ﺒﻨﺎﺀ ﻨﻅﺎﻡ ﻤﻨﻁﻘﻲ ﺘﻠﻘﺎﺌﻲ ﻻﺴﺘﺨﻼﺹ ﺒﻴﺎﻨﺎﺕ ﺍﻻﺸﻜﺎل ﺍﻟﻬﻨﺩﺴﻴﺔ ﺍﻻﺴﺎﺴﻴﺔ ﺍﻟﺴﻁﺤﻴﺔ ﺜﻼﺜﻴﺔ ﺍﻷﺒﻌﺎﺩ
text
article
2007
eng
This research could be classified under the group of 3D CAD. It includes manipulation of 3D surface primitives by using the most drawing common package, namely AutoCAD for drawing these shapes and save thing in DXF format, after that a suitable logical program is built to recognize these shapes and to create the required mathematical relationships for the purpose of data extraction of these shapes such as length, width, height, and diameter, etc. Also the automatic recognition of these shapes and their extraction have been done for the purpose of maneuverability and improve the ability of dealing with these 3D surface primitives in DXF format. AutoCAD package is used as a drawing and viewing tool, throughout the full connection between this package and the proposed software program using visual basic programming language.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
76
97
https://etj.uotechnology.edu.iq/article_181353_79fb9e9401dffe35ac05ca2f9c0261ba.pdf
dx.doi.org/10.30684/etj.25.3.1
Study of Spectroscopy and Thermodynamic Properties for CHCl3 Molecular and Influence Its of Bonds (C-H) and (C-Cl) on Spectroscopy Properties
text
article
2007
eng
In This research studies spectroscopy and thermodynamic properties of Chloroform molecule CHCl3, Also the study includes plot of molecule potential energy curve of (C-H) and (C-Cl) bonds, Then the dissociated energy which was (2.65 eV) for (C-H) and (1.88eV) for (C-Cl), And study covers the vibration modes of CHCl3 and frequencies which were active in Raman and IR spectra due to the change of polarization and dipole moment at molecule. Orbit energy Homo was (-10.879 eV) for higher orbit energy occupied and (0.7972 eV) for Lumo lower orbit energy unoccupied. Also total charge density and electrostatic potential were calculated from the diagrams in two and three dimensions. Thermodynamic properties such as Heat of Formation (∆H˚f) kcal/mol, Enthalpy (H) cal/mol, Heat Capacity (Cp) cal/k/mol, Entropy (S) cal/k/mol, and Gebb's energy (G) kcal/mol were calculated at room temperature and were (-20.874, 3502.104, 16.339, 77.974, -19.734)respectively.
Engineering and Technology Journal
University of Technology-Iraq
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3
no.
2007
98
110
https://etj.uotechnology.edu.iq/article_181354_0794c3f5028b4d82a5c0ebcf039a31fd.pdf
dx.doi.org/10.30684/etj.25.3.2
التشكيلات الفنية للإضاءة الداخلية لبهو الفنادق
text
article
2007
eng
any studies concentrated on the lighting subject in interior spaces.Some of these studies considered lighting as an artistic factor in the publicinterior space, but it didn’t present a clear picture about achieving artisticarticulation of interior lighting in public reception spaces specifically hotelslobby. This study is trying to explore building principles of artisticarticulation of interior lighting in public reception spaces (hotel lobby).The research hypothesis that an artistic articulation buildinginfluenced by structural and meaningful principles of interior lighting inpublic reception spaces of hotels lobby.To tackle research problem, it crystallized a conceptual model,represented by lighting elements, art, and articulation in public receptionspaces in hotels lobby, secondary and main assumption types have been built,included four major types of Artistic assumption modes to the lighting whichare as follows:Dramatic, spacious or restful, dramatic spacious and spaciousdramatic type.The semi-empirical research depended on surveying descriptive method andobservational check list as experimental tool. Intentional sample was selected,including (5) interior spaces as research settings. Perspective shot was used asanalytical unit. Data was gathered through 4 surveying phases that lasted for(3) months approximately. T-test and was used to treat data statistically using(SPSS) program.The results proved, the importance and activity of artistic articulationtypes which are represented by restful dramatic, spacious or restful dramaticrestful, and dramatic in public reception spaces of hotels lobby.Final conclusion revealed that potentiality of varied usage of artisticarticulation representing by dramatic, spacious and others being result outfrom the reaction of there two types represented by spacious dramatic anddramatic spacious in public reception spaces in hotel lobby. Finally,recommendation was discussed.
