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structures question

markwarner

New member
View attachment 5214

1.1An end-supported girder with a span of 50 ft
carries a dead load of 500 lb and a live load of 600 lb
per ft. The dead load extends over the entire span of
the girder, and maximum live moment at the center of the
girder occurs with the live load extending over the
entire span.
a) Assuming that the intensity of dead load varies
directly with the girder span but that live-load
intensity remains constant, compute the total maximum
moment at mid-span, for spans varying from 20 to 100 ft,
based on 10 ft intervals.

Question: Compute the impact moments corresponding to
1.1a in accordance with the specifications of the AASHTO.
 

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