29 Articles Published

1. POLLUTION BY LEACHATE AND GAS FROM IMPROPERLY DESIGNED LANDFILL : A CASE STUDY

Authors: HAWAZEN LAMFON , TURKI M. AL-ABOUD

Abstract: For effective preservation of environment and required protection of groundwater, the Municipality of the Holy Capital (Makkah), Kingdom of Saudi Arabia plans to appropriately and properly close the old landfill at Muassim area in Makkah with a particular synthetic cover layer that prevents rainwater from reaching the very inside of the landfill and mixing up with its components. This affects subsequently the quality of the groundwater in the nearby valleys (Wadis). Furthermore, for safeguarding the air environment, the said Municipality intends to construct a network for the collection of gases and considering the possibility of making use of it in energy production. This paper comprises the results of the quality of both underground water and atmosphere near Muassim Landfill

Keywords: construct, network,collection environment, Municipality, intends

Pages: 1 - 9 | DOI: 10.15224/978-1-63248-012-5-60

2. TEMPERATURE CONTROL OF A SHELL AND TUBE HEAT EXCHANGER USING PID ALGORITHMS

Authors: I.THIRUNAVUKKARASU , SATHEESH BABU.R , SHREESHA.C, V.I.GEORGE

Abstract: Integral windup problem and its accommodation in the field of process control, especially for the PID controllershas been under discussion for nearly about five decades(Since 1960) with limited structures and modifications in it. In this paper two control methodologies are analyzed mainly focusing on the control effort reduction under various uncertainties of a process. Also as a case study the Internal Model Control (IMC) and Ms based Two Degrees of Freedom (2DOF) PID controllers were designed and implemented for a shell and tube heat exchanger using MATLAB® in the lab environment.

Keywords: persistent, difficulties, control methodology

Pages: 10 - 14 | DOI: 10.15224/978-1-63248-012-5-61

3. PARAMETRIC STUDY OF WEB OPENING DIMENSIONS ON HYBRID REINFORCED CONCRETE T-BEAMS

Authors: JONIE TANIJAYA

Abstract: This paper presents a nonlinear analysis of simply supported hybrid R/C T-beams with rectangular openings. The results from a nonlinear analysis using the finite element method, were substantiated by test results from three hybrid T-beams, partially conctructed of light weight concrete. An opening was provided in the web of the beams, the pure bending region, the high shear region, and the high flexural-shear region, respectively. The available experimental results were compared to the theoretical analysis. Good agreement is shown between analytical and the experimental results. An extensive parametric study was conducted to predict the effect of the openings on the behaviour of such beams. Increasing the opening width decreases ultimate load for beam with high bending opening. However, beam with pure bending and high shear opening show no significant difference with the presence of opening. Variation in opening width has significantly affected the deflection of beam with bending openi

Keywords: web opening, hybrid R/C, normal weight concrete, light weight concrete, pure bending, high shear, flexural-shear

Pages: 15 - 19 | DOI: 10.15224/978-1-63248-012-5-62

4. PREDICTION OF SPREAD FOUNDATIONS’ SETTLEMENT IN COHESIONLESS SOILS USING A HYBRID PARTICLE SWARM OPTIMIZATION-BASED ANN APPROACH

Authors: EHSAN MOMENI , MOHSEN HAJIHASSANI , RAMLI NAZIR

Abstract: Proper estimation of foundation settlement is a crucial factor in designing shallow foundations. Recent literature shows the applicability of Artificial Neural Networks (ANNs) in predicting the settlement of shallow foundations. However, conventional ANNs have some drawbacks: getting trapped in local minima and a slow rate of learning. Utilization of an optimization algorithm such as Particle Swarm Optimization (PSO) can greatly improve ANN efficiency. In this study, a PSO-based ANN predictive model of settlement is established. A database comprising 80 footing load tests on cohesionless soils compiled from the literature was used for training the predictive model. For training purposes, footing geometrical properties (length, width, and depth of embedment) as well as soil properties (friction angle, stiffness, and effective stress below footing) were used as inputs to the model while the settlement was set to be the output of the model. Close agreement between the settlements predicte

