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  • Users: Lepista
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  1. Lepista

    Creating tide levels in Excel

    OK, I'm trying to model vessel movements in a port. My model requires the tide levels. They don't need to be 100% accurate, but I want them to be better than simply a sine curve. At present, this is all I am using, in the form: ={Tidal Height}*SIN({Time}/{Tide period}*2*PI()) Tidal height...
  2. Lepista

    Weird concrete slab surface pattern

    I found this weird pattern on an existing concrete slab (exaggerated by some black-ish growth on the higher points), I wonder if anybody can tell me what it is - I have never come across it before. The slab was constructed in the UK about 10 years ago. It is approx 2m thick, and was built...
  3. Lepista

    Ground bearing pressures with two-way eccentric loading

    I have a very old chart for determining the ground pressures underneath a rectangular concrete base where the loading on the base is eccentric in both the X and Y dimensions. There are four cases: 1. where the whole of he base is in compression 2. where a corner of the base is in 'tension' 3...
  4. Lepista

    re-welding on a plate - implications?

    Are there any implications for multiple welding different items in the same location on a piece of plate (i.e. attach something by welding, burning/cutting it off, welding something else on, and repeating)? This is attaching large transportation items onto a structural deck. Many thanks, Lepista
  5. Lepista

    Load Combinations

    Help! I have an analysis where there are several different moving loads. I want to combine them in the following fashion: LC1 + LC2 + Envelope(LC3-LC10) + Envelope(LC11-LC22) NOTE the envelope is not an srss of the loadcases. Is there anyway that STAAD can do this...? Any help much appreciated

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