812CHAPTER 10Statically Indeterminate BeamsSHEAR FORCEBENDING MOMENTS(L…x…2L) MRAxMAqx22+RBxqx22+2qLx2qL2(0…x…L) MRAxMAqx22qx22qLx8+qL28V2qLqx(L…x…2L) VRAqxqL8qx(0…x…L) SHEAR FORCE AND BENDING MOMENT DIAGRAMSMVqL2/80.3904L0–qL2/2–qL/8–9qL/8qLLLProblem 10.4-4Two flat beams ABand CD, lying in horizontal planes, cross at right angles and jointly support a vertical load Pat their midpoints (seefigure). Before the load Pis applied, the beams just touch each other. Bothbeams are made of the same material and have the same widths. Also, the endsof both beams are simply supported. The lengths of beams ABand CDare LABand LCD, respectively.
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