Keywords: Spread foundation, Settlement, Artificial Neural Network, Particle Swarm Optimization, cohesionless soils

Pages: 20 - 24 | DOI: 10.15224/978-1-63248-012-5-63

5. A DEVELOPED CONTROLLER SOFTWARE FOR COMPUTER AUTOMATION OF A TRIAXIAL TESTING SYSTEM

Authors: TANAY KARADEMIR

Abstract: A controller software with user interface was developed in Visual Basic that provides user friendly interfaces to control test phases and to enter input test parameters as well as programming capability to control sophisticated and to run high quality triaxial tests for measuring stress-strength-strain properties of soils in obtaining consistent and reliable results from the performed tests. When designing the controller software to administer the entire triaxial test process, the major variables considered primarily and desired to be controlled during the testing progress were: i) boundary drainage conditions (either drained or undrained); ii) imposed stress path; iii) magnitude of axial deformation; and iv) time rate. The software can consistently control the triaxial system applying either undrained or drained linear stress paths as well as performing isotropically (CI) and anisotropically consolidated (CA) or one-dimensionally (CKo) consolidated tests on soil specimens. Additionall

Keywords: Automated Controller Software, Computer Automation, Triaxial Testing System, Visual Basic Code, User Interface

Pages: 25 - 28 | DOI: 10.15224/978-1-63248-012-5-64

6. A NUMERICAL STUDY OF CYCLIC BEHAVIOUR OF NITI SHAPE MEMORY ALLOY BELLEVILLE WASHERS

Authors: CHANDRA VEMURY , CHENG FANG , MICHAEL YAM

Abstract: This study aims to explore the potential of superelastic/austenitic NiTi shape memory alloy (SMA) Belleville washers for the applications of seismic resisting devices. Employing a sophisticated superelastic-plastic constitutive model for NiTi SMA, a numerical study is performed to investigate the self-recovery and damping properties of NiTi SMA Belleville washers under the action of cyclic compression. A spectrum of geometric configuration is considered, where the effects of varying cone angles and thicknesses are discussed in detail. The effect of friction when two or more washers are stacked in parallel is also studied. Based on the parametric study results, a preliminary design recommendation on NiTi SMA Belleville washers is proposed. The current numerical study can facilitate further developments of viable re-centring and energy dissipating seismic resisting devices such as base isolations and dampers

Keywords: NiTi shape memory alloy (SMA), Belleville washer, cyclic loading, recentring, seismic.

Pages: 29 - 33 | DOI: 10.15224/978-1-63248-012-5-65

7. CORROSION INHIBITION OF MILD STEEL IN 0.5 M HCL USING A HYDRAZIDE DERIVATIVE AS INHIBITOR

Authors: PRAKASHA SHETTY , PREETHI KUMARI P , SUMA A RAO

Abstract: The inhibition behaviour of N'-[4-(dimethylamino) benzylidene]-4-hydroxybenzo hydrazide (DABBH) on the corrosion of mild steel in 0.5 M hydrochloric acid was studied by Tafel polarization technique and electrochemical impedance spectroscopy technique. The inhibition efficiency of DABBH increased with the increase in its concentration and increase in temperature. Polarization study showed that DABBH acts as a mixed type inhibitor and its adsorption on mild steel surface was found to follow Langmuir’s adsorption isotherm. The formation of protective film was confirmed by scanning electron microscopy study.

