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RE: Which method do you like for calculating deflection

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TJ -

Sounds too simple and easy!


Can you explain the approach? How does it account for boundary conditions?

Thank you,

T. William (Bill) Allen, S.E. (CA #2607)
University of Southern California, M.S.C.E., 1983
University of Texas at El Paso, B.S.C.E., 1977

Consulting Structural Engineers
32302 Camino Capistrano, #206
San Juan Capistrano, CA 92675
V (949) 248-8588•F (949) 209-2509

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of TJ Fu Sent: Monday, March 11, 2013 11:59 AM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] Which method do you like for calculating 

I like to use M/EI approach. It is simple and easy. All you need to do is 
calculating the moments (M) at interior supports. Then the moment from the 
area of the M/EI diagrams on any span will be the deflection you need to 
superimpose to your simple span deflection of that same span.

If you have variable I girders, it will be some cumbersome though. So, I 
developed some programs. It will not only print out the deflections for any 
 span combinations (up to 12 spans), it will also print out influence 
lines, moments, shears and reactions. I have also developed some LRFD 
programs (Pier analysis, Field Splice design). These programs are very 
handy in planning and designing your bridge projects. Let me know if you 
are interested. TJ Fu tzujfu(--nospam--at)

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