wind load
wind load
(OP)
Hi all,
please help me.
to calculate wind load on superstructure, what tributary area i should apply for longitudinal direction?
the same area as transverse wind load? or i have to use differenct area?
thanks
please help me.
to calculate wind load on superstructure, what tributary area i should apply for longitudinal direction?
the same area as transverse wind load? or i have to use differenct area?
thanks





RE: wind load
150 psf x A x L
Where 150 psf is the wind pressure (Check also your state or local requirements for different criteria), A is the area of the superstructure in elevation (Curb height, slab height, haunch height, girder and any superelevation), and L is the tributary length of the span at the bent under investigation. In that sense, L is the average of the two spans on either side of the bent. For a longitudinal force analysis, i.e., a total force applied to the frame, L may be taken as the total bridge length. This analysis is usually done to determine the distribution of the forces based on the stiffness of the frame (bent) members. However, if the bents are all about the same height and have similar properties and fixity then the result is the same as the tributary assumption.
RE: wind load
thanks for superstructure wind load.
i am confused with longditudinal wind force calculation on substructure design.
for longditudinal wind load calculation, AASHTO said, i have to use 50 lb for transverse and 12 lb for longditudinal with span less then 125 ft. what is tributray area for longditudinal wind load ?
is it the same as the tributary area of transverse wind load calculation? or i should use transverse area (along the width) ?
AASHTO did not say anything about tributary area for substructure.
thanks again
RE: wind load
RE: wind load