Research Papers/Topics in Civil Engineering

Dimensional And Regression Models Of Rainfall Intensity-Frequency Relations

 ABSTRACT In the design of flood control structures, there is need for rainfall intensity estimation for design discharge computation. To make the rainfall intensity values easily available in south-east and south-south Nigeria, this research developed rainfall models. Dimensional and Regression analyses were used to produce models of rainfall intensities. The dimensional models are dimensionally balanced as opposed to the other models which are based o...

Developing Rainfall Models For Enugu City

ABSTRACT  Suitable rainfall models of Enugu City is presented based on the statistical method of least squares. A total of 23 rainfall models are developed in all and grouped into 2 sets. The first set contains 4 rainfall models which represents an inverse relationship between rainfall intensities and durations for specified return periods of 1.1, 2.2, 5.5 and 11 years. High and positive values of coefficients of correlations of 0.9735 to 0.9885 were ob...

Comparative Analysis And Prediction Of Remediation Rates Of Microbes In Simulated Polluted Soil Samples

ABSTRACT  The study compared and predicted the remediation rates of microbes using the rate removal of Total Petroleum Hydrocarbon Content (TPHC) of a crude oil polluted land. This  was done using field experimental data generated from the soil of the Federal University of Technology Owerri Research Farm in Imo State, Nigeria. The soil was artificially polluted in the laboratory with crude oil - Bonny light - with specific gravity of 0.8323. Petroleum contaminant present in the...

Buckling And Vibration Analyses Of Line Continuum Using 6 X 6 Stiffness Matrices

ABSTRACT This research work presents buckling and vibration analyses of line continuum using 6 x 6 stiffness matrices. The study used six term Taylor McLaurin’s polynomial series shape function and the stiffness matrices were developed using energy variational principle. Two deformable nodes were considered at the centre of the continuum which brings the number of deformable nodes to six. The six term Taylor McLaurin’s shape function was substituted into strain energy equation and th...

A Study Of Box Girder Behaviour Based On Extensional And Bending Plate Theories

ABSTRACTThe thesis deals with the study of box girder behaviour under load and determines the deflection and membrane stresses which arise a consequence of loading

A Model For Management Of Neurodegenerative Disease The Case Of Huntingtons Disease

ABSTRACTMutant huntingtin gene can bind to transcription factors, resulting in reduced levels of acetylated histones.

A High Resolution Analysis Of Spatiotemporal Variations Of Geomagnetic Field Using Parallel Computing

ABSTRACT This work presents a high resolution analysis of spatio-temporal variations of geomagnetic field using parallel computing. Geomagnetic field diurnal and hourly variation have been used extensively to study extant and emerging geophysical phenomena. Although, geomagnetic field variations occur even on nanosecond basis, however, to date, algorithm development and computing hardware architecture limit the resolution of monitoring solar quiet (Sq) daily variation to hourly and regi...

Buckling Analysis Of Plates Subjected To Biaxial Forces Using Galerkin’s Method

ABSTRACT This work studied the buckling analysis of plates subject to biaxial forces using the Galerkin’s method. Twelve boundary conditions were considered. The plate deflection equations were obtained using the polynomial series, and from the plate deflection equations, the expression for the critical buckling loads of the different plate boundary conditions were obtained for different aspect ratios, ∝ using the Galerkin’s functional. The aspect ratios, considered throughout...

Buckling Analysis Of Isotropic Rectangular Plates Using Ritz Method

CHAPTER ONE INTRODUCTION 1.1 BACKGROUND OF STUDY Buckling analysis of isotropic rectangular plate has been a subject of study in solid structural mechanics for more than a century. Many exact solutions for isotopic plates have been developed. Steel rectangular plates are widely used in buildings, bridges, automobiles, and ships. Rectangular plate has width size comparable to size of their lengths and so is modeled as two - dimensional plane members unlike beams and columns. Un...

Non Linear Analysis of Isotropic Rectangular Thin Plates Using Ritz Method

ABSTRACT   This research work presents Nonlinear Analysis of Isotropic Thin Rectangular Plates using Energy Principle (Ritz method). Isotropic thin Rectangular plate having different twelve boundary conditions were analyzed and these boundary conditions were formed by combination of three major supports – Clamp, C; Simply supported, S; and Free, F. With this combination, the twelve boundary conditions analyzed include: SSSS, CCCC, CSCS, CSSS, CCSS, CCCS, CCFC, SSFS, CCFS, SCF...

CORROSION INHIBITORS FROM PLANT EXTRACT AND TEREPHTHAL AMIDE DERIVED FROM WASTE PET BOTTLES FOR MILD STEEL IN ACIDIC MEDIUM

ABSTRACT Powdered Cassia Siamea leaves were investigated as a possible corrosion inhibitor for mild steel in 2 M HCl. Terephthal amide obtained from depolymerizing waste PET (Polyethylene terephthalate) bottles through aminolysis using mono ethanol amine (MEA), served as an additive to improve the efficiency of the powdered leaves. The plant inhibitor was prepared by dissolving 1.5 g of the powdered leaves in 300 ml of 2 M HCl and boiled for 3 hours. Corrosion rates of the steel samples...

Effectiveness Of The Treatment Of Fine-Grained Lateritic Soil Using Sugarcane Bagasse Ash (Scba) For Use In Modern Day Construction

ABSTRACTSugarcane as an agricultural product is a readily available source of food for its sugar content. However, Sugarcane Bagasse Ash (SCBA) is the bi- product formed at sugar industries from the burning of sugarcane after the sugar content has been extracted. Sugarcane Bagasse Ash (SCBA) is a fibrous waste product containing mainly aluminum and silica, calcium ions to produce calcium aluminate hydrate (CAH) and calcium silicate hydrate (CSH) shown in the pozzolanic reaction below.Ca2+ + 2...

ANALYSIS OF PRE-CAST WAFFLE SLAB USING YIELD LINE AND RANKINE GRASHOFF THEORIES

ABSTRACT Failure in pre-cast waffle slabs can be attributed to factors like analytical error, poor handling during transportation and placement which factors often lead to partial/total failure of slabs. The conventional method of analysing waffle slabs focuses on the ribs, while the slab portions at the top are avoided. This has led to under reinforcement and subsequent failure of the slab portions that are usually in direct contact with loads. In this study, a method that incorporates...

EFFECT OF CRUDE OIL CONTAMINATED SAND ON THE ENGINEERING PROPERTIES OF CONCRETE

ABSTRACT A considerable fraction of sand in Niger Delta Area of Nigeria is contaminated with crude oil. The contaminated sand is largely utilised by local contractors for the production of concrete. However, there is need to establish its suitability in concreting. Previous works have centered on hardened uncontaminated concrete in crude oil environment but not on concrete made with Crude Oil Contaminated Sand (COCS). This research was designed to evaluate the effect of COCS on some eng...

ANALYSIS OF PRE-CAST WAFFLE SLABS USING YIELD LINE AND RANKINE GRASHOFF THEORIES

ABSTRACT Failure in pre-cast waffle slabs can be attributed to factors like analytical error, poor handling during transportation and placement which factors often lead to partial/total failure of slabs. The conventional method of analysing waffle slabs focuses on the ribs, while the slab portions at the top are avoided. This has led to under reinforcement and subsequent failure of the slab portions that are usually in direct contact with loads. In this study, a method that incorporates...


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