## modeling torsional strength of reinforced concrete beams

# modeling torsional strength of reinforced concrete beams

### Modeling Torsional Strength of Reinforced Concrete Beams ...

10% Jun 27, 2019 The potential of using genetic programming to predict engineering data has caught the attention of researchers in recent years. This paper utilizes a derivative of genetic programming to model the torsional strength of reinforced concrete beams using polynomial-like equations. Furthermore, the calculation results of current building codes are introduced into the

get price### Torsional strength of normal and high strength reinforced ...

Nov 01, 2013 A simple non-iterative method for the calculation of the ultimate torsional moment in reinforced concrete beams was presented. The main equation in the model relates the torsional strength to the amount and strength of the longitudinal and transverse reinforcement, the concrete compressive strength and the outer area of the cross section.

get price### Torsional strength of normal and high strength reinforced ...

This paper proposes a simple non-iterative model for the calculation of the ultimate torsional moment in normal-strength and high-strength concrete beams. The two equations of the model relate the torsional strength to the amount and strength of the hoop and the longitudinal reinforcement, the concrete compressive strength, and the outer area ...

get price### Refined Model to Estimate Torsional Strength of Reinforced ...

Oct 01, 1996 Title: Refined Model to Estimate Torsional Strength of Reinforced Concrete Beams Author(s): M. Asghar Bhatti and Anan Almughrabi Publication: Structural Journal Volume: 93 Issue: 5 Appears on pages(s): 614-622 Keywords: concrete beams; finite elements; skew-bending theory; space truss analogy; torsion; torsional resistance. Date: 10/1/1996 Abstract: The finite element method

get price### Torsional strength of reinforced concrete beams

Torsional strength of reinforced concrete beams Khaldoun N. Rahal Abstract: A simple method for predicting the ultimate strength and mode of failure of reinforced concrete beams sub-

get price### Torsional Strengthening of Reinforced Concrete Beams Using ...

adequate torsional strength is through application of externally bonded carbon fiber reinforced polymers (CFRP). To date, American Concrete Institute (ACI) code, as well as other building codes, do not have recommendations or provisions for strengthening RC beams for torsion using fiber-reinforced polymer (FRP) composites due to the inexistence ...

get price### Simplified Model for the Torsional Strength of Concrete ...

An international committee on shear and torsion reported that giving physical significance for the torsion design is an upcoming challenge. The purpose of this paper is to propose a reasonably accurate and relatively simple model capable of predicting the torsional strength of concrete beams reinforced with glass fiber–reinforced polymer (GFRP) stirrups.

get price### Refined Model to Estimate Torsional Strength of Reinforced ...

Oct 01, 1996 Title: Refined Model to Estimate Torsional Strength of Reinforced Concrete Beams Author(s): M. Asghar Bhatti and Anan Almughrabi Publication: Structural Journal Volume: 93 Issue: 5 Appears on pages(s): 614-622 Keywords: concrete beams; finite elements; skew-bending theory; space truss analogy; torsion; torsional resistance. Date: 10/1/1996 Abstract: The finite element method

get price### TORSIONAL STRENGTH OF REINFORCED AND PRESTRESSED CONCRETE ...

TORSIONAL STRENGTH OF REINFORCED AND PRESTRESSED CONCRETE BEAMS--CEB APPROACH. Besides a "Standard Method" derived from semi-empirical considerations the new CEB model code proposes a "Refined Method" for the design of reinforced and prestressed concrete members subjected to torsion. It is compatible with the design method for bending and shear ...

get price### Torsional Strengthening of Reinforced Concrete Beams Using ...

Aug 01, 2016 Concrete torsional strength was obtained using the ACI code equations and superposition. is used to combine the CFRP and concrete strengths for the total strength. Experimental. results, as seen in the table above, match fairly well the analytical models for full and. strip wrapped beams, but not necessarily for the U-wrapped beam. FIB used an

get price### Neuro-Fuzzy modeling of torsional strength of RC beams ...

Jun 25, 2012 This paper presents Neuro-Fuzzy (NF) based empirical modelling of torsional strength of RC beams for the first time in literature. The proposed model is based on fuzzy rules. The experimental database used for NF modelling is collected from the literature consisting of 76 RC beam tests. The input variables in the developed rule based on NF model are cross-sectional area of beams, dimensions of ...

get price### Maximum torsional reinforcement ratio of reinforced ...

Feb 01, 2020 Maximum torsional reinforcement derived theoretically for reinforced concrete beam. • Based on the truss model and thin-walled tube theory. • A Simple equation for maximum torsional reinforcement considering key parameters. • Relatively good accuracy estimating failure modes of specimens under pure torsion.

get price### Test on pure torsion behavior of channel steel reinforced ...

This paper totally reports the results of 8 pure torsion tests on channel steel reinforced concrete beams (CSRCB) and one pure torsion test on normal reinforced concrete contrast beam. The variables studied were the concrete strength, the configuration form of stirrup, and the form, angle, spacing of lace bar.

get price### BEHAVIOURAL MODEL OF FRP STRENGTHENED

Reinforced Concrete Laboratory, Greece. Email: [email protected] ABSTRACT The present study addresses an analytical method for the prediction of the entire torsional behaviour of reinforced concrete (RC) beams strengthened with externally bonded fibre-reinforced-polymers (FRP) materials.

get price### Strength of steel fiber reinforced concrete beams in pure ...

Jan 04, 2018 This paper presents a simple yet accurate technique for determining the strength of steel fiber reinforced concrete beams loaded in pure torsion. The results of the model are compared with 21 beams found in the literature as well as two new beams tested by the authors and reported herein.

get price### ABAQUS modeling for post-tensioned reinforced concrete beams

In reinforced concrete, there is particular difficulty with respect to the bond-slip relationship between concrete and steel. However, in this paper the finite element analysis for concrete beams through ABAQUS simulation has been carried out with some assumptions, including perfect bond of steel and concrete and the CDP model for concrete ...

get price### Wight, Reinforced Concrete: Mechanics and Design [RENTAL ...

