Analytical Investigations on Reinforced Concrete Beams (original) (raw)
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International Journal of Civil Engineering and Technology (IJCIET) Volume 13, Issue 9, September 2022, pp. 1-13, Article ID: IJCIET_13_09_001, 2022
The failure behavior of reinforced concrete beam structural elements was modeled using computer software, ANSYS, to create the study presented in this paper. This study's goal was to ascertain how lower concrete and steel quality affected the way single reinforced concrete beam structural parts failed under tensile failure conditions. In this investigation, eight specimens of a straightforward 200x400x3000 mm with 2D16 single-reinforced beam have been modeled. A concentrated load will be applied to the beam in the middle of the beam span until it is collapsed. According to the study's findings, the quality of steel does not significantly change when the ultimate load is a flexural crack, and neither does the quality of concrete, which results in a smaller flexural capacity but a larger deflection. The crack pattern is also not significantly affected by this change. According to SNI 2847:2019, the flexural capacity of the ANSYS software analysis is comparable to the simplified calculation analysis, with a discrepancy of adequately reasonable. It is advisable for the low concrete steam rength beam with a low grade of reinforcement, whilst the higher concrete strength by using high-grade rebar.
Reinforced concrete beams behaviour under static loads – in situ case study
Constructii: Journal of Civil Engineering Research, 2020
Sometimes there are reinforced concrete structures for which conventional computational methods are not sufficient to demonstrate their intended use. In-situ tests are conclusive to determine the ability of a structure to support additional loads, to determine its safety in the event of some design or construction deficiencies, degradation, or lack of design data. Thus, in-situ analysis validates the theoretical design approaches, in order to obtain data on the behavior of the studied elements. The aim of this paper is to present the groundwork and objectives of in-situ testing of reinforced concrete elements of buildings, with a view to possible structural assessments and to present the methods for carrying out the tests.
Parametric Study on Reinforced Concrete Beam using ANSYS
Civil and Environmental Research, 2014
Concrete structural components such as beams, columns, walls exist in various buildings and bridges. Understanding the response of these components of structures during loading is crucial for the development of an efficient and safe structure. Recently Finite Element Analysis (FEA) is also used to analyze these structural components. In this paper, four point bending analysis is carried out using reinforced concrete beam. The results of the beam with respect to mesh density, varying depths, use of steel cushions for support and loading points, effect of shear reinforcement on flexure behaviour, impact of tension reinforcement on behaviour of the beam are analyzed and discussed. Finite element software ANSYS 13.0 is used for modeling and analysis by conducting non linear static analysis.
FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE BEAMS THROUGH ANSYS SOFTWARE (Atena Editora)
FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE BEAMS THROUGH ANSYS SOFTWARE (Atena Editora), 2022
With the importance and need to advance knowledge in the project using reinforced concrete, the optimization of materials and clarification of the variables present within the project are sought. This work brings a three-dimensional computational model, through the finite element method, using the ANSYS software, version 18.0, for the study of reinforced concrete beams. As validations, the ET series beams tested by Leonhardt and Walther (1962) were used, and the numerical results were compared with the experimental values. From the analysis of the breaking stresses of the concrete, the steel bars and the stirrups, it was concluded that the results were satisfactory, showing that the proposed model brings great approximation to the projects of reinforced concrete beams.
IJMER
This study presents theoretical investigation that reinforced concrete and composite construction might be suitably combined to give a new structural material : composite reinforced concrete. To study theoretically the composite beam, non-linear three-dimensional finite elements have been used to analyze the tested beam. The 8-node brick elements in (ANSYS) are used to represent the concrete, the steel bars are modelled as discrete axial members connected with concrete elements at shared nodes assuming perfect bond between the concrete and the steel. The results obtained by finite element solution showed good agreement with experimental results. The main objective of the present investigation is to carry out a nonlinear analysis of reinforced concrete beams resting on elastic foundation. Material nonlinearities due to cracking of concrete, plastic flow, crushing of concrete and yielding of reinforcement are considered. Foundation representation is assumed linear using Winkler model. The reinforced concrete beam is modelled by using three dimensional finite elements with steel bars as smeared layers. The examples have been chosen in order to demonstrate the applicability of the modified computer program (Dynamic Analysis of Reinforced Concrete Beams on Elastic Foundations DARCEF ) by comparing the predicted behaviour with that from other experimental and analytical observations. The program modified in the present research work is capable of simulating the behaviour of reinforced concrete beams resting of Winkler foundation and subjected to different types of loading. The program solutions obtained for different reinforced concrete beams resting on elastic foundations are in good agreement with the available results. Maximum percentage difference in deflection is 15 %
Analysis of Reinforced Concrete Beams by Finite Segment Technique
Port-Said Engineering Research Journal, 2013
A finite segment numerical model, in the form of a computer program, for tracing the behavior of reinforced concrete (RC) beams from the initial loading stage up to failure is presented. The material nonlinear behavior is taken into account for both the concrete and reinforcing steel assuming perfect bond and linear strain distribution along the cross section. The effect of shear deformation is accounted for, while the torsional deformations and geometric nonlinearity are ignored. The load is applied incrementally and the equilibrium is ensured for every load step iteratively. The validity of the numerical model is established by comparing the predictions from the computer program with the response data acquired from published laboratory testing for several cases of simply supported beams with various dimensions. The comparison showed that the proposed model is suitable for simulating the bending behavior of simple beams (for a wide range of span to depth ratio); provided that an appropriate model for the reinforcing steel is chosen.