Engineering and Technology Journal
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no.
2007
111
131
https://etj.uotechnology.edu.iq/article_181355_54557c3df01efeed83e53d22088b757c.pdf
dx.doi.org/10.30684/etj.25.3.3
Discharge Measurement in Rectangular Channels Using Portable Prisms
text
article
2007
eng
Discharge measurement in open channels has a great importance in waterresources management. Many types of discharge measurement devicesappeared, with differences in view of their technical performance andprecision. From these devices there are the critical depth flumes.In the present research, a portable prism was tested for measuring dischargesin rectangular channels. The prism is positioned in the middle of the channelsso that a critical flow is created. Five models of prisms were used, each ofwhich has been examined for both free flow and submerged flow conditions.Under free flow conditions, the prism showed a high accuracy in measuringdischarges and there is a good agreement between calculated and measureddischarges. Under submerged flow conditions, the prism showed a goodperformance and acceptable accuracy.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
132
142
https://etj.uotechnology.edu.iq/article_181365_7db8e9234c26701cd64942f0d760cb3f.pdf
dx.doi.org/10.30684/etj.25.3.11
استخلاص النيكل من مخلفات حرق الوقود الثقيل بالإذابة المائية وترسيب فلزه كهربائياً
text
article
2007
eng
This research include extraction of nickel metal from residual of fired heavy oilin electric power station, the residual were pretreatment by grinding and sieving,the nickel concentrated by particle size.Magnetic separation was also performed in order to get rid of iron that was inheavy oil residual in the form of magnetite, and the results show the ability ofseparating 86% of iron.Vanadium was recovered from the residual by alkaline leaching method usingsodium hydroxide solution and this step resulted in the leaching 98.63% ofvanadium, also increasing nickel concentration to 16.27%.Subsequently extraction of nickel from the residual was studied using thehydrometallurgy method. The leaching of nickel from the residues was carriedout using sulfuric acid and the result obtained show the possibility of obtainingthe highest leaching ratio at acid concentration 3 molarity, temperature 100oC,time of leaching 90 minutes and solid /liquid ratio 5 gm/l.In order to recover H2SO4 from the pregnant liquid, ion exchange process wasemployed using strong anion exchanger and the concentration of nickel increasesin the liquid resulting from ion exchange process by evaporation
Engineering and Technology Journal
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no.
2007
143
158
https://etj.uotechnology.edu.iq/article_181366_ece8f8ccf8c29191b92983ba7ccada57.pdf
dx.doi.org/10.30684/etj.25.3.12
Assessing The Dead Loads Effect on the Dynamic Behavior of Plates by Using Finite Elements Method
Abbas
Allawi
author
text
article
2007
eng
In this research, a rectangular plate element for the finite elementsmethod, which takes into consideration the effect of dead loads, is proposed.The element stiffness matrix that includes the effect of dead loads is derived. Itis shown that the stiffness of plate increases when the effect of dead loads isincluded in the calculations. The validity of the proposed method is confirmedby numerical example and the results show a good agreement when comparedwith that obtained from the closed-form solutions. The proposed methodbased on a finite elements formulation is more easily applied to plate’sstructures under different support conditions and various types of dead loads.
Engineering and Technology Journal
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no.
2007
328
333
https://etj.uotechnology.edu.iq/article_181356_6f0b27b261c4e75d4ce65b99e8f55ae0.pdf
dx.doi.org/10.30684/etj.25.3.4
Artificial Neural NetworkModel for Predicting Nonlinear Response of Uniformly Loaded Fixed Plates
Ayad
Abdul-Razzak
author
text
article
2007
eng
An artificial neural network (ANN) model has been developed for theprediction of nonlinear response for plates with built-in edges and differentsizes, thickness and uniform loads. The model is based on a six-layer neuralnetwork with back propagation learning algorithm. The learning data wereperformed using a nonlinear finite element program, the set of 1500x16represent the deflection response of load. Incremental stages of the nonlinearfinite element analysis was generated by using 25 schemes of built-inrectangular plates with different thickness and uniform distributed loads.The neural network model has four input nodes representing the uniformdistributed load, thickness, length of plate and length to width ratio, fourhidden layers and sixteen output nodes representing the deflection response.Regression analysis between finite element results and values predicted by theneural network model shows the least error. This approach helps in thereduction of the effort and time required determining the load-deflectionresponse of plate as the FE methods usually deal with only a single problemfor each run while ANN methods can solve simultaneously for a patch ofproblems.
