Assessment of plastic rotation and applied load in reinforced concrete, steel and timber beams using image-based analysis

2019 ◽  
Vol 198 ◽  
pp. 109519
Author(s):  
Ricardo N.F. Carmo ◽  
Jonatas Valença ◽  
Francesco Bencardino ◽  
Stefano Cristofaro ◽  
Domenico Chiera
Keyword(s):  
Reinforced Concrete ◽  
Applied Load ◽  
Plastic Rotation ◽  
Timber Beams

scholarly journals A Parametrical Analysis for the Rotational Ductility of Reinforced Concrete Beams

2013 ◽  
Vol 7 (1) ◽  
pp. 242-253
Author(s):  
Domenico Raffaele ◽  
Giuseppina Uva ◽  
Francesco Porco ◽  
Andrea Fiore
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Concrete Beams ◽  
Closed Form Solution ◽  
Form Solution ◽  
Reinforced Concrete Beams ◽  
Shear Cracks ◽  
Technical Standards ◽  
Mechanical Reinforcement ◽  
Plastic Rotation

The assessment of the plastic rotation of reinforced concrete beams is an essential aspect to avoid structural brittle collapses. The value actually available can be generally determined as sum of two different components. The first, due to bending, the second for inclined shear cracks. This paper presents a simplified model which provides the flexural plastic rotation of the rectangular beams with a ``closed-form solution''. The approach is substantially dimensionless and includes main influencing factors the cross -section, as mechanical material properties, ductility, geometrical and mechanical reinforcement ratio, confinement effects. In closing, in order to appreciate the reliability of the procedure, a comparison with models proposed by international technical standards is made.

scholarly journals CAPACITY FLEXIBLE COMPRESSED REINFORCED CONCRETE ELEMENTS REINFORCED WITH STEEL SHEETS

2018 ◽  
Vol 1 (50) ◽  
pp. 79-87
Author(s):  
L. I. Storozhenko ◽  
S. O. Murza ◽  
О. І. Yefimenko
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Carrying Capacity ◽  
Applied Load ◽  
Experimental Studies ◽  
Load Bearing Capacity ◽  
Steel Reinforced Concrete ◽  
Steel Sheets ◽  
Dependence Graphs ◽  
Concrete Elements

The experimental studies results of reinforced concrete elements with sheet reinforcement load bearing capacity are presented. The drawing of experimental designs is shown. The bearing capacity dependence graphs of the tested steel-reinforced concrete samples with sheet reinforcement on the height of the element and dependence graphs of tested steel-reinforced concrete samples with sheet reinforcement carrying capacity on the applied eccentricity are constructed. The photo shows the destruction character of experimental steel-concrete samples with sheet reinforcement depending on their height. The general schedule of bearing capacity dependence on the height of the element and the eccentricity of the applied load is constructed.

Approaches to Determine Material Model of Fibre Reinforced Concrete

2020 ◽  
Vol 309 ◽  
pp. 240-245
Author(s):  
Martin Tipka ◽  
Jitka Vašková
Keyword(s):  
Reinforced Concrete ◽  
Fracture Energy ◽  
Structural Design ◽  
Applied Load ◽  
Material Model ◽  
Fibre Reinforced Concrete ◽  
Brittle Matrix ◽  
Reinforced Composite ◽  
Before And After

The paper deals with possible ways of defining the material model of fibre reinforced concrete as a material for structural design. The material model is a tool that can be used to describe response of material to the applied load. It usually includes several different parameters: strengths, ultimate deflections, deformation modules, fracture energy, etc. The paper deals with the problematic phases of tests that are necessary to create a material model, but which may not always provide relevant data. Due to the nature of the material (a fibre reinforced composite with a relatively brittle matrix), it is necessary to analyse separately the behaviour of the material before and after cracks when creating the material model.

scholarly journals Reassessment of the flexural behavior of high-strength reinforced concrete beams under short-term loads

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Jorge Luis Palomino Tamayo ◽  
Gabriel Orso Garcia
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Response ◽  
High Strength ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Short Term ◽  
Cross Sectional ◽  
Plastic Rotation ◽  
Flexural Ductility ◽  
Sectional Analysis

AbstractThis work aims at describing the behavior of high-strength reinforced concrete (HSRC) beams under short-term ultimate loads with concrete compressive strengths higher than 50 MPa. A plastic approach besides a cross sectional analysis is employed to primarily trace the nonlinear response of nineteen HSRC simply supported beams for which experimental results are available. This proposed theoretical approach is able to acceptably match the experimental data with minor overestimation of flexural moments. Closed-form expressions to evaluate ductility indexes regarding deflections and curvatures as well as plastic rotation capacities are also proposed herein. Predictions of the National Brazilian Regulation for design of concrete structures NBR6118 in terms of ultimate flexural moments are also computed for comparison. A complete assessment of ductility in which plastic rotation capacities are computed for the studied beams is also given. It is found that the flexural ductility of a member could be increased with the use of high strength concrete. The use of a maximum tension steel ratio to guarantee a minimum flexural of ductility is highlighted.

The Experimental Research on the Reinforced Concrete Beam Performance of Crack Repair

2013 ◽  
Vol 671-674 ◽  
pp. 902-905
Author(s):  
Fang Zhang ◽  
Jin Feng Hao ◽  
Gui De Liu ◽  
Jin Feng Gao
Keyword(s):  
Reinforced Concrete ◽  
Experimental Research ◽  
Concrete Beam ◽  
Applied Load ◽  
Reinforced Concrete Beam ◽  
Crack Repair

The reinforced concrete simple-supported beams are made, applied load continuously until there product crack in them. Then, we select the binder to repair the crack and load them secondly. We verify the performance of the binder by experiment.

scholarly journals Performance of Reinforced Concrete Beams with Implanted Columns

2018 ◽  
Vol 8 (01) ◽  
Author(s):  
Ahmed S. Rashed ◽  
Yasser R. Zaghloul
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Applied Load ◽  
Failure Load ◽  
Concrete Beams ◽  
Full Scale ◽  
Steel Reinforcement ◽  
Reinforced Concrete Beams

The main aim of this study is to specify the behavior of the beams related to the carried implanted column corresponding to the column direction and its location in both bending and shear cases and to give some recommendations and specifications which can be taken into consideration while the design of beams has an implanted column. The experimental study was achieved by testing five full-scale beams with respect to the failure load, deflection and strain in steel reinforcement. Results showed that the best position for the implanted column in the bending case is when the length of the implanted column is perpendicular to beam span. Furthermore, the design of the beam is sufficient and conservative in presence of implanted column near the support to satisfy the shear formed by the applied load.

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