Research Papers/Topics in Civil Engineering
Large Deformation Analysis Of Continuum Compliant Mechanisms
Compliant mechanisms (CMs) above the traditional rigid-body mechanisms have the sole merit of no relative moving parts hence preventing any form of wear, backlash, noise and need for lubrication. Its applications are versatile and fully domicile in such sectors as medicine, robotics, aerospace, biomechanics, food processing and automotive industries to mention a few. The Pseudo Rigid Body (PRB) equivalence of compliant mechanisms have been the conventional approach used by earlier resear...
Experimental And Analytical Investigation Of Soil Cutting
INTRODUCTIONThe objective of this work is first to determine experimentally the horizontal and vertical force components of the operative forces during soil cutting. Since previous work in soil cutting had been empirical and involved curve fitting techniques therefore the second objective is to predict these horizontal and vertical force components. In order to achieve these objectives a special apparatus was designed and fabricated for experimentation. It comprises the soil bin, the hor...
E-Nose Odour Recognition System For Produce Quality Assesssment
ABSTRACTThe march of globalization and international trade has brought into focus the need for the measurement of quality as an essential element for customer satisfaction. Earlier approaches to quality control based mainly on end product testing are no longer considered adequate enough as quality must now be assured at every developmental or production stage to guarantee quality product at the end. Thus, non-subjective and non-destructive methods are receiving attention especially wher...
Combined Free And Forced Laminar Convection In Incuned Wide Rectangular Channels Heated From Below And Cooled From Above
ABSTRACT The steady-state two-dimensional problem of combined free and forced laminar convection with upward flow in inclined rectangular channels heated from below and cooled from above, has been investigated by numerical, parameter perturbation and experimental methods. The results indicate that for air (Pr = 0.73), maximum heat transfer rates occur at the hotwall for inclinations between 30° and 60° to the horizontal. In addition, the perturbation analysis predicts the occurence...
Analysis Of Traffic Congestion In Abakpa–Nike Road Network Intersections
ABSTRACTAbakpa-Nike is notorious for chaotic traffic due to driver's indiscipline and poor roadnehvork. This study was therefore undertaken to determine the level of traffic congestion atfour major intersections: The Abakpa-Nike- Trans-Ekulu T-Junction; Abakpa-Nike LibertyJunction; Afia Abakpa Junction and Nowas Roundabout Intersection in Abakpa-Nike area ofEnugu, Enugu State. These intersections are notorious for high traffic volumes. Vehiculartraffic volume were measured to quantify overall...
A Hybrid Virtual Force Field Model For Autonomous Mobile Robot Navigation
ABSTRACTThis work improves upon the Potential Field Method (PFM) for the navigation of autonomous mobile robots, through the introduction of a new Hybrid Virtual Force Field (HVFF) concept. The HVFF concept integrates the virtual force field (VFF), which is based on the principles of artificial attractive and repulsive potentials, with the virtual obstacle concept (VOC) and the virtual goal concept (VGC). In particular, the specific challenges resolved by the HVFF include the local mini...
Heat Transfer By Steady Laminar Free Convection In Triangular Enclosures
ABSTRACTTwo Dimensional Laminar Free Convection in a fluid contained in a long horizontal right triangular enclosure has been investigated using numerical techniques and an experimental study. The geometry of the enclosure is such that the base is assumed horizontal while the vertical height is adiabatic. Motion in the region is set up by heating the hypotenuse while cooling the horizontal wall. This model simulates heat transfer problems associated with pitched-roofs with suspended ...
Bearing Capacity and Critical Normal Stress Distribution of Soils by Method of Variational Calculus
ABSTRACTA ma thema t i c a l t-echnique is h e r e b y advanced f 01: i n v e s t i -c j ; ~ t - it13 the bearing c a p a c i t y and a s s o c i a t e d normal stresst l I :-; tLribut.ion il t- C a i l . u r e of s o i l f o u n d a t i o n s .'I'hc stab1 1 i t.y e q u a t i o n s are o b t a i n e d using the L i m i l:i,:clu.i l i b r i u m ( 1,E) c o n d i t i o n s . The c o n d i t i o n s of v e r t i c n 1 ,I I ~ J J - i z o n t aal .n d r o t a t i o n a l e q u i l i b r i a are tra...
REINVIGORATION OF PROJECT WORKS IN NIGERIA THROUGH COMPULSORY GREEN CONSTRUCTION, (Case Study of Lagos State)
STRACTGlobal warming is a serious problem facing the world today as well asthe world in the future if left unchecked. In order to stop or avert thisproblem, our today’s society must change her ways, by learning howto alter what they do or use in order to be less harmful to theenvironment. Making our buildings and general structural facilities“green” would greatly impact this problem. There are many ways forthis to be done and more ways are being developed rapidly. As thesenew developmen...
Mathematical Models For Sandbag Checkdam.
ABSTRACT The study was aimed at developing mathematical models on the hydraulic performance of Sandbags as Checkdam for erosion control. Pilot studies were carried out at two sites. Site ‘A’ was a natural gully at a location in Ezinihitte-Mbaise, Imo State while site ‘B’ was an artificial channel excavated on the slope of Otamiri River at Federal University of Technology, Owerri. Artificial runoff was simulated into site ‘B’ by pumping water from Otam...
Mathematical Models For Sandbag Checkdam
ABSTRACT The study was aimed at developing mathematical models on the hydraulic performance of Sandbags as Checkdam for erosion control. Pilot studies were carried out at two sites. Site ‘A’ was a natural gully at a location in Ezinihitte-Mbaise, Imo State while site ‘B’ was an artificial channel excavated on the slope of Otamiri River at Federal University of Technology, Owerri. Artificial runoff was simulated into site ‘B’ by pumping water from Otam...
Investigation Of The Structural Characteristics Of Lime-cement Concrete
ABSTRACT This work investigated the structural characteristics of lime cement concrete using 30 selected mix ratios. The properties studied include, compressive strength, flexural strength, splitting tensile strength, shear strength, poisson ratio, modulus of elasticity, and modulus of rigidity. A total of 360 concrete cube specimen, 360 concrete prototype beam specimen, and 360 concrete cylinder specimen were cast and cured in open water tanks. 3 specimen were cast for each mix pr...
An Analytical And Autographic Method For Highways Geometric Design
ABSTRACT The geometric design of highways requires a large number of iterations and repetitive tasks of analysis and drafting in order to prepare plan, profile and cost estimate.
Performance Evaluation And Redesign Of Waste Stabilization Ponds For The Treatment Of Wastewater In Ongwediva
ABSTRACTThe existing Ongwediva Waste Stabilization Ponds have had several problems in their operations over the past years. Thus, the treatment performance of the waste stabilization ponds was assessed in terms of the reduction efficiency of some physical, chemical and biological pollutants of importance. Data were collected daily from May to June 2017 and analyzed for both raw and treated wastewater. Results of these investigation showed that the average effluent concentrations of BOD, DO, T...
An Empirical Computational Model For The Correction Of Refraction Errors In Photogrammetric Restitution
ABSTRACT Photogrammetric Refraction is one of the major causes of systematic errors affecting the accuracy of maps compiled from aerial images. It has to be eliminated so as to attain the goal of the best results that the technology of photogrammetric mapping is capable of. Many researchers have devoted substantial efforts to develop a number of analytical formulas to remove the effect of refraction. However, these formulas suffer from certain limitations, such as: (i) inconsistent valu...