DYNAMIC MAGNIFICATION FACTOR FOR CONCRETE WIDE BEAM UNDER FREE FALL LOADING

Abstract

Present endeavor is devoted to investigate the dynamic magnification factor of concrete wide beams contain different sizes of steel fibers under the effect of impact forces. Many parameters were considered in the current work namely central wide beam deformation, length of the used steel fibers and failure modes of the wide beams. Twenty two wide beams have been used to perform current impact test. A finite element model has been constructed with considering 3D solid elements to simulate the performance of the wide beam. It is observed that the computed dynamic magnification factor of the beam is decreased with introducing long steel fibers in the concrete wide beam member. Good matching with correlation more than 80% has been found between present finite element modeling results and the experimental outcomes with using four-noded solid elements in the analysis

Keywords

• dynamic magnification factor, free fall objects, concrete wide beam, three-dimensional finite element

References

1. American Concrete Institute ACI committee-318 Code, Requirements for structural concrete and commentary, 1971.
2. American Concrete Institute ACI committee-318 Code, Requirements for structural concrete and commentary, 2005.
3. Prota, A., Tan, K.Y., Nanni, A., Pecce, M., Manfredi, G., Performance of shallow reinforced concrete beams with externally bonded steel-reinforced polymer. ACI Structural Journal, 103(2), 163-170, 2006.
4. Ozbolt, J., Sharma, A., Numerical simulation of reinforced concrete beams with different shear reinforcements under dynamic impact loads. International Journal of Impact Engineering, 38, 940950, 2011.
5. Brandon, D.G., Dynamic loading and fracture, Blazynski TZ, editor. Materials at high strain rates. Elsevier, 187-218. 1987
6. Ozbolt, J., Rah, K.K., Mestrovic, D., Influence of loading rate on concrete cone failure. International Journal of Fracture, 139, 239-252, 2006.
7. Ozbolt, J., Sharma, A., Reinhardt, H.W., Dynamic fracture of concrete compact tension specimen. International Journal of Solids and Structures, 48, 1534-1543, 2011.
8. Saatci, S., Vecchio, J.V., Effect of shear mechanisms on impact behavior of reinforced concrete beams. ACI Structural Journal, 106(1), 78-86, 2009.

9. Travas, V., Ozbolt, J., Kozar, I., Failure of plain concrete beam at impact load: 3D finite element analysis. International Journal of Fracture, 160, 31-41, 2009.
10. ACI Committee 544, State of the art report on fiber reinforced concrete, Fiber reinforced concrete int., symposium. Detroit: ACI Publication, SP-81, 1984.
11. Hsu, L.S., Hsu, C.T.T., Stress-strain behavior of steel-fiber high-strength concrete under compression. ACI Structural Journal, 91(4), 448–457, 1994.
12. Abdul-Razzak, A.A., Mohammed Ali, A.A., Modelling and numerical simulation of high strength fibre reinforced concrete corbels. Applied Mathematical Modeling Journal, 35(6), 2901– 2915, 2011.
13. Abdul-Razzak, A.A., Mohammed Ali, A.A., Influence of cracked concrete models on the nonlinear analysis of high strength steel fibre reinforced concrete corbels. Composite Structures, 93, 2277–2287, 2011.
14. Haido, J.H, Prediction of static behavior for SFRC deep beams using new and simple nonlinear models, Caspian Journal of Applied Sciences Research, 1(5), 1-26, 2012.
15. Haido, J.H., Investigation of SFRC corbel performance using a developed nine-noded lagrangian elements. ARPN Journal of Engineering and Applied Sciences, 7(8), 963-970, 2012.
16. Khoo S.Y., Ismail Z., Kong K.K., Ong Z.C., Noroozi S., Chong W.T., Rahman A.G.A., Impact force identification with pseudo-inverse method on a lightweight structure for under-determined, even-determined and over-determined cases. International Journal of Impact Engineering, 63, 52-62, 2014.
17. Liu, J., Han, X., Computational inverse procedure for identification of structural dynamic loads computational mechanics, Heidelberg: Springer Berlin; 2009. p. 323.
18. Zhao, C.F., Chen, J.Y., Damage mechanism and mode of square reinforced concrete slab subjected to blast loading. Theoretical and Applied Fracture Mechanics, 63–64, 54–62, 2013.
19. Liu, F., Chen, G., Li, L., Guo, Y., Study of impact performance of rubber reinforced concrete. Construction and Building Materials, 36, 604–616, 2012.
20. Building Research Center-Scientific Research Council of Iraq, Iraqi building code requirements for reinforced concrete, Code 1, 1987.
21. Rao, H.S., Ghorpade, V.G., Ramana, N.V,, Gnaneswar, K., Response of SIFCON two-way slabs under impact loading. International Journal of Impact Engineering, 37, 452–458, 2010.
22. Akin, J. E., Impact load factors. https://www.clear.rice.edu/mech403/HelpFiles/ImpactLoadFactors.pdf, 2013.
23. Karnovsky, I.A., Lebed, O, Advanced Methods of Structural Analysis, Springer Science+Business Media, LLC, 2010.
24. ANSYS, Inc., Element reference, SAS IP, Inc., 2009.