Recent content by Bartek22

I need to know natural frequency of foundation to compare this with operating frequency. To avoid resonant ratio should be outside 0,7-1,3FR where FR is machine speed divided by natural frequency. As you can see, having different machine speeds causes that I have 2 ratios and I dont know if I...

I know operation frequencies (see my first post).Mass will be designed to be 5-7 times bigger than the equipment.

It's not that easy. Settelment is a priority in this case and we need to provide the same for pump+turbine and for pipes around. That is why it must to be placed on one foundation (together with pipe supports). Besides area around is very crowded so probably I will need to use micropiles to...

Hi guys, I am trying to design foundation for heavy vibrant machinery using PVAP/SVAP software (I am not sure if anybody outside FLUOR knows this software). Because in software I am using for calculations there is only one place to input one speed I am not sure which one should I check. Here's...

Ron is right, I would suggest to use following formula M.ovrt=Fwind*(height of the column + 250mm + height of the plinth (if appears)) Then you have stabilizing moment which is: M.stab=(Foundation selfweight+Axial force+ soil on the slab) x 1/2 of slab lenght M.stab/M.ovrt > 1.5 I am...

Thanks a lot guys, 4ntunes - great explanation, thank you very much. Finally I have calculated that tank (and 3 others) according to API650 and our client requirements, however your tips will be very useful in the future. BigH - Ringwall has been required by a client. I had nothing to say. And...

Civilperson - Thanks a lot. I thought so but I wasn't sure. Have a nice day

Hi guys, We are just calculating foundation for a tank 25m wide (diameter) and 12m high. Can somebody tell me a quick way to calculate soil bearing pressure under this wall. Thank you in advance for your help.