Comparative Study of Moment resisting frame system and dual shear wall-frame system using ETABS 2016

The purpose of this report is to determine the effectiveness of using shear walls with Moment-resisting frames by modeling two bare frame structures. The first model is a combination of bare frames and shear walls, and the second model is without shear walls, and analyzing them statically (LATERAL FORCE METHOD) and dynamically (RESPONSE SPECTRUM METHOD) using ETABS 2016 software, and comparing the results of base shear forces, displacements and vibration modes, in order to form a comprehensive understanding of the proper use of shear walls. The report raises critical questions regarding the key factors of resisting seismic forces on similar structures, where rigidity or ductility can play opposing roles in the overall structure resistance.

EXPERIMENTAL STUDY OF THE BEHAVIOUR OF SMALL WIND TURBINE DURING THE STARTING PERIOD

This research shows that the design of wind turbine blade for the best production of energy produces a turbine with a problem of start-up. The study focused on ways to improve the process of the small wind turbine start-up at the low wind speed with the stability of the pitch blade angle, and study the behavior of the turbine during the stage of angular acceleration after the start-up until the turbine reaches the speed of rotation that enable it to produce the energy.

Improvement the performance of the two masses electromechanical system by using Proportional Integral Derivative controlled

This research aims at showing the characteristics of electromechanical system and present influence of regulator factor in feed back loop (electrical methods of control ) for reducing these dynamic loads by using the optimal value of the factor without reduction of quick operation .

The Effect of Axial Force on the Behavior of Bolted flush End-plate single-sided beam-to-column moment connections

Flush end-plate beam-to-column joints often subjected to a combination of bending and axial forces .The level of axial forces in the joint may be significant in case of: sway frames under horizontal loads, pitched roof portal frames and irregular frames.. Many of design codes neglect the effect of axial force in the connection analysis as it is usually low. Eurocode 3 limits the axial force acting on the joint to 10% of the design plastic resistance of the connected member cross section to apply component method. The objective of this paper is to discuss the behavior of flushend-plate connections under a combination of bending and axial tension or compression forces For the nonlinear finite element analysis the modeling process was carried out using CATIA computer program. The results of the finite element analysis of the connection showed that by applying the tensile axial load of the beam into the connection, the ultimate bending capacity of the connection will decrease. On the other hand, by applying compressive axial load of the beam to the connection, the ultimate bending capacity of the connection will increase at first; but after the buckling of the compressive flange of the beam takes place, the total capacity of the connection tends to decrease.

Simulation experimental results in Studying of analysis and design of beam column connection in the precast concrete framed structures

Our subject contains studying criterions which ensuring a durable serving of concrete frame joints, and then choosing two connections according to its deployment and the availability of its arithmetic relations and easy to be prepared from local materials, and discuss experimental results of the resent study which allow us to achieve the next part of our research,which is a structural designing programme by visual basic language to serve the work in order to be fast and precise. the last part of the subject is comprising a number of actualizations which confirm that the process of programming is correct, and then compare the results of experimental programs and code with our programme results to achieve many important ameliorations on this programme to become more easily and better.

Structural Analysis of deflection for members under bending moment in that casted in structure workshop circumstances in Syrian Arab Republic

The equipment of reinforced concrete by using native materials (cement-aggregates-steel) in ideal conditions help us producing concrete that consummate the Syrian Arab Code conditions, but these are not found in Engineering Structure workshop that have affection of characters used materials in one hand, and these behavior in the common work with steel –Structural behavior of Engineering member espial in serviceability stage, that may be expose accepted limits in other hand . So it is necessary to correct the Syrian Arab Code's formulas of deformation and finding suitable mathematical factors and formulas that insure structural safety for reinforced concrete members under bending moment that casted in structure workshop circumstances in Syrian Arab Republic.

Studying the cation distribution in the Co0.6Zn0.4 –ferrite using ESR

The ESR signal of the Co0.6Zn0.4Fe2O4 ferrite system was recorded at room temperature. The experimental magnetic moment value was estimated by means of integrated intensity of ESR signal and its maximum position. It has been used some theoretical relations were used to estimate the values of magnetic moment of the studied ferrite. The cation distributions between tetrahedral and octahedral sites were established from the values of magnetic moment.In addition, the lifetimeof energy level was determined.

General Formulation of the Definition Relations wth the Elastic Curve’s Unknowns for Beams

Through the last centuries Scientists and Researchers have created analytic and geographic multi-methods and formulas for the definition of elastic curve’s unknowns of beams. We have seen that most of these methods had matched in their end formulas, while they only differed by the analytic basis for the differentiating of these formulas, that their introductions depended on different physic expressions and mathematic relations. This scientific work contains a concise preview for the definition relations and methods of elastic Curve’s unknowns of beams available, so that the expression about these in an easy and collective expression with agreement of the depended analytic method by the Researcher. That can avail of the academic job on the first hand, and it helps the structural analyzer choose the proper and easier device for his structural analysis for the definition of elastic Curve’s unknowns of studied structural system.

Design of the mid-Transverse Section in Shiphull

The mid-transverse section is considered one of the significant sections in the shiphull, because it exists in the middle of its calculated length, where the bindings moments reach the maximum, in consequence the hull strength can be determined through the strength of this section. Its design process includes the determination of the dimensions of plats and different framing beams and considered one of the important stages in the hull design process. This research includes the estimation of calculated values of binding moments, inertia and resistant’s moments of this section area, initiated from the providing conditions of critical strength and fatigue strength. It also includes, the formals used for the determination of longitudinal elements dimensions through the transverse thicknesses and metal distribution type among them. The longitudinal strength of the hull was evaluated according the perpendicular and tangential stresses.