Structural Engineering, 2021
Reinforced concrete structures show a pronounced non-linear response, with cracking of concrete for service loads and reinforcement yielding and concrete crushing at ultimate load. With non-linear finite element (FE) analysis, the structural response can be captured, and such analyses have shown great potential to reveal higher load carrying capacity compared to simplified and linear analysis methods. A multi-level structural assessment strategy, developed in previous research, provides a framework for more advanced, successively improved analysis of reinforced concrete slabs. This report provides recommendations for practicing structural engineers on structural assessment using FE analysis. The focus is on enhanced assessment with non-linear FE analysis, and the scope is reinforced concrete slabs with limited membrane effects. The intention is to facilitate the use of non-linear analysis in engineering practice by providing detailed recommendations on how such analyses can be made to provide increased understanding of the structural behaviour and reliable estimations of the load-carrying capacity of concrete slabs. However, the framework presented is general, and the approach can in many aspects also be used for other types of reinforced concrete structures. The recommendations given here are based on previous research performed by the authors, information from literature and engineering judgement based on practical experience. They are intended to give conservative estimates of the load-carrying capacity, fulfilling the required safety level. The report includes a thorough description of the assessment strategy. The global safety format recommended for non-linear analysis is presented and its application for different assessment levels is described. Furthermore, recommendations on how to take deterioration into account are given. Non-linear FE analysis of concrete structures is presented together with general advices for its application. Furthermore, general recommendations are presented for simplified and linear analysis, corresponding to today's practice. For assessment with non-linear FE analysis, detailed recommendations for use in engineering practice are presented. Advices are given on idealization of the structure, choice of material models, determination of material parameters, modelling and analysis. Furthermore, the evaluation of structural response, determination of load carrying capacity and response under service conditions are described. For non-linear analysis with shell elements, resistance models on higher Level-of-Approximation according to Model Code 2010 are used. Finally, examples are showing the application of the strategy on two slabs tested in laboratory and one bridge deck slab.
Analysis of Three Dimensional Horizontal Reinforced Concrete Curved Beam Using Ansys
Reinforced concrete horizontally curved beams are extensively used in many fields, such as in the construction of modern highway intersections, elevated freeways, the rounded corners of buildings, circular balconies,….etc. In some of these cases, large depths are needed for curved beams in order to resist high loads or to fulfill some aesthetic purposes. The analytical analysis of such members is very complex due to the fact that those members are subjected to combined action of bending, shear and torsion. Furthermore, non homogeneous nature of the materials involved contributes to the complexity of the problem. Therefore, it becomes necessary to employ numerical analysis procedures, such as the finite element method, to satisfy the safety and the economy requirements.A horizontally curved beam, loaded transversely to its plane, is subjected to torsion in addition to bending and shear. Furthermore, in deep beam the plane section does not remain plane after bending because of high stresses and warping occurs. Therefore, special features of analysis and design for horizontally curved deep beams is necessary to include the effect of above mentioned factors. Several methods of collapse analysis , and Abul Mansur and Rangan 1981 were proposed for analysis of specific cases of reinforced concrete curved beams. However, till yet studies concerning reinforced concrete horizontally curved deep beams are rare. At present, with the application of digital computers beside the development of numerical methods, the mathematical difficulties associated with curved deep beam have been largely overcome. One of the most effective numerical methods utilized for analyzing reinforced concrete members is the finite element method. Using this method, many aspects of the phenomenological behaviour of reinforced concrete structures can be modelled rationally. These aspects include the tension-stiffening, non-linear multiaxial material properties, modelling of cracking and crushing, and many other properties related to the behaviour of reinforced concrete members under stresses. An important utilization of the finite element method is the modelling of the degradation of concrete compressive strength in the presence of transverse tensile straining as happens in members subjected dominantly to torsion or shear stresses. Therefore, the present study adopted a three dimensional non-linear finite element model to investigate the behaviour and the load carrying capacity of reinforced concrete horizontally curved deep beams.
Modeling of Reinforced Concrete Beams with and Without Opening by Using Ansys
2009
This paper presents the procedures of constructing an ANSYS nonlinear finite element model for reinforced concrete beam analysis. This model was used to analyze reinforced concrete beams with and without openings. The results were compared with the experimental results of fullscale laboratory tests made experimentally. Beams strength, stiffness, deformed shape, and cracking patterns were investigated. The comparison between experimental and analytical results showed acceptable agreement.