scholarly journals Cracking and strength of reinforced concrete structures in flexure strengthened with carbon fibre laminates

2007 ◽  
Vol 13 (4) ◽  
pp. 317-323
Author(s):  
Juozas Valivonis ◽  
Tomas Skuturna
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Carbon Fibre ◽  
Experimental Research ◽  
Design Procedure ◽  
Design Methods ◽  
Reinforced Concrete Structures ◽  
External Reinforcement ◽  
Tension And Compression ◽  
Theoretical Results

The article presents the analysis of the cracking moment and the strength of beams reinforced with external carbon fibre. Experimental research of beams strengthened in this way has been carried out. Three different methods of anchoring external reinforcement were applied to strengthen the beams. The influence of anchorage on the cracking moment and the strength of the beams has been defined. Design methods for defining the cracking moment and the strength have been presented. The design procedure for defining the cracking moment evaluates the curvilinear stress diagrams of concrete under tension and compression. The design procedure for defining the strength of the structures evaluates the stiffness of the contact between the carbon fibre and the concrete. The design results are provided. Comparative analysis of the experimental and the theoretical results has been performed.

scholarly journals CRACKING AND STRENGTH OF REINFORCED CONCRETE STRUCTURES IN FLEXURE STRENGTHENED WITH CARBON FIBRE LAMINATES

2007 ◽  
Vol 13 (4) ◽  
pp. 317-323 ◽  
Author(s):  
Juozas Valivonis ◽  
Tomas Skuturna
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Carbon Fibre ◽  
Experimental Research ◽  
Design Procedure ◽  
Design Methods ◽  
Reinforced Concrete Structures ◽  
External Reinforcement ◽  
Tension And Compression ◽  
Theoretical Results

The article presents the analysis of the cracking moment and the strength of beams reinforced with external carbon fibre. Experimental research of beams strengthened in this way has been carried out. Three different methods of anchoring external reinforcement were applied to strengthen the beams. The influence of anchorage on the cracking moment and the strength of the beams has been defined. Design methods for defining the cracking moment and the strength have been presented. The design procedure for defining the cracking moment evaluates the curvilinear stress diagrams of concrete under tension and compression. The design procedure for defining the strength of the structures evaluates the stiffness of the contact between the carbon fibre and the concrete. The design results are provided. Comparative analysis of the experimental and the theoretical results has been performed.

DETECTION OF STRUCTURAL PATHOLOGIES IN BUILDINGS USING ARCHITECTURAL PHOTOGRAMMETRY

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Frank Navarro Tamayo ◽  
Ana Luisa Rodriguez Quesada ◽  
Veronica Avila Ayon ◽  
Alexander Justel Betancourt
Keyword(s):  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Structural Analysis ◽  
Environmental Pollution ◽  
Reinforced Concrete Structures ◽  
Accurate Data ◽  
Conservation Actions ◽  
Natural Degradation ◽  
Degradation Of Materials ◽  
Deterioration Characteristics

Environmental pollution and natural degradation of materials cause deterioration in buildings, initiating pathological processes that require conservation actions. Architectural Photogrammetry will be discussed as a tool to identify different pathologies on buildings and to accurately measure deflections. A photographic study was conducted of the most common deflections on reinforced concrete structures, with samples of different ages and locations exposed to various environments within Holguin Province in Cuba to detect deterioration characteristics, causes and possible treatments. A comparative analysis of other common methods and instruments currently used to measure structural pathologies highlights the efficiency of architectural photogrammetry. Photogrammetry is suitable to study the most common pathologies, their causes, and potential solutions. These include: cracks, fissures, deflection in beams, footing settlement, slenderness in columns, and more. In addition to the scope and efficiency of photogrammetry, this technology also facilitates studying inaccessible points on large elements. The instantaneous recording of accurate data about physical objects gives photogrammetry advantages over conventional structural analysis methods.

scholarly journals Deformability of Short Steel Reinforced Concrete Structures on Light Concrete

2018 ◽  
Vol 7 (3.2) ◽  
pp. 370 ◽  
Author(s):  
Oleksandr Semko ◽  
Viktor Dariienko ◽  
Vitaliy Sirobaba
Keyword(s):  
Reinforced Concrete ◽  
Sheet Metal ◽  
Experimental Research ◽  
Lightweight Concrete ◽  
Structural Parameters ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Steel Reinforced Concrete ◽  
Thin Walled

The calculation, modeling and experimental research of steel-concrete tubular elements made of thin-walled galvanized sheet metal and lightweight concrete have been carried out. The proposed type of structures can be used as a separate structure in the form of a column or a pillar, and one of the types of the reinforcement of a certain light structure. The basic technological and constructive requirements for manufacturing and further exploitation of structures are given. For determination of actual work’s indexes of constructions experimental research of standards are undertaken, and recommendations on adjustment of well-known calculation formulas of close constructions as for structural parameters are given. The design (modeling) was performed in MSC / Nastran software. An analysis of the proposed structures use is carried out with the corresponding conclusions. 

scholarly journals Estimation of the pull-off resistance models of reinforced concrete structures by a numerical method

2021 ◽  
Vol 350 ◽  
pp. 00011
Author(s):  
Mikalai Shalabyta ◽  
Elizabeth Matweenko ◽  
Nikifor Matweenko ◽  
Valery Rakhuba
Keyword(s):  
Numerical Modeling ◽  
Reinforced Concrete ◽  
Comparative Analysis ◽  
Strain State ◽  
Numerical Models ◽  
Tensile Force ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
New Information ◽  
Concrete Elements

Comparative analysis of calculations of calculation numerical models for pulling out embedded parts in reinforced concrete structures is carried out. Based on the results of numerical modeling, new information about the stress-strain state in reinforced concrete elements from the local action of the tensile force has been obtained.

scholarly journals Reinforced concrete seismic design

1969 ◽  
Vol 2 (3) ◽  
pp. 217-250
Author(s):  
J. P. Hollings
Keyword(s):  
Reinforced Concrete ◽  
Structural Steel ◽  
Seismic Design ◽  
Rational Design ◽  
Structural Engineering ◽  
Construction Material ◽  
Concrete Structures ◽  
Design Procedure ◽  
Reinforced Concrete Structures ◽  
The University

This paper is reproduced from the proceedings of a
seminar on "Seismic Problems in Structural Engineering" arranged by the Departments of Civil Engineering and Extension Studies of the University of Canterbury, and held in Christchurch from May 13 to 16, 1968. Reinforced concrete, as customarily designed and detailed, and in contrast to structural steel, is essentially a brittle construction material. Brittleness can be a danger 
in regions prone to earthquakes. However, with due care in design and detailing, reinforced concrete structures can be made adequately ductile for good performance in earthquakes. This paper presents a rational design procedure to achieve ductility of reinforced concrete structures.

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