Effect of Opening Size and Location on the Shear Strength Behavior of R.C Deep Beams without Web Reinforcement
Hawraz Karim M. Amin1, V.C. Agarwal2, Omar Q. Aziz3
1Hawraz Karim M.Amin, Tech, Department of Civil Engineering, Shepherd Engineering and Technology, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad (U.P), India.
2V.C. Agarwal, Professor & Head, Department of Civil Engineering, SSET, Shiats, Allahabad (U.P), India.
3Omar Q. Aziz, Assistant Professor, Department of Civil Engineering, College of Engineering, University of Salahaddin-Erbil, Iraq.
Manuscript received on 8 December 2013 | Revised Manuscript received on 18 December 2013 | Manuscript Published on 30 December 2013 | PP: 28-38 | Volume-3 Issue-7, December 2013 | Retrieval Number: G1379123713/13©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper is carried out to study the effect of opening Sizes and Locations on the Shear strength behavior of reinforced concrete deep beams without web reinforcement, the opening size and location were main factors included in the present work, Variation of Parameters (l/d, a/d, fc and maximum size of aggregate) which affect the behavior of R.C deep beams are taken into account, a nonlinear analysis using the finite element method with (Ansys+CivilFEM) release 12.0 program was used to predict the ultimate Shear and mode of failure for reinforced concrete deep beams with openings, Materials nonlinearities due to cracking, crushing of concrete and yield conditions of the reinforcing steel are considered. The capabilities of the proposed model have been examined and demonstrated by analyzing available experimental eleven reinforced concrete deep beams without openings which showed a good agreement with difference for ultimate Shear a bout (6.4%), then after validation the program 99 models were created with square web openings having 3 sizes at 3 locations in each model to study their effect on the shear stress, (Ansys+CivilFEM) software was found completely efficient in handling such analysis and the proposed simulation of the material in the present study are capable of Predicting the behavior of reinforced concrete Deep Beams with Openings of Different Sizes and Locations, the results showed that location of openings has a large effect, where this effect is the largest when openings is provided at shear zone where sharp decrease in the ultimate Shear was observed and Mid-span location showed small effect and the ultimate Shear increases with decrease for the size of openings. The effect of parameters (l/d, a/d, fc, and maximum size of aggregate) are observed where changing l/d from 2.42 to 8.4 and (a/d) from 1 to 2.5 has high significant effect in decreasing the shear strength but increasing (a/d) from 1.5 to 2.25 for (l/d) of 4.61 and maximum size of aggregate from 9.5mm to 19mm has a very little effect while increasing the compressive strength of concrete increases the ultimate Shear Strength in different rates for varied opening locations and sizes.
Keywords: Deep Beams, Web Opening Effect, Shear Strength Behavior, (Ansys+Civilfem)
Scope of the Article: Behaviour of Structures