Engineering and Technology Journal
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no.
2007
334
348
https://etj.uotechnology.edu.iq/article_181357_f3be9ccdf6bb56a3c081d481cc09e01f.pdf
dx.doi.org/10.30684/etj.25.3.5
Evaluation of Sediment Transport In Kirkuk Irrigation Channel
Muhanned i
Al-Kizwin
author
Saleh
Khassaf
author
text
article
2007
eng
In this research, the sediments transport and how to compute their amount have been studied in Kirkuk irrigation channel. Empirical methods for computing sediments discharge in the channel have been discussed emphasizing on six methods (Blench, Graf, Laursen, Yang, Inglis- Lasey and Engelurd–Hansen). The applications of these methods required the selection of (24) sections along the channel in order to measure the hydraulic parameters of the different cross sections in addition to the slope along the channel. Samples of water sediments have been taken at each section in addition to bed samples. The research introduces an equation for computing sediment load in Kirkuk irrigation channel depending on the data of (14) sections in the channel using statistic- MS program. The validity of this equation has been verified with the application to the remaining (10) sections data in the channel and the results are very close to the field measurements .
Engineering and Technology Journal
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3
no.
2007
349
357
https://etj.uotechnology.edu.iq/article_181358_5cc5b12477c96c80326c8294c4861634.pdf
dx.doi.org/10.30684/etj.25.3.6
Load-Slip Relationship in Modified Push-Out Test (Experimental Work)
Mukhallad
Al-Saady
author
text
article
2007
eng
In this work, a modified push-out test is proposed to study the load-slip relationship in steel-concrete-steel sandwich beams. This relation is one of the most important factors that are required in the analysis and design of steel-concrete-steel sandwich beams with partial interaction. The diameter of the connector is assumed to be variable while the other parameters are kept constants. The modification in this test in comparison with the standard test concentrated on the use of steel tube- concrete slab- steel tube instead of concrete slab- steel (I-Section)- concrete slab (in Standard Test) in order to be more compatible than the standard test in modelling the steel-concrete-steel sandwich or double-skin beams. The stud is suggested to be threaded along the whole length, connected to the tube by a nut (the separation between the layers is eliminated and only interlayer slip is assumed to exist) and the connector passes to the other tube through the concrete slab (thus the connector is subjected to double shear force). These cases maximize the function of this stud. Five dial gages are used; one at the base, and two at each side in order to measure the slip at each stud. An experimental relationship of load-slip is carried out to simulate the behaviour of this type of connection in steel-concrete-steel sandwich construction.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
358
369
https://etj.uotechnology.edu.iq/article_181360_383bfb83e602999d03593bd2cd9d78fb.pdf
dx.doi.org/10.30684/etj.25.3.7
Investigatiion off Contact Interface Betweenane the Punnch and Blank in Deep Drawwing Prrocess
Waleed
Jawad
author
text
article
2007
eng
In this work a commercially finite element program code (ANSYS 5.4), is used to perform the numerical simulation of the deep drawing operation. A simplified axisymmetric model of cylindrical cup of (44mm) outer diameter, (28mm) height and (0.5mm) sheet thickness of annealed mild steel of 0.15% carbon content, has been developed, and the numerical results are compared with the experimental work. Six types of punches of (43mm) diameter with punch profile (nose) radius of {P=3,6,9,15,18, & 21.5 mm}have been constructed and used, and the value of die profile (nose) radius is kept constant to (d=6mm). This work aims to study the effect of punch profile radius on the interfacial contact between the punch and the blank, punch load, thickness variation over the produced cup wall, localized strains and stresses distribution across the inner and outer wall of the drawn part, the height and amount of spring back of the drawn part. The results show that ; The length of contact distance between the blank and the punch increases as the punch nose increases and its value approximately is equal to punch nose radius. Increasing the punch profile radius leads to increasing the cup height about (20 % for FESimulation & 18 % for experimental work), and increasing the value of springback to about (1.75 % for FE Simulation &1.25 % for experimental work)) for punch nose radius ranging from (3 to 21.5mm). The greatest thinning is seen to occur with spherical punch due to great stretching of the blank over the punch head. The punch load decrease slightly with increasing punch nose radius .The more generous punch radius (spherical nose), the more gradual rise of the punch load and larger the punch travel. The stress and strain distributions for all geometries chosen are similar in shape, and have the same trend and approximately the same values for both inner and outer wall of the drawn part.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