Keywords: corrosion inhibition, mild steel, Tafel polarization, EIS, acid medium

Pages: 34 - 38 | DOI: 10.15224/978-1-63248-012-5-66

8. COMPARATIVE STUDY ON STRENGTH AND PERMEABILITY OF CEMENT MORTAR USING MICRO AND NANO PARTICLES

Authors: R.NIRMALA , R.SINGARAVADIVELAN

Abstract: Recently, Nano particles have been gaining increasing attention in many fields to fabricate new materials with novel functions due to their unique physical and chemical properties. It has been found that physical properties of mortar, particularly strength and permeability significantly depend on its pore structure. Ultra-fine particles of Nano composites provide more homogenous distribution of hydrated products of concrete. This effect of micro and Nano particles enhances the durability of cement composites as well as the strength. In the present investigation, micro level materials such as Rice husk Ash (RHA) and Marble powder as a replacement of cement and Manufactured sand (M-Sand) quarry dust as a replacement of fine aggregate have been studied. In addition, influence of Nano particles on different properties of cement mortar was investigated with Rice husk ash as a well-known active pozzolano. Nano particles such as Al2O3, Fe2O3 of different percentage (0.5%, 1%, 1.5%, 2%) by wei

Keywords: OrdinaryPortlandCement,Rice Husk Ash, Marble Powder, Nano Materials

Pages: 39 - 52 | DOI: 10.15224/978-1-63248-012-5-67

9. COMPARATIVE STUDY ON STRENGTH AND PERMEABILITY OF CEMENT MORTAR USING MICRO AND NANO PARTICLES

Authors: R.NIRMALA , R.SINGARAVADIVELAN

Abstract: Recently, Nano particles have been gaining increasing attention in many fields to fabricate new materials with novel functions due to their unique physical and chemical properties. It has been found that physical properties of mortar, particularly strength and permeability significantly depend on its pore structure. Ultra-fine particles of Nano composites provide more homogenous distribution of hydrated products of concrete. This effect of micro and Nano particles enhances the durability of cement composites as well as the strength. In the present investigation, micro level materials such as Rice husk Ash (RHA) and Marble powder as a replacement of cement and Manufactured sand (M-Sand) quarry dust as a replacement of fine aggregate have been studied. In addition, influence of Nano particles on different properties of cement mortar was investigated with Rice husk ash as a well-known active pozzolano. Nano particles such as Al2O3, Fe2O3 of different percentage (0.5%, 1%, 1.5%, 2%) by wei

Keywords: OrdinaryPortlandCement,Rice Husk Ash, Marble Powder, Nano Materials

Pages: 39 - 52 | DOI: 10.15224/978-1-63248-012-5-67

10. AN ARCHITECTURE FRAMEWORK OF DESIGN FOR ASSEMBLE EXPERT SYSTEM

Authors: CHEEFAI TAN , L.S. WAHIDIN

Abstract: Nowadays, manufacturing cost is one of the important factors that will affect the product cost as well as company profit. There are many methods have been used to reduce the manufacturing cost in order a company to stay competitive. One of factor that affect on manufacturing cost is the time. Expert system can be used as one of the method to reduce the manufacturing time. The purpose of the expert system is to diagnose and solve the problem of design of assemble. The paper describes an architecture framework of design for assemble expert system that focus on commercial vehicle seat manufacturing industry.

Keywords: design for assemble, expert system, framework, vehicle seat

Pages: 53 - 55 | DOI: 10.15224/978-1-63248-012-5-68

11. MODELING PERFORMANCE OF WATERWAY

Authors: GOLAM SARWAR , MD. BASHIRUL HAQUE , MD. SAIDUL AZAM CHOWDHURY

Abstract: this paper, a Binary Logit model has been developed to evaluate the prospect of waterway in Sylhet city. Data has been collected from the commuters of Tuker Bazar to Bandar Bazar route. Stated Preference (SP) survey method was used and in hypothetical scenarios, river boat with different level of service in terms of boat size, security system, travel time, travel cost etc. was presented to the commuters keeping roadway same as now. Model output shows that travel cost, travel time, boat frequency, comfort, safety, boat capacity and stoppage number control the choice of waterway as well as respondents socio-economic characteristics have great influence on their travel route choice. The developed models provide useful insights and helpful for the policy makers that can lead to minimize traffic congestion by motiving people to waterway.

