength, for a single span beam subjected to two point loads located at thirds of beam span, has been estimated using an Eigen analysis with subspace algorithm. The proposed finite element model has been verified based on comparison with an experimental work. Then, the model adopted to study effects of different connection types and their details on lateral-torsional buckling of beams. Finite element results indicate that only connection type, simple or rigid, has a significant effect on lateral torsional buckling of beams where it has been found that beams with rigid connection have strength up to 3 times that of the corresponding beams with simple connections. Finite element analysis also indicates that different details of rigid connections, namely welded flange, bolted flange, unstiffened end plate, and stiffened end plate, have insignificant effect on the lateral torsional buckling strength of beams with rigid connections.

Educational institutions seeking to create a suitable environment for students in schools to achieve required maintenance of school buildings. The concept of quality includes many names and multiple forms but the real goal get the product conforms to requirements. The purpose of improvement and access to the best in terms of (cost and time) must access to the system are his followers to get to the desired objective. Have direct access to the researcher on the reality of the school buildings during the years (2012- 2016) found weakness in the maintenance of school buildings and operations be working director does not meet the requirements specified. Researcher believes necessary to prepare a management system for quality improvement process determining factors influencing effectively on quality and distribution factors to activities within multiple departments tasks in the Directorate-General for Education Baghdad''s Karkh third. The establishment of system proceeded researcher to view direct the visit and follow up on maintenance operations in schools and studying the literature on the subject of quality. Conducted a questionnaire in the Director-General for Education Karkh third and distributed to a selected sample and using statistical methods were selected important factors affecting the quality of maintenance of buildings. Researcher used Pareto analysis to identify the most important factors and arrange them according to the impact of each factor; according to Pareto analysis Researcher believes that just a few factors that have a big impact on the quality of maintenance of buildings. Administrative system formulated in the form of a flowchart distribution of tasks for each department specialist maintenance, From the perspective of the researcher to follow the administrative system can get an improvement in the quality of maintenance and creation of an environment in accordance with the specific requirements.

The objective of this action is concentrated on employ cheap , available and environmentally clean adsorbent such as waste glass which is widely used in our daily life for the removal of methyl violet (MV) 2B from aqueous solution, that’s resulted from widely number of industries by adsorption process. The characterization for the prepared adsorbent such as X-ray diffraction (XRD), scanning electron microscopy (SEM), BET surface area and Fourier transform infrared (FTIR) spectroscopy was achieved. The experiments were carried out to measure the adsorption capacity as a function of contact time, initial concentration (20-80mg/L), pH (4-10), adsorbent dose (0.5-10 g/L), contact time (30-180) min, and particle size of the adsorbent (75,150)Mm were studied. Adsorption isotherms were fitted with the Langmuir and Freundlich models were found to be more exemplified to the experiments with high correlation coefficient. The results showed that the variation of particle size of waste glass powder has a slight effect on the removal of (MV) and higher percentage of dye removal by using waste glass was observed with particle size of 75 m, pH 4, at room temperatures for 30 min, 10 g adsorbent dose and 60 mg/L initial dye concentration is 98.7%.

When a soil of low bearing capacity extends to a considerable depth, piles are commonly used to transmit vertical and lateral loads to the surrounding soil, there are some structures where the piles primary function is to transfer large lateral loads to the ground such as bridge abutments, retaining walls, and structures subjected to wind–earthquake loads. In this study a small scale 10 model tests were performed to evaluate the behavior and performance of laterally loaded (Plumb and finned) piles in layered dry sand from Karbala city, Iraq with three layers of relative densities (􀜦􀯥 % = 70 %, 50 % and 32%) from bottom to top of the testing tank. The model tests were carried out on single and pile groups with configurations that consist of 4 and 5 piles spaced at s/d = 3 and 6 for plumb piles and s/d = 4 and 6 for finned piles. The performance of individual finned piles shows a gain of 76 % in the ultimate lateral capacity over the plumb ones, for pile groups the use of finned piles shows a significant gain in the lateral resistance. Increasing the spacing between piles in groups of the same category show an increase in the group efficiency, also increasing the piles number within the group using group of five piles (G5 pattern) will increase the Ultimate lateral resistance of the pile group.

In this paper a numerical study is presented with the aim of evaluating the
performance of using curved stator blade on Vertical Axis Wind Turbine (VAWT). The flow over the Savonius turbine was assumed to be twodimensional (2D), viscous, turbulent and steady. Simulations were performed in a Computational Fluid Dynamics CFD software FLUENT, using Reynold’s Averaged Navier-Stokes Equations (RANSE) solver with unstructured mesh. Turbulence was modeled with the k-e model. The effects of varying Reynolds number and stator blade have been investigated. The static torque values of the rotor have been measured by experiments and calculated by numerical analysis, and finally they have been compared. The best results have been obtained by means of the rotor with curtain. This simulation determines the aerodynamic behavior of the rotor and stator blade. Torque coefficients have been investigated in this present research work by measuring the pressure distribution on the blade surfaces at various wind angles. For the turbine, the numerical results of pressure and torque were compared for the two cases. From the Simulation data it can be concluded that the torque and performance of VAWT increase with stator blades.