Study of Shear Transfer in Modified Push-Off Members Using Finite Elements Method

A Comparative Study

Keywords: Shear, aggregate interlock, finite element method, interface, modified push-off

Abstract

This paper aims to investigate numerical study onto the behavior of modified push-off specimens under the action of direct shear stress. Based on the tow-dimensional finite element model developed in this research, the contribution of the aggregate interlock to resist the shear stress along the shear plane, the effect of existing of the compressive stress acting across the shear plane, the effect of the parallel reinforcement in resisting shear stress, the effect of the shear reinforcement parameter, the strains in the concrete and steel and the actual distribution of the shear stress along the shear plane were studied. To verify the accuracy and applicability of the suggested finite element model, a comparison between the results obtained in this study and those obtained experimentally by other authors was carried out. Comparison showed that the finite element results were in good agreement with the experimental results. It has been found that, for modified push-off specimens of groups without shear reinforcement across the shear plane the diagonal tension crack within the shear plane occurred at the load level which is closely to the ultimate shear strength respectively, while for specimens with both shear and parallel reinforcement , the first crack formed at about (33.7% - 53.0%) of the ultimate strength , also the investigation showed that the presenting of the shear reinforcement normal to the shear plane are significantly increased the shear transfer stress for all levels of loading.

Downloads

Download data is not yet available.

Author Biography

Sabih H. Muhodir, Department of Architectural Engineering, Cihan University-Erbil, Kurdistan Region, Iraq

Sabih H. Muhodir is a professor at the Department of Architectural Engineering, College of Engineering Cihan University-Erbil. He got the B.Sc. degree in Civil Engineering, the M.Sc. degree in Structural Engineering and the Ph.D. degree in Structural Engineering. His research interests are in Analysis and Design of Concrete and steel Structures, Dynamic behavior of High-Rise Building. Dr. Sabih is a member of Iraqi and Kurdistan Engineering Syndicate and UAE Engineering Society.

References

L. Ahmed and A. Ansell. Direct shear strength of high strength fiber concrete. Magazine of Concrete Research, vol. 62, no. 5, pp. 379-390, 2010.

P. M. D. Santoa and E. N. B. Julio. A state-of-the-art review on shear friction. Engineering Structures, vol. 45, no. 1, pp. 435-448, 2012.

K. H. Yang, J. I. Sim, J. H. Kang and A. F. Ashour. Shear capacity of monolithic concrete joints without transverse reinforcement. Magazine of Concrete Research, vol. 64, no. 9, pp. 767-779, 2012.

K. A. Harries, G. Zeno and B. Shahrooz. Toward an improved understanding of shear-friction behavior. ACI Structural Journal, vol. 109, no. 6, pp. 835-844, 2012.

K. N. Rahal. Simplified design and capacity calculation of shear strength in reinforced concrete membrane elements. Engineering Structures, vol. 30, no. 10, pp. 2782-2791, 2008.

American Concrete Institute. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary. American Concrete Institute, Farmington Hills, MI, USA, 2019.

T. T. C. Hsu. Unified approach to shear analysis and design. Cement and Concrete Composites, vol. 20, no. 89, pp. 419-435, 1998.

B. J. Al-Sulayvani and J. R. Al-Feel. Effect of direct compressive stress on the shear transfer strength of fibrous concrete. Al Rafidain Engineering, vol. 17, no. 2, pp. 65-75, 2009.

S. Mahmoodreza and B. E. Ross. Database evaluation of interface shear transfer in reinforced concrete members. ACI Structural Journal, vol. 114 no. 2, pp. 383-394, 2017.

M. Soltani, B. E. Ross and A. Khademi. A statistical approach to refine design codes for interface shear transfer in reinforced concrete members. ACI Structural Journal, vol. 115, no. 5, pp. 1341, 2018.

A. H. Mattock and N. M. Hawkins. Shear transfer in reinforced concrete-recent research. PCI Journal, vol.17, no. 2, pp. 55-75, 1972.

R. N. Khaldoun. Shear-transfer strength of reinforced concrete. ACI Structural Journal, vol. 107, no. 4, p. 346, 2010.

W. F. Chen. Plasticity in Reinforced Concrete. McGraw Hill, New York, 1982.

E. Hinton and D. R. J. Owen. Finite Element Programming. Vol. 90. Academic Press, Inc., Cambridge, p. 345, 1977.

A. J. Al-Sharae. Experimental and Analytical Study of Shear Transfer in Reinforced Concrete Members Made with Abu-Ghar Limestone as a Coarse Aggregate. M.Sc. Thesis, University of Basrah, Iraq, 1999.

Published
2022-08-27
How to Cite
1.
Muhodir S. Study of Shear Transfer in Modified Push-Off Members Using Finite Elements Method. cuesj [Internet]. 27Aug.2022 [cited 1Oct.2022];6(2):81-8. Available from: https://journals.cihanuniversity.edu.iq/index.php/cuesj/article/view/655
Section
Research Article