Keywords: route choice model, binary logit, SP survey, BIOGEM

Pages: 56 - 60 | DOI: 10.15224/978-1-63248-012-5-69

12. CASH FLOW ANALYSIS OF CONSTRUCTION PROJECT USING ARTIFICIAL NEURAL NETWORKS

Authors: GOPAL NAIK M , POOJITHA P.B

Abstract: Cash shortage is one of the most dangerous problems that may appear while projects are in progress. Inadequate cash flows force the companies to take short term or long term loans and in some cases companies end up being bankruptcy. In this study the planned and actual cumulative percentages of cash flows and work progress which are represented using S-curves are used as the basis for analyzing cash flows using artificial neural networks. The planned and actual cash flows are imported to MATLAB and are trained using the developed cash flow analysis model. The results of this analysis will assist the contractor in identifying the down fall of the cumulative percentage of actual cash flows with respect to the percentage of the work completed based on which the contractor can manage the cash flows to maintain work continuity, prevent interruption of project and take precautions to protect the company from being bankruptcy

Keywords: cash flow, cash flow analysis, Artificial Neural Network

Pages: 61 - 65 | DOI: 10.15224/978-1-63248-012-5-70

13. STUDY ON EFFECT OF SIGMOID LIKE CURVES IN PRE-SLIDING REGIME ON BALL SCREW DRIVEN POSITIONING STAGE

Authors: T.H CHIEW , Z. JAMALUDIN , Z. JAMALUDIN

Abstract: Frictional behaviour becomes main study in machining, especially for ball screw driven positioning stage. This paper presents friction behaviour analysis in pre-sliding regime using various mathematical models that produce a sigmoid like curve. In pre-sliding regime, friction behaviour is described while axes moving at relatively low velocity. Furthermore, a smooth continuous curve is needed in the transition between sliding regimes. Generalized Maxwell Slip (GMS) model is known model that well describes the friction behaviour at pre-sliding regime. Sigmoid like function is proposed as a significant parameter in modified GMS. The numerical simulation was performed to show the influences and effects for each sigmoid like curve. The result analysis leads to the development of an adaptive friction compensation model

Keywords: pre-sliding regime, sigmoid, ball screw, friction compensation model

Pages: 66 - 70 | DOI: 10.15224/978-1-63248-012-5-71

14. NONLINEAR MODEL FOR LEAD RUBBER BEARINGS INCLUDING AXIAL LOAD EFFECTS AND LARGE DEFORMATIONS

Authors: BENYOUCEF ABDELKADER , MUHAMMAD E.R , ZERZOUR ALI

Abstract: Several nonlinear models have been developed to simulate the behavior of single isolation bearings. However, these models neglect certain aspects of bearing response behavior. For instance, rubber bearings have been observed to decrease in both elastic and post-elastic stiffness with increasing axial load, and soften in the vertical direction at large deformations. In this paper a macro-element model for lead rubber bearings is developed. The proposed model includes axial load effects and accounts for large deformations. The nonlinearity in the model is modeled via the Bouc-Wen model of hysteresis. Response obtained using the numerical model is shown to be in good agreement with observed behavior in test results on single lead-rubber bearings. A stability analysis on a Lead-Rubber Bearing is then conducted to investigate the accuracy of the proposed macro-element on capturing the effect of axial loads.

Keywords: Lead-Rubber, Macro-element, Axial Load, Large deformations, Bouc-Wen

Pages: 71 - 74 | DOI: 10.15224/978-1-63248-012-5-72

15. THE ROLE OF THERMOGRAPHY IN THE NON-DESTRUCTIVE EVALUATION OF HISTORICAL ARCHITECTURAL SURFACES SOME OBSERVATIONS ABOUT THE METHOD AND ITS PURPOSE

Authors: GASPARE MASSIMO VENTIMIGLIA , RICHARD OLLIG

Abstract: Infrared-Thermography (IRT) has become a supporting tool for the investigation of historical structures and facades. Using the non-destructive testing method for the detection can give a profound knowledge about the current status of the object and the state of decay, about different kinds of discontinuities at historical facades, of construction details and of thermal bridges in the facades. Different case studies of thermographic surveys on some Sicilian monuments are presented and discussed to illustrate how the method can offer applicable information about the investigated objects and demonstrate its reasonable integration into conservation projects.

