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Re: Which method do you like for calculating deflection

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I don't see how influence lines can help me with rolling loads. I know bridges are subject to rolling loads but how do you choose the worst location for 2 or 3 cranes each with different wheel loads and variable spacing between them.

I have a customer now who has a 15 ton crane and 7.5 ton crane and wants to know how close he can operate them while fully loaded and then only 50% loaded for one or the other.


On 2013/03/16 3:16 PM, TJ Fu wrote:
Dealing with moments and shears for continuous spans (constant I), I always use M&V influence coefficients from AISC “Moments, Shears and Reactions for Continuous Highway Bridges”. That will give you maximum/minimum M&V at any point. For any odd span combinations or variable I spans, you could use my programs.

On Sat, Mar 16, 2013 at 9:11 AM, Gary L. Hodgson and Assoc. <
design(--nospam--at)> wrote:

I am looking for both max moment and moment at a specific location. What
you say in the 2nd para is true and frustrating.

On 2013/03/14 11:10 AM, Lloyd Pack wrote:


Can you clarify your statement a little more.  Are you looking for

Truncated 666 characters in the previous message to save energy.

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