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live load distibution and group girders

live load distibution and group girders

live load distibution and group girders

(OP)
Looking for some advice on how to calculate the live load distribution for a set of grouped girders.

Single lane bridge, 4.3 m deck width, 4 glulam girders, spaced in pairs of 2 @ 3.05 m apart. The two girders in the group are spaced 600 mm apart. Should I treat the pair as a one unit and distribute the load at the centre on the pair? This is for the evaluation of and existing structure approx 30m long.
 

RE: live load distibution and group girders

If the two are "tied" laterally so that torsion is eliminated, yes you can consider them as acting together with the load applied and split between them.

RE: live load distibution and group girders

(OP)
Yes they are tied laterally with diaphragms every 4m.

Thanks

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