370
382
https://etj.uotechnology.edu.iq/article_181361_5ed1253fc24dd685c8d332890b2288b9.pdf
dx.doi.org/10.30684/etj.25.3.8
Improvement of Marshall Properties of the Asphalt Concrete Mixtures Using the Polyethylene as Additive
Lamia
Ahmed
author
text
article
2007
eng
In order to increase the durability of highway pavement specific requirements are needed to control the quality of pavement materials. Therefore, the aim of this study is to make and test laboratory specimens in order to characterize asphalt-polymer and aggregate mixtures by using results from conventional test procedures. The research work covers six percentages of polymer content those are (2%, 4%, 6%, 8%, 10%, and 12%) percent by weight of asphalt content. The polymer modified mixes were designed in accordance with Marshall method and the engineering properties of these mixes were determined. The engineering properties of the control and polymer modified mixes (stability, flow, bulk density, percent of voids in total mix, and percent of voids filled with asphalt) were evaluated by conventional test (Marshall test).The test results show that the engineering properties of polymer modified mixes meet the requirements of the S.O.R.B. specification for the asphalt mix used in the construction of surface course. The Marshall stability for modified mixes is higher than of control mixes.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
383
394
https://etj.uotechnology.edu.iq/article_181363_716c7ab4d0c939ea2d006a43a5c0a589.pdf
dx.doi.org/10.30684/etj.25.3.9
On-Line Current-Based Condition Monitoring and Fault Diagnosis of Three-Phase Induction Motor
K.
Krikor
author
Ali
Numan
author
text
article
2007
eng
A stator current measurement has an important role in condition monitoring and fault diagnosis of induction motors. For instance, the eccentricity, rotor bars and end ring breaks, shorted stator windings can be detected by analyses based on stator current measurement. This paper addresses the application of stator current spectral analysis technique for the detection and localization of abnormal electrical and mechanical conditions that indicate, or may lead to, a failure of the induction motors. The effects of stator current spectrum are described and the related frequencies are determined. In the present investigation, the frequency signatures of some asymmetrical motor faults are well-identified using signal processing techniques, such as Welch method for spectral density estimation. In fact, experimental results clearly illustrate that stator current spectral analysis using Welch method is a very good tool to detect faults in induction motors. These faults are shaft speed oscillation, eccentricity, broken rotor bar, and end ring cracked.
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
395
406
https://etj.uotechnology.edu.iq/article_181364_cc61332d5ba4d93a2a90b7055ea5430c.pdf
dx.doi.org/10.30684/etj.25.3.10
Treatment of Oily Wastewater
Thamer
Mohammed
author
Hashim
M
author
Eman
AL-Abideen
author
text
article
2007
eng
The industrial wastewater discharge from the North Oil Company causes ahigh industrial water pollution to the agricultural lands. The present studyaims to find the possibility method for treating such industrial oilywastewater, by coagulation-flocculation and sedimentation.The experimental test will deal with the characteristics and analysis ofwastewater such as turbidity, pH, TDS, T.H, and oil concentration. Also itdeals with the effect of coagulation, flocculation, and sedimentation on theremoval efficiency of oil in wastewater and other parameters. Four types ofcoagulation were used. The experimental was carried out by using Jar-test(flocculator laboratory scale).The behavior of flocculent settling was studiedin sedimentation column.It is found from the experimental results of Jar test, the optimum alumdosages are. (25,40,70 ppm), FeCl3 dosages are (4,8,20 ppm), CaO dosage are(7,15,30 ppm) and clay dosage are (2.5,5,9 g/L) for initial oil concentration(30,58,136 ppm) respectively.The experimental results are represented by mathematical empiricalcorrelation for used coagulants alone and in combination as followsR%= 66.23+ 0.326 DA + 1.17 DF + 0.85 Dc + 6.342 DL + 0.383 C0 - 0.0026 DA2+0.302DF2 – 0.013DC2- 0.496 DL2 + 00.017 C02From the polynomial equations and graphical figures it was found the oilremoval efficiency is a function of alum, FeCl3, CaO and clay dosage andinitial oil concentration. The result of sedimentation column was indicatedthat the combination of doses improves the removal efficiency and settlingtime. The above equation shows the removal efficiency of oil decreases withincreases of initial concentration.
