• Amplitude-frequency result via Time history analysis

    Dear Sir/Madame, I have performed a time history analysis (for instance by definition of cycle=100 and frequency=50Hz and a given amplitude) for which I could have amplitude-frequency graphs as well as amplitude-time graphs as the results. I am wondering…

  • How to know the natural frequency of a particular beam/element?

    Good day everyone! How can I get the natural frequency of a particular beam/ element in STAAD.Pro v8i? My client is requiring me to check this condition which involved the checking of frequency of a particular beam as seen in Table A in attached…

  • contradictory frequences in steady state analysis results

    Dear all, I have a model in which I have defined the "sin" type of time history with an operational frequency of 50Hz. In term of results, I can get both displacement-time and displacement-frequency curves which firstly mean the software has perfomed…

  • RE: Difference between wall with openings and individual walls

    The difference is in the total applied load force wind Y model 1 127 k model 2 343 k As reported in the Loads and Applied force report (and also in the analysis log total reactions). The reason for the difference is…

  • RE: How to perform a steady state analysis of structure?

    The steady state analysis needs to be defined using the input command file ( STAAD editor ). Please refer to section 5.37.6 of the technical reference on how to set up the steady state analysis. Section 5.37.6.8 contains multiple examples showing the…

  • RE: WIND

    Your modal analysis looks correct. The only change I would suggest is to use positive values for all the loads when you are doing a modal calculation, as these loads are only used to calculate the masses. A modified file is attached for your reference…

  • RE: Wind Pressure using Flexible diaphragm vs. Flexible-Psuedo Diaphragm Analysis

    You get a different frequency values and that affects the Gust factor which, in turn, affects the total pressure. You may want to manually specify the frequency for the wind load in advance when using flexible diaphragm types Check our post on Pseudo…

  • RE: How to calculating the frequencies of a structure in the analysis together with wind load and selfweight

    Seems like you are trying to capture the dynamic effect due to the wind loading plus dead load and trying to find out the structural responses like displacement, support reactions, member forces due to that. That is not possible. The wind load generation…

  • Verification of cantilever beam analysis in STAAD

    Never having used STAAD for modal analysis before, I referred to Example 15 of the STAAD verification manual which demonstrates how the natural frequency of a simply supported beam . For my requirement , I first I attempted to model a simple cantilever…

  • Group Loads / Link text / Rayleigh Calc a load case?

    I need to perform some rayleigh frequency analysis on several load cases of a foundation I am working on. Is there a way to either link text, group loads (other than the obvious load combinations), or run a rayleigh frequency analysis on a load…
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