7 research outputs found
Prediction Of Pressure Coefficients For Flat Lip Vertical Gates
The main function of dam structures is to regulate the discharges and heads of water
required to satisfy the demand of power generation and water quantity supplied to river
or stream behind the structure, hence the sluice gate will play the big role to achieve this
process and then its design needs much more attention. The sluice gate within the tunnel
of the dam is exposed to many types of static and hydrodynamic forces .Among these
forces is the hydraulic downpull force which created from difference between
downward force produced by flow passing over the top surface of gate and uplift force
exerted by the jet flow on bottom gate surface . The evaluation of positive and / or
negative downpull force values is important due to its effects on closure of the gate. The
estimation of such force needs determination of many related parameters such as
pressure distribution along and cross the bottom gate surface, top pressure ,jet velocity
issuing below the gate ,operation head and the head downstream the gate shaft. In
present research, the hydraulic model is used to carry out the required measurements
and different types of gate lip shapes have been examined with various flow conditions
and gate openings to evaluate the downpull force coefficient. The analysis of results
assured that the geometry of the lip gate has significant effects on the hydrodynamics
forces and consequently on its operation which in the case of its negative value will
prevent the gate to close and make some failures and damages
Sustainability In Construction Projects: Part 2 (Case Studies)
The guideline developed in a companion study by the authors is applied and studied in
this work to assess the sustainability score of several big construction projects in
Kurdistan Region of Iraq. Results were varied as the sustainability measures being
applied on certain steps and neglected on many others .Attention on this issue can be
found in the conclusions
Environmental Pollution and Impacts of Dust Storms on the Traffic Safety
The study aims to investigate the negative effect that the dust storms leave on the
human health in general and on the traffic safety as well. Five represented samples
of the dust have been collected from the storms which occurred during (2009 and
2010) in Tikrit city/ north of Iraq to find it's particle size distribution, existence of
heavy metals, and radioactive minerals, in addition, a survey that consists from 70
samples has been collected to examine the driving difficulty during such condition.
Grain size analysis show that the silt size forming the majority (62.6% ), fine sand
(23.52%) and clay (13.88%) , also CaCO3 and organic content have been
determined with average (25.9%) and (2.11%) respectively. The heavy metals
including Cd, Ni, Pb, Cr, Co, and Zn showing that Zn , Ni, Co and Cr are more than
the standards in the crust of the earth which considered pollutant elements while Cd
and Pb are less than the standards. It was found that 92% of the drivers face
difficulty during driving in dusty weather, 47% of the drivers has health problems
concerns the dusty weather and 20% of them tend to change their destination or drive
faster when they face dust storm while drivin
Prediction of Time-Dependent Deflection of High Strength Concrete Panels
This work presents a model for predicting analytically the time dependent deflection
of high strength concrete HSC slabs. This model considers the factors that are
significantly influence the long-term deflection of concrete slabs. Realising the
effect of time on slab flexural rigidity, the proposed method follow the method of
conducting short-term deflection of slabs.The analytical deflection based on the
proposed method are compared with the experimental work conducted by the
authors in 2005 (1) and also with several field measured deflections
RESIDENTIAL BUILDING DEVELOPMENT PROCESS IN KURDISTAN REGION GOVERNMENT
Nowadays, Residential buildings have become the most important part of real-estate
markets in (KRG). The layout of housing in Kurdistan has transformed the face of
major cities across the Region. Rapid changes since 2003, have witnessed copious
architectural structures and large housing projects that have reshaped the landscape
of its cities. The aim of this study is to study the housing developing policy in KRG.
The objectives of the study are to evaluate the KRG's housing development policy
and to investigate the types of house and the price range preferred by the potential
buyer. The study focus on private residential building development projects and it is
carried out by questionnaires and interviews. The respondents are the house buyers
and the developers. A total of 100 questionnaires were distributed to the respondents
and 78 questionnaires were returned duly answered. The data collected is analyzed
using the SPSS (Statistical Package for the Social Sciences) and Average Index. The
results of research indicated that the KRG’s housing development policy covers the
ownership of the project land, full repatriation of project investment and profits
allowed, import of spare parts tax exempt up to 15% of project cost and the
employment of foreign workers allowed. Moreover, the types of house preferred by
the house buyers are of double storey type and to be of corner lot. The price range
preferred by the potential buyers are between (40,000 to 100,000) USD
Erbil Citadel Landscape Assessment In Order To Regional Best Practices
Many heritage areas around the world are suffered from neglect in maintenance or
rehabilitation, and never consider their historical values as an attraction places for
visitors, in addition to these problems a lot of ancient buildings were removed in
different old cities and a new modern constructions were shown instead of traditional
ones, and that leads to visual and structural distortion and thus a problem in tourism.
The area surrounding the citadel of Erbil suffered from many of these troubles, thus we
have to focus on them, and present suggestions to solve the problems by presenting a
world successful experience in this fiel
Applications Of Geographic Information Systems In Construction Management
Construction management is one of the fields of Civil Engineering. It includes planning,
analyzing, coordinating and controlling of sequential activities in construction site. The
primary goals of construction management are to minimize the loss of time and
construction costs by appropriate materials, adequate labor and resource selection.
These objectives can be achieved by current and updated continuous information flow
between participants and departments of construction organization. When information
sharing doesn’t happen effectively and timely it results delays and additional costs at the
construction projects. Information technology has become prominent position in the
development of technology. It supplies some opportunities to construction industry. One
of the important parts of information technology is geographic information systems. It
provides effective solutions to the locational based problems so they are used in many
areas. The possibilities of using GIS in construction management and new models have
been developed in various countries in the world in recent years. In this study, using
GIS in construction management is investigated and a new method in construction
management is tried to develop by use of GIS. Another aim is to supervise all data
related with construction on a single platform. A new office block in Erbil is determined
as a case study. Project drawings of the building are brought to three-dimensional form
in GIS and it is visualized according to the data in the schedule of construction.
Database support and visualization feature of GIS is put forward in this paper