Accessible, up-to-date coverage of reinforced concrete design UPDATED -The latest 2019 ACI Building Code Requirements are integrated throughout the text.All chapters and examples have been updated to comply with the latest code. Beginner and advanced subjects are presented in the same chapters, making the text suitable for both undergraduate and graduate students.

get price### Genetic-programming-based modeling of RC beam torsional ...

May 08, 2010 This study investigates the use of Genetic Programming (GP) to model Reinforced Concrete (RC) beam torsional strength. Experimental data of 76 rectangular RC beams from an existing database were used to develop the GP model. The following input parameters, which affect torsional strength, were selected: beam cross-sectional area, closed stirrup dimensions, stirrup

get price### Simplified Model for the Torsional Strength of Concrete ...

An international committee on shear and torsion reported that giving physical significance for the torsion design is an upcoming challenge. The purpose of this paper is to propose a reasonably accurate and relatively simple model capable of predicting the torsional strength of concrete beams reinforced with glass fiber–reinforced polymer (GFRP) stirrups.

get price### Torsional Strengthening of Reinforced Concrete Beams Using ...

Aug 01, 2016 Concrete torsional strength was obtained using the ACI code equations and superposition. is used to combine the CFRP and concrete strengths for the total strength. Experimental. results, as seen in the table above, match fairly well the analytical models for full and. strip wrapped beams, but not necessarily for the U-wrapped beam. FIB used an

get price### TORSIONAL STRENGTH OF REINFORCED AND PRESTRESSED CONCRETE ...

TORSIONAL STRENGTH OF REINFORCED AND PRESTRESSED CONCRETE BEAMS--CEB APPROACH. Besides a "Standard Method" derived from semi-empirical considerations the new CEB model code proposes a "Refined Method" for the design of reinforced and prestressed concrete members subjected to torsion. It is compatible with the design method for bending and shear ...

get price### Torsional Strengthening of Reinforced Concrete Beams

adequate torsional strength is through application of externally bonded carbon fiber reinforced polymers (CFRP). To date, American Concrete Institute (ACI) code, as well as other building codes, do not have recommendations or provisions for strengthening RC beams for torsion using fiber-reinforced polymer (FRP) composites due to the inexistence ...

get price### Neuro-Fuzzy modeling of torsional strength of RC beams ...

Jun 25, 2012 This paper presents Neuro-Fuzzy (NF) based empirical modelling of torsional strength of RC beams for the first time in literature. The proposed model is based on fuzzy rules. The experimental database used for NF modelling is collected from the literature consisting of 76 RC beam tests. The input variables in the developed rule based on NF model are cross-sectional area of beams, dimensions of ...

get price### Torsional Strength of Reinforced and Prestressed Concrete ...

Title: Torsional Strength of Reinforced and Prestressed Concrete Beams-CEB Approach Author(s): Burno Thurlimann Publication: Symposium Paper Volume: 59 Issue: Appears on pages(s): 117-144 Keywords: beams (supports); bending; prestressed concrete; reinforced concrete; shear properties; structural design; torsion Date: 1/1/1979 Abstract: Besides a "Standard Method" derived from semi

get price### Using radial basis function neural networks to model ...

Oct 25, 2006 The application of radial basis function neural networks (RBFN) to predict the ultimate torsional strength of reinforced concrete (RC) beams is explored in this study. A database on torsional failure of RC beams with rectangular section subjected to pure torsion was retrieved from past experiments in the literature; several RBFN models are sequentially built, trained and tested.

get price### Predicting Of Torsional Strength Of Prestressed Concrete ...

Abstract—In this paper, the artificial neural networks (ANNs) model in predicting the torsional strength of prestressed concrete beams is done. Experimental data of eighty two rectangular prestressed concrete beams under pure torsion from an existing available literature were used to develop ANN torsion model.

get price### Size Effect in Torsional Strength of Plain and Reinforced ...

torsional strength has been studied only for beams without stirrups, which are not used in practice when torsion domi-nates. These previous studies, which included rectangular plain concrete beams and reinforced concrete beams without stirrups made with reduced-size aggregate,4,5,14 documented

get price### By Mahmoud E. Kamara, Ph.D., and Basile G. Rabbat, Ph.D ...

Dec 19, 2006 When a concrete beam is subjected to a torsional moment, shear stresses lead to diagonal tensile stresses. When the diagonal tension exceeds 4 f ca, where f′c = the specified compressive strength of concrete in pounds per square inch (psi), diagonal cracks spiral around the beam. After crack-

get price### TORSION OF HIGH-STRENGTH REINFORCED CONCRETE BEAMS

To study the effect of high-strength (HS) concrete on torsional behavior of reinforced concrete (RC) beams, 9 full-size beams were tested under pure torsion. The main study parameters were concrete strength and amount of reinforcement. Concrete strength ranged from normal through all grades of HS concrete.

get price### Strength of steel fiber reinforced concrete beams in pure ...

Jan 04, 2018 This paper presents a simple yet accurate technique for determining the strength of steel fiber reinforced concrete beams loaded in pure torsion. The results of the model are compared with 21 beams found in the literature as well as two new beams tested by the authors and reported herein.

get price### Torsion Of Reinforced Concrete Beams

analyzing a reinforced concrete member. In the second part we will present the results of the experiments made on 15 reinforced concrete and unreinforced concrete beams loaded by pure torsion, and compare the results obtained by the above mentioned methods with the results calculated by Eurocode2 and the Hungarian Code.

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