Finite Element Method Analysis Applied to the Study of a Corner Joint in Reinforced Concrete Structures

The principal objective for this work was to extend the field of application of FEM to space frame beam-column connections under static loading and with lateral displacements. A four-storey building was modelled under static load condition. Horizontal and vertical structural elements were designed according to Eurocode 2. In order to understand the behavior of the external node made by under column, two beam and upper column, two models using correct boundary condition and nonlinear behavior of materials have been done using Abaqus Software The analysis was performed on an interior and an exterior joint models each in two conditions: unconfined and confined joint varying the distributions of number of stirrups for the beam reinforcement and the column reinforcement .A sup structural model to submit to numerical analysis have been performed, the Concrete Damage Plasticity model (CDPM) has been chosen for fit the nonlinear behavior for the concrete and the elastoplastic model has been adopted for the nonlinear behavior for the reinforcement (stirrups, longitudinal and vertical bars). The models were then verified against already existing and validated analytical results and results of experiments conducted on specimens.

Finite Element Method Analysis Applied to Different Foundations Structures Systems

In the conventional static analysis of building frames, the base is idealised on rigid supports and the building is subdivided into three parts namely, the superstructure, the foundation and the ground soil, before design. In real life situations, the soil underneath the building undergoes deformations which may alter the performance of the structure. In this paper, it is studied the effect of soil type and foundation type on the response of a building frame system with both fixed base and flexible base. The Winkler model of soil-structure interaction is adopted to study the influence of soil flexibility and foundation rigidity on a 4 storey RC building with a regular plan resting on three types of soils namely, the light peat marshy ground, wet clay and medium gravel with fine sand. Three types of foundations are considered in the study: isolated footings, tied foundation and the raft (with and without overhangs) foundations. Winkler model is developed using springs by Finite Element Method in SAP2000. The settlement, the bending moment, the shear force and the axial force are the parameters placed forth for the comparative study. Results obtained reveal an increase in the response of the structure with respect to the soil flexibility and foundation rigidity.

Experimental Analysis of Pond Ash on the Property of C-25 Concrete

Due to high material consumption, infrastructure construction is rapidly becoming a serious problem in this world, particularly in developing countries. Concrete is produced in greater amounts, as a result of this aggregate shortage The focus of this research was to see if ash can substitute for fine aggregates in concrete The sample was collected from the Ayka Addis mill pond ash.The experimental laboratory of this research work was used to conduct tests on gradation, specific gravity, unit weight, moisture content, silt content, and water absorption, as well as workability, density, and compressive strength. The workability of each mix was measured before the concrete was cast, and the slum was 25 to 50mm. Furthermore, for accurate testing of density and compressive strength, cubes (150mm x 150mm x 150mm) of 7% to 30% pond and 5% to 30% of ash density, which were of concrete, were prepared. Up to 10% of the total mix, the concrete was found to have compressive strength of 34.75 N/sq.m.For this reason, fine aggregate at 10% replacement is the best aggregate to use.

Pattern Recognition using Support Vector Machines as a Solution for Non-Technical Losses in Electricity Distribution Industry

Contending with Non-Technical Losses (NTL) is a major problem for electricity utility companies. Hence providing a lasting solution to this menace motivates this and many more research work in the electricity sector in recent times. Non-technical losses are classed under losses incurred by the electricity utility companies in terms of energy used but not billed due to activities of users or malfunction of metering equipment. This paper therefore is aimed at proffering a solution to this problem by first detecting such loopholes via the analysis of consumers’ consumption pattern leveraging Machine learning (ML) techniques. Support vector machine classifier was chosen and used for classifying the customers’ energy consumption data, training the system and also for performing predictive analysis for the given dataset after a careful survey of a number of machine learning classifiers. A classification accuracy (and subsequently, class prediction) of 79.46% % was achieved using this technique. It has been shown, through this research work, that fraud detection in Electricity monitoring, and hence a solution to non-technical losses can be achieved using the right combinations of Machine Learning techniques in conjunction with AMI technology.

Present to Future Antennas for Wireless Communication

Antenna is an essential part of the human life in present world and will be indistinguishable part of the life in coming days. Various generations of antenna designs are required to enhance data rate from 2 kbps to 1 Gbps and higher. Even uplink and downlink delays are dependent on the mobile generations. Modern wireless communication works on the low latency and high data rates for the VOD and BOD services. As, the population of mobile phones demand is growing exponentially, so the higher frequency bands are in demand and compactness of the devices is the prime object along with reliability of the signals/data. Various generations of the antennas are available and have enhancement in applications as well as enhancement in the data rates. Therefore, SISO, MIMO, arrays, MIMO-arrays are available for specific requirements. A thorough literature review has been done to focus the light on the antenna technologies

Remote Control, Protection and Monitoring of Pump for Agricultural Purposes

With the increasing pressure on our natural resources and diminishing soil quality, there is a need to make better efforts to conserve them. This project aims to help control the irrigation in a small field. The motor pump set equipped at the field is prone to a variety of operational issues like Power Quality issues, Reverse run of the pump, Irregular Power Supply. Using an ATMEGA Microcontroller equipped with GSM Module for connectivity, this model is able to provide the user with remote control for the motor pump set equipped at his field. Additionally, this model comes with protection schemes for detection of Input Phase Sequence Supply and protection against Over Voltage and Over Current. This system aims to reduce the man power requirement in the field by providing remote or at home control of the pump set applied on the field with cost effective and easy control which can be used by unskilled operators as well.

Enhancement of Power Quality for 15 Level Inverter using Phase Disposition-PWM Technique

With consideration of use of solar, wind and other renewable energy source for industrial applications like electric vehicle drive, train traction and FACTS integration, which demand voltage levels in the range of kilo volts with high power quality, to achieve this high voltage level and high quality of power, a cascaded H-bridge multilevel inverter based topology capable of operating with low harmonic distortion is proposed in the paper. In order to attain low total harmonic distortion (THD), use of phase disposition-PWM technique is proposed in the paper. Giving due attention to both switch count and low THD, the output voltage levels of the multi-level inverter are set at 15 levels. Due to half wave symmetry the even order harmonics for proposed system become zero and the lower order harmonics reduces which is shown in tabular from. Due to reduced switch count and low THD the overall system become more efficient and effective. The effectiveness of the proposed control strategy has been verified using MATLAB simulations. Simulation is done for both symmetrical as well as asymmetrical multilevel inverter topology. It is observed that quality of the output voltage waveforms of the multi-level inverter (MLI) is as per the IEEE std 519 specifications. For symmetrical reduced switch fifteen level inverter the THD is 4.42% and for asymmetrical topology THD is 4.59% for the output voltage waveform.