Shear Strength Analysis in Reinforced Concrete Structures
Summary
Shear strength in reinforced concrete structures is the capacity of a beam or slab to resist forces that cause sliding failure along planes roughly parallel to the applied load. It is governed by a combination of mechanisms including aggregate interlock, dowel action of reinforcing bars and the arch or truss action formed between concrete compression struts and tension ties. Key parameters influencing shear capacity include the shear span-to-depth ratio, the amount and yield strength of longitudinal reinforcement, transverse reinforcement spacing, and concrete compressive strength. Diagonal cracking is the most common manifestation of shear distress, initiating when tensile stresses exceed the concrete’s tensile capacity. Analytical models range from simplified truss analogies to more advanced modified compression field theories and finite-element models that account for crack formation and propagation. Contemporary research addresses not only fundamental mechanisms but also practical challenges such as structural health monitoring, model calibration against large-scale tests and the integration of sustainability goals through novel material grading. The accurate prediction of shear resistance directly impacts structural safety, serviceability and economy across applications from bridge decks to high-rise cores, and informs global code evolution in pursuit of resilient and resource-efficient infrastructure.
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Shear Strength Analysis in Reinforced Concrete Structures publication trend
The graph below shows the total number of articles in shear strength analysis in reinforced concrete structures across all publications each year (not limited to Nature Index journals).
Technical terms
Shear span-to-depth ratio (a/d): The ratio of shear span (distance from load to support) to beam depth, influencing diagonal crack pattern and shear capacity.
Aggregate interlock: Force transfer mechanism across a crack due to rough surfaces of coarse aggregate engaging under compression.
Dowel action: Shear resistance provided by longitudinal reinforcing bars crossing a crack, acting as dowels to transfer shear forces.
Truss analogy: Simplified model representing shear behaviour as concrete compression struts and steel tension ties forming a truss.
Functionally graded concrete: Concrete whose composition or properties vary spatially to meet different performance requirements within a structural element.
References
- Carbon reduction and strength enhancement in functionally graded reinforced concrete beams. Engineering Structures (2023).
- Machine Learning-Based Model for Predicting the Shear Strength of Slender Reinforced Concrete Beams without Stirrups. Buildings (2022).
- The influence of transverse reinforcement and yielding of flexural reinforcement on the shear-transfer actions of RC members. Engineering Structures (2021).
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