Engineering and Technology Journal
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no.
2007
407
421
https://etj.uotechnology.edu.iq/article_181367_6ce1f230b6aeafe4b924c1b8f7c06d0b.pdf
dx.doi.org/10.30684/etj.25.3.13
Product Design and Conceptual Process Planning Integration By Using Machining Features
Khalid
Abd
author
text
article
2007
eng
The integration of conceptual process planning and early design stages is avital activity in the modern industrial environment. Since major manufacturing time iscommitted in product specification and design, it is critical to be able to assessmanufacturing as early as possible in the design process.In this research, an algorithm is developed to build an (Integration of ProductDesign and Process Planning) system called IPDPP to demonstrate the integration ofconceptual process planning and design using manufacturing features. The developedsystem (IPDPP) validates the calculation of manufacturing time using featuretechnology. The application of the prototype system improved communication betweendesign and process planning. The (IPDPP) system has been tested on product (Shaft8E-200) in State Company for Electrical Industries. It resulted in reduction ofmanufacturing time.
Engineering and Technology Journal
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no.
2007
422
430
https://etj.uotechnology.edu.iq/article_181369_d564ba680ff643f7a5432eca04cc3da7.pdf
dx.doi.org/10.30684/etj.25.3.14
Influence of Heat Treatment Conditions on Microstructure of Ti-6Al-7Nb Alloy As Used Surgical Implant Materials
Sami
Ajee
author
Thair
Alzubaydi
author
Abdulsalam
Swadi
author
text
article
2007
eng
The study involves mechanical deformation and heat treatment effect on the microstructure of the Ti-6Al-7Nb alloy which is used as surgical implanted materials. The observed properties of (alpha-beta) Ti-based alloy are strongly dependent on their microstructures. These alloys are heat treated by solution treatment and aging (STA) as an effective strengthening method for (alpha-beta) titanium alloys. Ti-6Al-7Nb alloy is hot rolled in the (alpha-beta) field and subjected to solution treatment above and below its beta transformation temperature. The solution treatments are applied at three different temperatures (850oC, 930oC and 950oC) for one hour to these treatments. The solution treatment specimens are water quenched (WQ), normalizing [air cooled (AC) and annealed,[ furnace cooled(FC)] and subsequently aged the quenched and normalized specimens at 550oC for 4 hours. Changes in the microstructure were observed from heat treatment action using optical microscopy, Atomic Absorption Spectroscopy (AAS) and phases analysis by X-ray diffraction (XRD). The microstructure examination results for as received alloy indicate alpha grains within a β- transformed matrix. The results also indicate that the grain size and percent of α /β for the heat treated specimens depend on heat treatment type and cooling media. The microstructure of specimens heat treated at 950oC with air cooled shows fine duplex (α /β) structures which have excellent properties for surgical implanted field applications.
Engineering and Technology Journal
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3
no.
2007
431
442
https://etj.uotechnology.edu.iq/article_181370_14df7a6d37939520fc7afd616e88de46.pdf
dx.doi.org/10.30684/etj.25.3.15
Design and Analysis of A 3-D Conical Diffuser
Arkan
Husain Al Taie
author
text
article
2007
eng
Analysis of flow through the conical diffuser of an annular combustion systemis presented. The flow is assumed to be unsteady, quasi three dimensional,compressible and turbulent. A k-ε model was used to simulate turbulence.Several area ratios and divergence angles were tested until circulation tookplace. At this angle a snout was introduced to correct the flow. A control volumemethod was used to solve the differential equations of the flow to obtain velocityand pressure coefficient distributions. The numerical results show that the axialvelocity decreases with diffuser length for a certain divergence angle. But itincreases with angle of divergence for the same area ratio, while the radialcomponent of velocity was found to increase with both. It was proved that thesnout can correct the flow whenever circulation takes place.
Engineering and Technology Journal
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no.