Keywords: restoration, conservation, monument, historical surfaces, plaster, diagnostics, infrared thermography

Pages: 81 - 85 | DOI: 10.15224/978-1-63248-012-5-74

16. INVESTIGATION OF THE FOAM FILLED FLUID TECHNOLOGY FOR ANTI-VIBRATION DEVICES

Authors: EMMANUEL BROUSSEAU , HAITHEM ELDERRAT

Abstract: In this study, Foam Filled Fluid (FFFluid) technology was investigated for the design of a novel vibration isolator, which is referred to as an FFFluid isolator. This technology relies on the utilisation of both the strain of foam capsules and fluid motion for reducing unwanted vibrations. Such an FFFluid isolator basically consists of compressible elastic particles of foam, mixed with an incompressible fluid while this mixture is contained in a controlled volume. When the FFFluid isolator is affected by vibrations, energy is absorbed due to the elastic strain of the foam. As the foam strain also enables movement of the fluid, this contributes to further energy absorption due swirling and the viscous effect of the fluid. The packaging could also contribute to attenuate vibration through the generated friction between the piston and the cylinder used to contain the FFFluid. Former studies showed that promising performances in reducing unwanted forces can be achieved with shock absorbing

Keywords: FFFluid, Vibration Isolator

Pages: 86 - 90 | DOI: 10.15224/978-1-63248-012-5-75

17. CONDITION MONITORING OF SLOW ROTATING BEARINGS BASED ON BAYESIAN LINEAR REGRESSION

Authors: C.J.H. THIART , P.S. HEYNS , S.A. AYE

Abstract: Preventive maintenance and run to failure techniques of bearing condition monitoring could be quite expensive. The failure could equally be catastrophic thereby leading to the damage of several other components of the machinery. Many bearing studies are done at constant loading and speed and constant conditions. However, this study is carried at varying loads and speed conditions. This paper therefore presents a condition monitoring methodology based on Bayesian linear regression technique which is at varying load and speed condition.

Keywords: condition monitoring, Bayesian linear regression, slow rotating bearings

Pages: 91 - 96 | DOI: 10.15224/978-1-63248-012-5-76

18. DUPLEX COATING OF BLACK CERAMIC COATING FOR COPPER AND STAINLESS STEEL SUBSTRATE

Authors: JAMALIAH IDRIS , MOHAMMAD MAHDI TAHERI , NOOR SABARIAH MAHAT

Abstract: Black ceramic coating has become the important process of metal finishes in solar thermal application. Considerable effort has been expended on developing coatings and absorber materials having high conversion efficiency. This study focused on applying the black ceramic coating using an electroplating process on two types of substrate, which is copper and stainless steel. Black chromium is the best formulation for coating and it is a common use of thermal solar application. The optical properties such as high absorptance, low emittance and metallurgical properties of the combination of black ceramic coating on both substrates are tested and analyzed. It is found that the optical properties of the copper substrate give high absorption, α > 0.95 and low emittance, Ɛ 0.013. Besides that, stainless steel can be the alternative substrate for solar application because it is cheaper than copper. The value of absorptance and emittance for stainless steel is α >0.91 and Ɛ 0.1.

Keywords: Duplex Coating; Black Ceramic Coating; Electroplating; Solar Thermal Application.

