Question

May 2017-16-Civ-A1 Page 5 of 7 (9) S. a) Loads move along beams at the top chord level of the truss shown below. Draw the influence lines for forces in members: U3L2 U3 U4 6m om n. Us For each influence line, calculate and indicate the value of the influence ordinate atthe ¼Mand ¾ points along the truss span. A vehicle, which is idealized as the uniformly distributed load over a length of 10 m., moves across the simple beam shown. Draw the influence line for shear at Section -; calculate and label the ordinates of the influence line. Calculate the maximum absolute value of the shear at Sectionⓛ_( caused by the vehicle as it crosses the structure. b) Direction of Travel Idealized Vehicle

Answer 1

0.5 2 fe ku 2.4* e'y 25 'So,

tD to 02 0-6S 0-6S 叨 OY 20m abtolole Sm 23- (9oo) (40) 160 k