huangyhg

cooper e10 train loading interpretation
i have a table of the cooper e10 train loading (found in any civil eng'g handbook) which gives 'simple span beam maximum moments shears and reactions for various spans' per axle. i do not understand the 'max beam reaction' column of the table, can anyone help?
this column in the table references a footnote that reads 'from two spans', does this mean that the reported reaction value is considering beams framing from two sides of a support member? if so, can anyone confirm that the max moment and shear only considers one span.
thanks in advance.
jipe - i must have the same table that you are using. the "max. floor beam reaction, kips" is the total for two spans. that is, the load that the pier that supports the two spans has to resist. take for example, a pair of 40 ft. spans - look at the column labeled "equivalent uniform load, kips per ft. - reaction". the value is 1.35. since this is an equivalent uniform load, the tributary area of each of the two 40 ft. spans is 20 ft. therefore the applied load to the pier is: 1.35 k/ft x 20 ft x 2 spans = 54 kips.
using a similar approach, the equivalent uniform loads for shear & moment will show that these tabulated values are for one span.
be sure to consider impact loads, multiple tracks, and to multiply the e10 loading by the appropriate factor to get the final loading.
thanks.

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