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Register a new user"The Effect Of Local Basalt Stones On The Behavior Of Structural Reinforced Elements Subjected To Shear And Bending "
" تأثير الحصويات البازلتية المحلية على سلوك العناصر الإنشائية المسلحة المعرضة للقص و الانعطاف "
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Tishreen University ورقة بحثية
Publication date
2018
fields
Structural Engineering
and research's language is
العربية
Created by
Shamra Editor
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تبحث هذه الورقة دراسة عملية مخبرية لإمكانية الاستفادة من مورد هام من الموارد الطبيعية المتوفرة في القطر، و هو البازلت المتواجد بكميات كبيرة في المنطقة الجنوبية (السويداء)، لبيان مدى تحقيقه لمتطلبات المواصفات القياسية لاستعماله في تصنيع الخرسانة و ذلك من خلال اختبار خمس خلطات تصميمية للبيتون المكعبية منها بأبعاد (15*15*15) سم و اسطوانية بأبعاد (15*30) سم و بنسب مختلفة للحصويات البازلتية و الكلسية الدولوميتية المستخدمة فيها كالتالي (0% بازلت و100% كلس)، (25% بازلت و75% كلس)، (50% بازلت و50% كلس)، (75% بازلت و25% كلس)، (100% بازلت و0% كلس) على مقاومة الضغط و الشد بالانفلاق و معامل المرونة بأعمار (28-7-3) يوم، و تأثيره على سلوك العناصر الإنشائية المسلحة المعرضة للقص و الانعطاف من خلال اختبار جوائز بيتونية مسلحة بأبعاد cm (16 X 12 X 200) على القص و الانعطاف و معامل التشقق بأعمار (14-28) يوم.
This paper studies a practical laboratory process of the possibility of benefiting from an important resource of the natural resources available in the country, namely "Basalt" which is found in large quantities in the southern region (As-Suwayda) to demonstrate how much it meets the requirements of Standard Specifications for use in the manufacture of concrete by testing five design mixtures of concrete , of which the cubic dimensions are (15% x 15) cm and the cylindrical dimensions are (15 * 30 cm) with different percentages of the basaltic and dolomitic calcareous compounds used in them as follows: (0% basalt and 100% lime),( 25% basalt and 75% lime) , (50 % basalt 50 % lime) (75% basalt 25% lime), (100%basalt and 0% lime) on the strength of pressure and tensile strain by Splitting and Moduls of Elasticity of ages (28-7-3) days, and its effect on the behavior of Reinforced Structural Elements susceptible to shear and Bending through testing Reinforced beams of dimensions (16 × 12 × 200) cm on shear, Bending and cracking Moduls (Coefficient) with ages of (14-28) days.
References used
ASTM 119-07 International American Society for testing and material
ASTM C33-97 International American Society for testing and material, standard specification for concrete Aggregates
ASTM C39-04 International American Society for testing and material, standard test method for compressive strength of cylindrical concrete specimens
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This paper studies a practical laboratory research of the possibility of utilizing the
natural resources available in the country, namely Basalt, which is available in large
quantities in the southern region (Al-Suwayda) in order to demonstrate the
extent to which
it meets the requirements of standard specifications for use in the manufacture of
(Reinforced) concrete by means of testing the resistance of pressure and tensile by
splitting and the elasticity coefficient of hardened (rigid concrete) at Different ages (3-7-
28) days.
As a result, pressure resistance tests increased by approximately 20 % with the
maturating period progress of concrete mixtures.
The pressure resistance of concrete mixtures prepared using basalt pebbles was
approximately 18% higher than the pressure resistance of concrete formed
usingcalcite(calcareous) pebbles in ages above 7 days
There was also a slight decrease of 8% in the split tensile resistance of the studied
samples prepared with basalt minerals , compared with the samples prepared using calcite
(calcareous) pebble and this resistance increases over time .
As for the elasticity coefficient , a 20% increase in the elasticity coefficient of the
concrete was noticed with the maturating of the concrete mixtures compared to the
referential mixture.
As a result of the scientific and technological progress in different types of
industry, one of which, Construction industry, new materials and methods
of executing and designing buildings are utilized in general. Therefore,
finding the best and e
conomical solution is one of the main issues addressed
by the researchers in recent years.
- Economical design i.e. researching best and most suitable solutions for
specified load conditions and environment requires a good knowledge in
calculation and designing methods, exacting and constructing methods and
the types and prices of materials available locally.
-This paper discusses the economical design of the reinforced concrete
components specified for the basic forces(M,Q,N). Consequently, it is the
economical design of the structural framework of the reinforced concrete
buildings according to the main changes of materials price for constructing
these structures at specific local conditions.
The aim of this work is to demonstrate the role that slabs plays in
RC high-rise buildings. This study shows the mistakes may be
done by modeling slabs as rigid diaphragms. Then after, the
rehabilitation ability of these systems can be more accurate.
Frame structures contribute to resist the seismic loads. On the other hand, many techniques were used to improve the resistance against lateral loads where steel shear walls are considered to be one of these ways.
This research aims to study the eff
ect of strengthening of the
reinforced concrete frames inserting perforated steel plate shear walls embedded within the frame. This study applied numerical analysis using Finite Element Method (FEM) using nonlinear pushover analysis based on geometrically and Materially Non-Linear Analysis (GMNLA) was performed. To study the behavior of the steel plate that seal the hall span of the reinforced concrete frame against lateral loads. Moreover, perforated steel plate was studied taking under consideration the effect of the number and the area of the perforations and strengthening of the perforations circumference on the resistance was observed.
This study conclude that using a perforated steel plate shear wall with reinforced- concrete frames and strengthening of the perforations circumference can enhance the resistance significantly beside that it decrease the frame deflection.
This study was conducted in Syria Street, which connects between Yemen Square
and Republic Square in Latakia City. This paper cares to analyze arboreal rows in SYRIA
Street and to study their relation with the service and structural engineering com
ponents Of
that street . Moreover, the ideal state of these street trees was evaluated .Results of this
paper revealed, that the arboreal rows contain two botanic species (Ficus nitida L,
Jacaranda mimosaefolia Don.), which served to furnish the street with monotonic beauty
and humility in botanic diversity,and prominent breaks in these rows. Findings showed an
ideal decrease in the value of the two used botanic species where (Ficus nitidia) attained a
mark of 6.8/10 and (Jacaranda mimosaefolia) 6.34/10 . Corresponding to the relation of
trees to some street engineering elements, results indicated inobservance of standard
dimensions between planted trees and service elements. which negatively influenced the
aesthetic and position value of buildings’ and stores’ facets and guiding signs and
billboards on the one hand, and risk increase on pedestrians and vehicles due to blocking
vision of traffic signs and overlap of tree crowns with electricity and lighting posts on the
other hand.
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