PSAD Refresher Series

Currently Playing: PSAD Refresher 91: Design for Flexure and Torsion of Reinforced Concreted Beam

Enrol to our Review Center: https://www.facebook.com/share/1AC24Wsb9v/?mibextid=wwXIfr SITUATION: The girder AB shown is subjected to torsional moment from the loads in the cantilever frame. The following factored forces are computed from this beam: Factored (negative) moment at the face of the support, Mu = 440 kN-m. Factored shear at the critical section near the face of the support, Vu = 220 kN. Factored torque at critical section near the face of the support, Tu = 50 kN-m. The girder has width 400 mm and overall depth of 500 mm. Concrete cover is 40 mm. The centroid of longitudinal bars of the girder are placed 65 mm from the extreme concrete fiber. Concrete strength f’c = 20.7 MPa and steel yield strength for longitudinal bars fy = 415 MPa. Use 12-mm U-stirrups with fyt = 275 MPa. Use reduction factor for shear = 0.75 and for flexure = 0.90. 1. Calculate the required longitudinal tension bars (mm2) based on ultimate bending moment. A. 2352 C. 3212 B. 3115 D. 3894 2. Calculate the required spacing (mm) of stirrups based combined shear and torsion. A. 50 C. 65 B. 60 D. 85 3. Required additional area (mm2) of longitudinal bars due to torsion. A. 1077 C. 985 B. 1304 D. 880 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 #theoryofstructures #cele #strengthofmaterials #mechanicsofmaterials #staticsofrigidbodies #steeldesign #compressionmember #trusses #friction #refresher #PSADRefresher #SHET