Pages: 97 - 101 | DOI: 10.15224/978-1-63248-012-5-77

19. AT CONSTANT SURFACE TEMPERATURE HEAT TRANSFER PERFORMANCE OF SINGLE BLOCKAGES

Authors: BAYRAM ŞAHİN , EYÜPHAN MANAY , KADIR GELİS , VEYSEL ÖZCEYHAN

Abstract: In this study, the effects of equilateral triangular bodies replaced into the channel on heat transfer and flow characteristics were examined numerically. In this research conducted numerically with RNG k-ε method, Reynolds number varied from 5.000 to 10.000. Water was used as working fluid and the constant surface temperature (360K) boundary condition was applied to the bottom wall of the channel. The effects of side length of triangular bodies and Reynolds number were investigated. At the end of the analyses, local and mean Nusselt number, local and mean surface friction factor changes and heat transfer enhancement ratios were given.

Keywords: Bluff body, constant surface temperature, heat transfer enhancement

Pages: 102 - 107 | DOI: 10.15224/978-1-63248-012-5-78

20. NUMERICAL INVESTIGATION OF CONVECTIVE HEAT TRANSFER FROM PERFORATED PIN-FINS

Authors: BAYRAM ŞAHİN , EYÜPHAN MANAY , KADIR GELİS , VEYSEL ÖZCEYHAN

Abstract: In this study, turbulent convection heat transfer and pressure drop from a surface equipped with perforated fins with square cross section were investigated numerically. At constant clearance ratio (C/H=0), the pin-fin spacing ratio in stream wise direction (Sy/D=1.208, 1.944 and 3.4) and the Reynolds number (Re=13.500, 27.500 and 42.000) on heat transfer and pressure drop were examined. RNG based k-ε turbulent model and SIMPLE algorithm were used for governing equations. A constant heat flux of 3200 W/m2 was applied to the base of pin-fins. The results of the heat transfer and pressure drop characteristics with respect to appropriate variables were presented. The heat transfer increased with increasing Reynolds number and with decreasing clearance ratio and spacing ratio. The fin height of H=100 mm, the spacing ratio of Sy/D=1.208 and the Reynolds number of Re=42.000 were better for cooling processes. The best overall heat transfer enhancement was obtained in the case of Sy/D=1.208, C

Keywords: Perforated pin-fin, convective heat transfer, pressure drop, heat transfer enhancement, numerical analysis

Pages: 108 - 114 | DOI: 10.15224/978-1-63248-012-5-79

21. THE USE OF SCC FOR MANUFACTURING PRECAST PRESTRESSED HOLLOW CORE SLABS

Authors: ABDULAZIZ. I. AL-NEGHEIMISH , ABULRAHMAN. M. ALHOZAIMY , AHMED. K. EL-SAYED , MAJED. O. KHANBARI , TAHER SOMAILY

Abstract: Self compacting concrete (SCC) is a new, innovative technology which represents one of the most significant advances in concrete technology during the last two decades. The use of SCC for the production of hollow core slabs (HCS) is proposed to allow for placing shear reinforcement in deep HCS. However, many researchers have expressed concern that SCC could negatively affect the hardened properties such reductions in the modulus of elasticity as well as shear strength and bond between concrete and steel strands. This paper presents development work on the manufacture of HCS using SCC. Preliminary results of short-term flexure testing of full-scale HCS members made using SCC and conventional dry cast concrete (DCC) are presented and discussed.

Keywords: Self compacting concrete, hollow core slab, fresh and harden properties, flexural strength, prestressed concrete.

Pages: 115 - 120 | DOI: 10.15224/978-1-63248-012-5-80

22. THE BEHAVIOR STUDY OF GEOGRID CONCRETE MATS UNDER LOADING USING LABORATORY MODEL

Authors: AFSANEH MOKHTARI , ALIREZA NASERI , RAMIN VAFAEIPOUR SORKHABI

Abstract: Rivers, coastal zones and everglades are always in transit equipment at the crisis. Geogrid concrete mats can be used in applications of appropriate. Concrete mats consist of light weight reinforced concrete beams with high strength which are connected using the geogrid network. Quickly and easily removable, high flexibility and resistance can held together the concrete beams with lower thickness and be able to spread on watery land using crane are the main characteristics of these mats. In this case, condition is prepared to cross military equipment and vehicles on the shallow and marshy rivers. Panel structural design, measurement strain on mats and discussion about time series obtained from panel has been carried out in this research. The results show that the amount of created strain in geogrid was 11%, which was much less than the allowed amount and coherence between the concrete and geogrid was very good because of proper function of the metal wire.

