Increasing of Numerical Efficiency in Nonlinear Analysis of Reinforced Concrete Beam Elements

2009 ◽  
Author(s):  
M. Sekulovic ◽  
D. Milasinovic ◽  
D. Kovacevic
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Analysis ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Numerical Efficiency ◽  
Beam Elements

Modeling the operation of structures made of dispersed-reinforced concrete with an alternating dynamic load of high intensity

2021 ◽  
Vol 14 (3) ◽  
pp. 36-44
Author(s):  
S. Nikolenko ◽  
Svetlana Sazonova ◽  
Viktor Asminin
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Load ◽  
High Intensity ◽  
Concrete Beam ◽  
Static Load ◽  
Dynamic Compression ◽  
Experimental Studies ◽  
Reinforced Concrete Beam ◽  
Beam Elements ◽  
Laminated Structures

A study of the properties of dispersed-reinforced concrete and a study of the effect of dispersed reinforcement on the operation of structures was carried out, mainly with a static load of the same sign. Based on the results of experimental studies, a comparison was made of the work of dispersed-laminated structures under alternating dynamic action of high intensity with the work of reinforced concrete beam elements under similar influences. The results of experimental studies of cubes and prisms for static and dynamic compression are also presented. The results of experimental studies allow us to conclude that there is a significant effect of dispersed reinforcement on the operation of structures under the investigated influences and the feasibility of combined reinforcement of structures. The use of dispersed reinforcement in structures will increase the resistance of structures to such influences.

scholarly journals Shear force and torsion in reinforced concrete beam elements: theoretical analysis based on Brazilian Standard Code ABNT NBR 6118:2007

2012 ◽  
Vol 5 (5) ◽  
pp. 576-595
Author(s):  
R. Barros ◽  
J.S. Giongo
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Transverse Reinforcement ◽  
Hollow Section ◽  
Beam Elements ◽  
Space Truss ◽  
Standard Code ◽  
Brazilian Standard

Reinforced concrete beam elements are submitted to applicable loads along their life cycle that cause shear and torsion. These elements may be subject to only shear, pure torsion or both, torsion and shear combined. The Brazilian Standard Code ABNT NBR 6118:2007 [1] fixes conditions to calculate the transverse reinforcement area in beam reinforced concrete elements, using two design models, based on the strut and tie analogy model, first studied by Mörsch [2]. The strut angle θ (theta) can be considered constant and equal to 45º (Model I), or varying between 30º and 45º (Model II). In the case of transversal ties (stirrups), the variation of angle α (alpha) is between 45º and 90º. When the equilibrium torsion is required, a resistant model based on space truss with hollow section is considered. The space truss admits an inclination angle θ between 30º and 45º, in accordance with beam elements subjected to shear. This paper presents a theoretical study of models I and II for combined shear and torsion, in which ranges the geometry and intensity of action in reinforced concrete beams, aimed to verify the consumption of transverse reinforcement in accordance with the calculation model adopted As the strut angle on model II ranges from 30º to 45º, transverse reinforcement area (Asw) decreases, and total reinforcement area, which includes longitudinal torsion reinforcement (Asℓ), increases. It appears that, when considering model II with strut angle above 40º, under shear only, transverse reinforcement area increases 22% compared to values obtained using model I.

Nonlinear Analysis of Reinforced Concrete Beam by ANSYS

2013 ◽  
Vol 438-439 ◽  
pp. 663-666
Author(s):  
Xin Zhong Zhang ◽  
Lei Lei Liu ◽  
Ke Dong Tang
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Analysis ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Experimental Results ◽  
Analysis Software ◽  
Element Analysis ◽  
Ansys Analysis ◽  
The Finite Element Analysis ◽  
Calculation Results

This paper mainly uses ANSYS, the finite element analysis software, to make nonlinear analysis of reinforced concrete beam. The model simulating the test process was established, the calculation results of ANSYS are compared with the experimental results. The comparison shows that ANSYS analysis results are similar to experimental results, which indicates ANSYS analysis software can be used to simulate the mechanical property of reinforced concrete structures.

scholarly journals THE STRENGTH OF REINFORCED CONCRETE BEAM ELEMENTS UNDER CYCLIC ALTERNATING LOADING AND LOW CYCLE LOAD OF CONSTANT SIGN

Vestnik MGSU ◽  
2015 ◽  
pp. 36-50 ◽  
Author(s):  
Yuliya Anatol'evna Semina
Keyword(s):  
Reinforced Concrete ◽  
Crack Resistance ◽  
Strain State ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Constant Sign ◽  
Stress Strain ◽  
Beam Elements ◽  
Stress Strain State ◽  
The Impact

The behavior of reinforced concrete elements under some types of cyclic loads is described in the paper. The main aim of the investigations is research of the stress-strain state and strength of the inclined sections of reinforced concrete beam elements in conditions of systemic impact of constructive factors and the factor of external influence. To spotlight the problem of cyclic loadings three series of tests were conducted by the author. Firstly, the analysis of the tests showed that especially cyclic alternating loading reduces the bearing capacity of reinforced concrete beams and their crack resistance by 20 % due to the fatigue of concrete and reinforcement. Thus the change of load sign creates serious changes of stress-strain state of reinforced concrete beam elements. Low cycle loads of constant sign effect the behavior of the constructions not so adversely. Secondly, based on the experimental data mathematical models of elements’ strength were obtained. These models allow evaluating the impact of each factor on the output parameter not only separately, but also in interaction with each other. Furthermore, the material spotlighted by the author describes stress-strain state of the investigated elements, cracking mechanism, changes of deflection values, the influence of mode cyclic loading during the tests. Since the data on the subject are useful and important to building practice, the ultimate aim of the tests will be working out for improvement of nonlinear calculation models of span reinforced concrete constructions taking into account the impact of these loads, and also there will be the development of engineering calculation techniques of their strength, crack resistance and deformability.

Limit Analysis of 3D Reinforced Concrete Beam Elements

2012 ◽  
Vol 138 (3) ◽  
pp. 286-296 ◽  
Author(s):  
Kasper P. Larsen ◽  
Peter N. Poulsen ◽  
Leif O. Nielsen
Keyword(s):  
Reinforced Concrete ◽  
Limit Analysis ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Beam Elements
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