RC Beam Analysis & Design: Structural Engineering Basics - by Engr. DANISHWAR KHAN

Reinforced concrete beam introduction Importance of beams in structural engineering Basic concept of reinforced concrete structures Role of concrete in compression Role of steel reinforcement in tension Difference between RCC and plain concrete Types of reinforced concrete beams Simply supported beam Fixed-ended beam Continuous beam Cantilever beam Overhanging beam Beam supports and boundary conditions Beam span and effective span Beam width and overall depth Effective depth of an RC beam Clear cover in reinforced concrete beams Concrete grades and compressive strength Steel reinforcement grades Dead load on beams Live load on beams Self-weight calculation of beams Wall load acting on beams Slab load transfer to beams Tributary width concept Load distribution in framed structures Uniformly distributed load Concentrated point load Triangular distributed load Trapezoidal distributed load Load combinations for structural design Basic principles of structural analysis Equilibrium equations in beam analysis Calculation of support reactions Shear force in beams Bending moment in beams Shear force diagram (SFD) Bending moment diagram (BMD) Sign convention for shear force Sign convention for bending moment Maximum shear force calculation Maximum bending moment calculation Simply supported beam under UDL Simply supported beam with a point load Beam carrying combined loads Cantilever beam under UDL Cantilever beam with a point load Relationship between load, shear force, and bending moment Point of contraflexure in continuous beams Positive and negative bending moments Basic concept of flexural stress Neutral axis in reinforced concrete beams Stress distribution across a beam section Cracking of concrete under tension Under-reinforced beam section Balanced reinforced concrete beam section Over-reinforced beam section Ductile and brittle failure in RC beams Fundamental concepts of limit state design Working stress method overview Limit state design method overview Introduction to ACI and relevant design codes Preliminary selection of beam dimensions Calculation of factored bending moment Calculation of factored shear force Flexural design of reinforced concrete beams Required area of tensile reinforcement Selection of longitudinal reinforcement bars Calculation of reinforcement ratio Minimum reinforcement requirements Maximum reinforcement limitations Compression reinforcement in doubly reinforced beams Design of singly reinforced concrete beams Design of doubly reinforced concrete beams Nominal moment capacity Design strength and strength reduction factors Shear stress in reinforced concrete beams Concrete contribution to shear resistance Design of shear reinforcement Stirrups and their functions Closed stirrups and reinforcement anchorage Spacing of shear reinforcement Development length of reinforcement Lap splice requirements in beams Anchorage of longitudinal reinforcement Curtailment of reinforcement bars Top reinforcement and bottom reinforcement Negative moment reinforcement over supports Positive moment reinforcement at midspan Torsion in reinforced concrete beams Deflection control in RC beams Crack control and serviceability requirements Reinforcement detailing according to applicable codes Beam-column joint detailing Seismic detailing of reinforced concrete beams Common mistakes in RC beam design Practical reinforcement inspection at construction sites Quality control of concrete and reinforcement Final review of RC beam analysis and design principles Learning objective: Understand how to analyze beam loads, calculate support reactions, draw shear force and bending moment diagrams, determine the required reinforcement, and apply fundamental RC beam design and detailing principles. Note: Actual beam dimensions, reinforcement, shear design, and detailing must be verified using the applicable design code, material properties, loading conditions, support arrangement, and complete structural analysis.