IBC/UBC seismic warning

"**WARNING: IF THIS UBC/IBC ANALYSIS HAS TENSION/COMPRESSION OR REPEAT LOAD OR RE-ANALYSIS OR SELECT OPTIMIZE, THEN EACH UBC/IBC CASE SHOULD BE FOLLOWED BY PERFORM ANALYSIS & CHANGE."

 I did not understand anything from that warning but it contd to analize the structure. I wanna ask you that is my seismic analysis correct?

P.s: I entered 0.8s period values on purpose. And i know my modal analysis is wrong.

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  • It worked perfectly THANK YOU !!!!. :-)

    Hmmmm... now i'm into slab. It keeps failing. 

    first, i made a 0.18m thick slab and assigned it to the most critical slab surface in my structure.

    then I designed it with the following properties :  fc=20700kn/sqm             fyld=276000Kn/sqm         bars from D10-d12

                                                                                           I chose max. moment for the design, and selected DL and LL for loadings

    The span is only 3m by 4m, i even tried 2m x 3 m span and it keeps failing. Is there something i should look into to correct this failure ?

     

     

     

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