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Register a new userRetrofitting Of Reinforced Concrete Columns Using Locally Available Welded Wire Meshes (WWMs)
تدعيم الأعمدة البيتونية المسلّحة باستخدام الشبكات المعدنية الملحومة المتوافرة محلياً
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يهدف هذا البحث إلى دراسة تدعيم الأعمدة البيتونية المسلحة الخاضعة لحمولة ضغط محورية باستخدام قمصان من الفيروسمنت (الملاط المسلح بشبك حديدي) Ferrocement و المحتوية على طبقتين من شبكات الأسلاك الملحومة Welded Wire Meshes المتوضعة ضمن طبقة من الملاط الإسمنتي العالي المقاومة. أجريت التجارب في مخبر البيتون و مواد البناء في كلية الهندسة المدنية بجامعة دمشق، و تمّ تحليل النتائج لمعرفة أثر طريقة التدعيم على كل من مقاومة الضغط القصوى للعمود ، مطاوعة العمود ، أشكال الانهيار. حيث بيّنت النتائج التجريبية فعالية استخدام شبكات الأسلاك الملحومة المتوافرة محلياً لتدعيم الأعمدة البيتونية المسلحة.
This research paper revolves around studding the repairing of reinforced concrete columns which are subjected to an axial compression load, by using ferrocement jackets containing two layers of Welded Wire Meshes (WWMs), which are in turn encapsulated in high strength mortar. The experiments were carried out at the concrete lab in the faculty of civil engineering, Damascus University. The results were analyzed in order to determine the effects of repairing technique on Ultimate Compressive Strength, Ductility of the Column and Failure Modes. Empirical results confirmed the efficiency of using locally available welded wire meshes in repairing of reinforced concrete columns.
References used
AMRUL KAISH ,A.M.; ABDUL WAHED, Md; RABIUL ALAM ,Md. BEHAVIOUR OF FERROCEMENT ENCASED SQUARE REINFORCED CONCRETE COLUMN UNDER ECCENTRIC LOADING.in ICSECM 2011, Kandy - Sri Lanka, 2011
ACI Committee 549 (ACI 549.1R-93(.Guide for the Design, Construction,and Repair of Ferrocemen.1993
KONDRAIVENDHAN,B; PRADHAN,B.Effect of ferrocement confinement on behavior of concrete.Construction and Building Materials,vol. 23,NO. 3,2009,1218 - 1222
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The study
will examine the effect of changing the diameter of the longitudinal
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to ACI 213R-03) by using scoria aggregates. Several concrete mixes have been d
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with different proportions of scoria aggregates. The cement content (c=450 kg/m3), the
ratio (w/c = 0.36) were kept constant in all the mixes.
Different tests were performed to determine some properties of product concrete
such as density, compressive strength and splitting tensile strength. The density of product
concrete was in the range of (1752-1917 kg/m3), compressive strength was in the range of
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demonstrated the possibility of production concrete achieved the Requirements of the
American code ACI 213R-03 for structural lightweight concrete.
In the study, it was customary to consider
each column in the building as a cantilevered element in resisting
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This research deals with the minimum cost design of reinforced concrete T-beams
according to the Syrian code. The aim is to minimize the total cost of the beam while
respecting all the design requirements. Traditional method depend on a set of supp
ositions,
in the opposite this methodology aim to reach the optimal solution among a set of
constraints with respect the objective function. So that, using this methodology leading to
the minimum cost reinforced section design.
This research is shown that the problem can be formulated in a nonlinear
mathematical programming format.
Several cases are used to explain the applicability of the formulation in accordance
with the current Syrian code. Traditional method of Syrian code has been used to design
sections in this paper, utilizing the nonlinear programming method provided by Lingo14.0
software from LINDO Systems Inc. The comparison of the results shows that important
saving can be obtained at the total cost of a reinforced concrete T-beams design.
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