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Birendra Kumar Singh,
Abstract
This study investigates the influence of variations in beam geometry, span, load intensity, and
permissible stresses on the structural behavior of reinforced concrete beams. Using classical bending
and shear stress formulations, the effects of a 20% increase in key parameters were analytically
evaluated. Results indicate that a 20% increase in beam span leads to a proportional 20% increase in
beam depth, whereas a 20% increase in beam width or permissible compressive stress in bending
results in an 8.68% reduction in beam depth. Shear stress analysis shows that an increase in load
intensity by 20% raises shear stress by approximately 9.48%, while changes in span have no effect on
shear stress. Increasing beam width reduces shear stress by about 8.90%, whereas higher permissible
compressive stress indirectly increases shear stress due to reduced beam depth. Compressive stress at
the column increases by nearly 19.85% with a 20% rise in load intensity and must remain within
permissible limits. Flexural stress increases proportionally with load intensity and rises significantly
(44%) with increased span for a given beam depth, while greater beam width reduces flexural stress.
Tensile stress, governed by the total load and cross-sectional area, increases linearly with load intensity
but decreases with increased beam width and depth. The study also highlights the interrelation between
stress development and deflection, emphasizing the importance of optimized beam dimensions to ensure
structural safety and serviceability under varying loading and geometric conditions.
Keywords: Beam geometry, deflection analysis, flexural stress, load intensity, permissible stress, RCC design, reinforced concrete beam, shear stress, span variation, tensile stress.
Birendra Kumar Singh. Effect of Span, Load Intensity, and Beam Geometry on Stress and Deflection Behavior of RCC Beams. Journal of Structural Engineering and Management. 2026; 13(01):-.
Birendra Kumar Singh. Effect of Span, Load Intensity, and Beam Geometry on Stress and Deflection Behavior of RCC Beams. Journal of Structural Engineering and Management. 2026; 13(01):-. Available from: https://journals.stmjournals.com/josem/article=2026/view=239110
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Journal of Offshore Structure and Technology
| Volume | 13 |
| 01 | |
| Received | 01/01/2026 |
| Accepted | 04/01/2026 |
| Published | 09/01/2026 |
| Publication Time | 8 Days |
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