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If i were to do a finite element analysis of a retaining wall- would create plate elements for the concrete wall? What would i use for the reinforcement bars? I am going to use an interface elements to account for soil structure interaction. Thanks,

Irstuff. C++ has been used to program steel design per lrfd even though its a general purpose programming. I'm just looking for where I could get source code because I would like to make changes if needed. That's all.

Thanks ron Do you know where I can get that source code for c? I do not want to reinvent wheel but I would like the code so I can do my own modifications as necessary. Thanks

Does anyone have a sample commands to program steel design LRFD with C++ Language? I want to learn more about C++ and its use in steel design. Thanks,

cooperDBM- Thank you for the valuable information. Do you know where i can obtain sample programming language for steel design per LRFD? Thanks,

Where can i buy C++ language for windows and how much does it cost? Thanks

Qshake thanks for the reply. I see on the fill side how the bars are resisting the negative moment but it seems that the on the stream side the thickness is usually 3 to 4 feet for an integral abutment that on the stream side and in between beams, those bars wouldn't be seeing alot but maybe i...

Has anyone used Real3D general finite element software/structural analysis package? If so what are your opinions of it. Thanks,

I have a question regarding the bars that are between the beams of an integal abutment- what are they really doing besides temp and shrink steel? THe rear face bars are design to take the passive earth pressure assumed simply supported between beams. Any movement of the beams is going to happen...

I have a question regarding integral abutments. I realize in the diaphragm portion rear face bars are designed to take passive earth pressure. However my question is the the bars that are between beams- what are they really doing other than temp and shrink steel- i get the argument from...

Does anyone know if why temporary shoring is designed with LRFD theses days- it seems so much more confusing for a temporary structures. In addition, its not as if ASD is unsafe? Thanks, Tim

Does anyone know what and if any code changes there are between the 1998 and 2004 AASHTO Code for the steel section? Thanks, Tim

Does anyone out there know if there is a spreadsheet or how easily it is to convert LRFD allowable bearing capacity to LFD? Thanks, Tim

Does anyone out there know if Auto FEA exists by JH Analyzer? They do allow you to download a trial version but they do not respond to email or calls? Let me know. PS- I guess there based out in California allegedly. Thanks, Tim

Does anyone know where i could obtain design examples on frame building load developements. For example if i have a six-story frame and i am analzing it using a "dummy column" to account for the gravity forces during a dynamic analysis. Is there examples out there? Thanks,

If the period in the first mode of my six story split level frame is 0.72 seconds. It was analyzed using El Centro Earthquake North-South. How do i read the spectral acceleration graphs and determine where the locations on the spectral acc. impact the frame the most? Thanks for your help.

Why is this amusing?

This is just a general question. When doing a non-linear time history analysis, changing the time step drastically changed the results. For instance a time step was used of 0.002 was changed to 0.005 which seem to produce more realistic results.

Why can changing the dt= time step, effect the non-linear time history results for x-displacements? I hope someone can provide insight. Thanks, tre

I am wondering what the spectral acceleration graph tells you? How is this used in determination of roof displacements, etc? I have plotted one using an inelastic dynamic analysis program. The plot is of the El Centro 1940 north-south ground motion.You can see the different % of damping- what...