generation of impact factor of bridge standard loading
 

generation of impact factor of bridge standard loading
hi friends,
i am working on generating a standard bridge loading for our country. i have established standard design vehicles by analysing the traffic axel load data of our country. now i want to establish a relation for computing impact factor on bridges.
so, can anybody help me by suggesting me the method of calculating impact factor.....?
check out our whitepaper library.
have you tried the bridge engineering forum?
stephen a
the governing bridge code (aashto) here in the usa uses the following formula -
i = 50/(l+125) where l is equal to the span length under investigation. i is limited to 0.3.
for regions of the span where there is continuity over the supports, the l is the average of the adjacent spans.
this has served us well over the years since the code's inception.
regards,
qshake
eng-tips forums:real solutions for real problems really quick.
just to be clear shakildor, qshake noted a percentage of ll, not a factor. the factor would be limited to 1.3 ...... i would hate for your code to specifiy a .3 impact factor.