Print ISSN: 1992-7428

Online ISSN: 2706-686X

Volume 5, Issue 11

Volume 5, Issue 11, Summer and Autumn 2008, Page 1-98


Development of Maintenance Management System for Himreen Dam Project

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 1-16
DOI: 10.37650/ijce.2008.14124

The concept of the modern maintenance management has been developed inparallel with the international development of the science and technology, especiallytargets identification of the management, and it’s duties in the hydraulicestablishments.The research included a real state study of maintenance management activitiesof Himreen dam to propose a suitable maintenance management system. Also itpresented a description of the dam importance and discussed the concept of themodern maintenance; definition, classification, and the analysis of the four factors ofmanagement system which are (planning, organizing, directing and controlling).The field survey included preparing the questionnaire list, conducting thestatistical analysis for it's axes, and discussing the results.Many conclusions and recommendations have been deduced which related tothe applications of the maintenance management in the dam project, and to generalizethe proposed system in future to all dam’s projects in Iraq.
 

Behavior of Polymer Modified Concrete Slabs under Impact

Bayan S. Al-Numan; Abdulkader Ismail Al-Hadithi

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 1-24
DOI: 10.37650/ijce.2008.45139

This research includes the study of improving impact resistance of concrete using
styrene butadiene rubber (SBR) with different weight ratios of polymer to cement 3%, 5%
and 10%. Two series of polymer modified concrete (PMC) were produced the first level I
with moderate compressive strength and the other level II with higher compressive strength.
Cubes, prisms and panels were made as follows:
Results showed an improvement in impact resistance of polymer modified concrete
(PMC) over reference concrete in low-velocity and high-velocity impact properties. In
conducting low-velocity impact tests, method of repeated falling mass was used: 1300gm
steel ball falling freely from three heights 2400mm, 1200mm and 830mm. In high-velocity
impact tests, shooting of 7.62mm bullets was applied to slab specimens from distance of 15m.
The improvements were significant in low velocity impact resistance. The maximum
increases were (33.33%, 75% and 83.33%) at ultimate failure for falling mass heights
2400mm, 1200mm and 830mm respectively.
In high-velocity impact strength tests, maximum reductions recorded in spalling area
were (18.5% and 27%) for polymer modified concrete (level I) with moderate compressive
strength and polymer modified concrete (level II) with higher compressive strength.Maximum reductions recorded in scabbing area were (11.42% and 35.6%) for polymer
modified concrete (level I) with moderate compressive strength and polymer modified
concrete (level II) with higher compressive strength, respectively.

بناء نموذج ریاضی لاختیار واسطة النقل للرحلات المنجذبة إلى مدنیة الرمادی

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 17-26
DOI: 10.37650/ijce.2008.45136

Ramadi city is one of the cities, which needs to a comprehensive
transportation studies because of the change in the economic and social state of
the population. This change cause an increasing in the number of population and
the proportion of owns the vehicle, thus increasing the number of trips, thereby
making them suffer jamming in the transportation network at peak hours.
For purposes of this study, the city were divided into 18 zones in which
data has been collected for special statement makers trips (the rate of income,
vehicle ownership,...... etc.), the purpose of the trip, and the characteristics of
transportation modes (the time of trip, the cost of the trip ,.... ... etc).
A model was building for the purpose of the trip (shopping trip, working
trip, and education trip) to predict the percent of contribution of each type of
transportation modes for trips attraction to the city, by finding of the relationship
between them and the characteristics of trip ,trip-makers and transportation
modes. a strong linear equations where found after analysis by multi-linear
regression and these equations can be used in the future forecasting for the city.

Diagnosis of Fire Simple R.C Building Members Damages By Using Expert System

Ali M. Sagheer; Yousif A. Mansour Al-Kubaisy; Haitham Z. Hussein Al-Qaissi

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 25-46
DOI: 10.37650/ijce.2008.45141

During the last four decades, incidence of failure of reinforced concrete structures
has been seen widely for many reasons, such as increasing service loads ,war
accidents, fire and/or durability problems and the economic losses due to such failures
are costly. Nowadays, the size and the form of repair and rehabilitation market are too
large since there has been an increased emphasis on repair and retrofitting of defected
structures over demolition and new construction. An expert system is an interactive
computer-based decision tool that uses both facts and heuristics to solve difficult
decision problems based on knowledge acquired from an expert. To realize these
requirements, a logic programming Prolog language was utilized together with
diagnosis technology. The logic programming language formalizes the domain
knowledge. The expert system Diagnosis of Fire Simple R.C Building Members
Damages (DFSRCMD) developed in this paper is a diagnostic advisory system, which
can be used as an alternative to the human expert, to give technical decisions in
diagnosing fire damages in R.C. structural elements: beams, columns and slabs.

تقییم نوعیة میاه خزان الحبانیھ باستخدام تقنیات الاستشعار عن بعد ونظم المعلومات الجغرافیھ

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 27-38
DOI: 10.37650/ijce.2008.45137

In this study remote sensing was employed with Geographical Information
System (GIS) for study the hydrochemistry properties for Habania Lake that is
located on Euphrates river, where the use of traditional methods are not fulfill
the demands for study quality and situation of water of great areas which need
enough time and money . Analytic study was performed on hydrochemical
aspect through samples of store water and make physical and chemical water
tests with GIS to product layers represent place distribution nature of these
elements on the whole area of reservoir through the use of satellite image.
The present study concluded that the use of remote sensing , geographic
information system and analytic study for samples was employed to study
quality and situation of water .