Keywords: geogrid , concrete mat,, strain gauges

Pages: 121 - 124 | DOI: 10.15224/978-1-63248-012-5-81

23. DIAGNOSIS FOR ARCHITECTURAL CONSERVATION A SYNTHETIC REPORT OF A CAMPAIGN OF NON-DESTRUCTIVE AND MINIMALLY INVASIVE DIAGNOSTIC TESTS PERFORMED IN THE CHURCH OF SANTA MARIA DELLE STELLE IN COMISO (RAGUSA, SICILY)

Authors: GASPARE MASSIMO VENTIMIGLIA

Abstract: The paper presents the results of a campaign of non-destructive and minimally invasive tests that were conducted in the church of Santa Maria delle Stelle in Comiso (Ragusa, Sicily), which is the larger church in the Diocese of Ragusa. It includes a summary of the reflections that arose during the preliminary surveys and instrumental tests, and reasons that supported the choice of investigations to be performed and methods to be specifically applied for the consolidation of the architectural structures and plaster layers.

Keywords: restoration, conservation, monument, diagnostics

Pages: 125 - 129 | DOI: 10.15224/978-1-63248-012-5-82

24. EFFECT OF WIND LOADS ON STRUCTURAL DEFORMATION OF COOLING TOWER

Authors: A. D. JOHN , A. GAIROLA , R. FOROUGHI

Abstract: This paper presents influence of interfering structures on deformation of cooling tower due to non-axisymmetric horizontal wind loads. First, the pattern of the wind load distribution on cooling tower has been studied in a wind tunnel on 1:150 geometrical scale models with interfering structures, then deformation pattern of the tower have been studied. Wind loads on cooling tower have been obtained under a simulated wind condition for open country and suburban terrain in a Boundary Layer Wind Tunnel at Indian Institute of Technology Roorkee, India. Experimental results show that, in case of interference for an oblique approach wind, there is a significant increase in the magnitude of the net pressure coefficients on windward meridian. Using the experimental wind load values, numerical linear analysis was performed to find the deformation of the tower. The deformations of the tower have evaluated for both mean and fluctuating wind loads. Due to mean wind loads, the maximum deformation o

Keywords: deformation, fluctuating loads

Pages: 135 - 139 | DOI: 10.15224/978-1-63248-012-5-84

25. EXPERIMENTAL INVESTIGATIONS ON RECTANGULAR BRICK MASONRY COLUMNS RETROFITTED WITH FIBER REINFORCED POLYMERS

Authors: DEEPA A. JOSHI , GOPAL RAI , R. K. JAIN

Abstract: This paper presents an experimental study of rectangular clay brick masonry columns retrofitted with Fiber Reinforced Polymers (FRP). The experimental program involves casting of 15 column specimens out of which 3 specimens were tested as control specimens without application of FRP and 12 specimens were wrapped with FRP strips. The control specimens were tested till failure under uniaxial compressive load whereas the other 12 specimens were subjected to pre-compression load of around 80 to 90 % of ultimate failure load till vertical splitting cracks were observed predominantly. The FRP material used for retrofitting was Carbon (CFRP) and Glass (GFRP). The potential of FRP anchors in enhancing the load carrying capacity of columns was also accessed through the experimentation. The arrangement of FRP strips for all specimens were kept identical to have fair comparison for other parameters. From the analysis of experimental results it can be concluded that the FRP strip wrapping is an ef

