Influence Line Diagrams for Simply Supported Beams - Problem No 4 (with two point loads)

Two wheel loads of 40 KN and 20 KN spaced 4m apart cross a girder of 20 meters span, with the 20KN load leading , from left to right. Draw the influence lines for shear force and bending moment and find the maximum bending moment and maximum positive and negative shear force at 7m from the left support. Also find the maximum absolute bending moment, absolute maximum positive shear force and absolute maximum negative shear force.

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