PSAD SITUATION 12: Shear and Flexure of Continuous RC Beam

CELE Past Board Exam Problem Situation 12: The reinforcement for negative moment of a continuous beam consists of the following: Top bars = 8 – 20 mm diameter bars Bottom bars = 4 – 20 mm diameter bars Stirrups = 10 mm diameter bars Material strength: Concrete: fc’ = 27.5 MPa ρmax = 0.023 Reinforcing steel: fy = 413 MPa (main reinforcement) fyv = 275 MPa Dimensions: h1 = 100 mm; h2 = 400 mm; a = 45 mm; b = 350 mm Clear concrete cover to stirrups = 50 mm Shear strength provided by concrete: V_c=0.17√(f_c') bd Shear strength provided by shear reinforcement: V_s=(A_v f_yv d)/s 1. Compute the nominal shear capacity of the beam Vn (kN) if the stirrups are spaced at 100 mm center to center. 2. Find the nominal moment capacity (kN-m) of the beam at the supports. 3. Where shear is minimum, the stirrups are spaced at 250 mm center to center. Determine the shear strength (kN) provided by the stirrups. Thanks for watching! Comment for questions and suggestions for future lecture in this series. Subscribe and hit the bell button to be notified for future posts. #civilengineering #boardexam #engineering #structuralanalysis #structuralengineering #CivilEngineeringLicensureExamination #PRC #PSAD #reinforcedconcrete #RCD #reinforcedconcretebeam #CELEApril2024