Study the Effect of Guide Sign Position on Traffic Behavior at Exit Freeway Weaving Areas by Developing Computer Simulation Program (FWASIM)

Mehdi I. Al-Kubaisi

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 47-59
DOI: 10.37650/ijce.2008.45142

Traffic control devices notify road users of regulations and provide warning and
guidance needed for safe, uniform, and efficient operation of all elements of the traffic
stream. Traffic control devices have been a part of the roadway system. Researches
have evaluated various aspects of the design, operation, placement, and maintenance
of traffic control devices.
The purpose of this research is to develop a simulation model in order to
evaluate the effect of overhead sign position on the traffic performance at exit of
freeway weaving area. To achieve that subroutine was developed and added to
FWASIM program to compute the sign position and compare it with the driver sight
distance. Following that a proposed example represents an exit weaving area was
examined with different traffic flow configuration (different percentages of link flow
and on-ramp flow) with respect to no sign installed and other three sign positions.
Results indicate that the average traffic speed is underestimated when there is no sign
installed, while no significant effect is shown when the sign position is changed within
the driver sight distance.
In conclusion Guide signing is a critical element in the effective, efficient and
safe operation of motorways and expressways. Signing issues must, therefore, be fully
considered at the feasibility stage of any project.

THE EFFECT OF THE HEAVY RECREATIONAL TRAFFIC ON THE DESIGN OF THE FREEWAY

Asma Th. Ibraheem

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 60-75
DOI: 10.37650/ijce.2008.45143

Traffic engineers frequently are engaged in evaluating the performance of
different facilities of the highway system. The facility in this project includes freeway
section. In design of a freeway, a forecast demand volume is used with known design
standards for geometric features and a desired level of service to compute the number
of lanes required for the freeway section in question. The design application is straight
forward for each usage, but trial-and- error operation analysis may be required to
evaluate alternative design. Design requires a detailed traffic forecast, including
volumes, peaking characteristics, traffic composition, and specifics of vertical and
horizontal alignment for the section under study.
The aim of this paper is the design analysis of a freeway with a heavy
recreational vehicles. This analysis involves the consideration of three examples of
freeways. Given known geometric roadway conditions and projected traffic conditions
, the design analysis yields an estimation of the number of lanes and of the speed and
density of the traffic stream. This paper has described the procedure for determining
the number of lanes of freeway basic sections as presented in the Highway Capacity
Manual (HCM, 2000) and HCS2000 software.

Modification AsphaltMixture Performance By Rubber Silicon Additive

Asmiet Ramizy Abd-Alghafour; Taher M.A. Al-ani

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 76-87
DOI: 10.37650/ijce.2008.45144

This study is the second stage of the paper “Study the Effect of Rubber Silicon
on Physical Properties of Asphalt Cement”. This study took the effect of additives on
asphalt mixture performance.
Asphalt mixture has been designed by Marshall method for determining the
optimum asphalt content and geophysics properties of mix according to ASTM (D-
1559 ). Rubber silicon at different percentage (1%, 2%, 3% and 5%) was added to
asphalt binder and three specimens of asphalt rubber silicon mixture (ARSM) are
prepared and evaluating according to Marshall method. Diametric tensile creep test
ASTM (D-1075) at 60 Co used to evaluating permanent deformation and modulus of
elasticity for ARSM.
The study shown that the Rubber-Silicon has more effects increasing the
marshal stability, air voids, and reducing the flow and bulk density compared with the
original mix.. Increase the flexibility properties of the mix and this appear from
reducing the permeate deformation at test temperature (60C), the reduction percent
is about (30 to 70)%

Effect of Wind Pressure on Horizontal Alignment of Highways

Ahmed H. Farhan

Iraqi Journal of Civil Engineering, 2008, Volume 5, Issue 11, Pages 88-98
DOI: 10.37650/ijce.2008.45154

The geometric design of highway alignment consists mainly of the design of horizontal alignment and
Vertical alignment. The more important step in horizontal alignment design is the curve radius determination.
The equation used for horizontal curve radius determination is developed with assumption that when vehicle run
on curved section, there are an acting force on it. This force include the centrifugal force that try to push vehicle
out off its path , on the other hand there are resisting forces try to keep the vehicle on its path. Those include the
friction between road surface and tires and forces resulting from sloping the highway cross section. When a
vehicle on rural highway with high embankment the wind Pressure will play an important role in force system
acting on vehicle because of increasing in wind pressure intensity at these conditions (rural highway, i.e open
areas, high embankment). The purpose of this paper is to present a new equation for horizontal curve radius
determination taking in to account the wind force effect in addition to other forces acting on vehicle
The resulting equation relates vehicle length, height and weight and the wind pressure as well as the
other factors in traditional equation. Effect of each parameter on design radius was investigated for the case where the wind direction is acted with the same centrifugal force direction. It has been found that the required
minimum radius increase with the decreasing of vehicle weight or in the other words the vehicle permitted speed
decrease with the decreasing of vehicle weight. On the other hand, the required curve radius increases with
vehicle height increasing. Consequently, permitted height of bags loaded on a truck is related to the type of
loads. Derived equation can also be used for estimation of the permitted truck speed on existing roads especially
in case of bad weathers
The comparison between the traditional and suggested equation showed that maximum difference is
about 160 % which results at high wind pressure while the difference is up to 20 % for low wind pressure