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Register a new userتحضیر بیتون مسلح بقضبان لامعدنیة و توصیف لمشاریع البنیة التحتیة
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Publication date
2015
and research's language is
العربية
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تقدم هذه الرسالة بعض النتائج لبرنامج تجريبي كبير برعاية الهندسة المدنية دمشق. المشروع يهدف إلى دراسة قابلية تقوية و تسليح الإسمنت باستخدام قضبان من بوليمير الإيبوكسي المقوى بألياف الزجاح و المقارنة مع تسليح الإسمنت باستخدام قضبان فولاذية من حيث الخواص الميكانيكية.
The paper presents some of the results from a large experimental program undertakenat the Department of Civil Engineering of Damascus University. The project aims to study the ability to reinforce and strengthen the concrete by bars from Epoxy polymer reinforced with glass fibers (GFRP) and compared with reinforce concrete by steel bars in terms of mechanical properties.
References used
Kemp, Blowes. (2011). concrete reinforcement and glass fiber reinforced polymer. Queensland roads edition no ii September 2011.
Achillides, Pilakoutas. (2004). Bond behavior of fiber reinforced polymer bars under direct pullout conditions. Journal of Composites for Construction, 8 (2), pp. 173-181.
Muruts, Nad. (1998). Laminated glass fiber reinforced plastic (GFRP) bars in concrete structures.Vysokos Kolska 4, 04042 Kosice, Slovakia.
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Modified resole resin/short silica fiber composite materials have been prepared.
The resole resin was synthesized and then blended with Polyvinylbutyral (PVB)
polymer with different weight ratios to reduce its brittleness. The mechanical,
thermal
and physical properties of Resol- PVB blends were studied to
characterize these blends and select the most appropriate mixing ratio of
polyvinyl butyral with resole resin, which was identified at 15 phr of polyvinyl
butyral for every 100 parts of resole resin.
Composite materials
ألیاف السیلیكا القصیرة
راتنج الریزول المعدل
مواد مركبة
مواد شفافة راداریاً
اختبارات فیزیائیة و میكانیكیة و كھربائیة
اختبارت حراریة و اختبارات اللفح الحراري
محلل الشبكة الشعاعي
Short silica fiber
modified resole resin
radio transparent material
physical mechanical and electrical tests
thermal and ablation test
vector network analyzer
S – Parameters
المزيد..
epoxy – Conductive Carbon Black (Epoxy – CCB) nanocomposite was
prepared with different CCB/Epoxy ratios and ancamine 2280 as a curing
agent.
Surface protective thin layers of high temperature oxidation resistant aluminum
oxide Al2O3, have been prepared by the sol-gel processing, using the spin coating
method. In order to increase layer thickness, corundum suspension was added to
the al
umina sol.
This study aims to investigate the capacity of numerical
models to reproduce the monotonic behavior of reinforced concrete
framed structures.
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.
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