Keywords: Masonry Columns, Retrofitting, FRP, GFRP, CFRP

Pages: 140 - 144 | DOI: 10.15224/978-1-63248-012-5-85

26. STUDY OF THE INFLUENCE OF WOOD AGGREGATES ON SAND MORTAR EXTRUDABILITY

Authors: CHAFIKA DJELAL , HASSINA KADA, , YANNICK VANHOVE , ZHI XING

Abstract: The aim of this paper is to characterize the influence of wood sawdust and fibers on the extrusion behavior of a material with a cement matrix at various substitution levels of sand by wood aggregate. A study of the slump of extruded mixtures highlights the fluidity of these replacement mixtures. For the case of sawdust, the extrusion force recorded during testing indicates that the mixtures serve to reduce the necessary extrusion force. This extrusion behavior is not the same in the case of mortar fibers.

Keywords: Waste, Recycling, Wood mortar, Rheology, Extrusion

Pages: 150 - 154 | DOI: 10.15224/978-1-63248-012-5-105

27. LIQUID COOLING OF NON-UNIFORM HEAT FLUX OF CHIP CIRCUIT BY SUBMICROCHANNELS

Authors: AHMED A. Y. ALWAALY , MANOSH C. PAUL , PHILLIP DOBSON

Abstract: Sumbmicrochannels have been placed on the hotspots in a non-uniform heat generated chip circuit to increase the liquid/solid interaction area and then to enhance the heat dissipation. Main microchannels width is 185µm, which is twice the width of the submicrochannels and also includes the wall thickness of 35µm, and wall height is 500µm. The chip dimension is 10mm×10mm and the hotspot is 4mm×10m. Different positions of the hotspot have been investigated e.g. upstream, middle and downstream. Uniform heat flux is 100W/cm2 while for the hot spot is 150 W/cm2. Single channel simulation reveals that the downstream hotspot gives a lower temperature of the chip circuit surface; however the upstream hotspot has more uniform temperature distribution. A special design of manifold was adopted to ensure an equal mass distribution through the microchannels.

Keywords: Chip circuit, nonuniform heat flux, submicrochannels, CFD

Pages: 155 - 159 | DOI: 10.15224/978-1-63248-012-5-116

28. TECHNOLOGICAL PREPARATION OF PRODUCTION ENVIRONMENT SYSTEM FOR AUTOMATION OF THE ENGINEERS WORK “PROTECH’’

Authors: ROSSEN IVANOV , STEFAN KIRILOV KARTUNOV

Abstract: Present article, entitled with the following main subject – “System for automation of the engineers work "Protech”. In this presentation the most important and major subject is – development of an integrated system for automation of the engineers work in technological preparation of production and its application in practice. Described are its main modules programming, planning and prototyping of production, structure and algorithm, methodology of work, interface and software. In this sense the system “Protech” falls in the focus of attention from work UACEE.

Keywords: technological preparation and planning of production, CNC machines, automation of engineers’ work, PLMprogramming.

Pages: 160 - 166 | DOI: 10.15224/978-1-63248-012-5-117

29. CHARACTERISATION OF A NOVEL FOAM FILLED FLUID VIBRATION ISOLATOR

Authors: HAITHEM ELDERRAT

Abstract: Foam-filled fluid (FFFluid) is an innovative material technology that can be used to design anti-vibration devices. This material technology is able to dissipate energy via a number of mechanisms due to the combination of elastic and buckling properties of foams, viscosity properties of fluids and the method of packing the material. The relationship between the energy isolation mechanisms can be altered by modifying the properties of the constituent components which provides significant opportunity for tailoring the response of the isolator to meet the different demands placed upon it. While previous studies have characterized the FFFluid shock absorbers, this paper covers the characterization of the mechanical properties of FFFluid vibration isolators. The work presented here starts by studying the parameters that have an effect on the performance of an FFFluid isolator theoretically. Then, the influence of a selected number of factors on the transmissibility of an FFFluid isolator is

Keywords: filled, fluid, isolator

Pages: 15 - 20 | DOI: 10.15224/978-1-63248-054-5-43