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I'm interested in some theory Eurocode 1: Actions on structures - Part 2: Traffic loads on bridges. How were the limits chosen (e.g. maximum deck acceleration = 3.50 m/s2)? Why is the lower limit of $n_0$ governed by dynamic impact criteria and given by the following?

$$n_0 = \begin{cases} 80/L, &4m<L<20m \\[2ex] 23,58L^{-0,592}, &20m<L<100m \end{cases}$$

Air
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    Do the eurocodes have commentary sections included with them? Usually these types of questions are addressed in the commentary. – hazzey Jan 20 '16 at 15:17
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    @hazzey There are lots of manuals on how to apply the Eurocodes, but I have never seen a commentary such as what exists for the ASCE codes. I have found tracing down the origin of the formulas/constants in Eurocodes extremely difficult. Would be very interested if someone has compiled such information! – atom44 Jan 20 '16 at 18:41
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    Since Eurocode 1: Actions on Structures - Part 2 appears to be quite lengthy, could you provide a more specific code reference? (i.e. what section number or annex is the maximum deck acceleration limit and n0 equation coming from?) – CableStay Jan 25 '16 at 20:08

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