2007
443
453
https://etj.uotechnology.edu.iq/article_181372_ed475995c62ec062be9e408cbb9c01d4.pdf
dx.doi.org/10.30684/etj.25.3.16
Experimental Study of Flexural Strength of Laminate Composite Material
Jawad
Uleiwi
author
text
article
2007
eng
The effect of fiber volume fraction on the flexural properties of thelaminated composite test specimens constructed of two layers, one of themreinforced with glass fiber and the other layer reinforced with Kevlar fiberhas been investigated experimentally.The results illustrate that tension stress decreases with the increase infiber volume fraction of glass fiber of the lower layer while it increases withthe increase of Kevlar volume fraction of the upper layer. As for compressionstress, it increases with the increase in volume fraction of glass fiber of thelower layer while it decreases with the increase of volume fraction of Kevlarfiber of the upper layer.The results also show the maximum value of tension stress (= 25.3MPa.) at Vf of Glass fiber (= 15 %) and Vf of Kevlar fiber (= 60 %), while themaximum value of compression stress (= -17.1 MPa.) at Vf of Glass fiber (= 60%) and Vf of Kevlar fiber (= 15%).
Engineering and Technology Journal
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3
no.
2007
454
466
https://etj.uotechnology.edu.iq/article_181373_645f3955777c281f73d1f0f362388db1.pdf
dx.doi.org/10.30684/etj.25.3.17
Light-Induced Etching of Silicon
A.
Ahmed
author
Alwan.
Alwan
author
text
article
2007
eng
In this work, an ordinary light is used for photo-chemical etching of n-typesilicon wafer in HF solution. Scanning electron microscopy is used to monitorchanges in surface morphology produced during the etching process. Uniformporous layer has been observed for various irradiation time. Our techniqueoffers a great controlling parameter on the porous layer uniformity comparedwith the porous layer achieved by using a laser beam. Electrical propertiesand porous layer thickness of the photo produced layer have been studied
Engineering and Technology Journal
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no.
2007
467
474
https://etj.uotechnology.edu.iq/article_181374_448f80922039b888b45a6536a9d89e3c.pdf
dx.doi.org/10.30684/etj.25.3.18
Feedforward Controller for Nonlinear Systems Utilizing a Genetically Trained Fuzzy Neural Network
Omar
Al-Karkhy
author
text
article
2007
eng
This paper presents an intelligent controller that acts as a FeedForwardController (FFC). utilizing the benefits of Fuzzy Logic (FL), Neural Networks(NNs) and Genetic Algorithms (GAs), this controller is built to controlnonlinear plants, where the GA is used to train this Fuzzy Neural Controller(FNC) by adjusting of its parameters based on minimizing the Mean Squareof Error (MSE) criterion.These parameters of the FNC include the input and output scaling factors,the centers and widths of the membership functions (MFs) for the inputvariable and the quantisation levels of the output variable, that are subjectedto constraints on their values by the expert. The GA used in this work is areal-coding GA with hybrid selection method and elitism strategy. To showthe effectiveness of this FNC several invertable (open-loop stable) nonlinearplants have been selected to be controlled by this FNC through simulation
Engineering and Technology Journal
University of Technology-Iraq
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no.
2007
475
494
https://etj.uotechnology.edu.iq/article_181375_36cbf06cee4e2c6fcd2fa68efec59858.pdf
dx.doi.org/10.30684/etj.25.3.19
Behaviour of Composite Slim Floor Beam with Partial Interaction
Eyad
K. S. Al-hachamee
author
Mustafa
Al-heety
author
text
article
2007
eng
This research includes a theoretical investigation about the behaviour ofsimply supported composite slim floor beams with partial interaction. For thepurpose of analysis, the slim floor slab system is simplified to a multi-layeredcomposite beam. The slim floor beam is embedded in concrete. Therefore, thelayers of the slim floor are connected together by natural shear bondgenerated between the steel and concrete and distributed uniformly along theinterface without using shear connectors. Linear behaviour with one degree offreedom of the slim floor (slip only) without separation is studied according toJohnson and May approach using different material properties and differenttypes of loading.Equilibrium and compatibility are satisfied for the forces and displacementsat an assumed element to arrive at two differential equations of second-orderin terms of slip and axial force. The equations are solved numerically usingthe finite difference method. A computer program is written in Visual Basiclanguage to solve the problem.The current model is applied to three typical simply supported slim floorbeams tested experimentally by “Corus Construction Center”. The modelshowed close prediction with the observed results.
Engineering and Technology Journal
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no.
2007
495
511
https://etj.uotechnology.edu.iq/article_181376_92ba5a41c8ab95caba6997a327a43bed.pdf
dx.doi.org/10.30684/etj.25.3.20