Help Interpreting Base Reaction. Dead Load case produces huge Moments.
Help Interpreting Base Reaction. Dead Load case produces huge Moments.
(OP)
Dear experts,
I need help in defining if my model works fine and displayed the base reaction table:

And to my surprise found that my Dead and Live loads (purely gravitational) produce huge Moment reactions.
Why if I defined that loads as superficial to floor elements, it comes as moment at the base?
Thank you for your thoughts,
Regards
I need help in defining if my model works fine and displayed the base reaction table:

And to my surprise found that my Dead and Live loads (purely gravitational) produce huge Moment reactions.
Why if I defined that loads as superficial to floor elements, it comes as moment at the base?
Thank you for your thoughts,
Regards
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.





RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
Thanks a lot!
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.
RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
I have moved the building, to the origin:
So i got same results for dead/live loads:
Still trying to undestand the values for Base Reactions.
Any suggestions are welcome.
Regards,
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.
RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
You don't need to shift the entire building to its centre to get these dead load moments close to zero. Just use the first model and calculate the eccentricities (Mx/Fz and My/Fz) for each vertical load case. These should be coordinates of the centroid of the vertical load. If it is far off from what it was supposed to be, only then you'd have a problem.
RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
Simple example would be to think of the building as a lamp post with a heavy lamp hanging to one side of the post.
RE: Help Interpreting Base Reaction. Dead Load case produces huge Moments.
thank you both!
Regards
MSc. Eng. Serguei Joa
Structural Engineer
Bouygues Batiment International, Cuba.